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Decred sighash and signing.

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This commit is contained in:
tecnovert
2024-04-27 16:27:14 +02:00
parent 150caeec40
commit ab472c04be
8 changed files with 256 additions and 31 deletions
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11
basicswap/interface/btc.py
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@@ -18,7 +18,6 @@ from basicswap.interface import (
Curves)
from basicswap.util import (
ensure,
make_int,
b2h, i2b, b2i, i2h)
from basicswap.util.ecc import (
ep,
@@ -763,7 +762,7 @@ class BTCInterface(Secp256k1Interface):
for pi in tx.vin:
ptx = self.rpc('getrawtransaction', [i2h(pi.prevout.hash), True])
prevout = ptx['vout'][pi.prevout.n]
inputs_value += make_int(prevout['value'])
inputs_value += self.make_int(prevout['value'])
prevout_type = prevout['scriptPubKey']['type']
if prevout_type == 'witness_v0_keyhash':
@@ -930,25 +929,25 @@ class BTCInterface(Secp256k1Interface):
return True
def signTx(self, key_bytes, tx_bytes, input_n, prevout_script, prevout_value):
def signTx(self, key_bytes: bytes, tx_bytes: bytes, input_n: int, prevout_script: bytes, prevout_value: int) -> bytes:
tx = self.loadTx(tx_bytes)
sig_hash = SegwitV0SignatureHash(prevout_script, tx, input_n, SIGHASH_ALL, prevout_value)
eck = PrivateKey(key_bytes)
return eck.sign(sig_hash, hasher=None) + bytes((SIGHASH_ALL,))
def signTxOtVES(self, key_sign, pubkey_encrypt, tx_bytes, input_n, prevout_script, prevout_value):
def signTxOtVES(self, key_sign: bytes, pubkey_encrypt: bytes, tx_bytes: bytes, input_n: int, prevout_script: bytes, prevout_value: int) -> bytes:
tx = self.loadTx(tx_bytes)
sig_hash = SegwitV0SignatureHash(prevout_script, tx, input_n, SIGHASH_ALL, prevout_value)
return ecdsaotves_enc_sign(key_sign, pubkey_encrypt, sig_hash)
def verifyTxOtVES(self, tx_bytes, ct, Ks, Ke, input_n, prevout_script, prevout_value):
def verifyTxOtVES(self, tx_bytes: bytes, ct: bytes, Ks: bytes, Ke: bytes, input_n: int, prevout_script: bytes, prevout_value):
tx = self.loadTx(tx_bytes)
sig_hash = SegwitV0SignatureHash(prevout_script, tx, input_n, SIGHASH_ALL, prevout_value)
return ecdsaotves_enc_verify(Ks, Ke, sig_hash, ct)
def decryptOtVES(self, k, esig):
def decryptOtVES(self, k: bytes, esig: bytes) -> bytes:
return ecdsaotves_dec_sig(k, esig) + bytes((SIGHASH_ALL,))
def verifyTxSig(self, tx_bytes: bytes, sig: bytes, K: bytes, input_n: int, prevout_script: bytes, prevout_value: int) -> bool: