def mine(cls,
block: Block,
mine_interrupt: threading.Event = None) -> Union[Block, None]:
start = time.time()
nonce = 0
target = (1 << (256 - block.bits))
mine_interrupt.clear()
logger.info(f'[consensus] mining after block {block.prev_block_hash}')
while int(Utils.sha256d(block.header(nonce)), 16) >= target:
nonce += 1
if mine_interrupt.is_set():
logger.info(f'[consensus] mining interrupted +++ {nonce}')
mine_interrupt.clear()
return None
block = block._replace(nonce=nonce)
duration = max(time.time() - start, 0.0001)
khs = (block.nonce // duration) // 1000
logger.info(
f'[consensus] mining block found at nonce={nonce} using {round(duration, 4)} s at rate {khs} KH/s: {block.id}'
)
return block
def mine(block: Block) -> Block:
"""
A minimal function for calculating genisis_block nonce.
"""
start = time.time()
nonce = 0
target = 1 << (256 - block.bits)
while int(Utils.sha256d(block.header(nonce)), 16) >= target:
nonce += 1
block = block._replace(nonce=nonce)
duration = max(time.time() - start, 0.0001)
khs = (block.nonce // duration) // 1_000
print(
f"genesis_block found at nonce={nonce} using {round(duration, 4)}s at rate {khs}KH/s"
)
print(f"blockid={block.id}")
return block