Feature-gate grpc query

Author: chipshort

docs/CAPABILITIES-BUILT-IN.md

@@ -23,5 +23,5 @@ might define others.
   `DistributionQuery::DelegationTotalRewards` and
   `DistributionQuery::DelegatorValidators` queries. Only chains running CosmWasm
   `1.4.0` or higher support this.
-- `cosmwasm_2_0` enables `CosmosMsg::Any`. Only chains running CosmWasm `2.0.0`
-  or higher support this.
+- `cosmwasm_2_0` enables `CosmosMsg::Any` and `QueryRequest::Grpc`. Only chains
+  running CosmWasm `2.0.0` or higher support this.

packages/std/Cargo.toml

@@ -47,7 +47,7 @@ cosmwasm_1_3 = ["cosmwasm_1_2"]
 # It requires the host blockchain to run CosmWasm `1.4.0` or higher.
 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 adds `CosmosMsg::Any`, replacing `CosmosMsg::Stargate`. It also adds `QueryRequest::Grpc`.
 cosmwasm_2_0 = ["cosmwasm_1_4"]
 
 [dependencies]

packages/std/src/query/mod.rs

@@ -66,6 +66,7 @@ pub enum QueryRequest<C> {
     #[cfg(feature = "stargate")]
     Ibc(IbcQuery),
     Wasm(WasmQuery),
+    #[cfg(feature = "cosmwasm_2_0")]
     Grpc(GrpcQuery),
 }
 
@@ -139,6 +140,7 @@ impl<C: CustomQuery> From<WasmQuery> for QueryRequest<C> {
     }
 }
 
+#[cfg(feature = "cosmwasm_2_0")]
 impl<C: CustomQuery> From<GrpcQuery> for QueryRequest<C> {
     fn from(msg: GrpcQuery) -> Self {
         QueryRequest::Grpc(msg)

packages/std/src/testing/mock.rs

@@ -606,6 +606,7 @@ impl<C: CustomQuery + DeserializeOwned> MockQuerier<C> {
             QueryRequest::Stargate { .. } => SystemResult::Err(SystemError::UnsupportedRequest {
                 kind: "Stargate".to_string(),
             }),
+            #[cfg(feature = "cosmwasm_2_0")]
             QueryRequest::Grpc(_) => SystemResult::Err(SystemError::UnsupportedRequest {
                 kind: "GRPC".to_string(),
             }),