feat(logic): simplify wasm custom query integration

x/logic/wasm/query.go

@@ -0,0 +1,42 @@
+package wasm
+
+import (
+	"encoding/json"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/okp4/okp4d/x/logic/keeper"
+	"github.com/okp4/okp4d/x/logic/types"
+)
+
+// AskQuery contains parameters to the Ask gRPC logic query, it is redefined to prevent eventual breaking change in the
+// logic module definitions with wasm usages.
+type AskQuery struct {
+	Program string `json:"program"`
+	Query   string `json:"query"`
+}
+
+// LogicQuerier ease the bridge between the logic module with the wasm CustomQuerier to allow wasm contracts to query
+// the logic module.
+type LogicQuerier struct {
+	k keeper.Keeper
+}
+
+// MakeLogicQuerier creates a new LogicQuerier based on the logic keeper.
+func MakeLogicQuerier(keeper keeper.Keeper) LogicQuerier {
+	return LogicQuerier{
+		k: keeper,
+	}
+}
+
+// Ask is a proxy method with the gRPC one, returning the result in the json format.
+func (querier LogicQuerier) Ask(ctx sdk.Context, query *AskQuery) ([]byte, error) {
+	resp, err := querier.k.Ask(ctx, &types.QueryServiceAskRequest{
+		Program: query.Program,
+		Query:   query.Query,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return json.Marshal(resp)
+}