def run_sample():
"""Testing code.
"""
# Mine a sample block.
b = Block(timestamp=datetime.datetime.now(),
transactions=[],
previous_hash=get_genisis().hash_block())
mine_till_found(b)
}, open("walletA.json", "w"))
json.dump({
"public": wallets[1][1],
"private": wallets[1][0]
}, open("walletB.json", "w"))
print(repr(wallets))
blocksToSubmit = []
#mine initial block
reward = Transaction(id=gen_uuid(),
owner="mined",
receiver=wallets[0][1],
coins=REWARD,
signature="")
lastBlock = construct_and_mine([reward], get_genisis())
blocksToSubmit.append(lastBlock)
balances = (10, 0)
for i in range(ITERS):
weight = randint(10, 20)
txns = [
paySomeone(wallets[0][1], wallets[0][0], wallets[1][1], balances[0])
for _ in range(weight)
]
lastBlock = construct_and_mine(txns, lastBlock)
blocksToSubmit.append(lastBlock)
wallets = (wallets[1], wallets[0])
balances = (balances[1] + weight * balances[0], balances[0] * (1 - weight))
def run_miner():
"""Run the main miner loop.
"""
global blockchain
global public
global private
new_reward = REWARD
while True:
# Load transaction queue and blockchain from server.
new = []
blockchain = Blockchain()
blockchain.add_block(
Block(
timestamp=datetime.datetime.now(),
transactions=[],
previous_hash=get_genisis().hash_block(),
nonce=12834
),
cheat=True
)
server = load_blockchain()
txns = load_transactions()
# Is this _the_ new block?
# or did the server swoop us :(
new_chain = load_blockchain()
num_blocks = 1333 + server.head.height
for i in range (num_blocks):
reward = Transaction(
id = gen_uuid(),
owner = "mined",
receiver = public,
coins = REWARD,
signature = None
)
reward.signature = sign(reward.comp(), private)
txns = [reward]
b = Block(
timestamp = datetime.datetime.now(),
transactions = txns,
previous_hash = blockchain.head.hash_block()
)
blockchain.add_block(b, cheat=True)
# Let's mine this block.
reward = Transaction(
id = gen_uuid(),
owner = "mined",
receiver = public,
coins = REWARD,
signature = None
)
reward.signature = sign(reward.comp(), private)
txns = [reward]
# Construct a new block.
b = Block(
timestamp = datetime.datetime.now(),
transactions = txns,
previous_hash = b.hash_block()
)
print(blockchain.head.height)
mine_till_found(b)
# WE MINED THIS BLOCK YAY.
# AND WE WIN.
resp = get_route('add', data=str(b))
if resp['success']:
print "Block added!"
delete_queue(txns)
else:
print "Couldn't add block:", resp['message']