From 46f0b42873d91c216a748ce8cb6ed30697148a4d Mon Sep 17 00:00:00 2001
From: Jack May <jack@solana.com>
Date: Fri, 31 Jul 2020 16:35:49 -0700
Subject: [PATCH] Programs can be client dependencies (#181)

---
 .gitignore                               |    2 +-
 .travis.yml                              |   16 +-
 bpf-sdk-install.sh                       |    2 +-
 ci/client/Cargo.lock                     | 2194 +++++++++++++++++++++
 ci/client/Cargo.toml                     |   14 +
 ci/client/src/main                       |    0
 ci/client/src/main.rs                    |   10 +
 ci/clients.sh                            |    8 +
 ci/memo.sh                               |    7 +-
 ci/token-swap.sh                         |   10 +-
 ci/token.sh                              |    5 +-
 do.sh                                    |    8 +-
 memo/Cargo.lock                          | 1907 +++++++++++++++++--
 memo/Cargo.toml                          |    5 +-
 memo/src/{processor.rs => entrypoint.rs} |    3 +
 memo/src/lib.rs                          |    6 +-
 token-swap/Cargo.lock                    | 2015 +++++++++++++++++---
 token-swap/Cargo.toml                    |    8 +-
 token-swap/inc/token-swap.h              |   10 +-
 token-swap/src/entrypoint.rs             |   24 +
 token-swap/src/error.rs                  |   27 +-
 token-swap/src/instruction.rs            |    4 +-
 token-swap/src/lib.rs                    |    7 +
 token-swap/src/processor.rs              |  638 ++++++-
 token-swap/src/state.rs                  |  643 +------
 token/Cargo.lock                         | 2005 +++++++++++++++++---
 token/Cargo.toml                         |    5 +-
 token/src/entrypoint.rs                  |   24 +
 token/src/error.rs                       |   59 +-
 token/src/lib.rs                         |    1 +
 token/src/processor.rs                   | 2200 +++++++++++++++++++++-
 token/src/state.rs                       | 2162 +--------------------
 32 files changed, 10451 insertions(+), 3578 deletions(-)
 create mode 100644 ci/client/Cargo.lock
 create mode 100644 ci/client/Cargo.toml
 create mode 100644 ci/client/src/main
 create mode 100644 ci/client/src/main.rs
 create mode 100755 ci/clients.sh
 rename memo/src/{processor.rs => entrypoint.rs} (95%)
 create mode 100644 token-swap/src/entrypoint.rs
 create mode 100644 token/src/entrypoint.rs

diff --git a/.gitignore b/.gitignore
index 84576e562b74e1..f37f75552e134b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-*/target/
+target
 .env
 .vscode
 bin
diff --git a/.travis.yml b/.travis.yml
index 85e44a56585170..b51995b0b7d503 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,27 +14,33 @@ services:
 
 jobs:
   include:
-    - name: "Test Memo"
+    - name: "Test programs as clients"
       language: rust
       install:
         source .travis/install-program-deps.sh
       script:
-        ./ci/memo.sh
+        ./ci/clients.sh
 
-    - name: "Test Token-Swap"
+    - name: "Test Memo"
       language: rust
       install:
         source .travis/install-program-deps.sh
       script:
-        ./ci/token-swap.sh
+        ./ci/memo.sh
 
-    - name: "Test Token Program"
+    - name: "Test Token"
       language: rust
       install:
         source .travis/install-program-deps.sh
       script:
         ./ci/token.sh
 
+    - name: "Test Token-Swap"
+      language: rust
+      install:
+        source .travis/install-program-deps.sh
+      script:
+        ./ci/token-swap.sh
 
     # docs pull request or commit to master
     - name: "Build Docs"
diff --git a/bpf-sdk-install.sh b/bpf-sdk-install.sh
index f038c210377086..20a667cb9ce783 100755
--- a/bpf-sdk-install.sh
+++ b/bpf-sdk-install.sh
@@ -2,7 +2,7 @@
 set -e
 
 installDir=$1
-channel=v1.2.3
+channel=beta
 
 if [[ -n $2 ]]; then
   channel=$2
diff --git a/ci/client/Cargo.lock b/ci/client/Cargo.lock
new file mode 100644
index 00000000000000..be77c8e6d534ab
--- /dev/null
+++ b/ci/client/Cargo.lock
@@ -0,0 +1,2194 @@
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diff --git a/ci/client/Cargo.toml b/ci/client/Cargo.toml
new file mode 100644
index 00000000000000..3f583dcdb4da58
--- /dev/null
+++ b/ci/client/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "test-client"
+version = "0.1.0"
+authors = ["Jack May <jack@solana.com>"]
+edition = "2018"
+
+# Used to ensure that SPL programs are buildable by external clients
+
+[dependencies]
+solana-sdk = { version = "=1.2.13", default-features = false }
+spl-memo = { path = "../../memo" }
+spl-token = { path = "../../token" }
+spl-token-swap = { path = "../../token-swap" }
+
diff --git a/ci/client/src/main b/ci/client/src/main
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/ci/client/src/main.rs b/ci/client/src/main.rs
new file mode 100644
index 00000000000000..75a3b1991f0cb5
--- /dev/null
+++ b/ci/client/src/main.rs
@@ -0,0 +1,10 @@
+fn main() {
+    let sdk_dep = solana_sdk::signature::Signature::default();
+    println!("Yes have some sdk_dep {:?}", sdk_dep);
+    let memo_dep = spl_memo::id();
+    println!("Yes have some memo_dep {:?}", memo_dep);
+    let token_dep = spl_token::id();
+    println!("Yes have some token_dep {:?}", token_dep);
+    let token_swap_dep = spl_token_swap::id();
+    println!("Yes have some token_swap_dep {:?}", token_swap_dep);
+}
diff --git a/ci/clients.sh b/ci/clients.sh
new file mode 100755
index 00000000000000..96cc53f7185833
--- /dev/null
+++ b/ci/clients.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+set -e
+
+# Build programs as clients
+cd "$(dirname "$0")/.."
+./do.sh build-lib memo -D warnings
+cargo run --manifest-path=ci/client/Cargo.toml
diff --git a/ci/memo.sh b/ci/memo.sh
index fdbdbc5d452194..0b1fcdcf4efca5 100755
--- a/ci/memo.sh
+++ b/ci/memo.sh
@@ -1,12 +1,11 @@
 #!/usr/bin/env bash
 
-cd "$(dirname "$0")/.."
-
-set -e
+set -ex
 
+# Test program
+cd "$(dirname "$0")/.."
 ./do.sh update
 ./do.sh fmt memo --all -- --check
-./do.sh build-native memo -D warnings
 ./do.sh build memo
 ./do.sh clippy memo -- --deny=warnings
 ./do.sh doc memo
diff --git a/ci/token-swap.sh b/ci/token-swap.sh
index a6b028195c8d70..74fe2e4f43c21b 100755
--- a/ci/token-swap.sh
+++ b/ci/token-swap.sh
@@ -1,25 +1,25 @@
 #!/usr/bin/env bash
 
-set -e
+set -ex
 
+# Test program
 cd "$(dirname "$0")/.."
-
 ./do.sh update
 ./do.sh build token
 ./do.sh fmt token-swap --all -- --check
-./do.sh build-native token-swap -D warnings
+./do.sh build-lib token-swap -D warnings
 ./do.sh build token-swap
 ./do.sh clippy token-swap -- --deny=warnings
 ./do.sh doc token-swap
 ./do.sh test token-swap
 cc token-swap/inc/token-swap.h -o token-swap/target/token-swap.gch
 
+# Install dependency project
 cd "token/js"
-
 npm install
 
+# Test js bindings
 cd "../../token-swap/js"
-
 npm install
 npm run lint
 npm run flow
diff --git a/ci/token.sh b/ci/token.sh
index 1fc5629fdbd1e2..8593c17f416eeb 100755
--- a/ci/token.sh
+++ b/ci/token.sh
@@ -2,19 +2,18 @@
 
 set -ex
 
+# Test program
 cd "$(dirname "$0")/.."
-
 ./do.sh update
 ./do.sh fmt token --all -- --check
-./do.sh build-native token  -D warnings
 ./do.sh build token
 ./do.sh clippy token -- --deny=warnings
 ./do.sh doc token
 ./do.sh test token
 cc token/inc/token.h -o token/target/token.gch
 
+# Test js bindings
 cd "$(dirname "$0")/../token/js"
-
 npm install
 npm run lint
 npm run flow
diff --git a/do.sh b/do.sh
index 49b957b47248f0..637cc9affd690a 100755
--- a/do.sh
+++ b/do.sh
@@ -7,7 +7,7 @@ usage() {
 Usage: do.sh <action> <project> <action specific arguments>
 Supported actions:
     build
-    build-native
+    build-lib
     clean
     clippy
     doc
@@ -42,7 +42,7 @@ perform_action() {
             echo "$projectDir does not contain a program, skipping"
         fi
         ;;
-    build-native)
+    build-lib)
         (
             cd "$projectDir"
             echo "build $projectDir"
@@ -57,7 +57,7 @@ perform_action() {
         (
             cd "$projectDir"
             echo "clippy $projectDir"
-            cargo +nightly clippy ${@:3}
+            cargo +nightly clippy  --features=program ${@:3}
         )
         ;;
     doc)
@@ -125,7 +125,7 @@ perform_action() {
         (
             cd "$projectDir"
             echo "test $projectDir"
-            cargo +nightly test ${@:3}
+            cargo test --features=program ${@:3}
         )
         ;;
     update)
diff --git a/memo/Cargo.lock b/memo/Cargo.lock
index 109811dbc711fa..7398cc01371d7a 100644
--- a/memo/Cargo.lock
+++ b/memo/Cargo.lock
@@ -1,10 +1,65 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "addr2line"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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+]
+
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+name = "adler"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
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+version = "1.3.0"
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+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "hermit-abi 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.74 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "backtrace"
+version = "0.3.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "addr2line 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.74 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miniz_oxide 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "object 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "bincode"
 version = "1.2.1"
@@ -14,6 +69,11 @@ dependencies = [
  "serde 1.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
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+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
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@@ -38,6 +98,11 @@ name = "bs58"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
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+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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@@ -58,322 +123,1912 @@ version = "1.3.4"
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+ "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
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+name = "bytes"
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- "subtle 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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-version = "0.8.1"
+name = "cc"
+version = "1.0.49"
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 dependencies = [
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+ "jobserver 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
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diff --git a/memo/Cargo.toml b/memo/Cargo.toml
index 1aaaaf20158e91..88f170c0885459 100644
--- a/memo/Cargo.toml
+++ b/memo/Cargo.toml
@@ -11,10 +11,13 @@ license = "Apache-2.0"
 edition = "2018"
 
 [features]
+no-entrypoint = []
 skip-no-mangle = ["solana-sdk/skip-no-mangle"]
+program = ["solana-sdk/program"]
+default = ["solana-sdk/default"]
 
 [dependencies]
-solana-sdk = { version = "=1.2.13", default-features = false, features=["program"] }
+solana-sdk = { version = "=1.2.13", default-features = false, optional = true }
 
 [lib]
 name = "spl_memo"
diff --git a/memo/src/processor.rs b/memo/src/entrypoint.rs
similarity index 95%
rename from memo/src/processor.rs
rename to memo/src/entrypoint.rs
index 41edf31e855a3d..56adbbb8be6ebe 100644
--- a/memo/src/processor.rs
+++ b/memo/src/entrypoint.rs
@@ -1,5 +1,8 @@
 //! Program entrypoint definitions
 
+#![cfg(feature = "program")]
+#![cfg(not(feature = "no-entrypoint"))]
+
 use solana_sdk::{
     account_info::AccountInfo, entrypoint, entrypoint::ProgramResult, program_error::ProgramError,
     pubkey::Pubkey,
diff --git a/memo/src/lib.rs b/memo/src/lib.rs
index 712afc8a766fbb..56571644c152d6 100644
--- a/memo/src/lib.rs
+++ b/memo/src/lib.rs
@@ -2,6 +2,10 @@
 
 //! A simple program that accepts a string of encoded characters and verifies that it parses. Currently handles UTF-8.
 
-pub mod processor;
+pub mod entrypoint;
+
+// Export current solana-sdk types for downstream users who may also be building with a different
+// solana-sdk version
+pub use solana_sdk;
 
 solana_sdk::declare_id!("Memo1UhkJRfHyvLMcVucJwxXeuD728EqVDDwQDxFMNo");
diff --git a/token-swap/Cargo.lock b/token-swap/Cargo.lock
index d9931f41d84cfe..88b04ee28f27a7 100644
--- a/token-swap/Cargo.lock
+++ b/token-swap/Cargo.lock
@@ -1,14 +1,44 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "addr2line"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b6a2d3371669ab3ca9797670853d61402b03d0b4b9ebf33d677dfa720203072"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "043164d8ba5c4c3035fec9bbee8647c0261d788f3474306f93bb65901cae0e86"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 dependencies = [
- "winapi",
+ "winapi 0.3.9",
 ]
 
+[[package]]
+name = "assert_matches"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7deb0a829ca7bcfaf5da70b073a8d128619259a7be8216a355e23f00763059e5"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -17,7 +47,7 @@ checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
  "hermit-abi",
  "libc",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -26,6 +56,27 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
+[[package]]
+name = "backtrace"
+version = "0.3.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46254cf2fdcdf1badb5934448c1bcbe046a56537b3987d96c51a7afc5d03f293"
+dependencies = [
+ "addr2line",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+ "serde",
+]
+
+[[package]]
+name = "base64"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3441f0f7b02788e948e47f457ca01f1d7e6d92c693bc132c22b087d3141c03ff"
+
 [[package]]
 name = "bincode"
 version = "1.3.1"
@@ -51,7 +102,7 @@ dependencies = [
  "block-padding",
  "byte-tools",
  "byteorder",
- "generic-array",
+ "generic-array 0.12.3",
 ]
 
 [[package]]
@@ -69,6 +120,12 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "476e9cd489f9e121e02ffa6014a8ef220ecb15c05ed23fc34cca13925dc283fb"
 
+[[package]]
+name = "bumpalo"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e8c087f005730276d1096a652e92a8bacee2e2472bcc9715a74d2bec38b5820"
+
 [[package]]
 name = "bv"
 version = "0.11.1"
@@ -91,6 +148,23 @@ version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
 
+[[package]]
+name = "bytes"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206fdffcfa2df7cbe15601ef46c813fce0965eb3286db6b56c583b814b51c81c"
+dependencies = [
+ "byteorder",
+ "either",
+ "iovec",
+]
+
+[[package]]
+name = "bytes"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e4cec68f03f32e44924783795810fa50a7035d8c8ebe78580ad7e6c703fba38"
+
 [[package]]
 name = "cbindgen"
 version = "0.14.2"
@@ -109,12 +183,33 @@ dependencies = [
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+dependencies = [
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+ "num-traits",
+ "time",
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+
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@@ -131,521 +226,1723 @@ dependencies = [
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+checksum = "df720b6581784c118f0eb4310796b12b1d242a7eb95f716a8367855325c25f89"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-queue",
+ "crossbeam-utils",
+ "futures",
+ "lazy_static",
+ "log",
+ "num_cpus",
+ "slab",
+ "tokio-executor",
+]
 
 [[package]]
-name = "syn"
-version = "0.15.44"
+name = "tokio-timer"
+version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
+checksum = "93044f2d313c95ff1cb7809ce9a7a05735b012288a888b62d4434fd58c94f296"
 dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "unicode-xid 0.1.0",
+ "crossbeam-utils",
+ "futures",
+ "slab",
+ "tokio-executor",
 ]
 
 [[package]]
-name = "syn"
-version = "1.0.33"
+name = "tokio-udp"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8d5d96e8cbb005d6959f119f773bfaebb5684296108fb32600c00cde305b2cd"
+checksum = "e2a0b10e610b39c38b031a2fcab08e4b82f16ece36504988dcbd81dbba650d82"
 dependencies = [
- "proc-macro2 1.0.18",
- "quote 1.0.7",
- "unicode-xid 0.2.1",
+ "bytes 0.4.12",
+ "futures",
+ "log",
+ "mio",
+ "tokio-codec",
+ "tokio-io",
+ "tokio-reactor",
 ]
 
 [[package]]
-name = "tempfile"
-version = "3.1.0"
+name = "tokio-uds"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
+checksum = "ab57a4ac4111c8c9dbcf70779f6fc8bc35ae4b2454809febac840ad19bd7e4e0"
 dependencies = [
- "cfg-if",
+ "bytes 0.4.12",
+ "futures",
+ "iovec",
  "libc",
- "rand",
- "redox_syscall",
- "remove_dir_all",
- "winapi",
+ "log",
+ "mio",
+ "mio-uds",
+ "tokio-codec",
+ "tokio-io",
+ "tokio-reactor",
 ]
 
 [[package]]
-name = "textwrap"
-version = "0.11.0"
+name = "tokio-util"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+checksum = "be8242891f2b6cbef26a2d7e8605133c2c554cd35b3e4948ea892d6d68436499"
 dependencies = [
- "unicode-width",
+ "bytes 0.5.6",
+ "futures-core",
+ "futures-sink",
+ "log",
+ "pin-project-lite",
+ "tokio 0.2.22",
 ]
 
 [[package]]
-name = "thiserror"
-version = "1.0.20"
+name = "toml"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dfdd070ccd8ccb78f4ad66bf1982dc37f620ef696c6b5028fe2ed83dd3d0d08"
+checksum = "ffc92d160b1eef40665be3a05630d003936a3bc7da7421277846c2613e92c71a"
 dependencies = [
- "thiserror-impl",
+ "serde",
 ]
 
 [[package]]
-name = "thiserror-impl"
-version = "1.0.20"
+name = "tower-service"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd80fc12f73063ac132ac92aceea36734f04a1d93c1240c6944e23a3b8841793"
+checksum = "e987b6bf443f4b5b3b6f38704195592cca41c5bb7aedd3c3693c7081f8289860"
+
+[[package]]
+name = "tracing"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbdf4ccd1652592b01286a5dbe1e2a77d78afaa34beadd9872a5f7396f92aaa9"
 dependencies = [
- "proc-macro2 1.0.18",
- "quote 1.0.7",
- "syn 1.0.33",
+ "cfg-if",
+ "log",
+ "tracing-core",
 ]
 
 [[package]]
-name = "toml"
-version = "0.5.6"
+name = "tracing-core"
+version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffc92d160b1eef40665be3a05630d003936a3bc7da7421277846c2613e92c71a"
+checksum = "94ae75f0d28ae10786f3b1895c55fe72e79928fd5ccdebb5438c75e93fec178f"
 dependencies = [
- "serde",
+ "lazy_static",
 ]
 
+[[package]]
+name = "try-lock"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"
+
 [[package]]
 name = "typenum"
 version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
 
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check",
+]
+
+[[package]]
+name = "unicode-bidi"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
+dependencies = [
+ "matches",
+]
+
+[[package]]
+name = "unicode-normalization"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6fb19cf769fa8c6a80a162df694621ebeb4dafb606470b2b2fce0be40a98a977"
+dependencies = [
+ "tinyvec",
+]
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.6.0"
@@ -670,18 +1967,154 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
 
+[[package]]
+name = "untrusted"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
+
+[[package]]
+name = "url"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "829d4a8476c35c9bf0bbce5a3b23f4106f79728039b726d292bb93bc106787cb"
+dependencies = [
+ "idna",
+ "matches",
+ "percent-encoding",
+]
+
 [[package]]
 name = "vec_map"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
+[[package]]
+name = "version_check"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+
+[[package]]
+name = "want"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
+dependencies = [
+ "log",
+ "try-lock",
+]
+
 [[package]]
 name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0563a9a4b071746dd5aedbc3a28c6fe9be4586fb3fbadb67c400d4f53c6b16c"
+dependencies = [
+ "cfg-if",
+ "serde",
+ "serde_json",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc71e4c5efa60fb9e74160e89b93353bc24059999c0ae0fb03affc39770310b0"
+dependencies = [
+ "bumpalo",
+ "lazy_static",
+ "log",
+ "proc-macro2 1.0.18",
+ "quote 1.0.7",
+ "syn 1.0.33",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95f8d235a77f880bcef268d379810ea6c0af2eacfa90b1ad5af731776e0c4699"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97c57cefa5fa80e2ba15641578b44d36e7a64279bc5ed43c6dbaf329457a2ed2"
+dependencies = [
+ "quote 1.0.7",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "841a6d1c35c6f596ccea1f82504a192a60378f64b3bb0261904ad8f2f5657556"
+dependencies = [
+ "proc-macro2 1.0.18",
+ "quote 1.0.7",
+ "syn 1.0.33",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93b162580e34310e5931c4b792560108b10fd14d64915d7fff8ff00180e70092"
+
+[[package]]
+name = "web-sys"
+version = "0.3.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dda38f4e5ca63eda02c059d243aa25b5f35ab98451e518c51612cd0f1bd19a47"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "webpki"
+version = "0.21.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1f50e1972865d6b1adb54167d1c8ed48606004c2c9d0ea5f1eeb34d95e863ef"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
+name = "webpki-roots"
+version = "0.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8eff4b7516a57307f9349c64bf34caa34b940b66fed4b2fb3136cb7386e5739"
+dependencies = [
+ "webpki",
+]
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -692,14 +2125,54 @@ dependencies = [
  "winapi-x86_64-pc-windows-gnu",
 ]
 
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
+
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winreg"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0120db82e8a1e0b9fb3345a539c478767c0048d842860994d96113d5b667bd69"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "ws2_32-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3cbac2ed2ba24cc90f5e06485ac8c7c1e5449fe8911aef4d8877218af021a5b8"
diff --git a/token-swap/Cargo.toml b/token-swap/Cargo.toml
index a2b11bb2f23eb9..e88e65ba92a1e5 100644
--- a/token-swap/Cargo.toml
+++ b/token-swap/Cargo.toml
@@ -9,16 +9,20 @@ authors = ["Solana Maintainers <maintainers@solana.foundation>"]
 repository = "https://github.com/solana-labs/solana-program-library"
 license = "Apache-2.0"
 edition = "2018"
+exclude = ["js/**"]
 
 [features]
+no-entrypoint = []
 skip-no-mangle = ["solana-sdk/skip-no-mangle"]
+program = ["solana-sdk/program", "spl-token/program", "spl-token/no-entrypoint"]
+default = ["solana-sdk/default", "spl-token/default"]
 
 [dependencies]
 num-derive = "0.2"
 num-traits = "0.2"
 remove_dir_all = "=0.5.0"
-solana-sdk = { version = "=1.2.13", default-features = false, features=["program"] }
-spl-token = { path = "../token" }
+solana-sdk = { version = "=1.2.13", default-features = false, optional = true }
+spl-token = { path = "../token", default-features = false, optional = true }
 thiserror = "1.0"
 
 [dev-dependencies]
diff --git a/token-swap/inc/token-swap.h b/token-swap/inc/token-swap.h
index 2b86cb67c4bef5..1d5f83f39e311f 100644
--- a/token-swap/inc/token-swap.h
+++ b/token-swap/inc/token-swap.h
@@ -117,21 +117,21 @@ typedef uint8_t TokenSwap_Pubkey[32];
  */
 typedef struct TokenSwap_SwapInfo {
     /**
-     * token A
+     * Token A
      * The Liquidity token is issued against this value.
      */
     TokenSwap_Pubkey token_a;
     /**
-     * token B
+     * Token B
      */
     TokenSwap_Pubkey token_b;
     /**
-     * pool tokens are issued when A or B tokens are deposited.
-     * pool tokens can be withdrawn back to the original A or B token.
+     * Pool tokens are issued when A or B tokens are deposited.
+     * Pool tokens can be withdrawn back to the original A or B token.
      */
     TokenSwap_Pubkey pool_mint;
     /**
-     * fee applied to the input token amount prior to output calculation.
+     * Fee applied to the input token amount prior to output calculation.
      */
     TokenSwap_Fee fee;
 } TokenSwap_SwapInfo;
diff --git a/token-swap/src/entrypoint.rs b/token-swap/src/entrypoint.rs
new file mode 100644
index 00000000000000..00ca3952985f7f
--- /dev/null
+++ b/token-swap/src/entrypoint.rs
@@ -0,0 +1,24 @@
+//! Program entrypoint definitions
+
+#![cfg(feature = "program")]
+#![cfg(not(feature = "no-entrypoint"))]
+
+use crate::{error::Error, state::State};
+use solana_sdk::{
+    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult,
+    program_error::PrintProgramError, pubkey::Pubkey,
+};
+
+entrypoint!(process_instruction);
+fn process_instruction<'a>(
+    program_id: &Pubkey,
+    accounts: &'a [AccountInfo<'a>],
+    instruction_data: &[u8],
+) -> ProgramResult {
+    if let Err(error) = State::process(program_id, accounts, instruction_data) {
+        // catch the error so we can print it
+        error.print::<Error>();
+        return Err(error);
+    }
+    Ok(())
+}
diff --git a/token-swap/src/error.rs b/token-swap/src/error.rs
index 1e495d77e9859c..7b7464a26a99dd 100644
--- a/token-swap/src/error.rs
+++ b/token-swap/src/error.rs
@@ -1,12 +1,7 @@
 //! Error types
 
 use num_derive::FromPrimitive;
-use num_traits::FromPrimitive;
-use solana_sdk::{
-    decode_error::DecodeError,
-    info,
-    program_error::{PrintProgramError, ProgramError},
-};
+use solana_sdk::{decode_error::DecodeError, program_error::ProgramError};
 use thiserror::Error;
 
 /// Errors that may be returned by the TokenSwap program.
@@ -56,23 +51,3 @@ impl<T> DecodeError<T> for Error {
         "Swap Error"
     }
 }
-impl PrintProgramError for Error {
-    fn print<E>(&self)
-    where
-        E: 'static + std::error::Error + DecodeError<E> + PrintProgramError + FromPrimitive,
-    {
-        match self {
-            Error::AlreadyInUse => info!("Error: AlreadyInUse"),
-            Error::InvalidProgramAddress => info!("Error: InvalidProgramAddress"),
-            Error::InvalidOwner => info!("Error: InvalidOwner"),
-            Error::ExpectedToken => info!("Error: ExpectedToken"),
-            Error::ExpectedAccount => info!("Error: ExpectedAccount"),
-            Error::InvalidSupply => info!("Error: InvalidSupply"),
-            Error::InvalidDelegate => info!("Error: InvalidDelegate"),
-            Error::InvalidState => info!("Error: InvalidState"),
-            Error::InvalidInput => info!("Error: InvalidInput"),
-            Error::InvalidOutput => info!("Error: InvalidOutput"),
-            Error::CalculationFailure => info!("Error: CalculationFailure"),
-        }
-    }
-}
diff --git a/token-swap/src/instruction.rs b/token-swap/src/instruction.rs
index 8fe5d099f7cf2c..88215172294169 100644
--- a/token-swap/src/instruction.rs
+++ b/token-swap/src/instruction.rs
@@ -1,7 +1,7 @@
-#![allow(clippy::too_many_arguments)]
-
 //! Instruction types
 
+#![allow(clippy::too_many_arguments)]
+
 use solana_sdk::{
     instruction::{AccountMeta, Instruction},
     program_error::ProgramError,
diff --git a/token-swap/src/lib.rs b/token-swap/src/lib.rs
index 3beb6990f7bc16..430d465f6be7b4 100644
--- a/token-swap/src/lib.rs
+++ b/token-swap/src/lib.rs
@@ -2,7 +2,14 @@
 
 //! An Uniswap-like program for the Solana blockchain.
 
+pub mod entrypoint;
 pub mod error;
 pub mod instruction;
 pub mod processor;
 pub mod state;
+
+// Export current solana-sdk types for downstream users who may also be building with a different
+// solana-sdk version
+pub use solana_sdk;
+
+solana_sdk::declare_id!("TokenSwap1111111111111111111111111111111111");
diff --git a/token-swap/src/processor.rs b/token-swap/src/processor.rs
index 221789ec8796dc..1be485da9da044 100644
--- a/token-swap/src/processor.rs
+++ b/token-swap/src/processor.rs
@@ -1,21 +1,631 @@
-//! Program entrypoint definitions
+//! Program state processor
 
-use crate::{error::Error, state::State};
+#![cfg(feature = "program")]
+
+use crate::{
+    error::Error,
+    instruction::{unpack, Fee, SwapInstruction},
+    state::{Invariant, State, SwapInfo},
+};
+use num_traits::FromPrimitive;
+#[cfg(not(target_arch = "bpf"))]
+use solana_sdk::instruction::Instruction;
+#[cfg(target_arch = "bpf")]
+use solana_sdk::program::invoke_signed;
 use solana_sdk::{
-    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult,
-    program_error::PrintProgramError, pubkey::Pubkey,
+    account_info::next_account_info, account_info::AccountInfo, decode_error::DecodeError,
+    entrypoint::ProgramResult, info, program_error::PrintProgramError, program_error::ProgramError,
+    pubkey::Pubkey,
 };
+use std::mem::size_of;
+
+impl State {
+    /// Deserializes a byte buffer into a [State](struct.State.html).
+    pub fn deserialize(input: &[u8]) -> Result<Self, ProgramError> {
+        if input.len() < size_of::<u8>() {
+            return Err(ProgramError::InvalidAccountData);
+        }
+        Ok(match input[0] {
+            0 => Self::Unallocated,
+            1 => {
+                let swap: &SwapInfo = unpack(input)?;
+                Self::Init(*swap)
+            }
+            _ => return Err(ProgramError::InvalidAccountData),
+        })
+    }
+
+    /// Serializes [State](struct.State.html) into a byte buffer.
+    pub fn serialize(self: &Self, output: &mut [u8]) -> ProgramResult {
+        if output.len() < size_of::<u8>() {
+            return Err(ProgramError::InvalidAccountData);
+        }
+        match self {
+            Self::Unallocated => output[0] = 0,
+            Self::Init(swap) => {
+                if output.len() < size_of::<u8>() + size_of::<SwapInfo>() {
+                    return Err(ProgramError::InvalidAccountData);
+                }
+                output[0] = 1;
+                #[allow(clippy::cast_ptr_alignment)]
+                let value = unsafe { &mut *(&mut output[1] as *mut u8 as *mut SwapInfo) };
+                *value = *swap;
+            }
+        }
+        Ok(())
+    }
+
+    /// Gets the `SwapInfo` from `State`
+    fn token_swap(&self) -> Result<SwapInfo, ProgramError> {
+        if let State::Init(swap) = &self {
+            Ok(*swap)
+        } else {
+            Err(Error::InvalidState.into())
+        }
+    }
+
+    /// Deserializes a spl_token `Account`.
+    pub fn token_account_deserialize(
+        info: &AccountInfo,
+    ) -> Result<spl_token::state::Account, Error> {
+        Ok(*spl_token::state::unpack(&mut info.data.borrow_mut())
+            .map_err(|_| Error::ExpectedAccount)?)
+    }
+
+    /// Deserializes a spl_token `Mint`.
+    pub fn mint_deserialize(info: &AccountInfo) -> Result<spl_token::state::Mint, Error> {
+        Ok(*spl_token::state::unpack(&mut info.data.borrow_mut())
+            .map_err(|_| Error::ExpectedToken)?)
+    }
+
+    /// Calculates the authority id by generating a program address.
+    pub fn authority_id(program_id: &Pubkey, my_info: &Pubkey) -> Result<Pubkey, Error> {
+        Pubkey::create_program_address(&[&my_info.to_string()[..32]], program_id)
+            .or(Err(Error::InvalidProgramAddress))
+    }
+    /// Issue a spl_token `Burn` instruction.
+    pub fn token_burn(
+        accounts: &[AccountInfo],
+        token_program_id: &Pubkey,
+        swap: &Pubkey,
+        burn_account: &Pubkey,
+        authority: &Pubkey,
+        amount: u64,
+    ) -> Result<(), ProgramError> {
+        let swap_string = swap.to_string();
+        let signers = &[&[&swap_string[..32]][..]];
+        let ix =
+            spl_token::instruction::burn(token_program_id, burn_account, authority, &[], amount)?;
+        invoke_signed(&ix, accounts, signers)
+    }
+
+    /// Issue a spl_token `MintTo` instruction.
+    pub fn token_mint_to(
+        accounts: &[AccountInfo],
+        token_program_id: &Pubkey,
+        swap: &Pubkey,
+        mint: &Pubkey,
+        destination: &Pubkey,
+        authority: &Pubkey,
+        amount: u64,
+    ) -> Result<(), ProgramError> {
+        let swap_string = swap.to_string();
+        let signers = &[&[&swap_string[..32]][..]];
+        let ix = spl_token::instruction::mint_to(
+            token_program_id,
+            mint,
+            destination,
+            authority,
+            &[],
+            amount,
+        )?;
+        invoke_signed(&ix, accounts, signers)
+    }
+
+    /// Issue a spl_token `Transfer` instruction.
+    pub fn token_transfer(
+        accounts: &[AccountInfo],
+        token_program_id: &Pubkey,
+        swap: &Pubkey,
+        source: &Pubkey,
+        destination: &Pubkey,
+        authority: &Pubkey,
+        amount: u64,
+    ) -> Result<(), ProgramError> {
+        let swap_string = swap.to_string();
+        let signers = &[&[&swap_string[..32]][..]];
+        let ix = spl_token::instruction::transfer(
+            token_program_id,
+            source,
+            destination,
+            authority,
+            &[],
+            amount,
+        )?;
+        invoke_signed(&ix, accounts, signers)
+    }
+
+    /// Processes an [Initialize](enum.Instruction.html).
+    pub fn process_initialize(
+        program_id: &Pubkey,
+        fee: Fee,
+        accounts: &[AccountInfo],
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let swap_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+        let token_a_info = next_account_info(account_info_iter)?;
+        let token_b_info = next_account_info(account_info_iter)?;
+        let pool_info = next_account_info(account_info_iter)?;
+        let user_output_info = next_account_info(account_info_iter)?;
+        let token_program_info = next_account_info(account_info_iter)?;
+
+        if State::Unallocated != State::deserialize(&swap_info.data.borrow())? {
+            return Err(Error::AlreadyInUse.into());
+        }
+
+        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
+            return Err(Error::InvalidProgramAddress.into());
+        }
+        let token_a = Self::token_account_deserialize(token_a_info)?;
+        let token_b = Self::token_account_deserialize(token_b_info)?;
+        let pool_mint = Self::mint_deserialize(pool_info)?;
+        if *authority_info.key != token_a.owner {
+            return Err(Error::InvalidOwner.into());
+        }
+        if *authority_info.key != token_b.owner {
+            return Err(Error::InvalidOwner.into());
+        }
+        if spl_token::option::COption::Some(*authority_info.key) != pool_mint.owner {
+            return Err(Error::InvalidOwner.into());
+        }
+        if token_b.amount == 0 {
+            return Err(Error::InvalidSupply.into());
+        }
+        if token_a.amount == 0 {
+            return Err(Error::InvalidSupply.into());
+        }
+        if token_a.delegate.is_some() {
+            return Err(Error::InvalidDelegate.into());
+        }
+        if token_b.delegate.is_some() {
+            return Err(Error::InvalidDelegate.into());
+        }
+
+        // liquidity is measured in terms of token_a's value since both sides of
+        // the pool are equal
+        let amount = token_a.amount;
+        Self::token_mint_to(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            pool_info.key,
+            user_output_info.key,
+            authority_info.key,
+            amount,
+        )?;
+
+        let obj = State::Init(SwapInfo {
+            token_a: *token_a_info.key,
+            token_b: *token_b_info.key,
+            pool_mint: *pool_info.key,
+            fee,
+        });
+        obj.serialize(&mut swap_info.data.borrow_mut())
+    }
+
+    /// Processes an [Swap](enum.Instruction.html).
+    pub fn process_swap(
+        program_id: &Pubkey,
+        amount: u64,
+        accounts: &[AccountInfo],
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let swap_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+        let source_info = next_account_info(account_info_iter)?;
+        let into_info = next_account_info(account_info_iter)?;
+        let from_info = next_account_info(account_info_iter)?;
+        let dest_info = next_account_info(account_info_iter)?;
+        let token_program_info = next_account_info(account_info_iter)?;
+
+        let token_swap = Self::deserialize(&swap_info.data.borrow())?.token_swap()?;
+
+        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
+            return Err(Error::InvalidProgramAddress.into());
+        }
+        if !(*into_info.key == token_swap.token_a || *into_info.key == token_swap.token_b) {
+            return Err(Error::InvalidInput.into());
+        }
+        if !(*from_info.key == token_swap.token_a || *from_info.key == token_swap.token_b) {
+            return Err(Error::InvalidOutput.into());
+        }
+        if *into_info.key == *from_info.key {
+            return Err(Error::InvalidInput.into());
+        }
+        let into_token = Self::token_account_deserialize(into_info)?;
+        let from_token = Self::token_account_deserialize(from_info)?;
+        let mut invariant = Invariant {
+            token_a: into_token.amount,
+            token_b: from_token.amount,
+            fee: token_swap.fee,
+        };
+        let output = invariant
+            .swap(amount)
+            .ok_or_else(|| Error::CalculationFailure)?;
+        Self::token_transfer(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            source_info.key,
+            into_info.key,
+            authority_info.key,
+            amount,
+        )?;
+        Self::token_transfer(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            from_info.key,
+            dest_info.key,
+            authority_info.key,
+            output,
+        )?;
+        Ok(())
+    }
+    /// Processes an [Deposit](enum.Instruction.html).
+    pub fn process_deposit(
+        program_id: &Pubkey,
+        a_amount: u64,
+        accounts: &[AccountInfo],
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let swap_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+        let source_a_info = next_account_info(account_info_iter)?;
+        let source_b_info = next_account_info(account_info_iter)?;
+        let token_a_info = next_account_info(account_info_iter)?;
+        let token_b_info = next_account_info(account_info_iter)?;
+        let pool_info = next_account_info(account_info_iter)?;
+        let dest_info = next_account_info(account_info_iter)?;
+        let token_program_info = next_account_info(account_info_iter)?;
+
+        let token_swap = Self::deserialize(&swap_info.data.borrow())?.token_swap()?;
+        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
+            return Err(Error::InvalidProgramAddress.into());
+        }
+        if *token_a_info.key != token_swap.token_a {
+            return Err(Error::InvalidInput.into());
+        }
+        if *token_b_info.key != token_swap.token_b {
+            return Err(Error::InvalidInput.into());
+        }
+        if *pool_info.key != token_swap.pool_mint {
+            return Err(Error::InvalidInput.into());
+        }
+        let token_a = Self::token_account_deserialize(token_a_info)?;
+        let token_b = Self::token_account_deserialize(token_b_info)?;
+
+        let invariant = Invariant {
+            token_a: token_a.amount,
+            token_b: token_b.amount,
+            fee: token_swap.fee,
+        };
+        let b_amount = invariant
+            .exchange_rate(a_amount)
+            .ok_or_else(|| Error::CalculationFailure)?;
+
+        // liquidity is measured in terms of token_a's value
+        // since both sides of the pool are equal
+        let output = a_amount;
+
+        Self::token_transfer(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            source_a_info.key,
+            token_a_info.key,
+            authority_info.key,
+            a_amount,
+        )?;
+        Self::token_transfer(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            source_b_info.key,
+            token_b_info.key,
+            authority_info.key,
+            b_amount,
+        )?;
+        Self::token_mint_to(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            pool_info.key,
+            dest_info.key,
+            authority_info.key,
+            output,
+        )?;
 
-entrypoint!(process_instruction);
-fn process_instruction<'a>(
-    program_id: &Pubkey,
-    accounts: &'a [AccountInfo<'a>],
-    instruction_data: &[u8],
+        Ok(())
+    }
+
+    /// Processes an [Withdraw](enum.Instruction.html).
+    pub fn process_withdraw(
+        program_id: &Pubkey,
+        amount: u64,
+        accounts: &[AccountInfo],
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let swap_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+        let source_info = next_account_info(account_info_iter)?;
+        let token_a_info = next_account_info(account_info_iter)?;
+        let token_b_info = next_account_info(account_info_iter)?;
+        let dest_token_a_info = next_account_info(account_info_iter)?;
+        let dest_token_b_info = next_account_info(account_info_iter)?;
+        let token_program_info = next_account_info(account_info_iter)?;
+
+        let token_swap = Self::deserialize(&swap_info.data.borrow())?.token_swap()?;
+        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
+            return Err(Error::InvalidProgramAddress.into());
+        }
+        if *token_a_info.key != token_swap.token_a {
+            return Err(Error::InvalidInput.into());
+        }
+        if *token_b_info.key != token_swap.token_b {
+            return Err(Error::InvalidInput.into());
+        }
+
+        let token_a = Self::token_account_deserialize(token_a_info)?;
+        let token_b = Self::token_account_deserialize(token_b_info)?;
+
+        let invariant = Invariant {
+            token_a: token_a.amount,
+            token_b: token_b.amount,
+            fee: token_swap.fee,
+        };
+
+        let a_amount = amount;
+        let b_amount = invariant
+            .exchange_rate(a_amount)
+            .ok_or_else(|| Error::CalculationFailure)?;
+
+        Self::token_transfer(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            token_a_info.key,
+            dest_token_a_info.key,
+            authority_info.key,
+            a_amount,
+        )?;
+        Self::token_transfer(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            token_b_info.key,
+            dest_token_b_info.key,
+            authority_info.key,
+            b_amount,
+        )?;
+        Self::token_burn(
+            accounts,
+            token_program_info.key,
+            swap_info.key,
+            source_info.key,
+            authority_info.key,
+            amount,
+        )?;
+        Ok(())
+    }
+    /// Processes an [Instruction](enum.Instruction.html).
+    pub fn process(program_id: &Pubkey, accounts: &[AccountInfo], input: &[u8]) -> ProgramResult {
+        let instruction = SwapInstruction::deserialize(input)?;
+        match instruction {
+            SwapInstruction::Initialize(fee) => {
+                info!("Instruction: Init");
+                Self::process_initialize(program_id, fee, accounts)
+            }
+            SwapInstruction::Swap(amount) => {
+                info!("Instruction: Swap");
+                Self::process_swap(program_id, amount, accounts)
+            }
+            SwapInstruction::Deposit(amount) => {
+                info!("Instruction: Deposit");
+                Self::process_deposit(program_id, amount, accounts)
+            }
+            SwapInstruction::Withdraw(amount) => {
+                info!("Instruction: Withdraw");
+                Self::process_withdraw(program_id, amount, accounts)
+            }
+        }
+    }
+}
+
+// Test program id for the swap program.
+#[cfg(not(target_arch = "bpf"))]
+const SWAP_PROGRAM_ID: Pubkey = Pubkey::new_from_array([2u8; 32]);
+
+/// Routes invokes to the token program, used for testing.
+#[cfg(not(target_arch = "bpf"))]
+pub fn invoke_signed<'a>(
+    instruction: &Instruction,
+    account_infos: &[AccountInfo<'a>],
+    signers_seeds: &[&[&str]],
 ) -> ProgramResult {
-    if let Err(error) = State::process(program_id, accounts, instruction_data) {
-        // catch the error so we can print it
-        error.print::<Error>();
-        return Err(error);
+    let mut new_account_infos = vec![];
+    for meta in instruction.accounts.iter() {
+        for account_info in account_infos.iter() {
+            if meta.pubkey == *account_info.key {
+                let mut new_account_info = account_info.clone();
+                for seeds in signers_seeds.iter() {
+                    let signer = Pubkey::create_program_address(seeds, &SWAP_PROGRAM_ID).unwrap();
+                    if *account_info.key == signer {
+                        new_account_info.is_signer = true;
+                    }
+                }
+                new_account_infos.push(new_account_info);
+            }
+        }
+    }
+    spl_token::processor::Processor::process(
+        &instruction.program_id,
+        &new_account_infos,
+        &instruction.data,
+    )
+}
+
+impl PrintProgramError for Error {
+    fn print<E>(&self)
+    where
+        E: 'static + std::error::Error + DecodeError<E> + PrintProgramError + FromPrimitive,
+    {
+        match self {
+            Error::AlreadyInUse => info!("Error: AlreadyInUse"),
+            Error::InvalidProgramAddress => info!("Error: InvalidProgramAddress"),
+            Error::InvalidOwner => info!("Error: InvalidOwner"),
+            Error::ExpectedToken => info!("Error: ExpectedToken"),
+            Error::ExpectedAccount => info!("Error: ExpectedAccount"),
+            Error::InvalidSupply => info!("Error: InvalidSupply"),
+            Error::InvalidDelegate => info!("Error: InvalidDelegate"),
+            Error::InvalidState => info!("Error: InvalidState"),
+            Error::InvalidInput => info!("Error: InvalidInput"),
+            Error::InvalidOutput => info!("Error: InvalidOutput"),
+            Error::CalculationFailure => info!("Error: CalculationFailure"),
+        }
+    }
+}
+
+// Pull in syscall stubs when building for non-BPF targets
+#[cfg(not(target_arch = "bpf"))]
+solana_sdk::program_stubs!();
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::instruction::initialize;
+    use solana_sdk::{
+        account::Account, account_info::create_is_signer_account_infos, instruction::Instruction,
+    };
+    use spl_token::{
+        instruction::{initialize_account, initialize_mint},
+        processor::Processor as SplProcessor,
+        state::{Account as SplAccount, Mint as SplMint},
+    };
+
+    const TOKEN_PROGRAM_ID: Pubkey = Pubkey::new_from_array([1u8; 32]);
+
+    fn pubkey_rand() -> Pubkey {
+        Pubkey::new(&rand::random::<[u8; 32]>())
+    }
+
+    fn do_process_instruction(
+        instruction: Instruction,
+        accounts: Vec<&mut Account>,
+    ) -> ProgramResult {
+        let mut meta = instruction
+            .accounts
+            .iter()
+            .zip(accounts)
+            .map(|(account_meta, account)| (&account_meta.pubkey, account_meta.is_signer, account))
+            .collect::<Vec<_>>();
+
+        let account_infos = create_is_signer_account_infos(&mut meta);
+        if instruction.program_id == SWAP_PROGRAM_ID {
+            State::process(&instruction.program_id, &account_infos, &instruction.data)
+        } else {
+            SplProcessor::process(&instruction.program_id, &account_infos, &instruction.data)
+        }
+    }
+
+    fn mint_token(
+        program_id: &Pubkey,
+        authority_key: &Pubkey,
+        amount: u64,
+    ) -> ((Pubkey, Account), (Pubkey, Account)) {
+        let token_key = pubkey_rand();
+        let mut token_account = Account::new(0, size_of::<SplMint>(), &program_id);
+        let account_key = pubkey_rand();
+        let mut account_account = Account::new(0, size_of::<SplAccount>(), &program_id);
+
+        // create pool and pool account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &token_key, &authority_key).unwrap(),
+            vec![
+                &mut account_account,
+                &mut Account::default(),
+                &mut token_account,
+            ],
+        )
+        .unwrap();
+        let mut authority_account = Account::default();
+        do_process_instruction(
+            initialize_mint(
+                &program_id,
+                &token_key,
+                Some(&account_key),
+                Some(&authority_key),
+                amount,
+                2,
+            )
+            .unwrap(),
+            if amount == 0 {
+                vec![&mut token_account, &mut authority_account]
+            } else {
+                vec![
+                    &mut token_account,
+                    &mut account_account,
+                    &mut authority_account,
+                ]
+            },
+        )
+        .unwrap();
+
+        return ((token_key, token_account), (account_key, account_account));
+    }
+
+    #[test]
+    fn test_initialize() {
+        let swap_key = pubkey_rand();
+        let mut swap_account = Account::new(0, size_of::<State>(), &SWAP_PROGRAM_ID);
+        let authority_key = State::authority_id(&SWAP_PROGRAM_ID, &swap_key).unwrap();
+        let mut authority_account = Account::default();
+
+        let ((pool_key, mut pool_account), (pool_token_key, mut pool_token_account)) =
+            mint_token(&TOKEN_PROGRAM_ID, &authority_key, 0);
+        let ((_token_a_mint_key, mut _token_a_mint_account), (token_a_key, mut token_a_account)) =
+            mint_token(&TOKEN_PROGRAM_ID, &authority_key, 1000);
+        let ((_token_b_mint_key, mut _token_b_mint_account), (token_b_key, mut token_b_account)) =
+            mint_token(&TOKEN_PROGRAM_ID, &authority_key, 1000);
+
+        // Swap Init
+        do_process_instruction(
+            initialize(
+                &SWAP_PROGRAM_ID,
+                &TOKEN_PROGRAM_ID,
+                &swap_key,
+                &authority_key,
+                &token_a_key,
+                &token_b_key,
+                &pool_key,
+                &pool_token_key,
+                Fee {
+                    denominator: 1,
+                    numerator: 2,
+                },
+            )
+            .unwrap(),
+            vec![
+                &mut swap_account,
+                &mut authority_account,
+                &mut token_a_account,
+                &mut token_b_account,
+                &mut pool_account,
+                &mut pool_token_account,
+                &mut Account::default(),
+            ],
+        )
+        .unwrap();
     }
-    Ok(())
 }
diff --git a/token-swap/src/state.rs b/token-swap/src/state.rs
index 3d12d5ec0c91b9..c2d0b28b819749 100644
--- a/token-swap/src/state.rs
+++ b/token-swap/src/state.rs
@@ -1,33 +1,22 @@
 //! State transition types
 
-use crate::{
-    error::Error,
-    instruction::{unpack, Fee, SwapInstruction},
-};
-#[cfg(not(target_arch = "bpf"))]
-use solana_sdk::instruction::Instruction;
-#[cfg(target_arch = "bpf")]
-use solana_sdk::program::invoke_signed;
-use solana_sdk::{
-    account_info::next_account_info, account_info::AccountInfo, entrypoint::ProgramResult, info,
-    program_error::ProgramError, pubkey::Pubkey,
-};
-use std::mem::size_of;
+use crate::instruction::Fee;
+use solana_sdk::pubkey::Pubkey;
 
 /// Initialized program details.
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq)]
 pub struct SwapInfo {
-    /// token A
+    /// Token A
     /// The Liquidity token is issued against this value.
-    token_a: Pubkey,
-    /// token B
-    token_b: Pubkey,
-    /// pool tokens are issued when A or B tokens are deposited.
-    /// pool tokens can be withdrawn back to the original A or B token.
-    pool_mint: Pubkey,
-    /// fee applied to the input token amount prior to output calculation.
-    fee: Fee,
+    pub token_a: Pubkey,
+    /// Token B
+    pub token_b: Pubkey,
+    /// Pool tokens are issued when A or B tokens are deposited.
+    /// Pool tokens can be withdrawn back to the original A or B token.
+    pub pool_mint: Pubkey,
+    /// Fee applied to the input token amount prior to output calculation.
+    pub fee: Fee,
 }
 
 /// Program states.
@@ -41,13 +30,17 @@ pub enum State {
 }
 
 /// The Uniswap invariant calculator.
-struct Invariant {
-    token_a: u64,
-    token_b: u64,
-    fee: Fee,
+pub struct Invariant {
+    /// Token A
+    pub token_a: u64,
+    /// Token B
+    pub token_b: u64,
+    /// Fee
+    pub fee: Fee,
 }
 impl Invariant {
-    fn swap(&mut self, token_a: u64) -> Option<u64> {
+    /// Swap
+    pub fn swap(&mut self, token_a: u64) -> Option<u64> {
         let invariant = self.token_a.checked_mul(self.token_b)?;
         let new_a = self.token_a.checked_add(token_a)?;
         let new_b = invariant.checked_div(new_a)?;
@@ -61,600 +54,8 @@ impl Invariant {
         self.token_b = new_b_with_fee;
         Some(remove_less_fee)
     }
-    fn exchange_rate(&self, token_a: u64) -> Option<u64> {
+    /// Exchange rate
+    pub fn exchange_rate(&self, token_a: u64) -> Option<u64> {
         token_a.checked_mul(self.token_b)?.checked_div(self.token_a)
     }
 }
-
-impl State {
-    /// Deserializes a byte buffer into a [State](struct.State.html).
-    pub fn deserialize(input: &[u8]) -> Result<Self, ProgramError> {
-        if input.len() < size_of::<u8>() {
-            return Err(ProgramError::InvalidAccountData);
-        }
-        Ok(match input[0] {
-            0 => Self::Unallocated,
-            1 => {
-                let swap: &SwapInfo = unpack(input)?;
-                Self::Init(*swap)
-            }
-            _ => return Err(ProgramError::InvalidAccountData),
-        })
-    }
-
-    /// Serializes [State](struct.State.html) into a byte buffer.
-    pub fn serialize(self: &Self, output: &mut [u8]) -> ProgramResult {
-        if output.len() < size_of::<u8>() {
-            return Err(ProgramError::InvalidAccountData);
-        }
-        match self {
-            Self::Unallocated => output[0] = 0,
-            Self::Init(swap) => {
-                if output.len() < size_of::<u8>() + size_of::<SwapInfo>() {
-                    return Err(ProgramError::InvalidAccountData);
-                }
-                output[0] = 1;
-                #[allow(clippy::cast_ptr_alignment)]
-                let value = unsafe { &mut *(&mut output[1] as *mut u8 as *mut SwapInfo) };
-                *value = *swap;
-            }
-        }
-        Ok(())
-    }
-
-    /// Gets the `SwapInfo` from `State`
-    fn token_swap(&self) -> Result<SwapInfo, ProgramError> {
-        if let State::Init(swap) = &self {
-            Ok(*swap)
-        } else {
-            Err(Error::InvalidState.into())
-        }
-    }
-
-    /// Deserializes a spl_token `Account`.
-    pub fn token_account_deserialize(
-        info: &AccountInfo,
-    ) -> Result<spl_token::state::Account, Error> {
-        Ok(
-            *spl_token::state::State::unpack(&mut info.data.borrow_mut())
-                .map_err(|_| Error::ExpectedAccount)?,
-        )
-    }
-
-    /// Deserializes a spl_token `Mint`.
-    pub fn mint_deserialize(info: &AccountInfo) -> Result<spl_token::state::Mint, Error> {
-        Ok(
-            *spl_token::state::State::unpack(&mut info.data.borrow_mut())
-                .map_err(|_| Error::ExpectedToken)?,
-        )
-    }
-
-    /// Calculates the authority id by generating a program address.
-    pub fn authority_id(program_id: &Pubkey, my_info: &Pubkey) -> Result<Pubkey, Error> {
-        Pubkey::create_program_address(&[&my_info.to_string()[..32]], program_id)
-            .or(Err(Error::InvalidProgramAddress))
-    }
-    /// Issue a spl_token `Burn` instruction.
-    pub fn token_burn(
-        accounts: &[AccountInfo],
-        token_program_id: &Pubkey,
-        swap: &Pubkey,
-        burn_account: &Pubkey,
-        authority: &Pubkey,
-        amount: u64,
-    ) -> Result<(), ProgramError> {
-        let swap_string = swap.to_string();
-        let signers = &[&[&swap_string[..32]][..]];
-        let ix =
-            spl_token::instruction::burn(token_program_id, burn_account, authority, &[], amount)?;
-        invoke_signed(&ix, accounts, signers)
-    }
-
-    /// Issue a spl_token `MintTo` instruction.
-    pub fn token_mint_to(
-        accounts: &[AccountInfo],
-        token_program_id: &Pubkey,
-        swap: &Pubkey,
-        mint: &Pubkey,
-        destination: &Pubkey,
-        authority: &Pubkey,
-        amount: u64,
-    ) -> Result<(), ProgramError> {
-        let swap_string = swap.to_string();
-        let signers = &[&[&swap_string[..32]][..]];
-        let ix = spl_token::instruction::mint_to(
-            token_program_id,
-            mint,
-            destination,
-            authority,
-            &[],
-            amount,
-        )?;
-        invoke_signed(&ix, accounts, signers)
-    }
-
-    /// Issue a spl_token `Transfer` instruction.
-    pub fn token_transfer(
-        accounts: &[AccountInfo],
-        token_program_id: &Pubkey,
-        swap: &Pubkey,
-        source: &Pubkey,
-        destination: &Pubkey,
-        authority: &Pubkey,
-        amount: u64,
-    ) -> Result<(), ProgramError> {
-        let swap_string = swap.to_string();
-        let signers = &[&[&swap_string[..32]][..]];
-        let ix = spl_token::instruction::transfer(
-            token_program_id,
-            source,
-            destination,
-            authority,
-            &[],
-            amount,
-        )?;
-        invoke_signed(&ix, accounts, signers)
-    }
-
-    /// Processes an [Initialize](enum.Instruction.html).
-    pub fn process_initialize(
-        program_id: &Pubkey,
-        fee: Fee,
-        accounts: &[AccountInfo],
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let swap_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-        let token_a_info = next_account_info(account_info_iter)?;
-        let token_b_info = next_account_info(account_info_iter)?;
-        let pool_info = next_account_info(account_info_iter)?;
-        let user_output_info = next_account_info(account_info_iter)?;
-        let token_program_info = next_account_info(account_info_iter)?;
-
-        if State::Unallocated != State::deserialize(&swap_info.data.borrow())? {
-            return Err(Error::AlreadyInUse.into());
-        }
-
-        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
-            return Err(Error::InvalidProgramAddress.into());
-        }
-        let token_a = Self::token_account_deserialize(token_a_info)?;
-        let token_b = Self::token_account_deserialize(token_b_info)?;
-        let pool_mint = Self::mint_deserialize(pool_info)?;
-        if *authority_info.key != token_a.owner {
-            return Err(Error::InvalidOwner.into());
-        }
-        if *authority_info.key != token_b.owner {
-            return Err(Error::InvalidOwner.into());
-        }
-        if spl_token::option::COption::Some(*authority_info.key) != pool_mint.owner {
-            return Err(Error::InvalidOwner.into());
-        }
-        if token_b.amount == 0 {
-            return Err(Error::InvalidSupply.into());
-        }
-        if token_a.amount == 0 {
-            return Err(Error::InvalidSupply.into());
-        }
-        if token_a.delegate.is_some() {
-            return Err(Error::InvalidDelegate.into());
-        }
-        if token_b.delegate.is_some() {
-            return Err(Error::InvalidDelegate.into());
-        }
-
-        // liquidity is measured in terms of token_a's value since both sides of
-        // the pool are equal
-        let amount = token_a.amount;
-        Self::token_mint_to(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            pool_info.key,
-            user_output_info.key,
-            authority_info.key,
-            amount,
-        )?;
-
-        let obj = State::Init(SwapInfo {
-            token_a: *token_a_info.key,
-            token_b: *token_b_info.key,
-            pool_mint: *pool_info.key,
-            fee,
-        });
-        obj.serialize(&mut swap_info.data.borrow_mut())
-    }
-
-    /// Processes an [Swap](enum.Instruction.html).
-    pub fn process_swap(
-        program_id: &Pubkey,
-        amount: u64,
-        accounts: &[AccountInfo],
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let swap_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-        let source_info = next_account_info(account_info_iter)?;
-        let into_info = next_account_info(account_info_iter)?;
-        let from_info = next_account_info(account_info_iter)?;
-        let dest_info = next_account_info(account_info_iter)?;
-        let token_program_info = next_account_info(account_info_iter)?;
-
-        let token_swap = Self::deserialize(&swap_info.data.borrow())?.token_swap()?;
-
-        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
-            return Err(Error::InvalidProgramAddress.into());
-        }
-        if !(*into_info.key == token_swap.token_a || *into_info.key == token_swap.token_b) {
-            return Err(Error::InvalidInput.into());
-        }
-        if !(*from_info.key == token_swap.token_a || *from_info.key == token_swap.token_b) {
-            return Err(Error::InvalidOutput.into());
-        }
-        if *into_info.key == *from_info.key {
-            return Err(Error::InvalidInput.into());
-        }
-        let into_token = Self::token_account_deserialize(into_info)?;
-        let from_token = Self::token_account_deserialize(from_info)?;
-        let mut invariant = Invariant {
-            token_a: into_token.amount,
-            token_b: from_token.amount,
-            fee: token_swap.fee,
-        };
-        let output = invariant
-            .swap(amount)
-            .ok_or_else(|| Error::CalculationFailure)?;
-        Self::token_transfer(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            source_info.key,
-            into_info.key,
-            authority_info.key,
-            amount,
-        )?;
-        Self::token_transfer(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            from_info.key,
-            dest_info.key,
-            authority_info.key,
-            output,
-        )?;
-        Ok(())
-    }
-    /// Processes an [Deposit](enum.Instruction.html).
-    pub fn process_deposit(
-        program_id: &Pubkey,
-        a_amount: u64,
-        accounts: &[AccountInfo],
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let swap_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-        let source_a_info = next_account_info(account_info_iter)?;
-        let source_b_info = next_account_info(account_info_iter)?;
-        let token_a_info = next_account_info(account_info_iter)?;
-        let token_b_info = next_account_info(account_info_iter)?;
-        let pool_info = next_account_info(account_info_iter)?;
-        let dest_info = next_account_info(account_info_iter)?;
-        let token_program_info = next_account_info(account_info_iter)?;
-
-        let token_swap = Self::deserialize(&swap_info.data.borrow())?.token_swap()?;
-        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
-            return Err(Error::InvalidProgramAddress.into());
-        }
-        if *token_a_info.key != token_swap.token_a {
-            return Err(Error::InvalidInput.into());
-        }
-        if *token_b_info.key != token_swap.token_b {
-            return Err(Error::InvalidInput.into());
-        }
-        if *pool_info.key != token_swap.pool_mint {
-            return Err(Error::InvalidInput.into());
-        }
-        let token_a = Self::token_account_deserialize(token_a_info)?;
-        let token_b = Self::token_account_deserialize(token_b_info)?;
-
-        let invariant = Invariant {
-            token_a: token_a.amount,
-            token_b: token_b.amount,
-            fee: token_swap.fee,
-        };
-        let b_amount = invariant
-            .exchange_rate(a_amount)
-            .ok_or_else(|| Error::CalculationFailure)?;
-
-        // liquidity is measured in terms of token_a's value
-        // since both sides of the pool are equal
-        let output = a_amount;
-
-        Self::token_transfer(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            source_a_info.key,
-            token_a_info.key,
-            authority_info.key,
-            a_amount,
-        )?;
-        Self::token_transfer(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            source_b_info.key,
-            token_b_info.key,
-            authority_info.key,
-            b_amount,
-        )?;
-        Self::token_mint_to(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            pool_info.key,
-            dest_info.key,
-            authority_info.key,
-            output,
-        )?;
-
-        Ok(())
-    }
-
-    /// Processes an [Withdraw](enum.Instruction.html).
-    pub fn process_withdraw(
-        program_id: &Pubkey,
-        amount: u64,
-        accounts: &[AccountInfo],
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let swap_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-        let source_info = next_account_info(account_info_iter)?;
-        let token_a_info = next_account_info(account_info_iter)?;
-        let token_b_info = next_account_info(account_info_iter)?;
-        let dest_token_a_info = next_account_info(account_info_iter)?;
-        let dest_token_b_info = next_account_info(account_info_iter)?;
-        let token_program_info = next_account_info(account_info_iter)?;
-
-        let token_swap = Self::deserialize(&swap_info.data.borrow())?.token_swap()?;
-        if *authority_info.key != Self::authority_id(program_id, swap_info.key)? {
-            return Err(Error::InvalidProgramAddress.into());
-        }
-        if *token_a_info.key != token_swap.token_a {
-            return Err(Error::InvalidInput.into());
-        }
-        if *token_b_info.key != token_swap.token_b {
-            return Err(Error::InvalidInput.into());
-        }
-
-        let token_a = Self::token_account_deserialize(token_a_info)?;
-        let token_b = Self::token_account_deserialize(token_b_info)?;
-
-        let invariant = Invariant {
-            token_a: token_a.amount,
-            token_b: token_b.amount,
-            fee: token_swap.fee,
-        };
-
-        let a_amount = amount;
-        let b_amount = invariant
-            .exchange_rate(a_amount)
-            .ok_or_else(|| Error::CalculationFailure)?;
-
-        Self::token_transfer(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            token_a_info.key,
-            dest_token_a_info.key,
-            authority_info.key,
-            a_amount,
-        )?;
-        Self::token_transfer(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            token_b_info.key,
-            dest_token_b_info.key,
-            authority_info.key,
-            b_amount,
-        )?;
-        Self::token_burn(
-            accounts,
-            token_program_info.key,
-            swap_info.key,
-            source_info.key,
-            authority_info.key,
-            amount,
-        )?;
-        Ok(())
-    }
-    /// Processes an [Instruction](enum.Instruction.html).
-    pub fn process(program_id: &Pubkey, accounts: &[AccountInfo], input: &[u8]) -> ProgramResult {
-        let instruction = SwapInstruction::deserialize(input)?;
-        match instruction {
-            SwapInstruction::Initialize(fee) => {
-                info!("Instruction: Init");
-                Self::process_initialize(program_id, fee, accounts)
-            }
-            SwapInstruction::Swap(amount) => {
-                info!("Instruction: Swap");
-                Self::process_swap(program_id, amount, accounts)
-            }
-            SwapInstruction::Deposit(amount) => {
-                info!("Instruction: Deposit");
-                Self::process_deposit(program_id, amount, accounts)
-            }
-            SwapInstruction::Withdraw(amount) => {
-                info!("Instruction: Withdraw");
-                Self::process_withdraw(program_id, amount, accounts)
-            }
-        }
-    }
-}
-
-// Test program id for the swap program.
-#[cfg(not(target_arch = "bpf"))]
-const SWAP_PROGRAM_ID: Pubkey = Pubkey::new_from_array([2u8; 32]);
-
-/// Routes invokes to the token program, used for testing.
-#[cfg(not(target_arch = "bpf"))]
-pub fn invoke_signed<'a>(
-    instruction: &Instruction,
-    account_infos: &[AccountInfo<'a>],
-    signers_seeds: &[&[&str]],
-) -> ProgramResult {
-    let mut new_account_infos = vec![];
-    for meta in instruction.accounts.iter() {
-        for account_info in account_infos.iter() {
-            if meta.pubkey == *account_info.key {
-                let mut new_account_info = account_info.clone();
-                for seeds in signers_seeds.iter() {
-                    let signer = Pubkey::create_program_address(seeds, &SWAP_PROGRAM_ID).unwrap();
-                    if *account_info.key == signer {
-                        new_account_info.is_signer = true;
-                    }
-                }
-                new_account_infos.push(new_account_info);
-            }
-        }
-    }
-    spl_token::state::State::process(
-        &instruction.program_id,
-        &new_account_infos,
-        &instruction.data,
-    )
-}
-
-// Pull in syscall stubs when building for non-BPF targets
-#[cfg(not(target_arch = "bpf"))]
-solana_sdk::program_stubs!();
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::instruction::initialize;
-    use solana_sdk::{
-        account::Account, account_info::create_is_signer_account_infos, instruction::Instruction,
-    };
-    use spl_token::{
-        instruction::{initialize_account, initialize_mint},
-        state::{Account as SplAccount, Mint as SplMint, State as SplState},
-    };
-
-    const TOKEN_PROGRAM_ID: Pubkey = Pubkey::new_from_array([1u8; 32]);
-
-    fn pubkey_rand() -> Pubkey {
-        Pubkey::new(&rand::random::<[u8; 32]>())
-    }
-
-    fn do_process_instruction(
-        instruction: Instruction,
-        accounts: Vec<&mut Account>,
-    ) -> ProgramResult {
-        let mut meta = instruction
-            .accounts
-            .iter()
-            .zip(accounts)
-            .map(|(account_meta, account)| (&account_meta.pubkey, account_meta.is_signer, account))
-            .collect::<Vec<_>>();
-
-        let account_infos = create_is_signer_account_infos(&mut meta);
-        if instruction.program_id == SWAP_PROGRAM_ID {
-            State::process(&instruction.program_id, &account_infos, &instruction.data)
-        } else {
-            SplState::process(&instruction.program_id, &account_infos, &instruction.data)
-        }
-    }
-
-    fn mint_token(
-        program_id: &Pubkey,
-        authority_key: &Pubkey,
-        amount: u64,
-    ) -> ((Pubkey, Account), (Pubkey, Account)) {
-        let token_key = pubkey_rand();
-        let mut token_account = Account::new(0, size_of::<SplMint>(), &program_id);
-        let account_key = pubkey_rand();
-        let mut account_account = Account::new(0, size_of::<SplAccount>(), &program_id);
-
-        // create pool and pool account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &token_key, &authority_key).unwrap(),
-            vec![
-                &mut account_account,
-                &mut Account::default(),
-                &mut token_account,
-            ],
-        )
-        .unwrap();
-        let mut authority_account = Account::default();
-        do_process_instruction(
-            initialize_mint(
-                &program_id,
-                &token_key,
-                Some(&account_key),
-                Some(&authority_key),
-                amount,
-                2,
-            )
-            .unwrap(),
-            if amount == 0 {
-                vec![&mut token_account, &mut authority_account]
-            } else {
-                vec![
-                    &mut token_account,
-                    &mut account_account,
-                    &mut authority_account,
-                ]
-            },
-        )
-        .unwrap();
-
-        return ((token_key, token_account), (account_key, account_account));
-    }
-
-    #[test]
-    fn test_initialize() {
-        let swap_key = pubkey_rand();
-        let mut swap_account = Account::new(0, size_of::<State>(), &SWAP_PROGRAM_ID);
-        let authority_key = State::authority_id(&SWAP_PROGRAM_ID, &swap_key).unwrap();
-        let mut authority_account = Account::default();
-
-        let ((pool_key, mut pool_account), (pool_token_key, mut pool_token_account)) =
-            mint_token(&TOKEN_PROGRAM_ID, &authority_key, 0);
-        let ((_token_a_mint_key, mut _token_a_mint_account), (token_a_key, mut token_a_account)) =
-            mint_token(&TOKEN_PROGRAM_ID, &authority_key, 1000);
-        let ((_token_b_mint_key, mut _token_b_mint_account), (token_b_key, mut token_b_account)) =
-            mint_token(&TOKEN_PROGRAM_ID, &authority_key, 1000);
-
-        // Swap Init
-        do_process_instruction(
-            initialize(
-                &SWAP_PROGRAM_ID,
-                &TOKEN_PROGRAM_ID,
-                &swap_key,
-                &authority_key,
-                &token_a_key,
-                &token_b_key,
-                &pool_key,
-                &pool_token_key,
-                Fee {
-                    denominator: 1,
-                    numerator: 2,
-                },
-            )
-            .unwrap(),
-            vec![
-                &mut swap_account,
-                &mut authority_account,
-                &mut token_a_account,
-                &mut token_b_account,
-                &mut pool_account,
-                &mut pool_token_account,
-                &mut Account::default(),
-            ],
-        )
-        .unwrap();
-    }
-}
diff --git a/token/Cargo.lock b/token/Cargo.lock
index e05b552b87137c..1ea7a2ccbb3f7d 100644
--- a/token/Cargo.lock
+++ b/token/Cargo.lock
@@ -1,14 +1,44 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "addr2line"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b6a2d3371669ab3ca9797670853d61402b03d0b4b9ebf33d677dfa720203072"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "043164d8ba5c4c3035fec9bbee8647c0261d788f3474306f93bb65901cae0e86"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 dependencies = [
- "winapi",
+ "winapi 0.3.9",
 ]
 
+[[package]]
+name = "assert_matches"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7deb0a829ca7bcfaf5da70b073a8d128619259a7be8216a355e23f00763059e5"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -17,7 +47,7 @@ checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
  "hermit-abi",
  "libc",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -26,6 +56,27 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
+[[package]]
+name = "backtrace"
+version = "0.3.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46254cf2fdcdf1badb5934448c1bcbe046a56537b3987d96c51a7afc5d03f293"
+dependencies = [
+ "addr2line",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+ "serde",
+]
+
+[[package]]
+name = "base64"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3441f0f7b02788e948e47f457ca01f1d7e6d92c693bc132c22b087d3141c03ff"
+
 [[package]]
 name = "bincode"
 version = "1.2.1"
@@ -51,7 +102,7 @@ dependencies = [
  "block-padding",
  "byte-tools",
  "byteorder",
- "generic-array",
+ "generic-array 0.12.3",
 ]
 
 [[package]]
@@ -69,6 +120,12 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "476e9cd489f9e121e02ffa6014a8ef220ecb15c05ed23fc34cca13925dc283fb"
 
+[[package]]
+name = "bumpalo"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e8c087f005730276d1096a652e92a8bacee2e2472bcc9715a74d2bec38b5820"
+
 [[package]]
 name = "bv"
 version = "0.11.1"
@@ -91,6 +148,23 @@ version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
 
+[[package]]
+name = "bytes"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206fdffcfa2df7cbe15601ef46c813fce0965eb3286db6b56c583b814b51c81c"
+dependencies = [
+ "byteorder",
+ "either",
+ "iovec",
+]
+
+[[package]]
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+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e4cec68f03f32e44924783795810fa50a7035d8c8ebe78580ad7e6c703fba38"
+
 [[package]]
 name = "cbindgen"
 version = "0.14.2"
@@ -109,12 +183,33 @@ dependencies = [
  "toml",
 ]
 
+[[package]]
+name = "cc"
+version = "1.0.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e450b8da92aa6f274e7c6437692f9f2ce6d701fb73bacfcf87897b3f89a4c20e"
+dependencies = [
+ "jobserver",
+ "num_cpus",
+]
+
 [[package]]
 name = "cfg-if"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "chrono"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c74d84029116787153e02106bf53e66828452a4b325cc8652b788b5967c0a0b6"
+dependencies = [
+ "num-integer",
+ "num-traits",
+ "time",
+]
+
 [[package]]
 name = "clap"
 version = "2.33.1"
@@ -131,507 +226,1709 @@ dependencies = [
 ]
 
 [[package]]
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-version = "0.7.0"
+name = "clear_on_drop"
+version = "0.2.4"
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-checksum = "4434400df11d95d556bac068ddfedd482915eb18fe8bea89bc80b6e4b1c179e5"
+checksum = "c9cc5db465b294c3fa986d5bbb0f3017cd850bff6dd6c52f9ccff8b4d21b7b08"
 dependencies = [
- "generic-array",
- "subtle",
+ "cc",
 ]
 
 [[package]]
-name = "digest"
-version = "0.8.1"
+name = "cloudabi"
+version = "0.0.3"
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-checksum = "f3d0c8c8752312f9713efd397ff63acb9f85585afbf179282e720e7704954dd5"
+checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 dependencies = [
- "generic-array",
+ "bitflags",
 ]
 
 [[package]]
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-version = "1.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
-
-[[package]]
-name = "fake-simd"
-version = "0.1.2"
+name = "crossbeam-deque"
+version = "0.7.3"
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-checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
+checksum = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+ "maybe-uninit",
+]
 
 [[package]]
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-version = "0.1.1"
+name = "crossbeam-epoch"
+version = "0.8.2"
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-checksum = "835a3dc7d1ec9e75e2b5fb4ba75396837112d2060b03f7d43bc1897c7f7211da"
+checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "crossbeam-utils",
+ "lazy_static",
+ "maybe-uninit",
+ "memoffset",
+ "scopeguard",
+]
 
 [[package]]
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-version = "0.12.3"
+name = "crossbeam-queue"
+version = "0.2.3"
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-checksum = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
+checksum = "774ba60a54c213d409d5353bda12d49cd68d14e45036a285234c8d6f91f92570"
 dependencies = [
- "typenum",
+ "cfg-if",
+ "crossbeam-utils",
+ "maybe-uninit",
 ]
 
 [[package]]
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-version = "0.1.14"
+name = "crossbeam-utils"
+version = "0.7.2"
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-checksum = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
+checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
 dependencies = [
+ "autocfg",
  "cfg-if",
- "libc",
- "wasi",
+ "lazy_static",
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 [[package]]
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-version = "0.3.1"
+name = "crypto-mac"
+version = "0.7.0"
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-checksum = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
+checksum = "4434400df11d95d556bac068ddfedd482915eb18fe8bea89bc80b6e4b1c179e5"
 dependencies = [
- "unicode-segmentation",
+ "generic-array 0.12.3",
+ "subtle 1.0.0",
 ]
 
 [[package]]
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-version = "0.1.14"
+name = "curve25519-dalek"
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-checksum = "b9586eedd4ce6b3c498bc3b4dd92fc9f11166aa908a914071953768066c67909"
+checksum = "5d85653f070353a16313d0046f173f70d1aadd5b42600a14de626f0dfb3473a5"
 dependencies = [
- "libc",
+ "byteorder",
+ "digest",
+ "rand_core",
+ "subtle 2.2.3",
+ "zeroize",
 ]
 
 [[package]]
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-checksum = "644f9158b2f133fd50f5fb3242878846d9eb792e445c893805ff0e3824006e35"
+checksum = "f3d0c8c8752312f9713efd397ff63acb9f85585afbf179282e720e7704954dd5"
+dependencies = [
+ "generic-array 0.12.3",
+]
 
 [[package]]
-name = "hmac"
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+name = "dtoa"
+version = "0.4.6"
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-dependencies = [
- "crypto-mac",
- "digest",
-]
+checksum = "134951f4028bdadb9b84baf4232681efbf277da25144b9b0ad65df75946c422b"
 
 [[package]]
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-checksum = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
+checksum = "978710b352437433c97b2bff193f2fb1dfd58a093f863dd95e225a19baa599a2"
 dependencies = [
- "either",
+ "clear_on_drop",
+ "curve25519-dalek",
+ "rand",
+ "serde",
+ "sha2",
 ]
 
 [[package]]
-name = "itoa"
-version = "0.4.6"
+name = "either"
+version = "1.5.3"
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-checksum = "dc6f3ad7b9d11a0c00842ff8de1b60ee58661048eb8049ed33c73594f359d7e6"
+checksum = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
 
 [[package]]
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-version = "0.2.71"
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-checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
+checksum = "e8ac63f94732332f44fe654443c46f6375d1939684c17b0afb6cb56b0456e171"
+dependencies = [
+ "cfg-if",
+]
 
 [[package]]
-name = "log"
-version = "0.4.8"
+name = "env_logger"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+checksum = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
 dependencies = [
- "cfg-if",
+ "atty",
+ "humantime",
+ "log",
+ "regex",
+ "termcolor",
 ]
 
 [[package]]
-name = "num-derive"
-version = "0.2.5"
+name = "failure"
+version = "0.1.8"
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-checksum = "eafd0b45c5537c3ba526f79d3e75120036502bebacbb3f3220914067ce39dbf2"
+checksum = "d32e9bd16cc02eae7db7ef620b392808b89f6a5e16bb3497d159c6b92a0f4f86"
 dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "syn 0.15.44",
+ "backtrace",
+ "failure_derive",
 ]
 
 [[package]]
-name = "num-derive"
-version = "0.3.0"
+name = "failure_derive"
+version = "0.1.8"
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-checksum = "0c8b15b261814f992e33760b1fca9fe8b693d8a65299f20c9901688636cfb746"
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 dependencies = [
  "proc-macro2 1.0.18",
  "quote 1.0.7",
  "syn 1.0.31",
+ "synstructure",
 ]
 
 [[package]]
-name = "num-traits"
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+name = "fake-simd"
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-checksum = "ac267bcc07f48ee5f8935ab0d24f316fb722d7a1292e2913f0cc196b29ffd611"
-dependencies = [
- "autocfg",
-]
+checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
 
 [[package]]
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-checksum = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
+checksum = "835a3dc7d1ec9e75e2b5fb4ba75396837112d2060b03f7d43bc1897c7f7211da"
 
 [[package]]
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+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
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 dependencies = [
- "byteorder",
- "crypto-mac",
+ "bitflags",
+ "fuchsia-zircon-sys",
 ]
 
 [[package]]
-name = "ppv-lite86"
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+name = "fuchsia-zircon-sys"
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-checksum = "237a5ed80e274dbc66f86bd59c1e25edc039660be53194b5fe0a482e0f2612ea"
+checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
 
 [[package]]
-name = "proc-macro2"
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-dependencies = [
- "unicode-xid 0.1.0",
-]
+checksum = "1b980f2816d6ee8673b6517b52cb0e808a180efc92e5c19d02cdda79066703ef"
 
 [[package]]
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-checksum = "beae6331a816b1f65d04c45b078fd8e6c93e8071771f41b8163255bbd8d7c8fa"
+checksum = "f366ad74c28cca6ba456d95e6422883cfb4b252a83bed929c83abfdbbf2967d5"
 dependencies = [
- "unicode-xid 0.2.0",
+ "futures-core",
 ]
 
 [[package]]
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-version = "0.6.13"
+name = "futures-core"
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+checksum = "59f5fff90fd5d971f936ad674802482ba441b6f09ba5e15fd8b39145582ca399"
+
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+checksum = "de27142b013a8e869c14957e6d2edeef89e97c289e69d042ee3a49acd8b51789"
+
+[[package]]
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+checksum = "d0b5a30a4328ab5473878237c447333c093297bded83a4983d10f4deea240d39"
 dependencies = [
- "proc-macro2 0.4.30",
+ "proc-macro-hack",
+ "proc-macro2 1.0.18",
+ "quote 1.0.7",
+ "syn 1.0.31",
 ]
 
 [[package]]
-name = "quote"
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+checksum = "3f2032893cb734c7a05d85ce0cc8b8c4075278e93b24b66f9de99d6eb0fa8acc"
+
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 dependencies = [
- "proc-macro2 1.0.18",
+ "once_cell",
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 [[package]]
-name = "rand"
-version = "0.7.3"
+name = "futures-util"
+version = "0.3.5"
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+checksum = "8764574ff08b701a084482c3c7031349104b07ac897393010494beaa18ce32c6"
 dependencies = [
- "getrandom",
- "libc",
- "rand_chacha",
- "rand_core",
- "rand_hc",
+ "futures-core",
+ "futures-io",
+ "futures-macro",
+ "futures-task",
+ "memchr",
+ "pin-project",
+ "pin-utils",
+ "proc-macro-hack",
+ "proc-macro-nested",
+ "slab",
 ]
 
 [[package]]
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+name = "generic-array"
+version = "0.12.3"
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-checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
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 dependencies = [
- "ppv-lite86",
- "rand_core",
+ "typenum",
 ]
 
 [[package]]
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-version = "0.5.1"
+name = "generic-array"
+version = "0.14.3"
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-checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+checksum = "60fb4bb6bba52f78a471264d9a3b7d026cc0af47b22cd2cffbc0b787ca003e63"
 dependencies = [
- "getrandom",
+ "serde",
+ "typenum",
+ "version_check",
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 [[package]]
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-version = "0.2.0"
+name = "getrandom"
+version = "0.1.14"
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-checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
+checksum = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
 dependencies = [
- "rand_core",
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+checksum = "09bc590ec4ba8ba87652da2068d150dcada2cfa2e07faae270a5e0409aa51351"
 dependencies = [
- "serde",
+ "crossbeam-utils",
+ "futures",
+ "lazy_static",
+ "log",
+ "mio",
+ "num_cpus",
+ "parking_lot",
+ "slab",
+ "tokio-executor",
+ "tokio-io",
+ "tokio-sync",
 ]
 
 [[package]]
-name = "serde_derive"
-version = "1.0.112"
+name = "tokio-rustls"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf0343ce212ac0d3d6afd9391ac8e9c9efe06b533c8d33f660f6390cc4093f57"
+checksum = "228139ddd4fea3fa345a29233009635235833e52807af7ea6448ead03890d6a9"
 dependencies = [
- "proc-macro2 1.0.18",
- "quote 1.0.7",
- "syn 1.0.31",
+ "futures-core",
+ "rustls",
+ "tokio 0.2.22",
+ "webpki",
 ]
 
 [[package]]
-name = "serde_json"
-version = "1.0.55"
+name = "tokio-sync"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec2c5d7e739bc07a3e73381a39d61fdb5f671c60c1df26a130690665803d8226"
+checksum = "edfe50152bc8164fcc456dab7891fa9bf8beaf01c5ee7e1dd43a397c3cf87dee"
 dependencies = [
- "itoa",
- "ryu",
- "serde",
+ "fnv",
+ "futures",
 ]
 
 [[package]]
-name = "sha2"
-version = "0.8.2"
+name = "tokio-tcp"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a256f46ea78a0c0d9ff00077504903ac881a1dafdc20da66545699e7776b3e69"
+checksum = "98df18ed66e3b72e742f185882a9e201892407957e45fbff8da17ae7a7c51f72"
 dependencies = [
- "block-buffer",
- "digest",
- "fake-simd",
- "opaque-debug",
+ "bytes 0.4.12",
+ "futures",
+ "iovec",
+ "mio",
+ "tokio-io",
+ "tokio-reactor",
 ]
 
 [[package]]
-name = "solana-sdk"
-version = "1.2.13"
+name = "tokio-threadpool"
+version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cae779f912f1cbe2fe91df656ecc5ccdda9dd3378c0934f4390b7ba33501b3dc"
+checksum = "df720b6581784c118f0eb4310796b12b1d242a7eb95f716a8367855325c25f89"
 dependencies = [
- "bincode",
- "bs58",
- "bv",
- "hex",
- "hmac",
- "itertools",
+ "crossbeam-deque",
+ "crossbeam-queue",
+ "crossbeam-utils",
+ "futures",
+ "lazy_static",
  "log",
- "num-derive 0.3.0",
- "num-traits",
- "pbkdf2",
- "rustc_version",
- "rustversion",
- "serde",
- "serde_bytes",
- "serde_derive",
- "sha2",
- "solana-sdk-macro",
- "thiserror",
+ "num_cpus",
+ "slab",
+ "tokio-executor",
 ]
 
 [[package]]
-name = "solana-sdk-macro"
-version = "1.2.13"
+name = "tokio-timer"
+version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8924af69f2685287988a530014c3268d78d6ce3fe4a1a61f87537c545afa8427"
+checksum = "93044f2d313c95ff1cb7809ce9a7a05735b012288a888b62d4434fd58c94f296"
 dependencies = [
- "bs58",
- "proc-macro2 1.0.18",
- "quote 1.0.7",
- "rustversion",
- "syn 1.0.31",
+ "crossbeam-utils",
+ "futures",
+ "slab",
+ "tokio-executor",
 ]
 
 [[package]]
-name = "spl-token"
-version = "1.0.3"
+name = "tokio-udp"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2a0b10e610b39c38b031a2fcab08e4b82f16ece36504988dcbd81dbba650d82"
 dependencies = [
- "cbindgen",
- "num-derive 0.2.5",
- "num-traits",
- "rand",
- "remove_dir_all",
- "solana-sdk",
- "thiserror",
+ "bytes 0.4.12",
+ "futures",
+ "log",
+ "mio",
+ "tokio-codec",
+ "tokio-io",
+ "tokio-reactor",
 ]
 
 [[package]]
-name = "strsim"
-version = "0.8.0"
+name = "tokio-uds"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+checksum = "ab57a4ac4111c8c9dbcf70779f6fc8bc35ae4b2454809febac840ad19bd7e4e0"
+dependencies = [
+ "bytes 0.4.12",
+ "futures",
+ "iovec",
+ "libc",
+ "log",
+ "mio",
+ "mio-uds",
+ "tokio-codec",
+ "tokio-io",
+ "tokio-reactor",
+]
 
 [[package]]
-name = "subtle"
-version = "1.0.0"
+name = "tokio-util"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d67a5a62ba6e01cb2192ff309324cb4875d0c451d55fe2319433abe7a05a8ee"
+checksum = "be8242891f2b6cbef26a2d7e8605133c2c554cd35b3e4948ea892d6d68436499"
+dependencies = [
+ "bytes 0.5.6",
+ "futures-core",
+ "futures-sink",
+ "log",
+ "pin-project-lite",
+ "tokio 0.2.22",
+]
 
 [[package]]
-name = "syn"
-version = "0.15.44"
+name = "toml"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
+checksum = "ffc92d160b1eef40665be3a05630d003936a3bc7da7421277846c2613e92c71a"
 dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "unicode-xid 0.1.0",
+ "serde",
 ]
 
 [[package]]
-name = "syn"
-version = "1.0.31"
+name = "tower-service"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5304cfdf27365b7585c25d4af91b35016ed21ef88f17ced89c7093b43dba8b6"
-dependencies = [
- "proc-macro2 1.0.18",
- "quote 1.0.7",
- "unicode-xid 0.2.0",
-]
+checksum = "e987b6bf443f4b5b3b6f38704195592cca41c5bb7aedd3c3693c7081f8289860"
 
 [[package]]
-name = "tempfile"
-version = "3.1.0"
+name = "tracing"
+version = "0.1.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
+checksum = "dbdf4ccd1652592b01286a5dbe1e2a77d78afaa34beadd9872a5f7396f92aaa9"
 dependencies = [
  "cfg-if",
- "libc",
- "rand",
- "redox_syscall",
- "remove_dir_all",
- "winapi",
+ "log",
+ "tracing-core",
 ]
 
 [[package]]
-name = "textwrap"
-version = "0.11.0"
+name = "tracing-core"
+version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+checksum = "94ae75f0d28ae10786f3b1895c55fe72e79928fd5ccdebb5438c75e93fec178f"
 dependencies = [
- "unicode-width",
+ "lazy_static",
 ]
 
 [[package]]
-name = "thiserror"
-version = "1.0.20"
+name = "try-lock"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dfdd070ccd8ccb78f4ad66bf1982dc37f620ef696c6b5028fe2ed83dd3d0d08"
-dependencies = [
- "thiserror-impl",
-]
+checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"
 
 [[package]]
-name = "thiserror-impl"
-version = "1.0.20"
+name = "typenum"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd80fc12f73063ac132ac92aceea36734f04a1d93c1240c6944e23a3b8841793"
+checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
 dependencies = [
- "proc-macro2 1.0.18",
- "quote 1.0.7",
- "syn 1.0.31",
+ "version_check",
 ]
 
 [[package]]
-name = "toml"
-version = "0.5.6"
+name = "unicode-bidi"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffc92d160b1eef40665be3a05630d003936a3bc7da7421277846c2613e92c71a"
+checksum = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
 dependencies = [
- "serde",
+ "matches",
 ]
 
 [[package]]
-name = "typenum"
-version = "1.12.0"
+name = "unicode-normalization"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+checksum = "6fb19cf769fa8c6a80a162df694621ebeb4dafb606470b2b2fce0be40a98a977"
+dependencies = [
+ "tinyvec",
+]
 
 [[package]]
 name = "unicode-segmentation"
@@ -657,18 +1954,154 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 
+[[package]]
+name = "untrusted"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
+
+[[package]]
+name = "url"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "829d4a8476c35c9bf0bbce5a3b23f4106f79728039b726d292bb93bc106787cb"
+dependencies = [
+ "idna",
+ "matches",
+ "percent-encoding",
+]
+
 [[package]]
 name = "vec_map"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
+[[package]]
+name = "version_check"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+
+[[package]]
+name = "want"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
+dependencies = [
+ "log",
+ "try-lock",
+]
+
 [[package]]
 name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0563a9a4b071746dd5aedbc3a28c6fe9be4586fb3fbadb67c400d4f53c6b16c"
+dependencies = [
+ "cfg-if",
+ "serde",
+ "serde_json",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc71e4c5efa60fb9e74160e89b93353bc24059999c0ae0fb03affc39770310b0"
+dependencies = [
+ "bumpalo",
+ "lazy_static",
+ "log",
+ "proc-macro2 1.0.18",
+ "quote 1.0.7",
+ "syn 1.0.31",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95f8d235a77f880bcef268d379810ea6c0af2eacfa90b1ad5af731776e0c4699"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97c57cefa5fa80e2ba15641578b44d36e7a64279bc5ed43c6dbaf329457a2ed2"
+dependencies = [
+ "quote 1.0.7",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "841a6d1c35c6f596ccea1f82504a192a60378f64b3bb0261904ad8f2f5657556"
+dependencies = [
+ "proc-macro2 1.0.18",
+ "quote 1.0.7",
+ "syn 1.0.31",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93b162580e34310e5931c4b792560108b10fd14d64915d7fff8ff00180e70092"
+
+[[package]]
+name = "web-sys"
+version = "0.3.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dda38f4e5ca63eda02c059d243aa25b5f35ab98451e518c51612cd0f1bd19a47"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "webpki"
+version = "0.21.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1f50e1972865d6b1adb54167d1c8ed48606004c2c9d0ea5f1eeb34d95e863ef"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
+name = "webpki-roots"
+version = "0.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8eff4b7516a57307f9349c64bf34caa34b940b66fed4b2fb3136cb7386e5739"
+dependencies = [
+ "webpki",
+]
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -679,14 +2112,54 @@ dependencies = [
  "winapi-x86_64-pc-windows-gnu",
 ]
 
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
+
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winreg"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0120db82e8a1e0b9fb3345a539c478767c0048d842860994d96113d5b667bd69"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "ws2_32-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3cbac2ed2ba24cc90f5e06485ac8c7c1e5449fe8911aef4d8877218af021a5b8"
diff --git a/token/Cargo.toml b/token/Cargo.toml
index 426ee87d12720a..fd52d2d926827c 100644
--- a/token/Cargo.toml
+++ b/token/Cargo.toml
@@ -12,13 +12,16 @@ edition = "2018"
 exclude = ["js/**"]
 
 [features]
+no-entrypoint = []
 skip-no-mangle = ["solana-sdk/skip-no-mangle"]
+program = ["solana-sdk/program"]
+default = ["solana-sdk/default"]
 
 [dependencies]
 num-derive = "0.2"
 num-traits = "0.2"
 remove_dir_all = "=0.5.0"
-solana-sdk = { version = "=1.2.13", default-features = false, features=["program"] }
+solana-sdk = { version = "=1.2.13", default-features = false, optional = true }
 thiserror = "1.0"
 
 [dev-dependencies]
diff --git a/token/src/entrypoint.rs b/token/src/entrypoint.rs
new file mode 100644
index 00000000000000..b5594ca80aa357
--- /dev/null
+++ b/token/src/entrypoint.rs
@@ -0,0 +1,24 @@
+//! Program entrypoint
+
+#![cfg(feature = "program")]
+#![cfg(not(feature = "no-entrypoint"))]
+
+use crate::{error::TokenError, processor::Processor};
+use solana_sdk::{
+    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult,
+    program_error::PrintProgramError, pubkey::Pubkey,
+};
+
+entrypoint!(process_instruction);
+fn process_instruction<'a>(
+    program_id: &Pubkey,
+    accounts: &'a [AccountInfo<'a>],
+    instruction_data: &[u8],
+) -> ProgramResult {
+    if let Err(error) = Processor::process(program_id, accounts, instruction_data) {
+        // catch the error so we can print it
+        error.print::<TokenError>();
+        return Err(error);
+    }
+    Ok(())
+}
diff --git a/token/src/error.rs b/token/src/error.rs
index 7499d48cbff22a..32f98223215937 100644
--- a/token/src/error.rs
+++ b/token/src/error.rs
@@ -1,12 +1,7 @@
 //! Error types
 
 use num_derive::FromPrimitive;
-use num_traits::FromPrimitive;
-use solana_sdk::{
-    decode_error::DecodeError,
-    info,
-    program_error::{PrintProgramError, ProgramError},
-};
+use solana_sdk::{decode_error::DecodeError, program_error::ProgramError};
 use thiserror::Error;
 
 /// Errors that may be returned by the Token program.
@@ -59,55 +54,3 @@ impl<T> DecodeError<T> for TokenError {
         "TokenError"
     }
 }
-impl PrintProgramError for TokenError {
-    fn print<E>(&self)
-    where
-        E: 'static + std::error::Error + DecodeError<E> + PrintProgramError + FromPrimitive,
-    {
-        match self {
-            TokenError::InsufficientFunds => info!("Error: insufficient funds"),
-            TokenError::MintMismatch => info!("Error: Account not associated with this Mint"),
-            TokenError::OwnerMismatch => info!("Error: owner does not match"),
-            TokenError::FixedSupply => info!("Error: the total supply of this token is fixed"),
-            TokenError::AlreadyInUse => info!("Error: account or token already in use"),
-            TokenError::OwnerRequiredIfNoInitialSupply => {
-                info!("Error: An owner is required if supply is zero")
-            }
-            TokenError::InvalidNumberOfProvidedSigners => {
-                info!("Error: Invalid number of provided signers")
-            }
-            TokenError::InvalidNumberOfRequiredSigners => {
-                info!("Error: Invalid number of required signers")
-            }
-            TokenError::UninitializedState => info!("Error: State is uninitialized"),
-            TokenError::NativeNotSupported => {
-                info!("Error: Instruction does not support native tokens")
-            }
-            TokenError::NonNativeNotSupported => {
-                info!("Error: Instruction does not support non-native tokens")
-            }
-            TokenError::InvalidInstruction => info!("Error: Invalid instruction"),
-        }
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use super::*;
-
-    fn return_token_error_as_program_error() -> ProgramError {
-        TokenError::MintMismatch.into()
-    }
-
-    #[test]
-    fn test_print_error() {
-        let error = return_token_error_as_program_error();
-        error.print::<TokenError>();
-    }
-
-    #[test]
-    #[should_panic(expected = "Custom(1)")]
-    fn test_error_unwrap() {
-        Err::<(), ProgramError>(return_token_error_as_program_error()).unwrap();
-    }
-}
diff --git a/token/src/lib.rs b/token/src/lib.rs
index 8a309d08187cb8..21ca4d680aa594 100644
--- a/token/src/lib.rs
+++ b/token/src/lib.rs
@@ -2,6 +2,7 @@
 
 //! An ERC20-like Token program for the Solana blockchain
 
+pub mod entrypoint;
 pub mod error;
 pub mod instruction;
 pub mod native_mint;
diff --git a/token/src/processor.rs b/token/src/processor.rs
index 6b5e58401544fe..759edb6e108a6c 100644
--- a/token/src/processor.rs
+++ b/token/src/processor.rs
@@ -1,21 +1,2193 @@
-//! Program entrypoint definitions
+//! Program state processor
 
-use crate::{error::TokenError, state::State};
+#![cfg(feature = "program")]
+
+use crate::{
+    error::TokenError,
+    instruction::{is_valid_signer_index, TokenInstruction},
+    option::COption,
+    state::{self, Account, Mint, Multisig},
+};
+use num_traits::FromPrimitive;
 use solana_sdk::{
-    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult,
-    program_error::PrintProgramError, pubkey::Pubkey,
+    account_info::{next_account_info, AccountInfo},
+    decode_error::DecodeError,
+    entrypoint::ProgramResult,
+    info,
+    program_error::{PrintProgramError, ProgramError},
+    pubkey::Pubkey,
 };
+use std::mem::size_of;
+
+/// Program state handler.
+pub struct Processor {}
+impl Processor {
+    /// Processes an [InitializeMint](enum.TokenInstruction.html) instruction.
+    pub fn process_initialize_mint(
+        accounts: &[AccountInfo],
+        amount: u64,
+        decimals: u8,
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let mint_info = next_account_info(account_info_iter)?;
+
+        let mut mint_info_data = mint_info.data.borrow_mut();
+        let mut mint: &mut Mint = state::unpack_unchecked(&mut mint_info_data)?;
+        if mint.is_initialized {
+            return Err(TokenError::AlreadyInUse.into());
+        }
+
+        let owner = if amount != 0 {
+            let dest_account_info = next_account_info(account_info_iter)?;
+            let mut dest_account_data = dest_account_info.data.borrow_mut();
+            let mut dest_account: &mut Account = state::unpack(&mut dest_account_data)?;
+
+            if mint_info.key != &dest_account.mint {
+                return Err(TokenError::MintMismatch.into());
+            }
+
+            dest_account.amount = amount;
+
+            if let Ok(owner_info) = next_account_info(account_info_iter) {
+                COption::Some(*owner_info.key)
+            } else {
+                COption::None
+            }
+        } else if let Ok(owner_info) = next_account_info(account_info_iter) {
+            COption::Some(*owner_info.key)
+        } else {
+            return Err(TokenError::OwnerRequiredIfNoInitialSupply.into());
+        };
+
+        mint.owner = owner;
+        mint.decimals = decimals;
+        mint.is_initialized = true;
+
+        Ok(())
+    }
+
+    /// Processes an [InitializeAccount](enum.TokenInstruction.html) instruction.
+    pub fn process_initialize_account(accounts: &[AccountInfo]) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let new_account_info = next_account_info(account_info_iter)?;
+        let mint_info = next_account_info(account_info_iter)?;
+        let owner_info = next_account_info(account_info_iter)?;
+
+        let mut new_account_data = new_account_info.data.borrow_mut();
+        let mut account: &mut Account = state::unpack_unchecked(&mut new_account_data)?;
+        if account.is_initialized {
+            return Err(TokenError::AlreadyInUse.into());
+        }
+
+        account.mint = *mint_info.key;
+        account.owner = *owner_info.key;
+        account.delegate = COption::None;
+        account.delegated_amount = 0;
+        account.is_initialized = true;
+        if *mint_info.key == crate::native_mint::id() {
+            account.is_native = true;
+            account.amount = new_account_info.lamports();
+        } else {
+            account.is_native = false;
+            account.amount = 0;
+        };
+
+        Ok(())
+    }
+
+    /// Processes a [InitializeMultisig](enum.TokenInstruction.html) instruction.
+    pub fn process_initialize_multisig(accounts: &[AccountInfo], m: u8) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let multisig_info = next_account_info(account_info_iter)?;
+        let mut multisig_account_data = multisig_info.data.borrow_mut();
+        let mut multisig: &mut Multisig = state::unpack_unchecked(&mut multisig_account_data)?;
+        if multisig.is_initialized {
+            return Err(TokenError::AlreadyInUse.into());
+        }
+
+        let signer_infos = account_info_iter.as_slice();
+        multisig.m = m;
+        multisig.n = signer_infos.len() as u8;
+        if !is_valid_signer_index(multisig.n as usize) {
+            return Err(TokenError::InvalidNumberOfProvidedSigners.into());
+        }
+        if !is_valid_signer_index(multisig.m as usize) {
+            return Err(TokenError::InvalidNumberOfRequiredSigners.into());
+        }
+        for (i, signer_info) in signer_infos.iter().enumerate() {
+            multisig.signers[i] = *signer_info.key;
+        }
+        multisig.is_initialized = true;
+
+        Ok(())
+    }
+
+    /// Processes a [Transfer](enum.TokenInstruction.html) instruction.
+    pub fn process_transfer(
+        program_id: &Pubkey,
+        accounts: &[AccountInfo],
+        amount: u64,
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let source_account_info = next_account_info(account_info_iter)?;
+        let dest_account_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+
+        let mut source_data = source_account_info.data.borrow_mut();
+        let mut source_account: &mut Account = state::unpack(&mut source_data)?;
+        let mut dest_data = dest_account_info.data.borrow_mut();
+        let mut dest_account: &mut Account = state::unpack(&mut dest_data)?;
+
+        if source_account.amount < amount {
+            return Err(TokenError::InsufficientFunds.into());
+        }
+        if source_account.mint != dest_account.mint {
+            return Err(TokenError::MintMismatch.into());
+        }
+
+        match source_account.delegate {
+            COption::Some(ref delegate) if authority_info.key == delegate => {
+                Self::validate_owner(
+                    program_id,
+                    delegate,
+                    authority_info,
+                    account_info_iter.as_slice(),
+                )?;
+                if source_account.delegated_amount < amount {
+                    return Err(TokenError::InsufficientFunds.into());
+                }
+                source_account.delegated_amount -= amount;
+                if source_account.delegated_amount == 0 {
+                    source_account.delegate = COption::None;
+                }
+            }
+            _ => Self::validate_owner(
+                program_id,
+                &source_account.owner,
+                authority_info,
+                account_info_iter.as_slice(),
+            )?,
+        };
+
+        source_account.amount -= amount;
+        dest_account.amount += amount;
+
+        if source_account.is_native {
+            **source_account_info.lamports.borrow_mut() -= amount;
+            **dest_account_info.lamports.borrow_mut() += amount;
+        }
+
+        Ok(())
+    }
+
+    /// Processes an [Approve](enum.TokenInstruction.html) instruction.
+    pub fn process_approve(
+        program_id: &Pubkey,
+        accounts: &[AccountInfo],
+        amount: u64,
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let source_account_info = next_account_info(account_info_iter)?;
+
+        let mut source_data = source_account_info.data.borrow_mut();
+        let mut source_account: &mut Account = state::unpack(&mut source_data)?;
+        let delegate_info = next_account_info(account_info_iter)?;
+        let owner_info = next_account_info(account_info_iter)?;
+
+        Self::validate_owner(
+            program_id,
+            &source_account.owner,
+            owner_info,
+            account_info_iter.as_slice(),
+        )?;
+
+        source_account.delegate = COption::Some(*delegate_info.key);
+        source_account.delegated_amount = amount;
+
+        Ok(())
+    }
+
+    /// Processes an [Revoke](enum.TokenInstruction.html) instruction.
+    pub fn process_revoke(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let source_account_info = next_account_info(account_info_iter)?;
+
+        let mut source_data = source_account_info.data.borrow_mut();
+        let mut source_account: &mut Account = state::unpack(&mut source_data)?;
+        let owner_info = next_account_info(account_info_iter)?;
+
+        Self::validate_owner(
+            program_id,
+            &source_account.owner,
+            owner_info,
+            account_info_iter.as_slice(),
+        )?;
+
+        source_account.delegate = COption::None;
+        source_account.delegated_amount = 0;
+
+        Ok(())
+    }
+
+    /// Processes a [SetOwner](enum.TokenInstruction.html) instruction.
+    pub fn process_set_owner(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let account_info = next_account_info(account_info_iter)?;
+        let new_owner_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+
+        if account_info.data_len() == size_of::<Account>() {
+            let mut account_data = account_info.data.borrow_mut();
+            let mut account: &mut Account = state::unpack(&mut account_data)?;
+
+            Self::validate_owner(
+                program_id,
+                &account.owner,
+                authority_info,
+                account_info_iter.as_slice(),
+            )?;
+
+            account.owner = *new_owner_info.key;
+        } else if account_info.data_len() == size_of::<Mint>() {
+            let mut account_data = account_info.data.borrow_mut();
+            let mut mint: &mut Mint = state::unpack(&mut account_data)?;
+
+            match mint.owner {
+                COption::Some(ref owner) => {
+                    Self::validate_owner(
+                        program_id,
+                        owner,
+                        authority_info,
+                        account_info_iter.as_slice(),
+                    )?;
+                }
+                COption::None => return Err(TokenError::FixedSupply.into()),
+            }
+            mint.owner = COption::Some(*new_owner_info.key);
+        } else {
+            return Err(ProgramError::InvalidArgument);
+        }
+
+        Ok(())
+    }
+
+    /// Processes a [MintTo](enum.TokenInstruction.html) instruction.
+    pub fn process_mint_to(
+        program_id: &Pubkey,
+        accounts: &[AccountInfo],
+        amount: u64,
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let mint_info = next_account_info(account_info_iter)?;
+        let dest_account_info = next_account_info(account_info_iter)?;
+        let owner_info = next_account_info(account_info_iter)?;
+
+        let mut dest_account_data = dest_account_info.data.borrow_mut();
+        let mut dest_account: &mut Account = state::unpack(&mut dest_account_data)?;
+
+        if dest_account.is_native {
+            return Err(TokenError::NativeNotSupported.into());
+        }
+        if mint_info.key != &dest_account.mint {
+            return Err(TokenError::MintMismatch.into());
+        }
+
+        let mut mint_info_data = mint_info.data.borrow_mut();
+        let mint: &mut Mint = state::unpack(&mut mint_info_data)?;
+
+        match mint.owner {
+            COption::Some(owner) => {
+                Self::validate_owner(program_id, &owner, owner_info, account_info_iter.as_slice())?;
+            }
+            COption::None => {
+                return Err(TokenError::FixedSupply.into());
+            }
+        }
+
+        dest_account.amount += amount;
+
+        Ok(())
+    }
+
+    /// Processes a [Burn](enum.TokenInstruction.html) instruction.
+    pub fn process_burn(
+        program_id: &Pubkey,
+        accounts: &[AccountInfo],
+        amount: u64,
+    ) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let source_account_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+
+        let mut source_data = source_account_info.data.borrow_mut();
+        let source_account: &mut Account = state::unpack(&mut source_data)?;
 
-entrypoint!(process_instruction);
-fn process_instruction<'a>(
-    program_id: &Pubkey,
-    accounts: &'a [AccountInfo<'a>],
-    instruction_data: &[u8],
-) -> ProgramResult {
-    if let Err(error) = State::process(program_id, accounts, instruction_data) {
-        // catch the error so we can print it
+        if source_account.is_native {
+            return Err(TokenError::NativeNotSupported.into());
+        }
+        if source_account.amount < amount {
+            return Err(TokenError::InsufficientFunds.into());
+        }
+
+        match source_account.delegate {
+            COption::Some(ref delegate) if authority_info.key == delegate => {
+                Self::validate_owner(
+                    program_id,
+                    delegate,
+                    authority_info,
+                    account_info_iter.as_slice(),
+                )?;
+
+                if source_account.delegated_amount < amount {
+                    return Err(TokenError::InsufficientFunds.into());
+                }
+                source_account.delegated_amount -= amount;
+                if source_account.delegated_amount == 0 {
+                    source_account.delegate = COption::None;
+                }
+            }
+            _ => Self::validate_owner(
+                program_id,
+                &source_account.owner,
+                authority_info,
+                account_info_iter.as_slice(),
+            )?,
+        }
+
+        source_account.amount -= amount;
+
+        Ok(())
+    }
+
+    /// Processes a [CloseAccount](enum.TokenInstruction.html) instruction.
+    pub fn process_close_account(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+        let account_info_iter = &mut accounts.iter();
+        let source_account_info = next_account_info(account_info_iter)?;
+        let dest_account_info = next_account_info(account_info_iter)?;
+        let authority_info = next_account_info(account_info_iter)?;
+
+        let mut source_data = source_account_info.data.borrow_mut();
+        let source_account: &mut Account = state::unpack(&mut source_data)?;
+
+        if !source_account.is_native {
+            return Err(TokenError::NonNativeNotSupported.into());
+        }
+
+        Self::validate_owner(
+            program_id,
+            &source_account.owner,
+            authority_info,
+            account_info_iter.as_slice(),
+        )?;
+
+        **dest_account_info.lamports.borrow_mut() += source_account_info.lamports();
+        **source_account_info.lamports.borrow_mut() = 0;
+        source_account.amount = 0;
+
+        Ok(())
+    }
+
+    /// Processes an [Instruction](enum.Instruction.html).
+    pub fn process(program_id: &Pubkey, accounts: &[AccountInfo], input: &[u8]) -> ProgramResult {
+        let instruction = TokenInstruction::unpack(input)?;
+
+        match instruction {
+            TokenInstruction::InitializeMint { amount, decimals } => {
+                info!("Instruction: InitializeMint");
+                Self::process_initialize_mint(accounts, amount, decimals)
+            }
+            TokenInstruction::InitializeAccount => {
+                info!("Instruction: InitializeAccount");
+                Self::process_initialize_account(accounts)
+            }
+            TokenInstruction::InitializeMultisig { m } => {
+                info!("Instruction: InitializeMultisig");
+                Self::process_initialize_multisig(accounts, m)
+            }
+            TokenInstruction::Transfer { amount } => {
+                info!("Instruction: Transfer");
+                Self::process_transfer(program_id, accounts, amount)
+            }
+            TokenInstruction::Approve { amount } => {
+                info!("Instruction: Approve");
+                Self::process_approve(program_id, accounts, amount)
+            }
+            TokenInstruction::Revoke => {
+                info!("Instruction: Revoke");
+                Self::process_revoke(program_id, accounts)
+            }
+            TokenInstruction::SetOwner => {
+                info!("Instruction: SetOwner");
+                Self::process_set_owner(program_id, accounts)
+            }
+            TokenInstruction::MintTo { amount } => {
+                info!("Instruction: MintTo");
+                Self::process_mint_to(program_id, accounts, amount)
+            }
+            TokenInstruction::Burn { amount } => {
+                info!("Instruction: Burn");
+                Self::process_burn(program_id, accounts, amount)
+            }
+            TokenInstruction::CloseAccount => {
+                info!("Instruction: CloseAccount");
+                Self::process_close_account(program_id, accounts)
+            }
+        }
+    }
+
+    /// Validates owner(s) are present
+    pub fn validate_owner(
+        program_id: &Pubkey,
+        expected_owner: &Pubkey,
+        owner_account_info: &AccountInfo,
+        signers: &[AccountInfo],
+    ) -> ProgramResult {
+        if expected_owner != owner_account_info.key {
+            return Err(TokenError::OwnerMismatch.into());
+        }
+        if program_id == owner_account_info.owner
+            && owner_account_info.data_len() == std::mem::size_of::<Multisig>()
+        {
+            let mut owner_data = owner_account_info.data.borrow_mut();
+            let multisig: &mut Multisig = state::unpack(&mut owner_data)?;
+            let mut num_signers = 0;
+            for signer in signers.iter() {
+                if multisig.signers[0..multisig.n as usize].contains(signer.key) {
+                    if !signer.is_signer {
+                        return Err(ProgramError::MissingRequiredSignature);
+                    }
+                    num_signers += 1;
+                }
+            }
+            if num_signers < multisig.m {
+                return Err(ProgramError::MissingRequiredSignature);
+            }
+        } else if !owner_account_info.is_signer {
+            return Err(ProgramError::MissingRequiredSignature);
+        }
+        Ok(())
+    }
+}
+
+impl PrintProgramError for TokenError {
+    fn print<E>(&self)
+    where
+        E: 'static + std::error::Error + DecodeError<E> + PrintProgramError + FromPrimitive,
+    {
+        match self {
+            TokenError::InsufficientFunds => info!("Error: insufficient funds"),
+            TokenError::MintMismatch => info!("Error: Account not associated with this Mint"),
+            TokenError::OwnerMismatch => info!("Error: owner does not match"),
+            TokenError::FixedSupply => info!("Error: the total supply of this token is fixed"),
+            TokenError::AlreadyInUse => info!("Error: account or token already in use"),
+            TokenError::OwnerRequiredIfNoInitialSupply => {
+                info!("Error: An owner is required if supply is zero")
+            }
+            TokenError::InvalidNumberOfProvidedSigners => {
+                info!("Error: Invalid number of provided signers")
+            }
+            TokenError::InvalidNumberOfRequiredSigners => {
+                info!("Error: Invalid number of required signers")
+            }
+            TokenError::UninitializedState => info!("Error: State is uninitialized"),
+            TokenError::NativeNotSupported => {
+                info!("Error: Instruction does not support native tokens")
+            }
+            TokenError::NonNativeNotSupported => {
+                info!("Error: Instruction does not support non-native tokens")
+            }
+            TokenError::InvalidInstruction => info!("Error: Invalid instruction"),
+        }
+    }
+}
+
+// Pull in syscall stubs when building for non-BPF targets
+#[cfg(not(target_arch = "bpf"))]
+solana_sdk::program_stubs!();
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::instruction::{
+        approve, burn, close_account, initialize_account, initialize_mint, initialize_multisig,
+        mint_to, revoke, set_owner, transfer, MAX_SIGNERS,
+    };
+    use solana_sdk::{
+        account::Account as SolanaAccount, account_info::create_is_signer_account_infos,
+        clock::Epoch, instruction::Instruction,
+    };
+
+    fn pubkey_rand() -> Pubkey {
+        Pubkey::new(&rand::random::<[u8; 32]>())
+    }
+
+    fn do_process_instruction(
+        instruction: Instruction,
+        accounts: Vec<&mut SolanaAccount>,
+    ) -> ProgramResult {
+        let mut meta = instruction
+            .accounts
+            .iter()
+            .zip(accounts)
+            .map(|(account_meta, account)| (&account_meta.pubkey, account_meta.is_signer, account))
+            .collect::<Vec<_>>();
+
+        let account_infos = create_is_signer_account_infos(&mut meta);
+        Processor::process(&instruction.program_id, &account_infos, &instruction.data)
+    }
+
+    fn return_token_error_as_program_error() -> ProgramError {
+        TokenError::MintMismatch.into()
+    }
+
+    #[test]
+    fn test_print_error() {
+        let error = return_token_error_as_program_error();
         error.print::<TokenError>();
-        return Err(error);
     }
-    Ok(())
+
+    #[test]
+    #[should_panic(expected = "Custom(1)")]
+    fn test_error_unwrap() {
+        Err::<(), ProgramError>(return_token_error_as_program_error()).unwrap();
+    }
+
+    #[test]
+    fn test_unique_account_sizes() {
+        assert_ne!(size_of::<Mint>(), 0);
+        assert_ne!(size_of::<Mint>(), size_of::<Account>());
+        assert_ne!(size_of::<Mint>(), size_of::<Multisig>());
+        assert_ne!(size_of::<Account>(), 0);
+        assert_ne!(size_of::<Account>(), size_of::<Multisig>());
+        assert_ne!(size_of::<Multisig>(), 0);
+    }
+
+    #[test]
+    fn test_initialize_mint() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let mint2_key = pubkey_rand();
+        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+
+        // account not created
+        assert_eq!(
+            Err(TokenError::UninitializedState.into()),
+            do_process_instruction(
+                initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
+                vec![&mut mint_account, &mut account_account]
+            )
+        );
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut owner_account, &mut mint_account],
+        )
+        .unwrap();
+
+        // create new mint
+        do_process_instruction(
+            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
+            vec![&mut mint_account, &mut account_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account2_account, &mut owner_account, &mut mint_account],
+        )
+        .unwrap();
+
+        // mismatch account
+        assert_eq!(
+            Err(TokenError::MintMismatch.into()),
+            do_process_instruction(
+                initialize_mint(&program_id, &mint2_key, Some(&account2_key), None, 1000, 2)
+                    .unwrap(),
+                vec![&mut mint2_account, &mut account2_account]
+            )
+        );
+
+        // create twice
+        assert_eq!(
+            Err(TokenError::AlreadyInUse.into()),
+            do_process_instruction(
+                initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
+                vec![&mut mint_account, &mut account_account]
+            )
+        );
+    }
+
+    #[test]
+    fn test_initialize_mint_account() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create twice
+        assert_eq!(
+            Err(TokenError::AlreadyInUse.into()),
+            do_process_instruction(
+                initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+                vec![&mut account_account, &mut mint_account, &mut owner_account],
+            )
+        );
+    }
+
+    #[test]
+    fn test_transfer() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account3_key = pubkey_rand();
+        let mut account3_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let delegate_key = pubkey_rand();
+        let mut delegate_account = SolanaAccount::default();
+        let mismatch_key = pubkey_rand();
+        let mut mismatch_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let owner2_key = pubkey_rand();
+        let mut owner2_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let mint2_key = pubkey_rand();
+        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account2_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account3_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account3_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create mismatch account
+        do_process_instruction(
+            initialize_account(&program_id, &mismatch_key, &mint2_key, &owner_key).unwrap(),
+            vec![
+                &mut mismatch_account,
+                &mut mint2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // create new mint
+        do_process_instruction(
+            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
+            vec![&mut mint_account, &mut account_account],
+        )
+        .unwrap();
+
+        // missing signer
+        let mut instruction = transfer(
+            &program_id,
+            &account_key,
+            &account2_key,
+            &owner_key,
+            &[],
+            1000,
+        )
+        .unwrap();
+        instruction.accounts[2].is_signer = false;
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            do_process_instruction(
+                instruction,
+                vec![
+                    &mut account_account,
+                    &mut account2_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+
+        // mismatch mint
+        assert_eq!(
+            Err(TokenError::MintMismatch.into()),
+            do_process_instruction(
+                transfer(
+                    &program_id,
+                    &account_key,
+                    &mismatch_key,
+                    &owner_key,
+                    &[],
+                    1000
+                )
+                .unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut mismatch_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+
+        // missing owner
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                transfer(
+                    &program_id,
+                    &account_key,
+                    &account2_key,
+                    &owner2_key,
+                    &[],
+                    1000
+                )
+                .unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut account2_account,
+                    &mut owner2_account,
+                ],
+            )
+        );
+
+        // transfer
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account_key,
+                &account2_key,
+                &owner_key,
+                &[],
+                1000,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut account2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // insufficient funds
+        assert_eq!(
+            Err(TokenError::InsufficientFunds.into()),
+            do_process_instruction(
+                transfer(&program_id, &account_key, &account2_key, &owner_key, &[], 1).unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut account2_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+
+        // transfer half back
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account2_key,
+                &account_key,
+                &owner_key,
+                &[],
+                500,
+            )
+            .unwrap(),
+            vec![
+                &mut account2_account,
+                &mut account_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // transfer rest
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account2_key,
+                &account_key,
+                &owner_key,
+                &[],
+                500,
+            )
+            .unwrap(),
+            vec![
+                &mut account2_account,
+                &mut account_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // insufficient funds
+        assert_eq!(
+            Err(TokenError::InsufficientFunds.into()),
+            do_process_instruction(
+                transfer(&program_id, &account2_key, &account_key, &owner_key, &[], 1).unwrap(),
+                vec![
+                    &mut account2_account,
+                    &mut account_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+
+        // approve delegate
+        do_process_instruction(
+            approve(
+                &program_id,
+                &account_key,
+                &delegate_key,
+                &owner_key,
+                &[],
+                100,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut delegate_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // transfer via delegate
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account_key,
+                &account2_key,
+                &delegate_key,
+                &[],
+                100,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut account2_account,
+                &mut delegate_account,
+            ],
+        )
+        .unwrap();
+
+        // insufficient funds approved via delegate
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                transfer(
+                    &program_id,
+                    &account_key,
+                    &account2_key,
+                    &delegate_key,
+                    &[],
+                    100
+                )
+                .unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut account2_account,
+                    &mut delegate_account,
+                ],
+            )
+        );
+
+        // transfer rest
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account_key,
+                &account2_key,
+                &owner_key,
+                &[],
+                900,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut account2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // approve delegate
+        do_process_instruction(
+            approve(
+                &program_id,
+                &account_key,
+                &delegate_key,
+                &owner_key,
+                &[],
+                100,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut delegate_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // insufficient funds in source account via delegate
+        assert_eq!(
+            Err(TokenError::InsufficientFunds.into()),
+            do_process_instruction(
+                transfer(
+                    &program_id,
+                    &account_key,
+                    &account2_key,
+                    &delegate_key,
+                    &[],
+                    100
+                )
+                .unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut account2_account,
+                    &mut delegate_account,
+                ],
+            )
+        );
+    }
+
+    #[test]
+    fn test_mintable_token_with_zero_supply() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut owner_account, &mut mint_account],
+        )
+        .unwrap();
+
+        // create mint-able token without owner
+        let mut instruction =
+            initialize_mint(&program_id, &mint_key, None, Some(&owner_key), 0, 2).unwrap();
+        instruction.accounts.pop();
+        assert_eq!(
+            Err(TokenError::OwnerRequiredIfNoInitialSupply.into()),
+            do_process_instruction(instruction, vec![&mut mint_account])
+        );
+
+        // create mint-able token with zero supply
+        let amount = 0;
+        let decimals = 2;
+        do_process_instruction(
+            initialize_mint(
+                &program_id,
+                &mint_key,
+                None,
+                Some(&owner_key),
+                amount,
+                decimals,
+            )
+            .unwrap(),
+            vec![&mut mint_account, &mut account_account],
+        )
+        .unwrap();
+        let mint: &mut Mint = state::unpack(&mut mint_account.data).unwrap();
+        assert_eq!(
+            *mint,
+            Mint {
+                owner: COption::Some(owner_key),
+                decimals,
+                is_initialized: true,
+            }
+        );
+
+        // mint to
+        do_process_instruction(
+            mint_to(&program_id, &mint_key, &account_key, &owner_key, &[], 42).unwrap(),
+            vec![&mut mint_account, &mut account_account, &mut owner_account],
+        )
+        .unwrap();
+
+        let _: &mut Mint = state::unpack(&mut mint_account.data).unwrap();
+        let dest_account: &mut Account = state::unpack(&mut account_account.data).unwrap();
+        assert_eq!(dest_account.amount, 42);
+    }
+
+    #[test]
+    fn test_approve() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let delegate_key = pubkey_rand();
+        let mut delegate_account = SolanaAccount::default();
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let owner2_key = pubkey_rand();
+        let mut owner2_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut owner_account, &mut mint_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account2_account, &mut owner_account, &mut mint_account],
+        )
+        .unwrap();
+
+        // create new mint
+        do_process_instruction(
+            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
+            vec![&mut mint_account, &mut account_account],
+        )
+        .unwrap();
+
+        // missing signer
+        let mut instruction = approve(
+            &program_id,
+            &account_key,
+            &delegate_key,
+            &owner_key,
+            &[],
+            100,
+        )
+        .unwrap();
+        instruction.accounts[2].is_signer = false;
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            do_process_instruction(
+                instruction,
+                vec![
+                    &mut account_account,
+                    &mut delegate_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+
+        // no owner
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                approve(
+                    &program_id,
+                    &account_key,
+                    &delegate_key,
+                    &owner2_key,
+                    &[],
+                    100
+                )
+                .unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut delegate_account,
+                    &mut owner2_account,
+                ],
+            )
+        );
+
+        // approve delegate
+        do_process_instruction(
+            approve(
+                &program_id,
+                &account_key,
+                &delegate_key,
+                &owner_key,
+                &[],
+                100,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut delegate_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // revoke delegate
+        do_process_instruction(
+            revoke(&program_id, &account_key, &owner_key, &[]).unwrap(),
+            vec![&mut account_account, &mut owner_account],
+        )
+        .unwrap();
+    }
+
+    #[test]
+    fn test_set_owner() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let owner2_key = pubkey_rand();
+        let mut owner2_account = SolanaAccount::default();
+        let owner3_key = pubkey_rand();
+        let mut owner3_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let mint2_key = pubkey_rand();
+        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+
+        // invalid account
+        assert_eq!(
+            Err(TokenError::UninitializedState.into()),
+            do_process_instruction(
+                set_owner(&program_id, &account_key, &owner2_key, &owner_key, &[]).unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut owner2_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account2_key, &mint2_key, &owner_key).unwrap(),
+            vec![
+                &mut account2_account,
+                &mut mint2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // missing owner
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                set_owner(&program_id, &account_key, &owner_key, &owner2_key, &[]).unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut owner_account,
+                    &mut owner2_account,
+                ],
+            )
+        );
+
+        // owner did not sign
+        let mut instruction =
+            set_owner(&program_id, &account_key, &owner2_key, &owner_key, &[]).unwrap();
+        instruction.accounts[2].is_signer = false;
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            do_process_instruction(
+                instruction,
+                vec![
+                    &mut account_account,
+                    &mut owner2_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+
+        // set owner
+        do_process_instruction(
+            set_owner(&program_id, &account_key, &owner2_key, &owner_key, &[]).unwrap(),
+            vec![
+                &mut account_account,
+                &mut owner2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // create new mint with owner
+        do_process_instruction(
+            initialize_mint(
+                &program_id,
+                &mint_key,
+                Some(&account_key),
+                Some(&owner_key),
+                1000,
+                2,
+            )
+            .unwrap(),
+            vec![&mut mint_account, &mut account_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // wrong account
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                set_owner(&program_id, &mint_key, &owner3_key, &owner2_key, &[]).unwrap(),
+                vec![&mut mint_account, &mut owner3_account, &mut owner2_account],
+            )
+        );
+
+        // owner did not sign
+        let mut instruction =
+            set_owner(&program_id, &mint_key, &owner2_key, &owner_key, &[]).unwrap();
+        instruction.accounts[2].is_signer = false;
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            do_process_instruction(
+                instruction,
+                vec![&mut mint_account, &mut owner2_account, &mut owner_account],
+            )
+        );
+
+        // set owner
+        do_process_instruction(
+            set_owner(&program_id, &mint_key, &owner2_key, &owner_key, &[]).unwrap(),
+            vec![&mut mint_account, &mut owner2_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create new mint without owner
+        do_process_instruction(
+            initialize_mint(&program_id, &mint2_key, Some(&account2_key), None, 1000, 2).unwrap(),
+            vec![&mut mint2_account, &mut account2_account],
+        )
+        .unwrap();
+
+        // set owner for non-mint-able token
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                set_owner(&program_id, &mint2_key, &owner2_key, &owner_key, &[]).unwrap(),
+                vec![&mut mint_account, &mut owner2_account, &mut owner_account],
+            )
+        );
+    }
+
+    #[test]
+    fn test_mint_to() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account3_key = pubkey_rand();
+        let mut account3_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let mismatch_key = pubkey_rand();
+        let mut mismatch_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let owner2_key = pubkey_rand();
+        let mut owner2_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let mint2_key = pubkey_rand();
+        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let uninitialized_key = pubkey_rand();
+        let mut uninitialized_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account2_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account3_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account3_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create mismatch account
+        do_process_instruction(
+            initialize_account(&program_id, &mismatch_key, &mint2_key, &owner_key).unwrap(),
+            vec![
+                &mut mismatch_account,
+                &mut mint2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // create new mint with owner
+        do_process_instruction(
+            initialize_mint(
+                &program_id,
+                &mint_key,
+                Some(&account_key),
+                Some(&owner_key),
+                1000,
+                2,
+            )
+            .unwrap(),
+            vec![&mut mint_account, &mut account_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // mint to
+        do_process_instruction(
+            mint_to(&program_id, &mint_key, &account2_key, &owner_key, &[], 42).unwrap(),
+            vec![&mut mint_account, &mut account2_account, &mut owner_account],
+        )
+        .unwrap();
+
+        let _: &mut Mint = state::unpack(&mut mint_account.data).unwrap();
+        let dest_account: &mut Account = state::unpack(&mut account2_account.data).unwrap();
+        assert_eq!(dest_account.amount, 42);
+
+        // missing signer
+        let mut instruction =
+            mint_to(&program_id, &mint_key, &account2_key, &owner_key, &[], 42).unwrap();
+        instruction.accounts[2].is_signer = false;
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            do_process_instruction(
+                instruction,
+                vec![&mut mint_account, &mut account2_account, &mut owner_account],
+            )
+        );
+
+        // mismatch account
+        assert_eq!(
+            Err(TokenError::MintMismatch.into()),
+            do_process_instruction(
+                mint_to(&program_id, &mint_key, &mismatch_key, &owner_key, &[], 42).unwrap(),
+                vec![&mut mint_account, &mut mismatch_account, &mut owner_account],
+            )
+        );
+
+        // missing owner
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                mint_to(&program_id, &mint_key, &account2_key, &owner2_key, &[], 42).unwrap(),
+                vec![
+                    &mut mint_account,
+                    &mut account2_account,
+                    &mut owner2_account,
+                ],
+            )
+        );
+
+        // uninitialized destination account
+        assert_eq!(
+            Err(TokenError::UninitializedState.into()),
+            do_process_instruction(
+                mint_to(
+                    &program_id,
+                    &mint_key,
+                    &uninitialized_key,
+                    &owner_key,
+                    &[],
+                    42
+                )
+                .unwrap(),
+                vec![
+                    &mut mint_account,
+                    &mut uninitialized_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+    }
+
+    #[test]
+    fn test_burn() {
+        let program_id = pubkey_rand();
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account3_key = pubkey_rand();
+        let mut account3_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let delegate_key = pubkey_rand();
+        let mut delegate_account = SolanaAccount::default();
+        let mismatch_key = pubkey_rand();
+        let mut mismatch_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let owner2_key = pubkey_rand();
+        let mut owner2_account = SolanaAccount::default();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let mint2_key = pubkey_rand();
+        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+
+        // create account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account2_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create another account
+        do_process_instruction(
+            initialize_account(&program_id, &account3_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account3_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // create mismatch account
+        do_process_instruction(
+            initialize_account(&program_id, &mismatch_key, &mint2_key, &owner_key).unwrap(),
+            vec![
+                &mut mismatch_account,
+                &mut mint2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // create new mint
+        do_process_instruction(
+            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
+            vec![&mut mint_account, &mut account_account],
+        )
+        .unwrap();
+
+        // missing signer
+        let mut instruction = burn(&program_id, &account_key, &delegate_key, &[], 42).unwrap();
+        instruction.accounts[1].is_signer = false;
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                instruction,
+                vec![&mut account_account, &mut delegate_account],
+            )
+        );
+
+        // missing owner
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                burn(&program_id, &account_key, &owner2_key, &[], 42).unwrap(),
+                vec![&mut account_account, &mut owner2_account],
+            )
+        );
+
+        // burn
+        do_process_instruction(
+            burn(&program_id, &account_key, &owner_key, &[], 42).unwrap(),
+            vec![&mut account_account, &mut owner_account],
+        )
+        .unwrap();
+
+        let _: &mut Mint = state::unpack(&mut mint_account.data).unwrap();
+        let account: &mut Account = state::unpack(&mut account_account.data).unwrap();
+        assert_eq!(account.amount, 1000 - 42);
+
+        // insufficient funds
+        assert_eq!(
+            Err(TokenError::InsufficientFunds.into()),
+            do_process_instruction(
+                burn(&program_id, &account_key, &owner_key, &[], 100_000_000).unwrap(),
+                vec![&mut account_account, &mut owner_account],
+            )
+        );
+
+        // approve delegate
+        do_process_instruction(
+            approve(
+                &program_id,
+                &account_key,
+                &delegate_key,
+                &owner_key,
+                &[],
+                84,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut delegate_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        // not a delegate of source account
+        assert_eq!(
+            Err(TokenError::InsufficientFunds.into()),
+            do_process_instruction(
+                burn(&program_id, &account_key, &owner_key, &[], 100_000_000).unwrap(),
+                vec![&mut account_account, &mut owner_account],
+            )
+        );
+
+        // burn via delegate
+        do_process_instruction(
+            burn(&program_id, &account_key, &delegate_key, &[], 84).unwrap(),
+            vec![&mut account_account, &mut delegate_account],
+        )
+        .unwrap();
+
+        // match
+        let _: &mut Mint = state::unpack(&mut mint_account.data).unwrap();
+        let account: &mut Account = state::unpack(&mut account_account.data).unwrap();
+        assert_eq!(account.amount, 1000 - 42 - 84);
+
+        // insufficient funds approved via delegate
+        assert_eq!(
+            Err(TokenError::OwnerMismatch.into()),
+            do_process_instruction(
+                burn(&program_id, &account_key, &delegate_key, &[], 100).unwrap(),
+                vec![&mut account_account, &mut delegate_account],
+            )
+        );
+    }
+
+    #[test]
+    fn test_multisig() {
+        let program_id = pubkey_rand();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let account_key = pubkey_rand();
+        let mut account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let multisig_key = pubkey_rand();
+        let mut multisig_account = SolanaAccount::new(0, size_of::<Multisig>(), &program_id);
+        let multisig_delegate_key = pubkey_rand();
+        let mut multisig_delegate_account =
+            SolanaAccount::new(0, size_of::<Multisig>(), &program_id);
+        let signer_keys = vec![pubkey_rand(); MAX_SIGNERS];
+        let signer_key_refs: Vec<&Pubkey> = signer_keys.iter().map(|key| key).collect();
+        let mut signer_accounts = vec![SolanaAccount::new(0, 0, &program_id); MAX_SIGNERS];
+
+        // single signer
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            initialize_multisig(&program_id, &multisig_key, &[&signer_keys[0]], 1).unwrap(),
+            vec![
+                &mut multisig_account,
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // multiple signer
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            initialize_multisig(
+                &program_id,
+                &multisig_delegate_key,
+                &signer_key_refs,
+                MAX_SIGNERS as u8,
+            )
+            .unwrap(),
+            vec![
+                &mut multisig_delegate_account,
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // create account with multisig owner
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &multisig_key).unwrap(),
+            vec![&mut account, &mut mint_account, &mut multisig_account],
+        )
+        .unwrap();
+
+        // create another account with multisig owner
+        do_process_instruction(
+            initialize_account(
+                &program_id,
+                &account2_key,
+                &mint_key,
+                &multisig_delegate_key,
+            )
+            .unwrap(),
+            vec![
+                &mut account2_account,
+                &mut mint_account,
+                &mut multisig_account,
+            ],
+        )
+        .unwrap();
+
+        // create new m int with multisig owner
+        do_process_instruction(
+            initialize_mint(
+                &program_id,
+                &mint_key,
+                Some(&account_key),
+                Some(&multisig_key),
+                1000,
+                2,
+            )
+            .unwrap(),
+            vec![&mut mint_account, &mut account, &mut multisig_account],
+        )
+        .unwrap();
+
+        // approve
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            approve(
+                &program_id,
+                &account_key,
+                &multisig_delegate_key,
+                &multisig_key,
+                &[&signer_keys[0]],
+                100,
+            )
+            .unwrap(),
+            vec![
+                &mut account,
+                &mut multisig_delegate_account,
+                &mut multisig_account,
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // transfer
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account_key,
+                &account2_key,
+                &multisig_key,
+                &[&signer_keys[0]],
+                42,
+            )
+            .unwrap(),
+            vec![
+                &mut account,
+                &mut account2_account,
+                &mut multisig_account,
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // transfer via delegate
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account_key,
+                &account2_key,
+                &multisig_delegate_key,
+                &signer_key_refs,
+                42,
+            )
+            .unwrap(),
+            vec![
+                &mut account,
+                &mut account2_account,
+                &mut multisig_delegate_account,
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // mint to
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            mint_to(
+                &program_id,
+                &mint_key,
+                &account2_key,
+                &multisig_key,
+                &[&signer_keys[0]],
+                42,
+            )
+            .unwrap(),
+            vec![
+                &mut mint_account,
+                &mut account2_account,
+                &mut multisig_account,
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // burn
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            burn(
+                &program_id,
+                &account_key,
+                &multisig_key,
+                &[&signer_keys[0]],
+                42,
+            )
+            .unwrap(),
+            vec![
+                &mut account,
+                &mut multisig_account,
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // burn via delegate
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            burn(
+                &program_id,
+                &account_key,
+                &multisig_delegate_key,
+                &signer_key_refs,
+                42,
+            )
+            .unwrap(),
+            vec![
+                &mut account,
+                &mut multisig_delegate_account,
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // do SetOwner on mint
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            set_owner(
+                &program_id,
+                &mint_key,
+                &owner_key,
+                &multisig_key,
+                &[&signer_keys[0]],
+            )
+            .unwrap(),
+            vec![
+                &mut mint_account,
+                &mut owner_account,
+                &mut multisig_account,
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+
+        // do SetOwner on account
+        let account_info_iter = &mut signer_accounts.iter_mut();
+        do_process_instruction(
+            set_owner(
+                &program_id,
+                &account_key,
+                &owner_key,
+                &multisig_key,
+                &[&signer_keys[0]],
+            )
+            .unwrap(),
+            vec![
+                &mut account,
+                &mut owner_account,
+                &mut multisig_account,
+                &mut account_info_iter.next().unwrap(),
+            ],
+        )
+        .unwrap();
+    }
+
+    #[test]
+    fn test_validate_owner() {
+        let program_id = pubkey_rand();
+        let owner_key = pubkey_rand();
+        let mut signer_keys = [Pubkey::default(); MAX_SIGNERS];
+        for signer_key in signer_keys.iter_mut().take(MAX_SIGNERS) {
+            *signer_key = pubkey_rand();
+        }
+        let mut signer_lamports = 0;
+        let mut signer_data = vec![];
+        let mut signers = vec![
+            AccountInfo::new(
+                &owner_key,
+                true,
+                false,
+                &mut signer_lamports,
+                &mut signer_data,
+                &program_id,
+                false,
+                Epoch::default(),
+            );
+            MAX_SIGNERS + 1
+        ];
+        for (signer, key) in signers.iter_mut().zip(&signer_keys) {
+            signer.key = key;
+        }
+        let mut lamports = 0;
+        let mut data = vec![0; size_of::<Multisig>()];
+        let mut multisig: &mut Multisig = state::unpack_unchecked(&mut data).unwrap();
+        multisig.m = MAX_SIGNERS as u8;
+        multisig.n = MAX_SIGNERS as u8;
+        multisig.signers = signer_keys;
+        multisig.is_initialized = true;
+        let owner_account_info = AccountInfo::new(
+            &owner_key,
+            false,
+            false,
+            &mut lamports,
+            &mut data,
+            &program_id,
+            false,
+            Epoch::default(),
+        );
+
+        // full 11 of 11
+        Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &signers).unwrap();
+
+        // 1 of 11
+        {
+            let mut data_ref_mut = owner_account_info.data.borrow_mut();
+            let mut multisig: &mut Multisig = state::unpack(&mut data_ref_mut).unwrap();
+            multisig.m = 1;
+        }
+        Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &signers).unwrap();
+
+        // 2:1
+        {
+            let mut data_ref_mut = owner_account_info.data.borrow_mut();
+            let mut multisig: &mut Multisig = state::unpack(&mut data_ref_mut).unwrap();
+            multisig.m = 2;
+            multisig.n = 1;
+        }
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &signers)
+        );
+
+        // 0:11
+        {
+            let mut data_ref_mut = owner_account_info.data.borrow_mut();
+            let mut multisig: &mut Multisig = state::unpack(&mut data_ref_mut).unwrap();
+            multisig.m = 0;
+            multisig.n = 11;
+        }
+        Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &signers).unwrap();
+
+        // 2:11 but 0 provided
+        {
+            let mut data_ref_mut = owner_account_info.data.borrow_mut();
+            let mut multisig: &mut Multisig = state::unpack(&mut data_ref_mut).unwrap();
+            multisig.m = 2;
+            multisig.n = 11;
+        }
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &[])
+        );
+        // 2:11 but 1 provided
+        {
+            let mut data_ref_mut = owner_account_info.data.borrow_mut();
+            let mut multisig: &mut Multisig = state::unpack(&mut data_ref_mut).unwrap();
+            multisig.m = 2;
+            multisig.n = 11;
+        }
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &signers[0..1])
+        );
+
+        // 2:11, 2 from middle provided
+        {
+            let mut data_ref_mut = owner_account_info.data.borrow_mut();
+            let mut multisig: &mut Multisig = state::unpack(&mut data_ref_mut).unwrap();
+            multisig.m = 2;
+            multisig.n = 11;
+        }
+        Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &signers[5..7])
+            .unwrap();
+
+        // 11:11, one is not a signer
+        {
+            let mut data_ref_mut = owner_account_info.data.borrow_mut();
+            let mut multisig: &mut Multisig = state::unpack(&mut data_ref_mut).unwrap();
+            multisig.m = 2;
+            multisig.n = 11;
+        }
+        signers[5].is_signer = false;
+        assert_eq!(
+            Err(ProgramError::MissingRequiredSignature),
+            Processor::validate_owner(&program_id, &owner_key, &owner_account_info, &signers)
+        );
+        signers[5].is_signer = true;
+    }
+
+    #[test]
+    fn test_close_account() {
+        let program_id = pubkey_rand();
+        let mint_key = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(42, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(2, size_of::<Account>(), &program_id);
+        let account3_key = pubkey_rand();
+        let mut account3_account = SolanaAccount::new(2, size_of::<Account>(), &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+        let owner2_key = pubkey_rand();
+        let mut owner2_account = SolanaAccount::default();
+
+        // uninitialized
+        assert_eq!(
+            Err(TokenError::UninitializedState.into()),
+            do_process_instruction(
+                close_account(&program_id, &account_key, &account3_key, &owner2_key, &[]).unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut account3_account,
+                    &mut owner2_account,
+                ],
+            )
+        );
+
+        // initialize non-native account
+        do_process_instruction(
+            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
+            vec![&mut account_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+
+        // initialize native account
+        do_process_instruction(
+            initialize_account(
+                &program_id,
+                &account2_key,
+                &crate::native_mint::id(),
+                &owner_key,
+            )
+            .unwrap(),
+            vec![&mut account2_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+        let account: &mut Account = state::unpack(&mut account2_account.data).unwrap();
+        assert!(account.is_native);
+        assert_eq!(account.amount, 2);
+
+        // close non-native account
+        assert_eq!(
+            Err(TokenError::NonNativeNotSupported.into()),
+            do_process_instruction(
+                close_account(&program_id, &account_key, &account3_key, &owner_key, &[]).unwrap(),
+                vec![
+                    &mut account_account,
+                    &mut account3_account,
+                    &mut owner_account,
+                ],
+            )
+        );
+        assert_eq!(account_account.lamports, 42);
+
+        // close native account
+        do_process_instruction(
+            close_account(&program_id, &account2_key, &account3_key, &owner_key, &[]).unwrap(),
+            vec![
+                &mut account2_account,
+                &mut account3_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+        let account: &mut Account = state::unpack_unchecked(&mut account2_account.data).unwrap();
+        assert!(account.is_native);
+        assert_eq!(account.amount, 0);
+        assert_eq!(account3_account.lamports, 4);
+    }
+
+    #[test]
+    fn test_native_token() {
+        let program_id = pubkey_rand();
+        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
+        let account_key = pubkey_rand();
+        let mut account_account = SolanaAccount::new(42, size_of::<Account>(), &program_id);
+        let account2_key = pubkey_rand();
+        let mut account2_account = SolanaAccount::new(2, size_of::<Account>(), &program_id);
+        let account3_key = pubkey_rand();
+        let mut account3_account = SolanaAccount::new(2, 0, &program_id);
+        let owner_key = pubkey_rand();
+        let mut owner_account = SolanaAccount::default();
+
+        // initialize native account
+        do_process_instruction(
+            initialize_account(
+                &program_id,
+                &account_key,
+                &crate::native_mint::id(),
+                &owner_key,
+            )
+            .unwrap(),
+            vec![&mut account_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+        let account: &mut Account = state::unpack(&mut account_account.data).unwrap();
+        assert!(account.is_native);
+        assert_eq!(account.amount, 42);
+
+        // initialize native account
+        do_process_instruction(
+            initialize_account(
+                &program_id,
+                &account2_key,
+                &crate::native_mint::id(),
+                &owner_key,
+            )
+            .unwrap(),
+            vec![&mut account2_account, &mut mint_account, &mut owner_account],
+        )
+        .unwrap();
+        let account: &mut Account = state::unpack(&mut account2_account.data).unwrap();
+        assert!(account.is_native);
+        assert_eq!(account.amount, 2);
+
+        // mint_to unsupported
+        assert_eq!(
+            Err(TokenError::NativeNotSupported.into()),
+            do_process_instruction(
+                mint_to(
+                    &program_id,
+                    &crate::native_mint::id(),
+                    &account_key,
+                    &owner_key,
+                    &[],
+                    42
+                )
+                .unwrap(),
+                vec![&mut mint_account, &mut account_account, &mut owner_account],
+            )
+        );
+
+        // burn unsupported
+        assert_eq!(
+            Err(TokenError::NativeNotSupported.into()),
+            do_process_instruction(
+                burn(&program_id, &account_key, &owner_key, &[], 42).unwrap(),
+                vec![&mut account_account, &mut owner_account],
+            )
+        );
+
+        // initialize native account
+        do_process_instruction(
+            transfer(
+                &program_id,
+                &account_key,
+                &account2_key,
+                &owner_key,
+                &[],
+                40,
+            )
+            .unwrap(),
+            vec![
+                &mut account_account,
+                &mut account2_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+
+        let account: &mut Account = state::unpack(&mut account_account.data).unwrap();
+        assert!(account.is_native);
+        assert_eq!(account_account.lamports, 2);
+        assert_eq!(account.amount, 2);
+        let account: &mut Account = state::unpack(&mut account2_account.data).unwrap();
+        assert!(account.is_native);
+        assert_eq!(account2_account.lamports, 42);
+        assert_eq!(account.amount, 42);
+
+        // close native account
+        do_process_instruction(
+            close_account(&program_id, &account_key, &account3_key, &owner_key, &[]).unwrap(),
+            vec![
+                &mut account_account,
+                &mut account3_account,
+                &mut owner_account,
+            ],
+        )
+        .unwrap();
+        let account: &mut Account = state::unpack_unchecked(&mut account_account.data).unwrap();
+        assert!(account.is_native);
+        assert_eq!(account_account.lamports, 0);
+        assert_eq!(account.amount, 0);
+        assert_eq!(account3_account.lamports, 4);
+    }
 }
diff --git a/token/src/state.rs b/token/src/state.rs
index 54ef98e9199259..3b63f4fb81c402 100644
--- a/token/src/state.rs
+++ b/token/src/state.rs
@@ -1,14 +1,7 @@
 //! State transition types
 
-use crate::{
-    error::TokenError,
-    instruction::{is_valid_signer_index, TokenInstruction, MAX_SIGNERS},
-    option::COption,
-};
-use solana_sdk::{
-    account_info::next_account_info, account_info::AccountInfo, entrypoint::ProgramResult, info,
-    program_error::ProgramError, pubkey::Pubkey,
-};
+use crate::{error::TokenError, instruction::MAX_SIGNERS, option::COption};
+use solana_sdk::{program_error::ProgramError, pubkey::Pubkey};
 use std::mem::size_of;
 
 /// Mint data.
@@ -75,2150 +68,25 @@ impl IsInitialized for Multisig {
     }
 }
 
-/// Program state handler.
-pub enum State {}
-impl State {
-    /// Processes an [InitializeMint](enum.TokenInstruction.html) instruction.
-    pub fn process_initialize_mint(
-        accounts: &[AccountInfo],
-        amount: u64,
-        decimals: u8,
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let mint_info = next_account_info(account_info_iter)?;
-
-        let mut mint_info_data = mint_info.data.borrow_mut();
-        let mut mint: &mut Mint = Self::unpack_unchecked(&mut mint_info_data)?;
-        if mint.is_initialized {
-            return Err(TokenError::AlreadyInUse.into());
-        }
-
-        let owner = if amount != 0 {
-            let dest_account_info = next_account_info(account_info_iter)?;
-            let mut dest_account_data = dest_account_info.data.borrow_mut();
-            let mut dest_account: &mut Account = Self::unpack(&mut dest_account_data)?;
-
-            if mint_info.key != &dest_account.mint {
-                return Err(TokenError::MintMismatch.into());
-            }
-
-            dest_account.amount = amount;
-
-            if let Ok(owner_info) = next_account_info(account_info_iter) {
-                COption::Some(*owner_info.key)
-            } else {
-                COption::None
-            }
-        } else if let Ok(owner_info) = next_account_info(account_info_iter) {
-            COption::Some(*owner_info.key)
-        } else {
-            return Err(TokenError::OwnerRequiredIfNoInitialSupply.into());
-        };
-
-        mint.owner = owner;
-        mint.decimals = decimals;
-        mint.is_initialized = true;
-
-        Ok(())
-    }
-
-    /// Processes an [InitializeAccount](enum.TokenInstruction.html) instruction.
-    pub fn process_initialize_account(accounts: &[AccountInfo]) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let new_account_info = next_account_info(account_info_iter)?;
-        let mint_info = next_account_info(account_info_iter)?;
-        let owner_info = next_account_info(account_info_iter)?;
-
-        let mut new_account_data = new_account_info.data.borrow_mut();
-        let mut account: &mut Account = Self::unpack_unchecked(&mut new_account_data)?;
-        if account.is_initialized {
-            return Err(TokenError::AlreadyInUse.into());
-        }
-
-        account.mint = *mint_info.key;
-        account.owner = *owner_info.key;
-        account.delegate = COption::None;
-        account.delegated_amount = 0;
-        account.is_initialized = true;
-        if *mint_info.key == crate::native_mint::id() {
-            account.is_native = true;
-            account.amount = new_account_info.lamports();
-        } else {
-            account.is_native = false;
-            account.amount = 0;
-        };
-
-        Ok(())
-    }
-
-    /// Processes a [InitializeMultisig](enum.TokenInstruction.html) instruction.
-    pub fn process_initialize_multisig(accounts: &[AccountInfo], m: u8) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let multisig_info = next_account_info(account_info_iter)?;
-        let mut multisig_account_data = multisig_info.data.borrow_mut();
-        let mut multisig: &mut Multisig = Self::unpack_unchecked(&mut multisig_account_data)?;
-        if multisig.is_initialized {
-            return Err(TokenError::AlreadyInUse.into());
-        }
-
-        let signer_infos = account_info_iter.as_slice();
-        multisig.m = m;
-        multisig.n = signer_infos.len() as u8;
-        if !is_valid_signer_index(multisig.n as usize) {
-            return Err(TokenError::InvalidNumberOfProvidedSigners.into());
-        }
-        if !is_valid_signer_index(multisig.m as usize) {
-            return Err(TokenError::InvalidNumberOfRequiredSigners.into());
-        }
-        for (i, signer_info) in signer_infos.iter().enumerate() {
-            multisig.signers[i] = *signer_info.key;
-        }
-        multisig.is_initialized = true;
-
-        Ok(())
-    }
-
-    /// Processes a [Transfer](enum.TokenInstruction.html) instruction.
-    pub fn process_transfer(
-        program_id: &Pubkey,
-        accounts: &[AccountInfo],
-        amount: u64,
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let source_account_info = next_account_info(account_info_iter)?;
-        let dest_account_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-
-        let mut source_data = source_account_info.data.borrow_mut();
-        let mut source_account: &mut Account = Self::unpack(&mut source_data)?;
-        let mut dest_data = dest_account_info.data.borrow_mut();
-        let mut dest_account: &mut Account = Self::unpack(&mut dest_data)?;
-
-        if source_account.amount < amount {
-            return Err(TokenError::InsufficientFunds.into());
-        }
-        if source_account.mint != dest_account.mint {
-            return Err(TokenError::MintMismatch.into());
-        }
-
-        match source_account.delegate {
-            COption::Some(ref delegate) if authority_info.key == delegate => {
-                Self::validate_owner(
-                    program_id,
-                    delegate,
-                    authority_info,
-                    account_info_iter.as_slice(),
-                )?;
-                if source_account.delegated_amount < amount {
-                    return Err(TokenError::InsufficientFunds.into());
-                }
-                source_account.delegated_amount -= amount;
-                if source_account.delegated_amount == 0 {
-                    source_account.delegate = COption::None;
-                }
-            }
-            _ => Self::validate_owner(
-                program_id,
-                &source_account.owner,
-                authority_info,
-                account_info_iter.as_slice(),
-            )?,
-        };
-
-        source_account.amount -= amount;
-        dest_account.amount += amount;
-
-        if source_account.is_native {
-            **source_account_info.lamports.borrow_mut() -= amount;
-            **dest_account_info.lamports.borrow_mut() += amount;
-        }
-
-        Ok(())
-    }
-
-    /// Processes an [Approve](enum.TokenInstruction.html) instruction.
-    pub fn process_approve(
-        program_id: &Pubkey,
-        accounts: &[AccountInfo],
-        amount: u64,
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let source_account_info = next_account_info(account_info_iter)?;
-
-        let mut source_data = source_account_info.data.borrow_mut();
-        let mut source_account: &mut Account = Self::unpack(&mut source_data)?;
-        let delegate_info = next_account_info(account_info_iter)?;
-        let owner_info = next_account_info(account_info_iter)?;
-
-        Self::validate_owner(
-            program_id,
-            &source_account.owner,
-            owner_info,
-            account_info_iter.as_slice(),
-        )?;
-
-        source_account.delegate = COption::Some(*delegate_info.key);
-        source_account.delegated_amount = amount;
-
-        Ok(())
-    }
-
-    /// Processes an [Revoke](enum.TokenInstruction.html) instruction.
-    pub fn process_revoke(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let source_account_info = next_account_info(account_info_iter)?;
-
-        let mut source_data = source_account_info.data.borrow_mut();
-        let mut source_account: &mut Account = Self::unpack(&mut source_data)?;
-        let owner_info = next_account_info(account_info_iter)?;
-
-        Self::validate_owner(
-            program_id,
-            &source_account.owner,
-            owner_info,
-            account_info_iter.as_slice(),
-        )?;
-
-        source_account.delegate = COption::None;
-        source_account.delegated_amount = 0;
-
-        Ok(())
-    }
-
-    /// Processes a [SetOwner](enum.TokenInstruction.html) instruction.
-    pub fn process_set_owner(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let account_info = next_account_info(account_info_iter)?;
-        let new_owner_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-
-        if account_info.data_len() == size_of::<Account>() {
-            let mut account_data = account_info.data.borrow_mut();
-            let mut account: &mut Account = Self::unpack(&mut account_data)?;
-
-            Self::validate_owner(
-                program_id,
-                &account.owner,
-                authority_info,
-                account_info_iter.as_slice(),
-            )?;
-
-            account.owner = *new_owner_info.key;
-        } else if account_info.data_len() == size_of::<Mint>() {
-            let mut account_data = account_info.data.borrow_mut();
-            let mut mint: &mut Mint = Self::unpack(&mut account_data)?;
-
-            match mint.owner {
-                COption::Some(ref owner) => {
-                    Self::validate_owner(
-                        program_id,
-                        owner,
-                        authority_info,
-                        account_info_iter.as_slice(),
-                    )?;
-                }
-                COption::None => return Err(TokenError::FixedSupply.into()),
-            }
-            mint.owner = COption::Some(*new_owner_info.key);
-        } else {
-            return Err(ProgramError::InvalidArgument);
-        }
-
-        Ok(())
-    }
-
-    /// Processes a [MintTo](enum.TokenInstruction.html) instruction.
-    pub fn process_mint_to(
-        program_id: &Pubkey,
-        accounts: &[AccountInfo],
-        amount: u64,
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let mint_info = next_account_info(account_info_iter)?;
-        let dest_account_info = next_account_info(account_info_iter)?;
-        let owner_info = next_account_info(account_info_iter)?;
-
-        let mut dest_account_data = dest_account_info.data.borrow_mut();
-        let mut dest_account: &mut Account = Self::unpack(&mut dest_account_data)?;
-
-        if dest_account.is_native {
-            return Err(TokenError::NativeNotSupported.into());
-        }
-        if mint_info.key != &dest_account.mint {
-            return Err(TokenError::MintMismatch.into());
-        }
-
-        let mut mint_info_data = mint_info.data.borrow_mut();
-        let mint: &mut Mint = Self::unpack(&mut mint_info_data)?;
-
-        match mint.owner {
-            COption::Some(owner) => {
-                Self::validate_owner(program_id, &owner, owner_info, account_info_iter.as_slice())?;
-            }
-            COption::None => {
-                return Err(TokenError::FixedSupply.into());
-            }
-        }
-
-        dest_account.amount += amount;
-
-        Ok(())
-    }
-
-    /// Processes a [Burn](enum.TokenInstruction.html) instruction.
-    pub fn process_burn(
-        program_id: &Pubkey,
-        accounts: &[AccountInfo],
-        amount: u64,
-    ) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let source_account_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-
-        let mut source_data = source_account_info.data.borrow_mut();
-        let source_account: &mut Account = Self::unpack(&mut source_data)?;
-
-        if source_account.is_native {
-            return Err(TokenError::NativeNotSupported.into());
-        }
-        if source_account.amount < amount {
-            return Err(TokenError::InsufficientFunds.into());
-        }
-
-        match source_account.delegate {
-            COption::Some(ref delegate) if authority_info.key == delegate => {
-                Self::validate_owner(
-                    program_id,
-                    delegate,
-                    authority_info,
-                    account_info_iter.as_slice(),
-                )?;
-
-                if source_account.delegated_amount < amount {
-                    return Err(TokenError::InsufficientFunds.into());
-                }
-                source_account.delegated_amount -= amount;
-                if source_account.delegated_amount == 0 {
-                    source_account.delegate = COption::None;
-                }
-            }
-            _ => Self::validate_owner(
-                program_id,
-                &source_account.owner,
-                authority_info,
-                account_info_iter.as_slice(),
-            )?,
-        }
-
-        source_account.amount -= amount;
-
-        Ok(())
-    }
-
-    /// Processes a [CloseAccount](enum.TokenInstruction.html) instruction.
-    pub fn process_close_account(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
-        let account_info_iter = &mut accounts.iter();
-        let source_account_info = next_account_info(account_info_iter)?;
-        let dest_account_info = next_account_info(account_info_iter)?;
-        let authority_info = next_account_info(account_info_iter)?;
-
-        let mut source_data = source_account_info.data.borrow_mut();
-        let source_account: &mut Account = Self::unpack(&mut source_data)?;
-
-        if !source_account.is_native {
-            return Err(TokenError::NonNativeNotSupported.into());
-        }
-
-        Self::validate_owner(
-            program_id,
-            &source_account.owner,
-            authority_info,
-            account_info_iter.as_slice(),
-        )?;
-
-        **dest_account_info.lamports.borrow_mut() += source_account_info.lamports();
-        **source_account_info.lamports.borrow_mut() = 0;
-        source_account.amount = 0;
-
-        Ok(())
-    }
-
-    /// Processes an [Instruction](enum.Instruction.html).
-    pub fn process(program_id: &Pubkey, accounts: &[AccountInfo], input: &[u8]) -> ProgramResult {
-        let instruction = TokenInstruction::unpack(input)?;
-
-        match instruction {
-            TokenInstruction::InitializeMint { amount, decimals } => {
-                info!("Instruction: InitializeMint");
-                Self::process_initialize_mint(accounts, amount, decimals)
-            }
-            TokenInstruction::InitializeAccount => {
-                info!("Instruction: InitializeAccount");
-                Self::process_initialize_account(accounts)
-            }
-            TokenInstruction::InitializeMultisig { m } => {
-                info!("Instruction: InitializeMultisig");
-                Self::process_initialize_multisig(accounts, m)
-            }
-            TokenInstruction::Transfer { amount } => {
-                info!("Instruction: Transfer");
-                Self::process_transfer(program_id, accounts, amount)
-            }
-            TokenInstruction::Approve { amount } => {
-                info!("Instruction: Approve");
-                Self::process_approve(program_id, accounts, amount)
-            }
-            TokenInstruction::Revoke => {
-                info!("Instruction: Revoke");
-                Self::process_revoke(program_id, accounts)
-            }
-            TokenInstruction::SetOwner => {
-                info!("Instruction: SetOwner");
-                Self::process_set_owner(program_id, accounts)
-            }
-            TokenInstruction::MintTo { amount } => {
-                info!("Instruction: MintTo");
-                Self::process_mint_to(program_id, accounts, amount)
-            }
-            TokenInstruction::Burn { amount } => {
-                info!("Instruction: Burn");
-                Self::process_burn(program_id, accounts, amount)
-            }
-            TokenInstruction::CloseAccount => {
-                info!("Instruction: CloseAccount");
-                Self::process_close_account(program_id, accounts)
-            }
-        }
-    }
-
-    /// Validates owner(s) are present
-    pub fn validate_owner(
-        program_id: &Pubkey,
-        expected_owner: &Pubkey,
-        owner_account_info: &AccountInfo,
-        signers: &[AccountInfo],
-    ) -> ProgramResult {
-        if expected_owner != owner_account_info.key {
-            return Err(TokenError::OwnerMismatch.into());
-        }
-        if program_id == owner_account_info.owner
-            && owner_account_info.data_len() == std::mem::size_of::<Multisig>()
-        {
-            let mut owner_data = owner_account_info.data.borrow_mut();
-            let multisig: &mut Multisig = Self::unpack(&mut owner_data)?;
-            let mut num_signers = 0;
-            for signer in signers.iter() {
-                if multisig.signers[0..multisig.n as usize].contains(signer.key) {
-                    if !signer.is_signer {
-                        return Err(ProgramError::MissingRequiredSignature);
-                    }
-                    num_signers += 1;
-                }
-            }
-            if num_signers < multisig.m {
-                return Err(ProgramError::MissingRequiredSignature);
-            }
-        } else if !owner_account_info.is_signer {
-            return Err(ProgramError::MissingRequiredSignature);
-        }
-        Ok(())
-    }
-
-    /// Unpacks a token state from a bytes buffer while assuring that the state is initialized.
-    pub fn unpack<T: IsInitialized>(input: &mut [u8]) -> Result<&mut T, ProgramError> {
-        let mut_ref: &mut T = Self::unpack_unchecked(input)?;
-        if !mut_ref.is_initialized() {
-            return Err(TokenError::UninitializedState.into());
-        }
-        Ok(mut_ref)
-    }
-    /// Unpacks a token state from a bytes buffer without checking that the state is initialized.
-    pub fn unpack_unchecked<T: IsInitialized>(input: &mut [u8]) -> Result<&mut T, ProgramError> {
-        if input.len() != size_of::<T>() {
-            return Err(ProgramError::InvalidAccountData);
-        }
-        #[allow(clippy::cast_ptr_alignment)]
-        Ok(unsafe { &mut *(&mut input[0] as *mut u8 as *mut T) })
-    }
-}
-
 /// Check is a token state is initialized
 pub trait IsInitialized {
     /// Is initialized
     fn is_initialized(&self) -> bool;
 }
 
-// Pull in syscall stubs when building for non-BPF targets
-#[cfg(not(target_arch = "bpf"))]
-solana_sdk::program_stubs!();
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::instruction::{
-        approve, burn, close_account, initialize_account, initialize_mint, initialize_multisig,
-        mint_to, revoke, set_owner, transfer,
-    };
-    use solana_sdk::{
-        account::Account as SolanaAccount, account_info::create_is_signer_account_infos,
-        clock::Epoch, instruction::Instruction,
-    };
-
-    fn pubkey_rand() -> Pubkey {
-        Pubkey::new(&rand::random::<[u8; 32]>())
-    }
-
-    fn do_process_instruction(
-        instruction: Instruction,
-        accounts: Vec<&mut SolanaAccount>,
-    ) -> ProgramResult {
-        let mut meta = instruction
-            .accounts
-            .iter()
-            .zip(accounts)
-            .map(|(account_meta, account)| (&account_meta.pubkey, account_meta.is_signer, account))
-            .collect::<Vec<_>>();
-
-        let account_infos = create_is_signer_account_infos(&mut meta);
-        State::process(&instruction.program_id, &account_infos, &instruction.data)
+/// Unpacks a token state from a bytes buffer while assuring that the state is initialized.
+pub fn unpack<T: IsInitialized>(input: &mut [u8]) -> Result<&mut T, ProgramError> {
+    let mut_ref: &mut T = unpack_unchecked(input)?;
+    if !mut_ref.is_initialized() {
+        return Err(TokenError::UninitializedState.into());
     }
-
-    #[test]
-    fn test_unique_account_sizes() {
-        assert_ne!(size_of::<Mint>(), 0);
-        assert_ne!(size_of::<Mint>(), size_of::<Account>());
-        assert_ne!(size_of::<Mint>(), size_of::<Multisig>());
-        assert_ne!(size_of::<Account>(), 0);
-        assert_ne!(size_of::<Account>(), size_of::<Multisig>());
-        assert_ne!(size_of::<Multisig>(), 0);
-    }
-
-    #[test]
-    fn test_initialize_mint() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let mint2_key = pubkey_rand();
-        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-
-        // account not created
-        assert_eq!(
-            Err(TokenError::UninitializedState.into()),
-            do_process_instruction(
-                initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
-                vec![&mut mint_account, &mut account_account]
-            )
-        );
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut owner_account, &mut mint_account],
-        )
-        .unwrap();
-
-        // create new mint
-        do_process_instruction(
-            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
-            vec![&mut mint_account, &mut account_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account2_account, &mut owner_account, &mut mint_account],
-        )
-        .unwrap();
-
-        // mismatch account
-        assert_eq!(
-            Err(TokenError::MintMismatch.into()),
-            do_process_instruction(
-                initialize_mint(&program_id, &mint2_key, Some(&account2_key), None, 1000, 2)
-                    .unwrap(),
-                vec![&mut mint2_account, &mut account2_account]
-            )
-        );
-
-        // create twice
-        assert_eq!(
-            Err(TokenError::AlreadyInUse.into()),
-            do_process_instruction(
-                initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
-                vec![&mut mint_account, &mut account_account]
-            )
-        );
-    }
-
-    #[test]
-    fn test_initialize_mint_account() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create twice
-        assert_eq!(
-            Err(TokenError::AlreadyInUse.into()),
-            do_process_instruction(
-                initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-                vec![&mut account_account, &mut mint_account, &mut owner_account],
-            )
-        );
-    }
-
-    #[test]
-    fn test_transfer() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account3_key = pubkey_rand();
-        let mut account3_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let delegate_key = pubkey_rand();
-        let mut delegate_account = SolanaAccount::default();
-        let mismatch_key = pubkey_rand();
-        let mut mismatch_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let owner2_key = pubkey_rand();
-        let mut owner2_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let mint2_key = pubkey_rand();
-        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account2_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account3_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account3_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create mismatch account
-        do_process_instruction(
-            initialize_account(&program_id, &mismatch_key, &mint2_key, &owner_key).unwrap(),
-            vec![
-                &mut mismatch_account,
-                &mut mint2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // create new mint
-        do_process_instruction(
-            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
-            vec![&mut mint_account, &mut account_account],
-        )
-        .unwrap();
-
-        // missing signer
-        let mut instruction = transfer(
-            &program_id,
-            &account_key,
-            &account2_key,
-            &owner_key,
-            &[],
-            1000,
-        )
-        .unwrap();
-        instruction.accounts[2].is_signer = false;
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            do_process_instruction(
-                instruction,
-                vec![
-                    &mut account_account,
-                    &mut account2_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-
-        // mismatch mint
-        assert_eq!(
-            Err(TokenError::MintMismatch.into()),
-            do_process_instruction(
-                transfer(
-                    &program_id,
-                    &account_key,
-                    &mismatch_key,
-                    &owner_key,
-                    &[],
-                    1000
-                )
-                .unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut mismatch_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-
-        // missing owner
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                transfer(
-                    &program_id,
-                    &account_key,
-                    &account2_key,
-                    &owner2_key,
-                    &[],
-                    1000
-                )
-                .unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut account2_account,
-                    &mut owner2_account,
-                ],
-            )
-        );
-
-        // transfer
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account_key,
-                &account2_key,
-                &owner_key,
-                &[],
-                1000,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut account2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // insufficient funds
-        assert_eq!(
-            Err(TokenError::InsufficientFunds.into()),
-            do_process_instruction(
-                transfer(&program_id, &account_key, &account2_key, &owner_key, &[], 1).unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut account2_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-
-        // transfer half back
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account2_key,
-                &account_key,
-                &owner_key,
-                &[],
-                500,
-            )
-            .unwrap(),
-            vec![
-                &mut account2_account,
-                &mut account_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // transfer rest
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account2_key,
-                &account_key,
-                &owner_key,
-                &[],
-                500,
-            )
-            .unwrap(),
-            vec![
-                &mut account2_account,
-                &mut account_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // insufficient funds
-        assert_eq!(
-            Err(TokenError::InsufficientFunds.into()),
-            do_process_instruction(
-                transfer(&program_id, &account2_key, &account_key, &owner_key, &[], 1).unwrap(),
-                vec![
-                    &mut account2_account,
-                    &mut account_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-
-        // approve delegate
-        do_process_instruction(
-            approve(
-                &program_id,
-                &account_key,
-                &delegate_key,
-                &owner_key,
-                &[],
-                100,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut delegate_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // transfer via delegate
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account_key,
-                &account2_key,
-                &delegate_key,
-                &[],
-                100,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut account2_account,
-                &mut delegate_account,
-            ],
-        )
-        .unwrap();
-
-        // insufficient funds approved via delegate
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                transfer(
-                    &program_id,
-                    &account_key,
-                    &account2_key,
-                    &delegate_key,
-                    &[],
-                    100
-                )
-                .unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut account2_account,
-                    &mut delegate_account,
-                ],
-            )
-        );
-
-        // transfer rest
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account_key,
-                &account2_key,
-                &owner_key,
-                &[],
-                900,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut account2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // approve delegate
-        do_process_instruction(
-            approve(
-                &program_id,
-                &account_key,
-                &delegate_key,
-                &owner_key,
-                &[],
-                100,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut delegate_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // insufficient funds in source account via delegate
-        assert_eq!(
-            Err(TokenError::InsufficientFunds.into()),
-            do_process_instruction(
-                transfer(
-                    &program_id,
-                    &account_key,
-                    &account2_key,
-                    &delegate_key,
-                    &[],
-                    100
-                )
-                .unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut account2_account,
-                    &mut delegate_account,
-                ],
-            )
-        );
-    }
-
-    #[test]
-    fn test_mintable_token_with_zero_supply() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut owner_account, &mut mint_account],
-        )
-        .unwrap();
-
-        // create mint-able token without owner
-        let mut instruction =
-            initialize_mint(&program_id, &mint_key, None, Some(&owner_key), 0, 2).unwrap();
-        instruction.accounts.pop();
-        assert_eq!(
-            Err(TokenError::OwnerRequiredIfNoInitialSupply.into()),
-            do_process_instruction(instruction, vec![&mut mint_account])
-        );
-
-        // create mint-able token with zero supply
-        let amount = 0;
-        let decimals = 2;
-        do_process_instruction(
-            initialize_mint(
-                &program_id,
-                &mint_key,
-                None,
-                Some(&owner_key),
-                amount,
-                decimals,
-            )
-            .unwrap(),
-            vec![&mut mint_account, &mut account_account],
-        )
-        .unwrap();
-        let mint: &mut Mint = State::unpack(&mut mint_account.data).unwrap();
-        assert_eq!(
-            *mint,
-            Mint {
-                owner: COption::Some(owner_key),
-                decimals,
-                is_initialized: true,
-            }
-        );
-
-        // mint to
-        do_process_instruction(
-            mint_to(&program_id, &mint_key, &account_key, &owner_key, &[], 42).unwrap(),
-            vec![&mut mint_account, &mut account_account, &mut owner_account],
-        )
-        .unwrap();
-
-        let _: &mut Mint = State::unpack(&mut mint_account.data).unwrap();
-        let dest_account: &mut Account = State::unpack(&mut account_account.data).unwrap();
-        assert_eq!(dest_account.amount, 42);
-    }
-
-    #[test]
-    fn test_approve() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let delegate_key = pubkey_rand();
-        let mut delegate_account = SolanaAccount::default();
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let owner2_key = pubkey_rand();
-        let mut owner2_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut owner_account, &mut mint_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account2_account, &mut owner_account, &mut mint_account],
-        )
-        .unwrap();
-
-        // create new mint
-        do_process_instruction(
-            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
-            vec![&mut mint_account, &mut account_account],
-        )
-        .unwrap();
-
-        // missing signer
-        let mut instruction = approve(
-            &program_id,
-            &account_key,
-            &delegate_key,
-            &owner_key,
-            &[],
-            100,
-        )
-        .unwrap();
-        instruction.accounts[2].is_signer = false;
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            do_process_instruction(
-                instruction,
-                vec![
-                    &mut account_account,
-                    &mut delegate_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-
-        // no owner
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                approve(
-                    &program_id,
-                    &account_key,
-                    &delegate_key,
-                    &owner2_key,
-                    &[],
-                    100
-                )
-                .unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut delegate_account,
-                    &mut owner2_account,
-                ],
-            )
-        );
-
-        // approve delegate
-        do_process_instruction(
-            approve(
-                &program_id,
-                &account_key,
-                &delegate_key,
-                &owner_key,
-                &[],
-                100,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut delegate_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // revoke delegate
-        do_process_instruction(
-            revoke(&program_id, &account_key, &owner_key, &[]).unwrap(),
-            vec![&mut account_account, &mut owner_account],
-        )
-        .unwrap();
-    }
-
-    #[test]
-    fn test_set_owner() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let owner2_key = pubkey_rand();
-        let mut owner2_account = SolanaAccount::default();
-        let owner3_key = pubkey_rand();
-        let mut owner3_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let mint2_key = pubkey_rand();
-        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-
-        // invalid account
-        assert_eq!(
-            Err(TokenError::UninitializedState.into()),
-            do_process_instruction(
-                set_owner(&program_id, &account_key, &owner2_key, &owner_key, &[]).unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut owner2_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account2_key, &mint2_key, &owner_key).unwrap(),
-            vec![
-                &mut account2_account,
-                &mut mint2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // missing owner
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                set_owner(&program_id, &account_key, &owner_key, &owner2_key, &[]).unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut owner_account,
-                    &mut owner2_account,
-                ],
-            )
-        );
-
-        // owner did not sign
-        let mut instruction =
-            set_owner(&program_id, &account_key, &owner2_key, &owner_key, &[]).unwrap();
-        instruction.accounts[2].is_signer = false;
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            do_process_instruction(
-                instruction,
-                vec![
-                    &mut account_account,
-                    &mut owner2_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-
-        // set owner
-        do_process_instruction(
-            set_owner(&program_id, &account_key, &owner2_key, &owner_key, &[]).unwrap(),
-            vec![
-                &mut account_account,
-                &mut owner2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // create new mint with owner
-        do_process_instruction(
-            initialize_mint(
-                &program_id,
-                &mint_key,
-                Some(&account_key),
-                Some(&owner_key),
-                1000,
-                2,
-            )
-            .unwrap(),
-            vec![&mut mint_account, &mut account_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // wrong account
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                set_owner(&program_id, &mint_key, &owner3_key, &owner2_key, &[]).unwrap(),
-                vec![&mut mint_account, &mut owner3_account, &mut owner2_account],
-            )
-        );
-
-        // owner did not sign
-        let mut instruction =
-            set_owner(&program_id, &mint_key, &owner2_key, &owner_key, &[]).unwrap();
-        instruction.accounts[2].is_signer = false;
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            do_process_instruction(
-                instruction,
-                vec![&mut mint_account, &mut owner2_account, &mut owner_account],
-            )
-        );
-
-        // set owner
-        do_process_instruction(
-            set_owner(&program_id, &mint_key, &owner2_key, &owner_key, &[]).unwrap(),
-            vec![&mut mint_account, &mut owner2_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create new mint without owner
-        do_process_instruction(
-            initialize_mint(&program_id, &mint2_key, Some(&account2_key), None, 1000, 2).unwrap(),
-            vec![&mut mint2_account, &mut account2_account],
-        )
-        .unwrap();
-
-        // set owner for non-mint-able token
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                set_owner(&program_id, &mint2_key, &owner2_key, &owner_key, &[]).unwrap(),
-                vec![&mut mint_account, &mut owner2_account, &mut owner_account],
-            )
-        );
-    }
-
-    #[test]
-    fn test_mint_to() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account3_key = pubkey_rand();
-        let mut account3_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let mismatch_key = pubkey_rand();
-        let mut mismatch_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let owner2_key = pubkey_rand();
-        let mut owner2_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let mint2_key = pubkey_rand();
-        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let uninitialized_key = pubkey_rand();
-        let mut uninitialized_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account2_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account3_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account3_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create mismatch account
-        do_process_instruction(
-            initialize_account(&program_id, &mismatch_key, &mint2_key, &owner_key).unwrap(),
-            vec![
-                &mut mismatch_account,
-                &mut mint2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // create new mint with owner
-        do_process_instruction(
-            initialize_mint(
-                &program_id,
-                &mint_key,
-                Some(&account_key),
-                Some(&owner_key),
-                1000,
-                2,
-            )
-            .unwrap(),
-            vec![&mut mint_account, &mut account_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // mint to
-        do_process_instruction(
-            mint_to(&program_id, &mint_key, &account2_key, &owner_key, &[], 42).unwrap(),
-            vec![&mut mint_account, &mut account2_account, &mut owner_account],
-        )
-        .unwrap();
-
-        let _: &mut Mint = State::unpack(&mut mint_account.data).unwrap();
-        let dest_account: &mut Account = State::unpack(&mut account2_account.data).unwrap();
-        assert_eq!(dest_account.amount, 42);
-
-        // missing signer
-        let mut instruction =
-            mint_to(&program_id, &mint_key, &account2_key, &owner_key, &[], 42).unwrap();
-        instruction.accounts[2].is_signer = false;
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            do_process_instruction(
-                instruction,
-                vec![&mut mint_account, &mut account2_account, &mut owner_account],
-            )
-        );
-
-        // mismatch account
-        assert_eq!(
-            Err(TokenError::MintMismatch.into()),
-            do_process_instruction(
-                mint_to(&program_id, &mint_key, &mismatch_key, &owner_key, &[], 42).unwrap(),
-                vec![&mut mint_account, &mut mismatch_account, &mut owner_account],
-            )
-        );
-
-        // missing owner
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                mint_to(&program_id, &mint_key, &account2_key, &owner2_key, &[], 42).unwrap(),
-                vec![
-                    &mut mint_account,
-                    &mut account2_account,
-                    &mut owner2_account,
-                ],
-            )
-        );
-
-        // uninitialized destination account
-        assert_eq!(
-            Err(TokenError::UninitializedState.into()),
-            do_process_instruction(
-                mint_to(
-                    &program_id,
-                    &mint_key,
-                    &uninitialized_key,
-                    &owner_key,
-                    &[],
-                    42
-                )
-                .unwrap(),
-                vec![
-                    &mut mint_account,
-                    &mut uninitialized_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-    }
-
-    #[test]
-    fn test_burn() {
-        let program_id = pubkey_rand();
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account3_key = pubkey_rand();
-        let mut account3_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let delegate_key = pubkey_rand();
-        let mut delegate_account = SolanaAccount::default();
-        let mismatch_key = pubkey_rand();
-        let mut mismatch_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let owner2_key = pubkey_rand();
-        let mut owner2_account = SolanaAccount::default();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let mint2_key = pubkey_rand();
-        let mut mint2_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-
-        // create account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account2_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account2_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create another account
-        do_process_instruction(
-            initialize_account(&program_id, &account3_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account3_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // create mismatch account
-        do_process_instruction(
-            initialize_account(&program_id, &mismatch_key, &mint2_key, &owner_key).unwrap(),
-            vec![
-                &mut mismatch_account,
-                &mut mint2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // create new mint
-        do_process_instruction(
-            initialize_mint(&program_id, &mint_key, Some(&account_key), None, 1000, 2).unwrap(),
-            vec![&mut mint_account, &mut account_account],
-        )
-        .unwrap();
-
-        // missing signer
-        let mut instruction = burn(&program_id, &account_key, &delegate_key, &[], 42).unwrap();
-        instruction.accounts[1].is_signer = false;
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                instruction,
-                vec![&mut account_account, &mut delegate_account],
-            )
-        );
-
-        // missing owner
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                burn(&program_id, &account_key, &owner2_key, &[], 42).unwrap(),
-                vec![&mut account_account, &mut owner2_account],
-            )
-        );
-
-        // burn
-        do_process_instruction(
-            burn(&program_id, &account_key, &owner_key, &[], 42).unwrap(),
-            vec![&mut account_account, &mut owner_account],
-        )
-        .unwrap();
-
-        let _: &mut Mint = State::unpack(&mut mint_account.data).unwrap();
-        let account: &mut Account = State::unpack(&mut account_account.data).unwrap();
-        assert_eq!(account.amount, 1000 - 42);
-
-        // insufficient funds
-        assert_eq!(
-            Err(TokenError::InsufficientFunds.into()),
-            do_process_instruction(
-                burn(&program_id, &account_key, &owner_key, &[], 100_000_000).unwrap(),
-                vec![&mut account_account, &mut owner_account],
-            )
-        );
-
-        // approve delegate
-        do_process_instruction(
-            approve(
-                &program_id,
-                &account_key,
-                &delegate_key,
-                &owner_key,
-                &[],
-                84,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut delegate_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        // not a delegate of source account
-        assert_eq!(
-            Err(TokenError::InsufficientFunds.into()),
-            do_process_instruction(
-                burn(&program_id, &account_key, &owner_key, &[], 100_000_000).unwrap(),
-                vec![&mut account_account, &mut owner_account],
-            )
-        );
-
-        // burn via delegate
-        do_process_instruction(
-            burn(&program_id, &account_key, &delegate_key, &[], 84).unwrap(),
-            vec![&mut account_account, &mut delegate_account],
-        )
-        .unwrap();
-
-        // match
-        let _: &mut Mint = State::unpack(&mut mint_account.data).unwrap();
-        let account: &mut Account = State::unpack(&mut account_account.data).unwrap();
-        assert_eq!(account.amount, 1000 - 42 - 84);
-
-        // insufficient funds approved via delegate
-        assert_eq!(
-            Err(TokenError::OwnerMismatch.into()),
-            do_process_instruction(
-                burn(&program_id, &account_key, &delegate_key, &[], 100).unwrap(),
-                vec![&mut account_account, &mut delegate_account],
-            )
-        );
-    }
-
-    #[test]
-    fn test_multisig() {
-        let program_id = pubkey_rand();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let account_key = pubkey_rand();
-        let mut account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(0, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let multisig_key = pubkey_rand();
-        let mut multisig_account = SolanaAccount::new(0, size_of::<Multisig>(), &program_id);
-        let multisig_delegate_key = pubkey_rand();
-        let mut multisig_delegate_account =
-            SolanaAccount::new(0, size_of::<Multisig>(), &program_id);
-        let signer_keys = vec![pubkey_rand(); MAX_SIGNERS];
-        let signer_key_refs: Vec<&Pubkey> = signer_keys.iter().map(|key| key).collect();
-        let mut signer_accounts = vec![SolanaAccount::new(0, 0, &program_id); MAX_SIGNERS];
-
-        // single signer
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            initialize_multisig(&program_id, &multisig_key, &[&signer_keys[0]], 1).unwrap(),
-            vec![
-                &mut multisig_account,
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // multiple signer
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            initialize_multisig(
-                &program_id,
-                &multisig_delegate_key,
-                &signer_key_refs,
-                MAX_SIGNERS as u8,
-            )
-            .unwrap(),
-            vec![
-                &mut multisig_delegate_account,
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // create account with multisig owner
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &multisig_key).unwrap(),
-            vec![&mut account, &mut mint_account, &mut multisig_account],
-        )
-        .unwrap();
-
-        // create another account with multisig owner
-        do_process_instruction(
-            initialize_account(
-                &program_id,
-                &account2_key,
-                &mint_key,
-                &multisig_delegate_key,
-            )
-            .unwrap(),
-            vec![
-                &mut account2_account,
-                &mut mint_account,
-                &mut multisig_account,
-            ],
-        )
-        .unwrap();
-
-        // create new m int with multisig owner
-        do_process_instruction(
-            initialize_mint(
-                &program_id,
-                &mint_key,
-                Some(&account_key),
-                Some(&multisig_key),
-                1000,
-                2,
-            )
-            .unwrap(),
-            vec![&mut mint_account, &mut account, &mut multisig_account],
-        )
-        .unwrap();
-
-        // approve
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            approve(
-                &program_id,
-                &account_key,
-                &multisig_delegate_key,
-                &multisig_key,
-                &[&signer_keys[0]],
-                100,
-            )
-            .unwrap(),
-            vec![
-                &mut account,
-                &mut multisig_delegate_account,
-                &mut multisig_account,
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // transfer
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account_key,
-                &account2_key,
-                &multisig_key,
-                &[&signer_keys[0]],
-                42,
-            )
-            .unwrap(),
-            vec![
-                &mut account,
-                &mut account2_account,
-                &mut multisig_account,
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // transfer via delegate
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account_key,
-                &account2_key,
-                &multisig_delegate_key,
-                &signer_key_refs,
-                42,
-            )
-            .unwrap(),
-            vec![
-                &mut account,
-                &mut account2_account,
-                &mut multisig_delegate_account,
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // mint to
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            mint_to(
-                &program_id,
-                &mint_key,
-                &account2_key,
-                &multisig_key,
-                &[&signer_keys[0]],
-                42,
-            )
-            .unwrap(),
-            vec![
-                &mut mint_account,
-                &mut account2_account,
-                &mut multisig_account,
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // burn
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            burn(
-                &program_id,
-                &account_key,
-                &multisig_key,
-                &[&signer_keys[0]],
-                42,
-            )
-            .unwrap(),
-            vec![
-                &mut account,
-                &mut multisig_account,
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // burn via delegate
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            burn(
-                &program_id,
-                &account_key,
-                &multisig_delegate_key,
-                &signer_key_refs,
-                42,
-            )
-            .unwrap(),
-            vec![
-                &mut account,
-                &mut multisig_delegate_account,
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // do SetOwner on mint
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            set_owner(
-                &program_id,
-                &mint_key,
-                &owner_key,
-                &multisig_key,
-                &[&signer_keys[0]],
-            )
-            .unwrap(),
-            vec![
-                &mut mint_account,
-                &mut owner_account,
-                &mut multisig_account,
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-
-        // do SetOwner on account
-        let account_info_iter = &mut signer_accounts.iter_mut();
-        do_process_instruction(
-            set_owner(
-                &program_id,
-                &account_key,
-                &owner_key,
-                &multisig_key,
-                &[&signer_keys[0]],
-            )
-            .unwrap(),
-            vec![
-                &mut account,
-                &mut owner_account,
-                &mut multisig_account,
-                &mut account_info_iter.next().unwrap(),
-            ],
-        )
-        .unwrap();
-    }
-
-    #[test]
-    fn test_validate_owner() {
-        let program_id = pubkey_rand();
-        let owner_key = pubkey_rand();
-        let mut signer_keys = [Pubkey::default(); MAX_SIGNERS];
-        for signer_key in signer_keys.iter_mut().take(MAX_SIGNERS) {
-            *signer_key = pubkey_rand();
-        }
-        let mut signer_lamports = 0;
-        let mut signer_data = vec![];
-        let mut signers = vec![
-            AccountInfo::new(
-                &owner_key,
-                true,
-                false,
-                &mut signer_lamports,
-                &mut signer_data,
-                &program_id,
-                false,
-                Epoch::default(),
-            );
-            MAX_SIGNERS + 1
-        ];
-        for (signer, key) in signers.iter_mut().zip(&signer_keys) {
-            signer.key = key;
-        }
-        let mut lamports = 0;
-        let mut data = vec![0; size_of::<Multisig>()];
-        let mut multisig: &mut Multisig = State::unpack_unchecked(&mut data).unwrap();
-        multisig.m = MAX_SIGNERS as u8;
-        multisig.n = MAX_SIGNERS as u8;
-        multisig.signers = signer_keys;
-        multisig.is_initialized = true;
-        let owner_account_info = AccountInfo::new(
-            &owner_key,
-            false,
-            false,
-            &mut lamports,
-            &mut data,
-            &program_id,
-            false,
-            Epoch::default(),
-        );
-
-        // full 11 of 11
-        State::validate_owner(&program_id, &owner_key, &owner_account_info, &signers).unwrap();
-
-        // 1 of 11
-        {
-            let mut data_ref_mut = owner_account_info.data.borrow_mut();
-            let mut multisig: &mut Multisig = State::unpack(&mut data_ref_mut).unwrap();
-            multisig.m = 1;
-        }
-        State::validate_owner(&program_id, &owner_key, &owner_account_info, &signers).unwrap();
-
-        // 2:1
-        {
-            let mut data_ref_mut = owner_account_info.data.borrow_mut();
-            let mut multisig: &mut Multisig = State::unpack(&mut data_ref_mut).unwrap();
-            multisig.m = 2;
-            multisig.n = 1;
-        }
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            State::validate_owner(&program_id, &owner_key, &owner_account_info, &signers)
-        );
-
-        // 0:11
-        {
-            let mut data_ref_mut = owner_account_info.data.borrow_mut();
-            let mut multisig: &mut Multisig = State::unpack(&mut data_ref_mut).unwrap();
-            multisig.m = 0;
-            multisig.n = 11;
-        }
-        State::validate_owner(&program_id, &owner_key, &owner_account_info, &signers).unwrap();
-
-        // 2:11 but 0 provided
-        {
-            let mut data_ref_mut = owner_account_info.data.borrow_mut();
-            let mut multisig: &mut Multisig = State::unpack(&mut data_ref_mut).unwrap();
-            multisig.m = 2;
-            multisig.n = 11;
-        }
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            State::validate_owner(&program_id, &owner_key, &owner_account_info, &[])
-        );
-        // 2:11 but 1 provided
-        {
-            let mut data_ref_mut = owner_account_info.data.borrow_mut();
-            let mut multisig: &mut Multisig = State::unpack(&mut data_ref_mut).unwrap();
-            multisig.m = 2;
-            multisig.n = 11;
-        }
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            State::validate_owner(&program_id, &owner_key, &owner_account_info, &signers[0..1])
-        );
-
-        // 2:11, 2 from middle provided
-        {
-            let mut data_ref_mut = owner_account_info.data.borrow_mut();
-            let mut multisig: &mut Multisig = State::unpack(&mut data_ref_mut).unwrap();
-            multisig.m = 2;
-            multisig.n = 11;
-        }
-        State::validate_owner(&program_id, &owner_key, &owner_account_info, &signers[5..7])
-            .unwrap();
-
-        // 11:11, one is not a signer
-        {
-            let mut data_ref_mut = owner_account_info.data.borrow_mut();
-            let mut multisig: &mut Multisig = State::unpack(&mut data_ref_mut).unwrap();
-            multisig.m = 2;
-            multisig.n = 11;
-        }
-        signers[5].is_signer = false;
-        assert_eq!(
-            Err(ProgramError::MissingRequiredSignature),
-            State::validate_owner(&program_id, &owner_key, &owner_account_info, &signers)
-        );
-        signers[5].is_signer = true;
-    }
-
-    #[test]
-    fn test_close_account() {
-        let program_id = pubkey_rand();
-        let mint_key = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(42, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(2, size_of::<Account>(), &program_id);
-        let account3_key = pubkey_rand();
-        let mut account3_account = SolanaAccount::new(2, size_of::<Account>(), &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-        let owner2_key = pubkey_rand();
-        let mut owner2_account = SolanaAccount::default();
-
-        // uninitialized
-        assert_eq!(
-            Err(TokenError::UninitializedState.into()),
-            do_process_instruction(
-                close_account(&program_id, &account_key, &account3_key, &owner2_key, &[]).unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut account3_account,
-                    &mut owner2_account,
-                ],
-            )
-        );
-
-        // initialize non-native account
-        do_process_instruction(
-            initialize_account(&program_id, &account_key, &mint_key, &owner_key).unwrap(),
-            vec![&mut account_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-
-        // initialize native account
-        do_process_instruction(
-            initialize_account(
-                &program_id,
-                &account2_key,
-                &crate::native_mint::id(),
-                &owner_key,
-            )
-            .unwrap(),
-            vec![&mut account2_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-        let account: &mut Account = State::unpack(&mut account2_account.data).unwrap();
-        assert!(account.is_native);
-        assert_eq!(account.amount, 2);
-
-        // close non-native account
-        assert_eq!(
-            Err(TokenError::NonNativeNotSupported.into()),
-            do_process_instruction(
-                close_account(&program_id, &account_key, &account3_key, &owner_key, &[]).unwrap(),
-                vec![
-                    &mut account_account,
-                    &mut account3_account,
-                    &mut owner_account,
-                ],
-            )
-        );
-        assert_eq!(account_account.lamports, 42);
-
-        // close native account
-        do_process_instruction(
-            close_account(&program_id, &account2_key, &account3_key, &owner_key, &[]).unwrap(),
-            vec![
-                &mut account2_account,
-                &mut account3_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-        let account: &mut Account = State::unpack_unchecked(&mut account2_account.data).unwrap();
-        assert!(account.is_native);
-        assert_eq!(account.amount, 0);
-        assert_eq!(account3_account.lamports, 4);
-    }
-
-    #[test]
-    fn test_native_token() {
-        let program_id = pubkey_rand();
-        let mut mint_account = SolanaAccount::new(0, size_of::<Mint>(), &program_id);
-        let account_key = pubkey_rand();
-        let mut account_account = SolanaAccount::new(42, size_of::<Account>(), &program_id);
-        let account2_key = pubkey_rand();
-        let mut account2_account = SolanaAccount::new(2, size_of::<Account>(), &program_id);
-        let account3_key = pubkey_rand();
-        let mut account3_account = SolanaAccount::new(2, 0, &program_id);
-        let owner_key = pubkey_rand();
-        let mut owner_account = SolanaAccount::default();
-
-        // initialize native account
-        do_process_instruction(
-            initialize_account(
-                &program_id,
-                &account_key,
-                &crate::native_mint::id(),
-                &owner_key,
-            )
-            .unwrap(),
-            vec![&mut account_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-        let account: &mut Account = State::unpack(&mut account_account.data).unwrap();
-        assert!(account.is_native);
-        assert_eq!(account.amount, 42);
-
-        // initialize native account
-        do_process_instruction(
-            initialize_account(
-                &program_id,
-                &account2_key,
-                &crate::native_mint::id(),
-                &owner_key,
-            )
-            .unwrap(),
-            vec![&mut account2_account, &mut mint_account, &mut owner_account],
-        )
-        .unwrap();
-        let account: &mut Account = State::unpack(&mut account2_account.data).unwrap();
-        assert!(account.is_native);
-        assert_eq!(account.amount, 2);
-
-        // mint_to unsupported
-        assert_eq!(
-            Err(TokenError::NativeNotSupported.into()),
-            do_process_instruction(
-                mint_to(
-                    &program_id,
-                    &crate::native_mint::id(),
-                    &account_key,
-                    &owner_key,
-                    &[],
-                    42
-                )
-                .unwrap(),
-                vec![&mut mint_account, &mut account_account, &mut owner_account],
-            )
-        );
-
-        // burn unsupported
-        assert_eq!(
-            Err(TokenError::NativeNotSupported.into()),
-            do_process_instruction(
-                burn(&program_id, &account_key, &owner_key, &[], 42).unwrap(),
-                vec![&mut account_account, &mut owner_account],
-            )
-        );
-
-        // initialize native account
-        do_process_instruction(
-            transfer(
-                &program_id,
-                &account_key,
-                &account2_key,
-                &owner_key,
-                &[],
-                40,
-            )
-            .unwrap(),
-            vec![
-                &mut account_account,
-                &mut account2_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-
-        let account: &mut Account = State::unpack(&mut account_account.data).unwrap();
-        assert!(account.is_native);
-        assert_eq!(account_account.lamports, 2);
-        assert_eq!(account.amount, 2);
-        let account: &mut Account = State::unpack(&mut account2_account.data).unwrap();
-        assert!(account.is_native);
-        assert_eq!(account2_account.lamports, 42);
-        assert_eq!(account.amount, 42);
-
-        // close native account
-        do_process_instruction(
-            close_account(&program_id, &account_key, &account3_key, &owner_key, &[]).unwrap(),
-            vec![
-                &mut account_account,
-                &mut account3_account,
-                &mut owner_account,
-            ],
-        )
-        .unwrap();
-        let account: &mut Account = State::unpack_unchecked(&mut account_account.data).unwrap();
-        assert!(account.is_native);
-        assert_eq!(account_account.lamports, 0);
-        assert_eq!(account.amount, 0);
-        assert_eq!(account3_account.lamports, 4);
+    Ok(mut_ref)
+}
+/// Unpacks a token state from a bytes buffer without checking that the state is initialized.
+pub fn unpack_unchecked<T: IsInitialized>(input: &mut [u8]) -> Result<&mut T, ProgramError> {
+    if input.len() != size_of::<T>() {
+        return Err(ProgramError::InvalidAccountData);
     }
+    #[allow(clippy::cast_ptr_alignment)]
+    Ok(unsafe { &mut *(&mut input[0] as *mut u8 as *mut T) })
 }