from common import * # isort:skip from trezor.enums import InputScriptType from trezor.messages import PrevOutput, SignTx, TxInput from trezor.utils import HashWriter from apps.zcash.hasher import ZcashHasher, blake2b, write_hash # NOTE: moved into tests not to occupy flash space # in firmware binary, when it is not used in production def txid_digest(hasher: "ZcashHasher") -> bytes: """ Returns the transaction identifier. see: https://zips.z.cash/zip-0244#id4 """ h = HashWriter(blake2b(outlen=32, personal=hasher.tx_hash_person)) write_hash(h, hasher.header.digest()) # T.1 write_hash(h, hasher.transparent.digest()) # T.2 write_hash(h, hasher.sapling.digest()) # T.3 write_hash(h, hasher.orchard.digest()) # T.4 return h.get_digest() @unittest.skipUnless(not utils.BITCOIN_ONLY, "altcoin") class TestZcashSigHasher(unittest.TestCase): def test_zcash_hasher(self): # this test vector was generated using # https://github.com/zcash-hackworks/zcash-test-vectors tx = SignTx( coin_name="Zcash", version=5, version_group_id=648488714, branch_id=928093729, lock_time=2591264634, expiry=36466477, inputs_count=3, outputs_count=3, ) inputs = [ TxInput( prev_hash=unhexlify( "4f61d91843ccb386dd1c482169eef62efaaf9d9364b1666e4d4c299e04a852e1" ), prev_index=1569726664, multisig=None, amount=1249971475008092, script_type=InputScriptType.SPENDADDRESS, sequence=0x8849F2A3, script_pubkey=unhexlify( "76a9149466817faf329208fc3c3ef42ce4513d22fc1f9b88ac" ), ), TxInput( prev_hash=unhexlify( "368e9c7e1fe01f6c54db9379a94c2941ef180c25b869bf8dcdb1cf014253b3c7" ), prev_index=2648876502, multisig=None, amount=1353789347081201, script_type=InputScriptType.SPENDADDRESS, sequence=0x8A37691C, script_pubkey=unhexlify( "76a9142275979f97043edd9a6083ee27d136727ce5f42888ac" ), ), TxInput( prev_hash=unhexlify( "f5621d6ad566c13dce81632a9168694bb6bcec2f7bfac2626f9425e1640fe4f1" ), prev_index=492165032, multisig=None, amount=1672802384749611, script_type=InputScriptType.SPENDADDRESS, sequence=0x6A993D20, script_pubkey=unhexlify( "76a914682c89bfc3940621bd4a4bfc349a79b46ce707e388ac" ), ), ] outputs = [ PrevOutput( amount=865034086766210, script_pubkey=unhexlify( "76a9140d06a745f44ab023752cb5b406ed8985e18130ab88ac" ), ), PrevOutput( amount=2088955338922857, script_pubkey=unhexlify( "76a91463ccb8f676495c222f7fba1e31defa3d5a57efc288ac" ), ), PrevOutput( amount=1760123755646275, script_pubkey=unhexlify( "76a914fb1a38e01d94903d3c3e0ad3360c1d3710acd20b88ac" ), ), ] pubkeys = [ unhexlify( "02ed9c769c787fda78a7da13764707d14217e74e26428b47a2a8fe6d5a0bc46196" ), unhexlify( "0219ac5de9a45f76e7efede5259acd94bb047ab8e7cc60fe844cb32317072ebbf3" ), unhexlify( "02829099a7cf1f617c956c0222e7b77ae331813d6a736eab3c5f6344d961843d39" ), ] expected_txid = unhexlify( "c91d34ecc44484b07ee573f385d80e57e4e57571bb86aa6ec6c44d654123e4e9" ) expected_sighashes = [ unhexlify( "4d82669c8c0e9b1f26d59bcb347212f2d044eeb839fce21e039d8bb082bbc343" ), unhexlify( "2e2a27d78d117e28760d3c972f9614547ec57688c970f06c19c515cded6b030c" ), unhexlify( "d0a92ffd4a4d262f5b84598bcfca741a42c17b8e9d26cf4fd87839df8f33e4ee" ), ] hasher = ZcashHasher(tx) for txi in inputs: hasher.add_input(txi, txi.script_pubkey) for txo in outputs: hasher.add_output(txo, txo.script_pubkey) # test ZcashSigHasher.txid_digest computed_txid = txid_digest(hasher) self.assertEqual(computed_txid, expected_txid) # test ZcashSigHasher.signature_digest for txi, expected_sighash, pk in zip(inputs, expected_sighashes, pubkeys): computed_sighash = hasher.signature_digest(txi, txi.script_pubkey) self.assertEqual(computed_sighash, expected_sighash) if __name__ == "__main__": unittest.main()