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Code Issues Releases Wiki Activity

core/sign_tx: Move overwintered functionality to separate class.

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This commit is contained in:
Andrew Kozlik 2020-04-07 22:50:03 +02:00 committed by Andrew Kozlik
parent c190eed7fc
commit 50c08274b9
2 changed files with 59 additions and 48 deletions
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2
core/src/apps/wallet/sign_tx/__init__.py
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@ -24,6 +24,8 @@ async def sign_tx(ctx, msg, keychain):
coin = coins.by_name(coin_name)
if not utils.BITCOIN_ONLY and coin.decred:
coinsig = decred.Decred()
elif not utils.BITCOIN_ONLY and coin.overwintered:
coinsig = bitcoinlike.Overwintered()
elif not utils.BITCOIN_ONLY and coin_name not in ("Bitcoin", "Regtest", "Testnet"):
coinsig = bitcoinlike.Bitcoinlike()
else:

105
core/src/apps/wallet/sign_tx/bitcoinlike.py
View File

@ -16,22 +16,6 @@ if False:
class Bitcoinlike(signing.Bitcoin):
def init_hash143(self) -> None:
if self.coin.overwintered:
if self.tx.version == 3:
branch_id = self.tx.branch_id or 0x5BA81B19 # Overwinter
self.hash143 = zcash.Zip143(branch_id) # ZIP-0143 transaction hashing
elif self.tx.version == 4:
branch_id = self.tx.branch_id or 0x76B809BB # Sapling
self.hash143 = zcash.Zip243(branch_id) # ZIP-0243 transaction hashing
else:
raise signing.SigningError(
FailureType.DataError,
"Unsupported version for overwintered transaction",
)
else:
super().init_hash143()
async def phase1_process_segwit_input(self, i: int, txi: TxInputType) -> None:
if not self.coin.segwit:
raise signing.SigningError(
@ -40,7 +24,7 @@ class Bitcoinlike(signing.Bitcoin):
await super().phase1_process_segwit_input(i, txi)
async def phase1_process_nonsegwit_input(self, i: int, txi: TxInputType) -> None:
if self.coin.force_bip143 or self.coin.overwintered:
if self.coin.force_bip143:
await self.phase1_process_bip143_input(i, txi)
else:
await super().phase1_process_nonsegwit_input(i, txi)
@ -55,7 +39,7 @@ class Bitcoinlike(signing.Bitcoin):
self.total_in += txi.amount
async def phase2_sign_nonsegwit_input(self, i_sign: int) -> None:
if self.coin.force_bip143 or self.coin.overwintered:
if self.coin.force_bip143:
await self.phase2_sign_bip143_input(i_sign)
else:
await super().phase2_sign_nonsegwit_input(i_sign)
@ -133,39 +117,15 @@ class Bitcoinlike(signing.Bitcoin):
hashtype |= (self.coin.fork_id << 8) | SIGHASH_FORKID
return hashtype
def write_sign_tx_footer(self, w: writers.Writer) -> None:
super().write_sign_tx_footer(w)
if self.coin.overwintered:
if self.tx.version == 3:
writers.write_uint32(w, self.tx.expiry) # expiryHeight
writers.write_varint(w, 0) # nJoinSplit
elif self.tx.version == 4:
writers.write_uint32(w, self.tx.expiry) # expiryHeight
writers.write_uint64(w, 0) # valueBalance
writers.write_varint(w, 0) # nShieldedSpend
writers.write_varint(w, 0) # nShieldedOutput
writers.write_varint(w, 0) # nJoinSplit
else:
raise signing.SigningError(
FailureType.DataError,
"Unsupported version for overwintered transaction",
)
def write_tx_header(
self, w: writers.Writer, tx: Union[SignTx, TransactionType], has_segwit: bool
) -> None:
if self.coin.overwintered:
# nVersion | fOverwintered
writers.write_uint32(w, tx.version | zcash.OVERWINTERED)
writers.write_uint32(w, tx.version_group_id) # nVersionGroupId
else:
writers.write_uint32(w, tx.version) # nVersion
if self.coin.timestamp:
writers.write_uint32(w, tx.timestamp)
if has_segwit:
writers.write_varint(w, 0x00) # segwit witness marker
writers.write_varint(w, 0x01) # segwit witness flag
writers.write_uint32(w, tx.version) # nVersion
if self.coin.timestamp:
writers.write_uint32(w, tx.timestamp)
if has_segwit:
writers.write_varint(w, 0x00) # segwit witness marker
writers.write_varint(w, 0x01) # segwit witness flag
async def write_prev_tx_footer(
self, w: writers.Writer, tx: TransactionType, prev_hash: bytes
@ -181,3 +141,52 @@ class Bitcoinlike(signing.Bitcoin):
)
writers.write_bytes_unchecked(w, data)
ofs += len(data)
class Overwintered(Bitcoinlike):
def init_hash143(self) -> None:
if self.coin.overwintered:
if self.tx.version == 3:
branch_id = self.tx.branch_id or 0x5BA81B19 # Overwinter
self.hash143 = zcash.Zip143(branch_id) # ZIP-0143 transaction hashing
elif self.tx.version == 4:
branch_id = self.tx.branch_id or 0x76B809BB # Sapling
self.hash143 = zcash.Zip243(branch_id) # ZIP-0243 transaction hashing
else:
raise signing.SigningError(
FailureType.DataError,
"Unsupported version for overwintered transaction",
)
else:
super().init_hash143()
async def phase1_process_nonsegwit_input(self, i: int, txi: TxInputType) -> None:
await self.phase1_process_bip143_input(i, txi)
async def phase2_sign_nonsegwit_input(self, i_sign: int) -> None:
await self.phase2_sign_bip143_input(i_sign)
def write_tx_header(
self, w: writers.Writer, tx: Union[SignTx, TransactionType], has_segwit: bool
) -> None:
# nVersion | fOverwintered
writers.write_uint32(w, tx.version | zcash.OVERWINTERED)
writers.write_uint32(w, tx.version_group_id) # nVersionGroupId
def write_sign_tx_footer(self, w: writers.Writer) -> None:
super().write_sign_tx_footer(w)
if self.tx.version == 3:
writers.write_uint32(w, self.tx.expiry) # expiryHeight
writers.write_varint(w, 0) # nJoinSplit
elif self.tx.version == 4:
writers.write_uint32(w, self.tx.expiry) # expiryHeight
writers.write_uint64(w, 0) # valueBalance
writers.write_varint(w, 0) # nShieldedSpend
writers.write_varint(w, 0) # nShieldedOutput
writers.write_varint(w, 0) # nJoinSplit
else:
raise signing.SigningError(
FailureType.DataError,
"Unsupported version for overwintered transaction",
)