Add db_next_key and db_next_value imports to std

packages/check/src/main.rs

@@ -11,7 +11,7 @@ use cosmwasm_vm::capabilities_from_csv;
 use cosmwasm_vm::internals::{check_wasm, compile, make_compiling_engine};
 
 const DEFAULT_AVAILABLE_CAPABILITIES: &str =
-    "iterator,staking,stargate,cosmwasm_1_1,cosmwasm_1_2,cosmwasm_1_3";
+    "iterator,staking,stargate,cosmwasm_1_1,cosmwasm_1_2,cosmwasm_1_3,cosmwasm_1_4";
 
 pub fn main() {
     let matches = Command::new("Contract checking")

packages/std/Cargo.toml

@@ -42,6 +42,10 @@ cosmwasm_1_2 = ["cosmwasm_1_1"]
 # This feature makes `BankQuery::DenomMetadata` available for the contract to call, but requires
 # the host blockchain to run CosmWasm `1.3.0` or higher.
 cosmwasm_1_3 = ["cosmwasm_1_2"]
+# Together with the `iterator` feature this enables additional imports for more
+# efficient iteration over DB keys or values.
+# It requires the host blockchain to run CosmWasm `1.4.0` or higher.
+cosmwasm_1_4 = ["cosmwasm_1_3"]
 
 [dependencies]
 base64 = "0.21.0"

packages/std/src/imports.rs

@@ -37,6 +37,10 @@ extern "C" {
     fn db_scan(start_ptr: u32, end_ptr: u32, order: i32) -> u32;
     #[cfg(feature = "iterator")]
     fn db_next(iterator_id: u32) -> u32;
+    #[cfg(all(feature = "iterator", feature = "cosmwasm_1_4"))]
+    fn db_next_key(iterator_id: u32) -> u32;
+    #[cfg(all(feature = "iterator", feature = "cosmwasm_1_4"))]
+    fn db_next_value(iterator_id: u32) -> u32;
 
     fn addr_validate(source_ptr: u32) -> u32;
     fn addr_canonicalize(source_ptr: u32, destination_ptr: u32) -> u32;