BlockHeader(@Nullable parentHash: Hash?, ommersHash: Hash!, coinbase: Address!, stateRoot: Hash!, transactionsRoot: Hash!, receiptsRoot: Hash!, logsBloom: Bytes!, difficulty: UInt256!, number: UInt256!, gasLimit: Gas!, gasUsed: Gas!, timestamp: Instant!, extraData: Bytes!, mixHash: Hash!, nonce: UInt64!)
Creates a new block header.
parentHash - Hash?: the parent hash, or null.
ommersHash - Hash!: the ommers hash.
coinbase - Address!: the block's beneficiary address.
stateRoot - Hash!: the hash associated with the state tree.
transactionsRoot - Hash!: the hash associated with the transactions tree.
receiptsRoot - Hash!: the hash associated with the transaction receipts tree.
logsBloom - Bytes!: the bloom filter of the logs of the block.
difficulty - UInt256!: the difficulty of the block.
number - UInt256!: the number of the block.
gasLimit - Gas!: the gas limit of the block.
gasUsed - Gas!: the gas used for the block.
timestamp - Instant!: the timestamp of the block.
extraData - Bytes!: the extra data stored with the block.
mixHash - Hash!: the hash associated with computional work on the block.
nonce - UInt64!: the nonce of the block.