def test_coinjoin_input_account_path_mismatch(self):
authorization = CoinJoinAuthorization(self.msg_auth, None, self.coin)
tx = SignTx(outputs_count=201,
inputs_count=100,
coin_name=self.coin.coin_name,
lock_time=0)
approver = CoinJoinApprover(tx, self.coin, authorization)
txi = TxInputType(address_n=[H_(49), H_(0), H_(0), 0, 2],
amount=10000000,
script_type=InputScriptType.SPENDWITNESS)
with self.assertRaises(wire.ProcessError):
await_result(approver.add_internal_input(txi, txi.amount))
def test_coinjoin_lots_of_inputs(self):
denomination = 10000000
# Other's inputs.
inputs = [
TxInputType(
amount=denomination + 1000000 * (i + 1),
script_type=InputScriptType.EXTERNAL,
sequence=0xffffffff,
) for i in range(99)
]
# Our input.
inputs.insert(
30,
TxInputType(
address_n=[H_(84), H_(0), H_(0), 0, 1],
amount=denomination + 1000000,
script_type=InputScriptType.SPENDWITNESS,
sequence=0xffffffff,
))
# Other's CoinJoined outputs.
outputs = [
TxOutputType(
amount=denomination,
script_type=OutputScriptType.PAYTOWITNESS,
) for i in range(99)
]
# Our CoinJoined output.
outputs.insert(
40,
TxOutputType(
address_n=[H_(84), H_(0), H_(0), 0, 2],
amount=denomination,
script_type=OutputScriptType.PAYTOWITNESS,
))
coordinator_fee = self.fee_per_anonymity_percent / 100 * len(
outputs) * denomination
fees = coordinator_fee + 10000
total_coordinator_fee = coordinator_fee * len(outputs)
# Other's change-outputs.
outputs.extend(
TxOutputType(
amount=1000000 * (i + 1) - fees,
script_type=OutputScriptType.PAYTOWITNESS,
) for i in range(99))
# Our change-output.
outputs.append(
TxOutputType(
address_n=[H_(84), H_(0), H_(0), 1, 1],
amount=1000000 - fees,
script_type=OutputScriptType.PAYTOWITNESS,
))
# Coordinator's output.
outputs.append(
TxOutputType(
amount=total_coordinator_fee,
script_type=OutputScriptType.PAYTOWITNESS,
))
authorization = CoinJoinAuthorization(self.msg_auth, None, self.coin)
tx = SignTx(outputs_count=len(outputs),
inputs_count=len(inputs),
coin_name=self.coin.coin_name,
lock_time=0)
approver = CoinJoinApprover(tx, self.coin, authorization)
for txi in inputs:
if txi.script_type == InputScriptType.EXTERNAL:
approver.add_external_input(txi)
else:
await_result(approver.add_internal_input(txi, txi.amount))
for txo in outputs:
if txo.address_n:
approver.add_change_output(txo, script_pubkey=bytes(22))
else:
await_result(
approver.add_external_output(txo, script_pubkey=bytes(22)))
await_result(approver.approve_tx())
def test_coinjoin_lots_of_inputs(self):
denomination = 10000000
coordinator_fee = int(self.max_fee_rate_percent / 100 * denomination)
fees = coordinator_fee + 500
# Other's inputs.
inputs = [
TxInput(
prev_hash=b"",
prev_index=0,
amount=denomination,
script_pubkey=bytes(22),
script_type=InputScriptType.EXTERNAL,
sequence=0xffffffff,
witness="",
) for i in range(99)
]
# Our input.
inputs.insert(
30,
TxInput(
prev_hash=b"",
prev_index=0,
address_n=[H_(84), H_(0), H_(0), 0, 1],
amount=denomination,
script_type=InputScriptType.SPENDWITNESS,
sequence=0xffffffff,
))
# Other's CoinJoined outputs.
outputs = [
TxOutput(
address="",
amount=denomination - fees,
script_type=OutputScriptType.PAYTOWITNESS,
payment_req_index=0,
) for i in range(99)
]
# Our CoinJoined output.
outputs.insert(
40,
TxOutput(
address="",
address_n=[H_(84), H_(0), H_(0), 0, 2],
amount=denomination - fees,
script_type=OutputScriptType.PAYTOWITNESS,
payment_req_index=0,
))
# Coordinator's output.
outputs.append(
TxOutput(
address="",
amount=coordinator_fee * len(outputs),
script_type=OutputScriptType.PAYTOWITNESS,
payment_req_index=0,
))
authorization = CoinJoinAuthorization(self.msg_auth)
tx = SignTx(outputs_count=len(outputs),
inputs_count=len(inputs),
coin_name=self.coin.coin_name,
lock_time=0)
approver = CoinJoinApprover(tx, self.coin, authorization)
signer = Bitcoin(tx, None, self.coin, approver)
# Compute payment request signature.
# Private key of m/0h for "all all ... all" seed.
private_key = b'?S\ti\x8b\xc5o{,\xab\x03\x194\xea\xa8[_:\xeb\xdf\xce\xef\xe50\xf17D\x98`\xb9dj'
h_pr = HashWriter(sha256())
writers.write_bytes_fixed(h_pr, b"SL\x00\x24", 4)
writers.write_bytes_prefixed(h_pr, b"") # Empty nonce.
writers.write_bytes_prefixed(h_pr, self.coordinator_name.encode())
writers.write_compact_size(h_pr, 0) # No memos.
writers.write_uint32(h_pr, self.coin.slip44)
h_outputs = HashWriter(sha256())
for txo in outputs:
writers.write_uint64(h_outputs, txo.amount)
writers.write_bytes_prefixed(h_outputs, txo.address.encode())
writers.write_bytes_fixed(h_pr, h_outputs.get_digest(), 32)
signature = secp256k1.sign(private_key, h_pr.get_digest())
tx_ack_payment_req = TxAckPaymentRequest(
recipient_name=self.coordinator_name,
signature=signature,
)
for txi in inputs:
if txi.script_type == InputScriptType.EXTERNAL:
approver.add_external_input(txi)
else:
await_result(approver.add_internal_input(txi))
await_result(approver.add_payment_request(tx_ack_payment_req, None))
for txo in outputs:
if txo.address_n:
approver.add_change_output(txo, script_pubkey=bytes(22))
else:
await_result(
approver.add_external_output(txo, script_pubkey=bytes(22)))
await_result(approver.approve_tx(TxInfo(signer, tx), []))