def send(from_addr, to_addr, amount):
bc = Blockchain()
utxo_set = UTXOSet(bc)
tx = UTXOTx(from_addr, to_addr, amount, utxo_set)
inputs = []
outputs = []
for vin in tx.vin:
ctxin = TXInput()
ctxin._tx_id = vin.tx_id
ctxin._vin = vin.vout
ctxin._sig = vin.signature
ctxin._public_key = vin.public_key
inputs.append(ctxin)
for vout in tx.vout:
outputs.append(TXOutput(vout.value, vout.address))
txnew = Transaction()
txnew._id = tx.ID
txnew._vin = inputs
txnew._vout = outputs
return txnew
def __init__(self, from_addr, to_addr, amount, utxo_set):
inputs = []
outputs = []
# log('UTXOTx')
wallets = ws.Wallets()
wallet = wallets.get_wallet(from_addr)
pubkey_hash = utils.hash_public_key(wallet.public_key)
acc, valid_outputs = utxo_set.find_spendable_outputs(
pubkey_hash, amount)
if acc < amount:
# log.error('Not enough funds')
utils.logg('Not enough funds')
sys.exit()
# Build a list of inputs
for tx_id, outs in valid_outputs.items():
for out in outs:
ctxin = TXInput()
ctxin._tx_id = tx_id
ctxin._vout = out
ctxin._signature = None
ctxin._public_key = wallet.public_key
inputs.append(ctxin)
# Build a list of outputs
outputs.append(TXOutput(amount, to_addr))
if acc > amount:
# A change
outputs.append(TXOutput(acc-amount, from_addr))
self._tx = Transaction()
self._tx.vin = inputs
self._tx.vout = outputs
self._tx.set_id()
self._utxo_set = utxo_set
self._sign_utxo(wallet.private_key)
def _trimmed_copy(self):
inputs = []
outputs = []
for vin in self.vin:
ctxin = TXInput()
ctxin._tx_id = vin.tx_id
ctxin._vin = vin.vout
ctxin._sig = None
ctxin._public_key = None
inputs.append(ctxin)
for vout in self.vout:
outputs.append(TXOutput(vout.value, vout.address))
txnew = Transaction()
txnew._id = self.ID
txnew._vin = inputs
txnew._vout = outputs
return txnew
