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get_storage.go
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get_storage.go
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// Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
//
// Copyright 2019 Centrifuge GmbH
//
// 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 (
"errors"
"fmt"
"github.com/Platdot-Network/go-substrate-rpc-client/v3/client"
"github.com/Platdot-Network/go-substrate-rpc-client/v3/types"
)
// GetStorage retreives the stored data and decodes them into the provided interface. Ok is true if the value is not
// empty.
func (s *State) GetStorage(key types.StorageKey, target interface{}, blockHash types.Hash) (ok bool, err error) {
raw, err := s.getStorageRaw(key, &blockHash)
if err != nil {
return false, err
}
if len(*raw) == 0 {
return false, nil
}
return true, types.DecodeFromBytes(*raw, target)
}
// GetStorageLatest retreives the stored data for the latest block height and decodes them into the provided interface.
// Ok is true if the value is not empty.
func (s *State) GetStorageLatest(key types.StorageKey, target interface{}) (ok bool, err error) {
raw, err := s.getStorageRaw(key, nil)
if err != nil {
return false, err
}
if len(*raw) == 0 {
return false, nil
}
return true, types.DecodeFromBytes(*raw, target)
}
// GetStorageRaw retreives the stored data as raw bytes, without decoding them
func (s *State) GetStorageRaw(key types.StorageKey, blockHash types.Hash) (*types.StorageDataRaw, error) {
return s.getStorageRaw(key, &blockHash)
}
// GetStorageRawLatest retreives the stored data for the latest block height as raw bytes, without decoding them
func (s *State) GetStorageRawLatest(key types.StorageKey) (*types.StorageDataRaw, error) {
return s.getStorageRaw(key, nil)
}
func (s *State) getStorageRaw(key types.StorageKey, blockHash *types.Hash) (*types.StorageDataRaw, error) {
var res string
err := client.CallWithBlockHash(s.client, &res, "state_getStorage", blockHash, key.Hex())
if err != nil {
return nil, err
}
bz, err := types.HexDecodeString(res)
if err != nil {
return nil, err
}
data := types.NewStorageDataRaw(bz)
return &data, nil
}
/*
func: 因为AccountInfo这个结构老是变,所以我在解析这个结构的时候,在这里处理
author: flynn
date: 2021-06-07
*/
func (s *State) GetStorageAccountInfo(key types.StorageKey, blockHash types.Hash) (*types.AccountInfo, error) {
raw, err := s.getStorageRaw(key, &blockHash)
if err != nil {
return nil, err
}
if len(*raw) == 0 {
return nil, errors.New("get storage account info data raw error: raw len is 0")
}
var accountInfo types.AccountInfo
switch len(*raw) {
case 80:
var aiwtr types.AccountInfoWithTripleRefCount
err = types.DecodeFromBytes(*raw, &aiwtr)
if err != nil {
return nil, err
}
accountInfo.Nonce = aiwtr.Nonce
accountInfo.Consumers = aiwtr.Consumers
accountInfo.Providers = aiwtr.Providers
accountInfo.Data.Free = aiwtr.Data.Free
accountInfo.Data.FreeFrozen = aiwtr.Data.FreeFrozen
accountInfo.Data.MiscFrozen = aiwtr.Data.MiscFrozen
accountInfo.Data.Reserved = aiwtr.Data.Reserved
case 76:
var aiwpr types.AccountInfoWithProviders
err = types.DecodeFromBytes(*raw, &aiwpr)
if err != nil {
return nil, err
}
accountInfo.Nonce = aiwpr.Nonce
accountInfo.Consumers = aiwpr.Consumers
accountInfo.Providers = aiwpr.Providers
accountInfo.Data.Free = aiwpr.Data.Free
accountInfo.Data.FreeFrozen = aiwpr.Data.FreeFrozen
accountInfo.Data.MiscFrozen = aiwpr.Data.MiscFrozen
accountInfo.Data.Reserved = aiwpr.Data.Reserved
case 72:
var aio types.AccountInfoOld
err = types.DecodeFromBytes(*raw, &aio)
if err != nil {
return nil, err
}
accountInfo.Nonce = aio.Nonce
accountInfo.Consumers = aio.Refcount
accountInfo.Providers = 0
accountInfo.Data.Free = aio.Data.Free
accountInfo.Data.FreeFrozen = aio.Data.FreeFrozen
accountInfo.Data.MiscFrozen = aio.Data.MiscFrozen
accountInfo.Data.Reserved = aio.Data.Reserved
default:
return nil, fmt.Errorf("can not parse account info ,raw length is not standard len(80,76,72),len=%d", len(*raw))
}
return &accountInfo, err
}