def sendCoins(self):
sendAtp = self.amountBox.get()
recipientKey = self.recipient_pubkey.get()
sendFee = self.feeBox.get()
if not sendAtp:
messagebox.showwarning('Warning',
'Please enter the Amount to pay.')
elif len(recipientKey) <= 1:
messagebox.showwarning('Warning',
'Please enter the Recipient Address.')
elif not sendFee:
sendFee = 0
else:
result = messagebox.askyesno(
'Confirmation', 'Sending {} SimpleBitcoins to :\n {}'.format(
sendAtp, recipientKey))
if result:
if 0 < len(self.um.utxo_txs):
print('Sending {} SimpleBitcoins to reciever:\n {}'.format(
sendAtp, recipientKey))
else:
messagebox.showwarning('Short of Coin.',
'Not enough coin to be sent...')
return
utxo, idx = self.um.get_utxo_tx(0)
t = Transaction([TransactionInput(utxo, idx)],
[TransactionOutput(recipientKey, sendAtp)])
counter = 1
# TransactionInputが送信額を超えるまで繰り返して取得しTransactionとして完成させる
while t.is_enough_inputs(sendFee) is not True:
new_utxo, new_idx = self.um.get_utxo_tx(counter)
t.inputs.append(TransactionInput(new_utxo, new_idx))
counter += 1
if counter > len(self.um.utxo_txs):
messagebox.showwarning('Short of Coin.',
'Not enough coin to be sent...')
break
# 正常なTransactionが生成できた時だけ秘密鍵で署名を実行する
if t.is_enough_inputs(sendFee) is True:
# まずお釣り用Transactionを作る
change = t.compute_change(sendFee)
t.outputs.append(
TransactionOutput(self.km.my_address(), change))
to_be_signed = json.dumps(t.to_dict(), sort_keys=True)
signed = self.km.compute_digital_signature(to_be_signed)
new_tx = json.loads(to_be_signed)
new_tx['signature'] = signed
# TODO: 本来はここで出来上がったTransactionを送信する処理を入れる
print('signed new_tx:', json.dumps(new_tx))
# 実験的にお釣り分の勘定のため新しく生成したTransactionをUTXOとして追加しておくが
# 本来はブロックチェーンの更新に合わせて再計算した方が適切
self.um.put_utxo_tx(t.to_dict())
to_be_deleted = 0
del_list = []
while to_be_deleted < counter:
del_tx = self.um.get_utxo_tx(to_be_deleted)
del_list.append(del_tx)
to_be_deleted += 1
for dx in del_list:
self.um.remove_utxo_tx(dx)
self.amountBox.delete(0, END)
self.feeBox.delete(0, END)
self.recipient_pubkey.delete(0, END)
self.update_balance()
