def genesis() -> Block:
args = (0, "0", int(time.time()), "Genesis Block")
nonce = 0
# suppose this target's difficulty = 1
target = "00000ffff0000000000000000000000000000000000000000000000000000000"
while True:
hash = Block.calculate_hash(*args, nonce=nonce, target=target)
if Block.validate_difficulty(hash, target):
break
else:
nonce += 1
return Block(*args, nonce=nonce, target=target, hash=hash)
def generate_next(self, data: str) -> Block:
lb = self.latest_block
args = (lb.index + 1, lb.hash, int(time.time()), data)
nonce = 0
target = self.retarget()
while True:
hash = Block.calculate_hash(*args, nonce=nonce, target=target)
if Block.validate_difficulty(hash, target):
break
else:
nonce += 1
return Block(*args, nonce=nonce, target=target, hash=hash)