def __init__(self):
self.chain = []
self.current_transactions = []
self.transaction_index = 0
# トランザクションにコインベースを追加します
self.create_transaction(sender='0', recipient="my_address", amount=1)
proof_of_work(self, previous_hash="00000")
def mine_block():
previous_block = blockchain.previous_block()
previous_proof = previous_block['proof']
proof = blockchain.proof_of_work(previous_proof)
previous_hash = blockchain.hash(previous_block)
block = blockchain.create_block(proof, previous_hash)
# The sender is "0" to signify that this node has mined a new coin.
blockchain.new_transaction(
sender = "0",
recipient = node_identifier,
amount = 1
)
response = {
'message': 'Congratulations, you just mined a block!',
'index': block['index'],
'timestamp': block['timestamp'],
'proof': block['proof'],
'previous hash': block['previous_hash'],
'transaction': block['transaction']
}
return jsonify(response), 200
def mine():
# We run the proof of work algorithm to get the next proof...
last_block = blockchain.last_block
last_proof = last_block['proof']
proof = blockchain.proof_of_work(last_proof)
# We must receive a reward for finding the proof.
# The sender is "0" to signify that this node has mined a new coin.
blockchain.new_transaction(
sender="0",
recipient=node_identifier,
amount=1,
)
# Forge the new Block by adding it to the chain
previous_hash = blockchain.hash(last_block)
block = blockchain.new_block(proof, previous_hash)
response = {
'message': "New Block Forged",
'index': block['index'],
'transactions': block['transactions'],
'proof': block['proof'],
'previous_hash': block['previous_hash'],
}
return jsonify(response), 200
def mine(blockchain):
# 直前のブロックのハッシュ値を計算．リストの[-1]は最後の要素という意味．
previous_hash = calculate_hash(blockchain.chain[-1])
# proof_of_work関数を用いて、新しくブロックをマイニングしてください
proof_of_work(blockchain, previous_hash)
# current_transactionsとtransaction_indexを初期化してください
blockchain.current_transactions = []
blockchain.transaction_index = 0
# current_transactionsにコインベースを追加しています
blockchain.create_transaction(sender='0', recipient="my_address", amount=1)
blockchain.create_transaction(sender='0', recipient="my_address", amount=1)
block = blockchain.chain[-1]
# 新しいブロックの情報をresponseに代入しています
response = {
'message': '新しいブロックを採掘しました',
'index': block['index'],
'nonce': block['nonce'],
'previous_hash': block['previous_hash'],
}
return response
async def add_transaction(broadcast_outbox, transaction):
"""Adds a transaction to a block in the blockchain."""
TRANSACTIONS_QUEUE.append(transaction.__dict__)
print("transactions len:", len(TRANSACTIONS_QUEUE))
if len(TRANSACTIONS_QUEUE) >= 5:
previous_hash: str = None
if len(blockchain.blockchain) > 0:
previous_hash = blockchain.blockchain[len(blockchain.blockchain) -
1].hash
block = blockchain.Block(json.dumps(TRANSACTIONS_QUEUE), previous_hash)
hash_value, nonce = blockchain.proof_of_work(block, 1)
print(f"proof of work completed. Hash: {hash_value} Nonce:{nonce}")
block.hash_value = hash_value
block.nonce = nonce
block.timestamp = datetime.utcnow().strftime("%y/%m/%d %H:%M")
blockchain.blockchain.append(block)
await alert_all_nodes(broadcast_outbox, "new_block", block.__dict__)
TRANSACTIONS_QUEUE.clear()
def mine():
req = request.form.get('mine')
lt_block = blockchain.last_block
lt_proof = lt_block['proof']
proof = blockchain.proof_of_work(lt_proof, lt_block)
blockchain.new_transaction(sender='0', receiver=node_id, amount=1)
previous_hash = blockchain.hash(lt_block)
block = blockchain.new_block(proof, previous_hash)
response = {
'message': "Block created",
'index': block['index'],
'proof': block['proof'],
'previous_hash': block['previous_hash']
}
return render_template('/mine.html', response=response)
def thread_mine(current_index):
# sleep for a random number of seconds from 10 to 60 seconds to simulate mining
time.sleep(random.randint(1, 6))
last_block = blockchain.last_block
last_proof = last_block['proof']
proof = blockchain.proof_of_work(last_proof)
# if faulty, edit the hash to be incorrect
if blockchain.faulty:
proof = 0
previous_hash = blockchain.hash(last_block)
# if the blockchain is still the same length as when we started, add the new block
if len(blockchain.chain) == current_index:
# reward miner
blockchain.new_transaction(
1,
"0",
node_identifier,
1,
False,
)
blockchain.new_block(proof, previous_hash)
# print the new block mined
b_index = blockchain.last_block["index"]
b_hash = blockchain.last_block["previous_hash"]
b_proof = blockchain.last_block["proof"]
b_timestamp = blockchain.last_block["timestamp"]
mine_log.write(f"{b_index}, {b_hash}, {b_proof}, {b_timestamp}\n")
for transaction in blockchain.last_block["transactions"]:
mine_log.write(f"\t{transaction['trans_id']}\n")
# if we are proactively telling other nodes of the new chain
if blockchain.proactive:
proactive_consensus()
blockchain.mining = False
def mine():
last_block = blockchain.last_block
last_proof = last_block['proof']
proof = blockchain.proof_of_work(last_proof)
blockchain.new_transaction(sender="0", recipient=node_identifier, amount=1)
previous_hash = blockchain.hash(last_block)
block = blockchain.new_block(proof, previous_hash)
response = {
'message': "New block Forged",
'index': block['index'],
'transactions': block['transactions'],
'proof': block['proof'],
'previous_hash': block['previous_hash'],
}
return jsonify(response), 200
def mine():
last_blk = blockchain.last_block
last_proof = last_blk.proof
proof = blockchain.proof_of_work(last_proof)
blockchain.add_transaction(constant.MINER_KEY, node_address,
constant.MINER_REWARD, "")
prev_hash = last_blk.hash
blk = blockchain.add_block(proof, prev_hash)
response = {
'message': 'New block mined!',
'index': blk['index'],
'transactions': blk['transactions'],
'proof': blk['proof'],
'previous_hash': blk['prev_hash']
}
return jsonify(response), 201
def mine_block():
previous_block = blockchain.get_previous_block()
previous_proof = previous_block['proof']
proof = blockchain.proof_of_work(previous_proof)
previous_hash = blockchain.hash(previous_block)
# Transactions from newly mined block
blockchain.add_transaction(sender=blockchain.node_url,
receiver='Sab',
amount=1)
# Create Block for work done
block = blockchain.create_block(proof, previous_hash)
response = {
'message': 'Block mined!',
'index': block['index'],
'timestamp': block['timestamp'],
'proof': block['proof'],
'previous_hash': block['previous_hash'],
'transactions': block['transactions']
}
return jsonify(response), 200
def mine():
# We run the proof of work algorithm to get the next proof...
last_block = blockchain.last_block
last_proof = last_block['proof']
proof = blockchain.proof_of_work(last_proof)
# 给工作量证明的节点提供奖励.
# 发送者为 "0" 表明是新挖出的币
blockchain.new_transaction(
sender="0",
recipient=node_identifier,
amount=1,
)
# Forge the new Block by adding it to the chain
block = blockchain.new_block(proof)
response = {
'message': "New Block Forged",
'index': block['index'],
'transactions': block['transactions'],
'proof': block['proof'],
'previous_hash': block['previous_hash'],
}
return jsonify(response), 200