def new_transaction(self, from_addr, to_addr, amount, fee):
inputs = []
outputs = []
ifname = 'ens33' # enp2s0
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
ip = socket.inet_ntoa(
fcntl.ioctl(s.fileno(), 0x8915,
struct.pack('256s', bytes(ifname[:15],
'utf-8')))[20:24])
wallets = Wallets()
from_wallet = wallets[from_addr]
pub_key = from_wallet.public_key
acc, valid_outpus = self._find_spendable_outputs(from_addr, amount)
# if acc < amount + fee: # change
# raise NotEnoughAmountError(u'not enough coin')
for fout in valid_outpus:
index = fout.index
txid = fout.txid
input = TXInput(txid, index, pub_key)
inputs.append(input)
output = TXOutput(amount, to_addr)
outputs.append(output)
if acc > amount + fee: # change
# a change
outputs.append(TXOutput(acc - amount - fee, from_addr)) # change
tx = Transaction(inputs, outputs, fee, ip) # change
tx.set_id()
self.sign_transaction(tx, from_wallet.private_key)
return tx
