mirror of
https://github.com/trezor/trezor-firmware.git
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242 lines
8.3 KiB
Python
242 lines
8.3 KiB
Python
from common import H_, await_result, unittest # isort:skip
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import storage.cache
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from trezor import wire
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from trezor.crypto import bip32
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from trezor.crypto.curve import bip340, secp256k1
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from trezor.crypto.hashlib import sha256
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from trezor.enums import InputScriptType, OutputScriptType
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from trezor.messages import (
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AuthorizeCoinJoin,
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CoinJoinRequest,
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SignTx,
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TxInput,
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TxOutput,
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)
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from trezor.utils import HashWriter
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from apps.bitcoin import writers
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from apps.bitcoin.authorization import FEE_RATE_DECIMALS, CoinJoinAuthorization
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from apps.bitcoin.sign_tx.approvers import CoinJoinApprover
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from apps.bitcoin.sign_tx.bitcoin import Bitcoin
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from apps.bitcoin.sign_tx.tx_info import TxInfo
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from apps.common import coins
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class TestApprover(unittest.TestCase):
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def setUp(self):
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self.coin = coins.by_name("Bitcoin")
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self.fee_rate_percent = 0.3
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self.no_fee_threshold = 1000000
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self.min_registrable_amount = 5000
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self.coordinator_name = "www.example.com"
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# Private key for signing and masking CoinJoin requests.
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# m/0h for "all all ... all" seed.
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self.private_key = b"?S\ti\x8b\xc5o{,\xab\x03\x194\xea\xa8[_:\xeb\xdf\xce\xef\xe50\xf17D\x98`\xb9dj"
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self.node = bip32.HDNode(
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depth=0,
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fingerprint=0,
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child_num=0,
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chain_code=bytearray(32),
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private_key=b"\x01" * 32,
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curve_name="secp256k1",
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)
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self.tweaked_node_pubkey = b"\x02" + bip340.tweak_public_key(
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self.node.public_key()[1:]
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)
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self.msg_auth = AuthorizeCoinJoin(
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coordinator=self.coordinator_name,
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max_rounds=10,
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max_coordinator_fee_rate=int(
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self.fee_rate_percent * 10**FEE_RATE_DECIMALS
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),
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max_fee_per_kvbyte=7000,
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address_n=[H_(10025), H_(0), H_(0), H_(1)],
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coin_name=self.coin.coin_name,
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script_type=InputScriptType.SPENDTAPROOT,
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)
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storage.cache.start_session()
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def make_coinjoin_request(self, inputs):
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mask_public_key = secp256k1.publickey(self.private_key)
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coinjoin_flags = bytearray()
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for txi in inputs:
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shared_secret = secp256k1.multiply(
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self.private_key, self.tweaked_node_pubkey
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)[1:33]
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h_mask = HashWriter(sha256())
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writers.write_bytes_fixed(h_mask, shared_secret, 32)
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writers.write_bytes_reversed(h_mask, txi.prev_hash, writers.TX_HASH_SIZE)
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writers.write_uint32(h_mask, txi.prev_index)
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mask = h_mask.get_digest()[0] & 1
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signable = txi.script_type == InputScriptType.SPENDTAPROOT
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txi.coinjoin_flags = signable ^ mask
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coinjoin_flags.append(txi.coinjoin_flags)
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# Compute CoinJoin request signature.
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h_request = HashWriter(sha256(b"CJR1"))
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writers.write_bytes_prefixed(h_request, self.coordinator_name.encode())
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writers.write_uint32(h_request, self.coin.slip44)
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writers.write_uint32(
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h_request, int(self.fee_rate_percent * 10**FEE_RATE_DECIMALS)
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)
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writers.write_uint64(h_request, self.no_fee_threshold)
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writers.write_uint64(h_request, self.min_registrable_amount)
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writers.write_bytes_fixed(h_request, mask_public_key, 33)
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writers.write_bytes_prefixed(h_request, coinjoin_flags)
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writers.write_bytes_fixed(h_request, sha256().digest(), 32)
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writers.write_bytes_fixed(h_request, sha256().digest(), 32)
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signature = secp256k1.sign(self.private_key, h_request.get_digest())
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return CoinJoinRequest(
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fee_rate=int(self.fee_rate_percent * 10**FEE_RATE_DECIMALS),
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no_fee_threshold=self.no_fee_threshold,
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min_registrable_amount=self.min_registrable_amount,
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mask_public_key=mask_public_key,
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signature=signature,
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)
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def test_coinjoin_lots_of_inputs(self):
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denomination = 10_000_000
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coordinator_fee = int(self.fee_rate_percent / 100 * denomination)
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fees = coordinator_fee + 500
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# Other's inputs.
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inputs = [
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TxInput(
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prev_hash=bytes(32),
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prev_index=0,
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amount=denomination,
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script_pubkey=bytes(22),
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script_type=InputScriptType.EXTERNAL,
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sequence=0xFFFFFFFF,
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witness="",
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)
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for i in range(99)
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]
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# Our input.
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inputs.insert(
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30,
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TxInput(
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prev_hash=bytes(32),
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prev_index=0,
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address_n=[H_(10025), H_(0), H_(0), H_(1), 0, 1],
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amount=denomination,
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script_type=InputScriptType.SPENDTAPROOT,
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sequence=0xFFFFFFFF,
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),
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)
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# Other's CoinJoined outputs.
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outputs = [
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TxOutput(
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address="",
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amount=denomination - fees,
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script_type=OutputScriptType.PAYTOTAPROOT,
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payment_req_index=0,
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)
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for i in range(99)
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]
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# Our CoinJoined output.
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outputs.insert(
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40,
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TxOutput(
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address="",
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address_n=[H_(10025), H_(0), H_(0), H_(1), 0, 2],
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amount=denomination - fees,
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script_type=OutputScriptType.PAYTOTAPROOT,
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payment_req_index=0,
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),
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)
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# Coordinator's output.
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outputs.append(
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TxOutput(
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address="",
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amount=coordinator_fee * len(outputs),
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script_type=OutputScriptType.PAYTOTAPROOT,
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payment_req_index=0,
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)
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)
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coinjoin_req = self.make_coinjoin_request(inputs)
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tx = SignTx(
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outputs_count=len(outputs),
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inputs_count=len(inputs),
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coin_name=self.coin.coin_name,
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lock_time=0,
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coinjoin_request=coinjoin_req,
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)
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authorization = CoinJoinAuthorization(self.msg_auth)
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approver = CoinJoinApprover(tx, self.coin, authorization)
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signer = Bitcoin(tx, None, self.coin, approver)
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for txi in inputs:
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if txi.script_type == InputScriptType.EXTERNAL:
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approver.add_external_input(txi)
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else:
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await_result(approver.add_internal_input(txi, self.node))
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for txo in outputs:
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if txo.address_n:
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await_result(approver.add_change_output(txo, script_pubkey=bytes(22)))
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else:
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await_result(approver.add_external_output(txo, script_pubkey=bytes(22)))
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await_result(approver.approve_tx(TxInfo(signer, tx), [], None))
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def test_coinjoin_input_account_depth_mismatch(self):
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txi = TxInput(
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prev_hash=bytes(32),
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prev_index=0,
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address_n=[H_(10025), H_(0), H_(0), H_(1), 0],
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amount=10000000,
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script_type=InputScriptType.SPENDTAPROOT,
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)
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coinjoin_req = self.make_coinjoin_request([txi])
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tx = SignTx(
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outputs_count=201,
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inputs_count=100,
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coin_name=self.coin.coin_name,
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lock_time=0,
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coinjoin_request=coinjoin_req,
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)
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authorization = CoinJoinAuthorization(self.msg_auth)
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approver = CoinJoinApprover(tx, self.coin, authorization)
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with self.assertRaises(wire.ProcessError):
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await_result(approver.add_internal_input(txi, self.node))
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def test_coinjoin_input_account_path_mismatch(self):
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txi = TxInput(
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prev_hash=bytes(32),
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prev_index=0,
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address_n=[H_(10025), H_(0), H_(1), H_(1), 0, 0],
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amount=10000000,
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script_type=InputScriptType.SPENDTAPROOT,
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)
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coinjoin_req = self.make_coinjoin_request([txi])
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tx = SignTx(
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outputs_count=201,
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inputs_count=100,
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coin_name=self.coin.coin_name,
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lock_time=0,
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coinjoin_request=coinjoin_req,
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)
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authorization = CoinJoinAuthorization(self.msg_auth)
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approver = CoinJoinApprover(tx, self.coin, authorization)
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with self.assertRaises(wire.ProcessError):
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await_result(approver.add_internal_input(txi, self.node))
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if __name__ == "__main__":
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unittest.main()
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