github.com/diadata-org/diadata@v1.4.593/pkg/dia/helpers/substrate-helper/gsrpc/rpc/state/get_child_keys.go (about)

     1  // Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
     2  //
     3  // Copyright 2019 Centrifuge GmbH
     4  //
     5  // Licensed under the Apache License, Version 2.0 (the "License");
     6  // you may not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package state
    18  
    19  import (
    20  	"github.com/diadata-org/diadata/pkg/dia/helpers/substrate-helper/gsrpc/client"
    21  	"github.com/diadata-org/diadata/pkg/dia/helpers/substrate-helper/gsrpc/types"
    22  	"github.com/diadata-org/diadata/pkg/dia/helpers/substrate-helper/gsrpc/types/codec"
    23  )
    24  
    25  // GetChildKeys retreives the keys with the given prefix of a specific child storage
    26  func (s *state) GetChildKeys(childStorageKey, prefix types.StorageKey, blockHash types.Hash) (
    27  	[]types.StorageKey, error) {
    28  	return s.getChildKeys(childStorageKey, prefix, &blockHash)
    29  }
    30  
    31  // GetChildKeysLatest retreives the keys with the given prefix of a specific child storage for the latest block height
    32  func (s *state) GetChildKeysLatest(childStorageKey, prefix types.StorageKey) ([]types.StorageKey, error) {
    33  	return s.getChildKeys(childStorageKey, prefix, nil)
    34  }
    35  
    36  func (s *state) getChildKeys(childStorageKey, prefix types.StorageKey, blockHash *types.Hash) (
    37  	[]types.StorageKey, error) {
    38  	var res []string
    39  	err := client.CallWithBlockHash(s.client, &res, "state_getChildKeys", blockHash, childStorageKey.Hex(), prefix.Hex())
    40  	if err != nil {
    41  		return nil, err
    42  	}
    43  
    44  	keys := make([]types.StorageKey, len(res))
    45  	for i, r := range res {
    46  		err = codec.DecodeFromHex(r, &keys[i])
    47  		if err != nil {
    48  			return nil, err
    49  		}
    50  	}
    51  	return keys, err
    52  }