Function create_block

test/functional/test_framework/blocktools.py:98–119

Create a block (with regtest difficulty).

(hashprev=None, coinbase=None, *, ntime=None, height=None, version=None, tmpl=None, txlist=None)

    return f"{target:064x}"

def create_block(hashprev=None, coinbase=None, *, ntime=None, height=None, version=None, tmpl=None, txlist=None):
    """Create a block (with regtest difficulty)."""
    block = CBlock()
    if tmpl is None:
        tmpl = {}
    block.nVersion = version or tmpl.get('version') or VERSIONBITS_LAST_OLD_BLOCK_VERSION
    block.nTime = ntime or tmpl.get('curtime') or int(time.time() + 600)
    block.hashPrevBlock = hashprev or int(tmpl['previousblockhash'], 0x10)
    if tmpl and tmpl.get('bits') is not None:
        block.nBits = struct.unpack('>I', bytes.fromhex(tmpl['bits']))[0]
    else:
        block.nBits = REGTEST_N_BITS
    if coinbase is None:
        coinbase = create_coinbase(height=height or tmpl["height"])
    block.vtx.append(coinbase)
    if txlist:
        for tx in txlist:
            if type(tx) is str:
                tx = tx_from_hex(tx)
            block.vtx.append(tx)
    block.hashMerkleRoot = block.calc_merkle_root()
    return block

def create_empty_fork(node, fork_length=FORK_LENGTH):
    '''