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get_local_storage.go
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get_local_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 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 offchain
import (
"fmt"
"github.com/Cerebellum-Network/go-substrate-rpc-client/v9/types"
"github.com/Cerebellum-Network/go-substrate-rpc-client/v9/types/codec"
)
// StorageKind ...
type StorageKind string
const (
// Persistent storage
Persistent StorageKind = "PERSISTENT"
// Local storage
Local StorageKind = "LOCAL"
)
// LocalStorageGet retrieves the stored data
func (c *offchain) LocalStorageGet(kind StorageKind, key []byte) (*types.StorageDataRaw, error) {
var res string
err := c.client.Call(&res, "offchain_localStorageGet", kind, fmt.Sprintf("%#x", key))
if err != nil {
return nil, err
}
if len(res) == 0 {
return nil, nil
}
b, err := codec.HexDecodeString(res)
if err != nil {
return nil, err
}
data := types.NewStorageDataRaw(b)
return &data, nil
}
// LocalStorageSet saves the data
func (c *offchain) LocalStorageSet(kind StorageKind, key []byte, value []byte) error {
var res string
err := c.client.Call(&res, "offchain_localStorageSet", kind, fmt.Sprintf("%#x", key), fmt.Sprintf("%#x", value))
if err != nil {
return err
}
return nil
}