Add cosmwasm_2_1 cargo feature

Author: aumetra

packages/std/Cargo.toml

@@ -49,6 +49,9 @@ cosmwasm_1_4 = ["cosmwasm_1_3"]
 # This enables functionality that is only available on 2.0 chains.
 # It adds `CosmosMsg::Any`, replacing `CosmosMsg::Stargate`. It also adds `QueryRequest::Grpc`.
 cosmwasm_2_0 = ["cosmwasm_1_4"]
+# This enables functionality that is only available on 2.1 chains.
+# It adds verification and key recovery for the secp256r1 elliptic curve.
+cosmwasm_2_1 = ["cosmwasm_2_0"]
 
 [dependencies]
 base64 = "0.21.0"

packages/std/src/imports.rs

@@ -62,8 +62,10 @@ extern "C" {
     /// secp256r1 ECDSA parametrization.
     /// Returns 0 on verification success, 1 on verification failure, and values
     /// greater than 1 in case of error.
+    #[cfg(feature = "cosmwasm_2_1")]
     fn secp256r1_verify(message_hash_ptr: u32, signature_ptr: u32, public_key_ptr: u32) -> u32;
 
+    #[cfg(feature = "cosmwasm_2_1")]
     fn secp256r1_recover_pubkey(
         message_hash_ptr: u32,
         signature_ptr: u32,