add melo-erasure-coding

Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "node",
     "primitives",
+    "crates/*",
     "pallets/template",
     "runtime",
 ]

crates/melo-erasure-coding/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "melo-erasure-coding"
+description = "Polynomial erasure coding implementation used in Melodot"
+license = "Apache-2.0"
+version = "0.1.0"
+authors = ["DKLee <[email protected]>"]
+edition = "2021"
+
+[lib]
+# Necessary for CLI options to work on benches
+bench = false
+
+[dependencies]
+melo-primitives-crypto = { version = "0.1.0", path = "../../primitives", default-features = false }
+rust-kzg-blst = { git = "https://github.com/sifraitech/rust-kzg", rev = "b416f2b", default-features = false }
+kzg = { git = "https://github.com/sifraitech/rust-kzg", rev = "b416f2b", default-features = false }
+
+[dev-dependencies]
+rust-kzg-blst = { git = "https://github.com/sifraitech/rust-kzg", rev = "b416f2b"}
+criterion = "0.4.0"
+rand = "0.8.5"
+
+[features]
+default = ["std", "parallel"]
+std = [
+    "rust-kzg-blst/std",
+    "kzg/std",
+    "melo-primitives-crypto/std",
+]
+parallel = ["rust-kzg-blst/parallel"]

crates/melo-erasure-coding/src/lib.rs

@@ -0,0 +1,30 @@
+// Copyright 2023 ZeroDAO
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+extern crate alloc;
+
+use alloc::sync::Arc;
+use rust_kzg_blst::types::fft_settings::FsFFTSettings;
+
+#[derive(Debug, Clone)]
+pub struct ErasureCoding {
+    fft_settings: Arc<FsFFTSettings>,
+}
+
+impl ErasureCoding {
+	pub fn new(fft_settings: Arc<FsFFTSettings>) -> Self {
+		Self { fft_settings }
+	}
+
+}

primitives/src/kzg.rs

@@ -25,7 +25,7 @@ use parity_scale_codec::{Decode, Encode, EncodeLike, Input, MaxEncodedLen};
 use rust_kzg_blst::{
 	eip_4844::{
 		compute_blob_kzg_proof_rust, load_trusted_setup_filename_rust,
-		verify_blob_kzg_proof_batch_rust, verify_blob_kzg_proof_rust,
+		verify_blob_kzg_proof_batch_rust, verify_blob_kzg_proof_rust, blob_to_kzg_commitment_rust
 	},
 	types::{
 		fft_settings::FsFFTSettings, fr::FsFr, g1::FsG1, kzg_settings::FsKZGSettings, poly::FsPoly,
@@ -230,6 +230,11 @@ impl Blob {
 			})
 			.collect()
 	}
+
+	#[inline]
+	pub fn commit(&self, kzg: &KZG) -> KZGCommitment {
+		KZGCommitment(blob_to_kzg_commitment_rust(&self,&kzg.settings))
+	}
 }
 
 const TRUSTED_SETUP_FILENAME: &str = "eth-public-parameters.bin";