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Code Issues Releases Wiki Activity

signing/scripts: generic exceptions not used

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This commit is contained in:
Tomas Susanka 2018-02-12 09:47:32 +01:00 committed by Jan Pochyla
parent 805593c1ac
commit 01317eef18
1 changed files with 9 additions and 4 deletions
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13
src/apps/wallet/sign_tx/scripts.py
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@ -3,6 +3,11 @@ from apps.wallet.sign_tx.writers import *
from trezor.crypto.hashlib import sha256, ripemd160
from apps.wallet.sign_tx.multisig import multisig_get_pubkeys
class ScriptsError(ValueError):
pass
# TX Scripts
# ===
@ -109,7 +114,7 @@ def input_script_p2wpkh_in_p2sh(pubkeyhash: bytes) -> bytearray:
# signature is moved to the witness
def input_script_p2wsh_in_p2sh(script_hash: bytes) -> bytearray:
if len(script_hash) != 32:
raise Exception('Redeem script hash should be 32 bytes long')
raise ScriptsError('Redeem script hash should be 32 bytes long')
w = bytearray_with_cap(3 + len(script_hash))
w.append(0x22) # length of the data
@ -187,7 +192,7 @@ def output_script_multisig_p2sh(pubkeys, m) -> bytes:
def output_script_multisig_p2wsh(pubkeys, m) -> bytes:
for pubkey in pubkeys:
if len(pubkey) != 33:
raise Exception # only compressed public keys are allowed for P2WSH
raise ScriptsError('Only compressed public keys are allowed for P2WSH')
script = script_multisig(pubkeys, m)
return sha256(script).digest()
@ -195,9 +200,9 @@ def output_script_multisig_p2wsh(pubkeys, m) -> bytes:
def script_multisig(pubkeys, m) -> bytearray:
n = len(pubkeys)
if n < 1 or n > 15:
raise Exception
raise ScriptsError('Multisig n must be between 1 and 15')
if m < 1 or m > 15:
raise Exception
raise ScriptsError('Multisig m must be between 1 and 15')
w = bytearray()
w.append(0x50 + m) # numbers 1 to 16 are pushed as 0x50 + value