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Code Issues Releases Wiki Activity

Don't require prevtx for coins with BIP-143 fork id (#352)

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Coins like Bitcoin Cash and Bitcoin Gold always use BIP-143 signatures
that do not require previous transactions.
This commit is contained in:
Jochen Hoenicke 2019-01-07 12:57:12 +01:00 committed by matejcik
parent 369b704f6b
commit 0428f5091c
1 changed files with 19 additions and 14 deletions
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33
trezorlib/btc.py
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@ -14,7 +14,7 @@
# You should have received a copy of the License along with this library.
# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
from . import messages
from . import coins, messages
from .tools import CallException, expect, normalize_nfc, session
@ -91,19 +91,24 @@ def sign_tx(client, coin_name, inputs, outputs, details=None, prev_txes=None):
# set up a transactions dict
txes = {None: messages.TransactionType(inputs=inputs, outputs=outputs)}
# preload all relevant transactions ahead of time
for inp in inputs:
if inp.script_type not in (
messages.InputScriptType.SPENDP2SHWITNESS,
messages.InputScriptType.SPENDWITNESS,
messages.InputScriptType.EXTERNAL,
):
try:
prev_tx = prev_txes[inp.prev_hash]
except Exception as e:
raise ValueError("Could not retrieve prev_tx") from e
if not isinstance(prev_tx, messages.TransactionType):
raise ValueError("Invalid value for prev_tx") from None
txes[inp.prev_hash] = prev_tx
if coin_name in coins.by_name:
load_prevtxes = not coins.by_name[coin_name]["force_bip143"]
else:
load_prevtxes = True
if load_prevtxes:
for inp in inputs:
if inp.script_type not in (
messages.InputScriptType.SPENDP2SHWITNESS,
messages.InputScriptType.SPENDWITNESS,
messages.InputScriptType.EXTERNAL,
):
try:
prev_tx = prev_txes[inp.prev_hash]
except Exception as e:
raise ValueError("Could not retrieve prev_tx") from e
if not isinstance(prev_tx, messages.TransactionType):
raise ValueError("Invalid value for prev_tx") from None
txes[inp.prev_hash] = prev_tx
if details is None:
signtx = messages.SignTx()