def main():
# Creating Clients
Dinesh = client.Client()
yash = client.Client()
John = client.Client()
Dexter = client.Client()
# Creating Transactions (Senders , reciver , Amount/Value)
t0 = Transaction("Genesis", Dinesh.identity, 10)
t1 = Transaction(Dinesh, yash.identity, 100)
t2 = Transaction(yash, John.identity, 1000)
t3 = Transaction(yash, Dexter.identity, 1000)
t4 = Transaction(John, Dexter.identity, 223)
t5 = Transaction(John, Dexter.identity, 102)
t6 = Transaction(yash, Dexter.identity, 100)
t7 = Transaction(Dinesh, yash.identity, 10000)
t8 = Transaction(yash, John.identity, 100)
t9 = Transaction(yash, John.identity, 500)
# Signing_transactions
t1.sign_transaction()
t2.sign_transaction()
t3.sign_transaction()
t4.sign_transaction()
t5.sign_transaction()
t6.sign_transaction()
t7.sign_transaction()
t8.sign_transaction()
t9.sign_transaction()
# appending to global transaction list
client.transactions.append(t0)
client.transactions.append(t1)
client.transactions.append(t2)
client.transactions.append(t3)
client.transactions.append(t4)
client.transactions.append(t5)
client.transactions.append(t6)
client.transactions.append(t7)
client.transactions.append(t8)
client.transactions.append(t9)
# Miner adds a block ( every block has three trasaction details)
for i in range(0, 3):
block = Block()
for i in range(3):
temp_transaction = client.transactions[
client.last_transaction_index]
# validate transaction (remaining)
# if valid (remaining)
block.verified_transactions.append(temp_transaction)
client.last_transaction_index += 1
# updating pervious hash
block.previous_block_hash = client.last_block_hash
# calling miner
block.Nonce = hashes.mine(block, 10)
digest = hash(block)
# adding block to the blockchain
client.TPCoins.append(block)
client.last_block_hash = digest
# dumping blockChain
displaying_methods.dump_blockchain(client.TPCoins)
# Mining
def mine(message, difficulty=1):
assert difficulty >= 1
prefix = '1' * difficulty
digest = None
for i in range(10_000):
digest = sha256(str(message) + str(i))
if digest.startswith(prefix):
print('After', i, 'iteration, NONCE FOUND with', digest)
break
return digest
def sha256(message):
return hashlib.sha256(message.encode('ascii')).hexdigest()
# Miner 1
block = Block()
for tx in transactions:
block.verified_transactions.append(tx)
block.previous_block_hash = last_block_hash
block.Nonce = mine(block, 2)
digest = hash(block)
ANUBIS.append(block)
display_blockchain(ANUBIS)
