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get_header.go
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get_header.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 chain
import (
"github.com/crustio/go-substrate-rpc-client/v4/client"
"github.com/crustio/go-substrate-rpc-client/v4/types"
)
// GetHeader retrieves the header for the specific block
func (c *Chain) GetHeader(blockHash types.Hash) (*types.Header, error) {
return c.getHeader(&blockHash)
}
// GetHeaderLatest retrieves the header of the latest block
func (c *Chain) GetHeaderLatest() (*types.Header, error) {
return c.getHeader(nil)
}
func (c *Chain) getHeader(blockHash *types.Hash) (*types.Header, error) {
var Header types.Header
err := client.CallWithBlockHash(c.client, &Header, "chain_getHeader", blockHash)
if err != nil {
return nil, err
}
return &Header, err
}