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Merge pull request #543 from LedgerHQ/fix/apa/client_non_legacy_recover_transaction

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Fix recover_transaction function in Ragger client
This commit is contained in:
apaillier-ledger
2024-02-27 16:52:15 +01:00
committed by GitHub
parent 42774650ac 682354ce65
commit a76940b2fd
2 changed files with 11 additions and 12 deletions
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1
client/CHANGELOG.md
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@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Fixed
- Increased the delay between `autonext` callback calls for EIP-712 on Stax
- `recover_transaction` util function for non-legacy transactions
## [0.2.1] - 2023-12-01

22
client/src/ledger_app_clients/ethereum/utils.py
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@@ -17,24 +17,22 @@ def recover_message(msg, vrs: tuple) -> bytes:
return bytes.fromhex(addr[2:])
# TODO: Figure out why it doesn't work for non-legacy transactions
def recover_transaction(tx_params, vrs: tuple) -> bytes:
raw_tx = Account.create().sign_transaction(tx_params).rawTransaction
prefix = bytes()
if raw_tx[0] in [0x01, 0x02]:
prefix = raw_tx[:1]
raw_tx = raw_tx[len(prefix):]
if prefix == bytes():
# v is returned on one byte only so it might have overflowed
# in that case, we will reconstruct it to its full value
if "chainId" in tx_params:
trunc_chain_id = tx_params["chainId"]
while trunc_chain_id.bit_length() > 32:
trunc_chain_id >>= 8
target = tx_params["chainId"] * 2 + 35
trunc_target = trunc_chain_id * 2 + 35
diff = vrs[0][0] - (trunc_target & 0xff)
vrs = (target + diff, vrs[1], vrs[2])
# v is returned on one byte only so it might have overflowed
# in that case, we will reconstruct it to its full value
if "chainId" in tx_params:
trunc_chain_id = tx_params["chainId"]
while trunc_chain_id.bit_length() > 32:
trunc_chain_id >>= 8
target = tx_params["chainId"] * 2 + 35
trunc_target = trunc_chain_id * 2 + 35
diff = vrs[0][0] - (trunc_target & 0xff)
vrs = (target + diff, vrs[1], vrs[2])
decoded = rlp.decode(raw_tx)
reencoded = rlp.encode(decoded[:-3] + list(vrs))
addr = Account.recover_transaction(prefix + reencoded)