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Add SignedTransaction.hash() to v1 and v2 SDKs #119

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Merged
gregnazario merged 2 commits into from
Jun 18, 2026
Merged

Add SignedTransaction.hash() to v1 and v2 SDKs #119

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2d8d700
Add SignedTransaction.hash() to v1 and v2 SDKs
cursoragent Jun 17, 2026
36887a6
Fix v2 hash test corpus hex string
cursoragent Jun 17, 2026
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20 changes: 20 additions & 0 deletions aptos_sdk/transactions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,8 @@

_RAW_TXN_PREHASH: bytes = hashlib.sha3_256(b"APTOS::RawTransaction").digest()
_RAW_TXN_WITH_DATA_PREHASH: bytes = hashlib.sha3_256(b"APTOS::RawTransactionWithData").digest()
_TRANSACTION_PREHASH: bytes = hashlib.sha3_256(b"APTOS::Transaction").digest()
_USER_TRANSACTION_VARIANT: int = 0


class RawTransactionInternal(Protocol):
Expand Down Expand Up @@ -546,6 +548,13 @@ def bytes(self) -> bytes:
ser.struct(self)
return ser.output()

def hash(self) -> str:
"""Return the committed transaction hash without submitting to the network."""
digest = hashlib.sha3_256(
_TRANSACTION_PREHASH + bytes([_USER_TRANSACTION_VARIANT]) + self.bytes()
).hexdigest()
return f"0x{digest}"

def verify(self) -> bool:
auth = self.authenticator.authenticator
if isinstance(auth, MultiAgentAuthenticator):
Expand Down Expand Up @@ -612,6 +621,17 @@ def test_entry_function(self):
signed_transaction = SignedTransaction(raw_transaction, authenticator)
self.assertTrue(signed_transaction.verify())

def test_signed_transaction_hash(self):
signed_transaction_input = "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"
signed_transaction = SignedTransaction.deserialize(
Deserializer(bytes.fromhex(signed_transaction_input))
)
self.assertEqual(
signed_transaction.hash(),
"0xdb7e0f0b00b817ad8a9d2eae33cf4eec9e25110bac48fa6807000f43128f17ac",
)
self.assertEqual(signed_transaction.hash(), signed_transaction.hash())

def test_entry_function_with_corpus(self):
# Define common inputs
sender_key_input = "9bf49a6a0755f953811fce125f2683d50429c3bb49e074147e0089a52eae155f"
Expand Down
12 changes: 12 additions & 0 deletions aptos_sdk/v2/transactions/signed_transaction.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,8 @@

from __future__ import annotations

import hashlib

from ..bcs import Deserializer, Serializer
from .authenticator import (
AccountAuthenticator,
Expand All @@ -16,6 +18,9 @@
RawTransaction,
)

_TRANSACTION_PREHASH: bytes = hashlib.sha3_256(b"APTOS::Transaction").digest()
_USER_TRANSACTION_VARIANT: int = 0


class SignedTransaction:
"""A signed transaction ready for submission to the Aptos blockchain."""
Expand Down Expand Up @@ -45,6 +50,13 @@ def to_bytes(self) -> bytes:
self.serialize(ser)
return ser.output()

def hash(self) -> str:
"""Return the committed transaction hash without submitting to the network."""
digest = hashlib.sha3_256(
_TRANSACTION_PREHASH + bytes([_USER_TRANSACTION_VARIANT]) + self.to_bytes()
).hexdigest()
return f"0x{digest}"

def verify(self) -> bool:
auth = self.authenticator.authenticator
if isinstance(auth, MultiAgentAuthenticator):
Expand Down
12 changes: 12 additions & 0 deletions v2/src/aptos_sdk_v2/transactions/signed_transaction.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,8 @@

from __future__ import annotations

import hashlib

from ..bcs import Deserializer, Serializer
from .authenticator import (
AccountAuthenticator,
Expand All @@ -16,6 +18,9 @@
RawTransaction,
)

_TRANSACTION_PREHASH: bytes = hashlib.sha3_256(b"APTOS::Transaction").digest()
_USER_TRANSACTION_VARIANT: int = 0


class SignedTransaction:
"""A signed transaction ready for submission to the Aptos blockchain."""
Expand Down Expand Up @@ -45,6 +50,13 @@ def to_bytes(self) -> bytes:
self.serialize(ser)
return ser.output()

def hash(self) -> str:
"""Return the committed transaction hash without submitting to the network."""
digest = hashlib.sha3_256(
_TRANSACTION_PREHASH + bytes([_USER_TRANSACTION_VARIANT]) + self.to_bytes()
).hexdigest()
return f"0x{digest}"

def verify(self) -> bool:
auth = self.authenticator.authenticator
if isinstance(auth, MultiAgentAuthenticator):
Expand Down
8 changes: 8 additions & 0 deletions v2/tests/unit/test_transactions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -314,6 +314,14 @@ def test_transaction_payload_invalid_type(self):


class TestSignedTransactionExtras:
def test_signed_txn_hash(self):
signed_transaction_input = "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"
signed = SignedTransaction.deserialize(
Deserializer(bytes.fromhex(signed_transaction_input))
)
assert signed.hash() == "0xdb7e0f0b00b817ad8a9d2eae33cf4eec9e25110bac48fa6807000f43128f17ac"
assert signed.hash() == signed.hash()

def test_signed_txn_bytes(self):
key = Ed25519PrivateKey.generate()
addr = AuthenticationKey.from_public_key(key.public_key()).account_address()
Expand Down
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