def construct_transaction(sender_privkey, sender, recipient, amount,
utxo_list):
# collect all outputs necessary to pay that amount of money
outputs_to_spend = []
value_to_spend = 0
for outp in utxo_list:
outputs_to_spend.append(outp)
value_to_spend += outp.value
if value_to_spend >= amount:
break
# convert all outputs we are going to use in the ouputs
# create outputs: to the recipient and change for the sender(if needed)
outputs = [Output(amount, construct_transaction_locking_script(recipient))]
if value_to_spend > amount:
outputs.append(
Output(value_to_spend - amount,
construct_transaction_locking_script(sender)))
inputs_with_no_script = [
Input(outp.txid, outp.vout, "") for outp in outputs_to_spend
]
inputs = []
for inp in inputs_with_no_script:
inputs.append(
Input(
inp.txid, inp.vout,
construct_transaction_unlocking_script(sender_privkey,
inputs_with_no_script,
outputs, 0, utxo_list)))
return Transaction(inputs, outputs, locktime=0)
def test_forming_sw_transaction_with_bech32_recipient_address(self):
sender_privkey = "936abdc0429eb4b38a045fcb8f531ff7cf3888c3a83797df5d033106c4ea6a20"
sender_address = "1NERjvtBxL5ErAKhCC3mfgWbp3QMd8y6ba"
recipient_address = "tb1qtpjzz4h24ghxxvc79c99vln7ycwe8stldvz9v6"
utxo_list = [
Output(
5000000000,
"76a914e8e4b375038b0a1a1dc70543eab7ea6ce279df4388ac",
txid=
"07c0efe33946c5f81b5a86d79eda89e47979d4796d5ec675a9fccde7c31c4f50",
vout=1)
]
formed_tx = construct_witness_transaction(sender_privkey,
sender_address,
recipient_address, 800,
utxo_list)
self.assertEqual(2, len(formed_tx.outputs))
outp1 = formed_tx.outputs[0]
outp2 = formed_tx.outputs[1]
self.assertTrue(outp1.value + outp2.value <= 5000000000)
self.assertEqual(800, outp1.value)
self.assertEqual(1, len(formed_tx.witness))
self.assertEqual("", formed_tx.inputs[0].scriptsig)
def test_forming_sw_transaction(self):
sender_privkey = "936abdc0429eb4b38a045fcb8f531ff7cf3888c3a83797df5d033106c4ea6a20"
sender_address = "1NERjvtBxL5ErAKhCC3mfgWbp3QMd8y6ba"
recipient_address = "1K9moTCMoSrA9bNdYTgMt6ac1nim83xScU"
utxo_list = [
Output(
5000000000,
"76a914e8e4b375038b0a1a1dc70543eab7ea6ce279df4388ac",
txid=
"07c0efe33946c5f81b5a86d79eda89e47979d4796d5ec675a9fccde7c31c4f50",
vout=1)
]
formed_tx = construct_witness_transaction(sender_privkey,
sender_address,
recipient_address, 800,
utxo_list)
self.assertEqual(2, len(formed_tx.outputs))
outp1 = formed_tx.outputs[0]
outp2 = formed_tx.outputs[1]
self.assertTrue(outp1.value + outp2.value <= 5000000000)
self.assertEqual(800, outp1.value)
self.assertEqual("0014c71afd5d2303c987ce8a4882ccb5c06636aaa224",
outp1.scriptpubkey)
self.assertEqual(1, len(formed_tx.witness))
self.assertEqual("", formed_tx.inputs[0].scriptsig)
def test_contains(self):
storage = UTXOStorage(self.storage_filepath)
storage.delete_all_otputs()
outp0 = Output("", 10, txid="07c0efe33946c5f81b5a86d79eda89e47979d4796d5ec675a9fccde7c31c4f50", vout=1)
self.assertFalse(storage.contains_output(outp0))
storage.add_new_output(outp0)
self.assertTrue(storage.contains_output(outp0))
def update_with_new_transaction(self, tx: Transaction):
outputs = self.get_all_outputs()
for i in tx.inputs:
used_output = Output(0, "", i.txid, i.vout)
# todo ? return false if there is no such output
self.delete_ouput_if_exists(used_output)
for i, o in zip(range(1, len(tx.outputs) + 1), tx.outputs):
o.txid = tx.txid
o.vout = i
self.add_new_output(o)
return True
def test_get_all_unspent_outputs_for_address(self):
storage = UTXOStorage(self.storage_filepath)
storage.delete_all_otputs()
outp1 = Output(
900,
"76a914cabf271134a5f9228132598c8b4e6ad4586532f888ac",
txid="1423215db125380dd21051c0d22f31fd4be2a25794b8789796343f4015c1baff",
vout=1
)
outp2 = Output(
4999999100,
"76a914e8e4b375038b0a1a1dc70543eab7ea6ce279df4388ac",
txid="1423215db125380dd21051c0d22f31fd4be2a25794b8789796343f4015c1baff",
vout=2
)
storage.add_new_output(outp1)
storage.add_new_output(outp2)
outp_list = storage.get_all_unspent_outputs_for_address("1KV2VGQiTB1B5KPEyyEPvifcqfS6PUxdxj")
self.assertTrue(outp1 in outp_list)
self.assertFalse(outp2 in outp_list)
def test_updating_utxo_pool_with_tx(self):
storage = UTXOStorage(self.storage_filepath)
storage.delete_all_otputs()
outp0 = Output("", 10, txid="07c0efe33946c5f81b5a86d79eda89e47979d4796d5ec675a9fccde7c31c4f50", vout=1)
storage.add_new_output(outp0)
outp1 = Output(
900,
"76a914cabf271134a5f9228132598c8b4e6ad4586532f888ac",
txid="1423215db125380dd21051c0d22f31fd4be2a25794b8789796343f4015c1baff",
vout=1
)
outp2 = Output(
4999999100,
"76a914e8e4b375038b0a1a1dc70543eab7ea6ce279df4388ac",
txid="1423215db125380dd21051c0d22f31fd4be2a25794b8789796343f4015c1baff",
vout=2
)
tx = Transaction(
[
Input(
"07c0efe33946c5f81b5a86d79eda89e47979d4796d5ec675a9fccde7c31c4f50",
1,
"404bb493aa8509356c1295c65acd3a44c339729d865422a47cb15631cda545ee3fc2eb86b418a5bb90202040430b723fdbf8429ff232bfa521c25da09539644093410450e829ca678c60031a11b990fea865e03ba35d0579aa62750b918b98c4b935d803ecc57a4bb2fc2ab1193a87fca5386d71516aca89df267fc907bcb3b84d396a"
)
],
[outp1, outp2],
0
)
storage.update_with_new_transaction(tx)
outp_list = storage.get_all_outputs()
self.assertFalse(outp0 in outp_list)
self.assertTrue(outp1 in outp_list)
self.assertTrue(outp2 in outp_list)
def test_raw_transaction_creation(self):
inputs = [Input(
"fc9e4f9c334d55c1dc535bd691a1c159b0f7314c54745522257a905e18a56779",
1,
""
)]
outputs = [Output(
2207563,
"0014db4d1141d0048b1ed15839d0b7a4c488cd368b0e"
)]
witness = ["47304402206a2eb16b7b92051d0fa38c133e67684ed064effada1d7f925c842da401d4f22702201f196b10e6e4b4a9fff948e5c5d71ec5da53e90529c8dbd122bff2b1d21dc8a90121039b7bcd0824b9a9164f7ba098408e63e5b7e3cf90835cceb19868f54f8961a825"]
tx = Transaction(inputs, outputs, locktime=0, witness=witness, version=2)
raw_tx = "020000000001017967a5185e907a25225574544c31f7b059c1a191d65b53dcc1554d339c4f9efc0100000000ffffffff014baf210000000000160014db4d1141d0048b1ed15839d0b7a4c488cd368b0e016a47304402206a2eb16b7b92051d0fa38c133e67684ed064effada1d7f925c842da401d4f22702201f196b10e6e4b4a9fff948e5c5d71ec5da53e90529c8dbd122bff2b1d21dc8a90121039b7bcd0824b9a9164f7ba098408e63e5b7e3cf90835cceb19868f54f8961a82500000000"
self.assertEqual(raw_tx, Serializer.serialize_transaction(tx))
def test_deserialize_sw_transaction(self):
sender_privkey = "936abdc0429eb4b38a045fcb8f531ff7cf3888c3a83797df5d033106c4ea6a20"
sender_address = "1NERjvtBxL5ErAKhCC3mfgWbp3QMd8y6ba"
recipient_address = "1K9moTCMoSrA9bNdYTgMt6ac1nim83xScU"
utxo_list = [
Output(
5000000000,
"76a914e8e4b375038b0a1a1dc70543eab7ea6ce279df4388ac",
txid="07c0efe33946c5f81b5a86d79eda89e47979d4796d5ec675a9fccde7c31c4f50",
vout=1
)
]
formed_tx = construct_witness_transaction(sender_privkey, sender_address, recipient_address, 800, utxo_list)
serialized = Serializer.serialize_sw_transaction(formed_tx)
self.assertEqual(formed_tx, Deserializer.deserialize_transaction(serialized))