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query_storage_at.go
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/
query_storage_at.go
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// Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
//
// Copyright 2022 Snowfork
//
// 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.
package state
import (
"github.com/puneetjindal1997/go-substrate-rpc-client/v4/client"
"github.com/puneetjindal1997/go-substrate-rpc-client/v4/types"
)
// QueryStorageAt performs a low-level storage query
func (s *state) QueryStorageAt(keys []types.StorageKey, block types.Hash) ([]types.StorageChangeSet, error) {
return s.queryStorageAt(keys, &block)
}
// QueryStorageAtLatest performs a low-level storage query
func (s *state) QueryStorageAtLatest(keys []types.StorageKey) ([]types.StorageChangeSet, error) {
return s.queryStorageAt(keys, nil)
}
func (s *state) queryStorageAt(keys []types.StorageKey, block *types.Hash) ([]types.StorageChangeSet, error) {
hexKeys := make([]string, len(keys))
for i, key := range keys {
hexKeys[i] = key.Hex()
}
var res []types.StorageChangeSet
err := client.CallWithBlockHash(s.client, &res, "state_queryStorageAt", block, hexKeys)
if err != nil {
return nil, err
}
return res, nil
}