Method Check

lib/block.go:18–97

* This file contains the default implementation of a 'Block' which is used as 'block bytes' in a quorum certificate */ BLOCK HEADER CODE BELOW Check() 'sanity checks' the block header

(networkID, chainId uint64)

// Check() 'sanity checks' the block header
func (x *BlockHeader) Check(networkID, chainId uint64) ErrorI {
	// rejects empty block header
	if x == nil {
		return ErrNilBlockHeader()
	}
	// check proposer address size
	if len(x.ProposerAddress) != crypto.AddressSize {
		return ErrInvalidBlockProposerAddress()
	}
	// check BlockHash size
	if len(x.Hash) != crypto.HashSize {
		return ErrWrongLengthBlockHash()
	}
	// check StateRoot hash size
	if len(x.StateRoot) != crypto.HashSize {
		return ErrWrongLengthStateRoot()
	}
	// check TransactionRoot hash size
	if len(x.TransactionRoot) != crypto.HashSize {
		return ErrWrongLengthTransactionRoot()
	}
	// check ValidatorRoot hash size
	if len(x.ValidatorRoot) != crypto.HashSize {
		return ErrWrongLengthValidatorRoot()
	}
	// check NextValidatorRoot hash size
	if len(x.NextValidatorRoot) != crypto.HashSize {
		return ErrWrongLengthNextValidatorRoot()
	}
	// check LastBlockHash hash size
	if len(x.LastBlockHash) != crypto.HashSize {
		return ErrWrongLengthLastBlockHash()
	}
	// if after the first block
	if x.Height > 1 {
		// check the LastQuorumCertificate
		if err := x.LastQuorumCertificate.CheckBasic(); err != nil {
			return err
		}
		// ensure the last quorum certificate has the proper network id
		if x.LastQuorumCertificate.Header.NetworkId != networkID {
			return ErrWrongNetworkID()
		}
		// check the last quorum certificate has the proper chain id
		if x.LastQuorumCertificate.Header.ChainId != chainId {
			return ErrWrongChainId()
		}
	}
	// check network id
	if uint64(x.NetworkId) != networkID {
		return ErrWrongNetworkID()
	}
	// check for non-zero BlockTime
	if x.Time == 0 {
		return ErrNilBlockTime()
	}
	// check for non-zero NetworkID
	if x.NetworkId == 0 {