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get_metadata.go
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get_metadata.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 (
"github.com/centrifuge/go-substrate-rpc-client/client"
"github.com/centrifuge/go-substrate-rpc-client/types"
)
// GetMetadata returns the metadata at the given block
func (s *State) GetMetadata(blockHash types.Hash) (*types.Metadata, error) {
return s.getMetadata(&blockHash)
}
// GetMetadataLatest returns the latest metadata
func (s *State) GetMetadataLatest() (*types.Metadata, error) {
return s.getMetadata(nil)
}
func (s *State) getMetadata(blockHash *types.Hash) (*types.Metadata, error) {
var res string
err := client.CallWithBlockHash(s.client, &res, "state_getMetadata", blockHash)
if err != nil {
return nil, err
}
var metadata types.Metadata
err = types.DecodeFromHexString(res, &metadata)
return &metadata, err
}