BlockHeader constructor
BlockHeader()
Constructs a new block header
version - Block version number
prevHash - sha256 hash of the previous block header
merkleRoot - sha256 hash at the root of the transaction merkle tree
time - the current block timestamp as seconds since the unix epoch
bits - the current difficulty target in compact format
nonce - the nonce field which the miner manipulates repeatedly as they try to find a sha256 hash value that matches the difficulty target
Implementation
BlockHeader(this._version, this._prevHash, this._merkleRoot, this._time, this._bits, this._nonce);