def create_transaction(receiver_public_keys: List[str],
amounts: List[int],
sender_public_key,
message="") -> Transaction:
vout = {}
vin = {}
current_amount = 0
total_amount = sum(amounts)
i = 0
for so, utxo_list in BLOCKCHAIN.active_chain.utxo.utxo.items():
tx_out = utxo_list[0]
if current_amount >= total_amount:
break
if tx_out.address == sender_public_key:
current_amount += tx_out.amount
vin[i] = TxIn(payout=SingleOutput.from_json(so),
pub_key=sender_public_key,
sig="")
i += 1
for i, address in enumerate(receiver_public_keys):
vout[i] = TxOut(amount=amounts[i], address=address)
change = (current_amount - total_amount)
if change > 0:
vout[i + 1] = TxOut(amount=change, address=sender_public_key)
tx = Transaction(version=consts.MINER_VERSION,
locktime=0,
timestamp=int(time.time()),
vin=vin,
vout=vout,
message=message)
return tx
def calculate_transaction_fees(tx: Transaction, w: Wallet, bounty: int,
fees: int):
current_amount = 0
i = 0
for so, utxo_list in BLOCKCHAIN.active_chain.utxo.utxo.items():
tx_out = utxo_list[0]
if utxo_list[2]:
# check for coinbase TxIn Maturity
if not (BLOCKCHAIN.active_chain.length -
utxo_list[1].height) >= consts.COINBASE_MATURITY:
continue
if current_amount >= bounty + fees:
break
if tx_out.address == w.public_key:
current_amount += tx_out.amount
tx.vin[i] = TxIn(payout=SingleOutput.from_json(so),
pub_key=w.public_key,
sig="")
i += 1
tx.vout[1].amount = current_amount - bounty - fees
tx.fees = fees
tx.sign(w)
def fetch_peer_list():
r = requests.get(consts.SEED_SERVER_URL)
peer_list = json.loads(r.text)
return peer_list
def get_peer_url(peer: Dict[str, Any]) -> str:
return "http://" + str(peer["ip"]) + ":" + str(peer["port"])
if __name__ == "__main__":
# The singleOutput for first coinbase transaction in genesis block
so = SingleOutput(txid=dhash(first_block_transaction[0]), vout=0)
first_transaction = Transaction(
version=1,
locktime=0,
timestamp=3,
is_coinbase=False,
fees=4000000000,
vin={0: TxIn(payout=so, sig="", pub_key=consts.WALLET_PUBLIC)},
vout={0: TxOut(amount=1000000000, address=consts.WALLET_PUBLIC)}
)
sign_copy_of_tx = copy.deepcopy(first_transaction)
sign_copy_of_tx.vin = {}
w = Wallet()
w.public_key = consts.WALLET_PUBLIC
return get_block_from_db(hhash)
return "Hash hi nahi bheja LOL"
@app.route("/getblockhashes", methods=["POST"])
def send_block_hashes():
peer_height = int(request.form.get("myheight"))
hash_list = []
for i in range(peer_height, ACTIVE_CHAIN.length):
hash_list.append(dhash(ACTIVE_CHAIN.header_list[i]))
logger.debug(peer_height)
return jsonify(hash_list)
# The singleOutput for first coinbase transaction in genesis block
so = SingleOutput(txid=dhash(genesis_block_transaction[0]), vout=0)
first_block_transactions = [
Transaction(
version=1,
locktime=0,
timestamp=2,
is_coinbase=True,
fees=0,
vin={0: TxIn(payout=None, sig="", pub_key=consts.WALLET_PUBLIC)},
vout={
0: TxOut(amount=5000000000, address=consts.WALLET_PUBLIC),
1: TxOut(amount=4000000000, address=consts.WALLET_PUBLIC),
},
),
Transaction(