/
signers.py
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/
signers.py
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from typing import Tuple
from starkware.starknet.core.os.transaction_hash.transaction_hash import TransactionHashPrefix
from starkware.starknet.core.os.contract_address.contract_address import (
calculate_contract_address_from_hash,
)
from starkware.starknet.definitions.general_config import StarknetChainId
from starkware.starknet.services.api.gateway.transaction import InvokeFunction, DeployAccount
from starkware.starknet.business_logic.transaction.objects import InternalTransaction, InternalDeclare, TransactionExecutionInfo
from nile.signer import Signer, from_call_to_call_array, get_transaction_hash, TRANSACTION_VERSION
from nile.utils import to_uint
from utils import get_class_hash, get_contract_class
import eth_keys
class BaseSigner():
async def send_transaction(self, account, to, selector_name, calldata, nonce=None, max_fee=0):
return await self.send_transactions(account, [(to, selector_name, calldata)], nonce, max_fee)
async def send_transactions(
self,
account,
calls,
nonce=None,
max_fee=0
) -> TransactionExecutionInfo:
raw_invocation = get_raw_invoke(account, calls)
state = raw_invocation.state
if nonce is None:
nonce = await state.state.get_nonce_at(account.contract_address)
transaction_hash = get_transaction_hash(
prefix=TransactionHashPrefix.INVOKE,
account=account.contract_address,
calldata=raw_invocation.calldata,
version=TRANSACTION_VERSION,
chain_id=StarknetChainId.TESTNET.value,
nonce=nonce,
max_fee=max_fee,
)
signature = self.sign(transaction_hash)
external_tx = InvokeFunction(
contract_address=account.contract_address,
calldata=raw_invocation.calldata,
entry_point_selector=None,
signature=signature,
max_fee=max_fee,
version=TRANSACTION_VERSION,
nonce=nonce,
)
tx = InternalTransaction.from_external(
external_tx=external_tx, general_config=state.general_config
)
execution_info = await state.execute_tx(tx=tx)
return execution_info
async def declare_class(
self,
account,
contract_name,
nonce=None,
max_fee=0,
) -> Tuple[int, TransactionExecutionInfo]:
state = account.state
if nonce is None:
nonce = await state.state.get_nonce_at(contract_address=account.contract_address)
contract_class = get_contract_class(contract_name)
class_hash = get_class_hash(contract_name)
transaction_hash = get_transaction_hash(
prefix=TransactionHashPrefix.DECLARE,
account=account.contract_address,
calldata=[class_hash],
nonce=nonce,
version=TRANSACTION_VERSION,
max_fee=max_fee,
chain_id=StarknetChainId.TESTNET.value
)
signature = self.sign(transaction_hash)
tx = InternalDeclare.create(
sender_address=account.contract_address,
contract_class=contract_class,
chain_id=StarknetChainId.TESTNET.value,
max_fee=max_fee,
version=TRANSACTION_VERSION,
nonce=nonce,
signature=signature,
)
execution_info = await state.execute_tx(tx=tx)
await state.state.set_contract_class(
class_hash=tx.class_hash,
contract_class=contract_class
)
return class_hash, execution_info
async def deploy_account(
self,
state,
calldata,
salt=0,
nonce=0,
max_fee=0,
) -> TransactionExecutionInfo:
account_address = calculate_contract_address_from_hash(
salt=salt,
class_hash=self.class_hash,
constructor_calldata=calldata,
deployer_address=0
)
transaction_hash = get_transaction_hash(
prefix=TransactionHashPrefix.DEPLOY_ACCOUNT,
account=account_address,
calldata=[self.class_hash, salt, *calldata],
nonce=nonce,
version=TRANSACTION_VERSION,
max_fee=max_fee,
chain_id=StarknetChainId.TESTNET.value
)
signature = self.sign(transaction_hash)
external_tx = DeployAccount(
class_hash=self.class_hash,
contract_address_salt=salt,
constructor_calldata=calldata,
signature=signature,
max_fee=max_fee,
version=TRANSACTION_VERSION,
nonce=nonce,
)
tx = InternalTransaction.from_external(
external_tx=external_tx, general_config=state.general_config
)
execution_info = await state.execute_tx(tx=tx)
return execution_info
class MockSigner(BaseSigner):
"""
Utility for sending signed transactions to an Account on Starknet.
Parameters
----------
private_key : int
Examples
---------
Constructing a MockSigner object
>>> signer = MockSigner(1234)
Sending a transaction
>>> await signer.send_transaction(
account, contract_address, 'contract_method', [arg_1]
)
Sending multiple transactions
>>> await signer.send_transactions(
account, [
(contract_address, 'contract_method', [arg_1]),
(contract_address, 'another_method', [arg_1, arg_2])
]
)
"""
def __init__(self, private_key):
self.signer = Signer(private_key)
self.public_key = self.signer.public_key
self.class_hash = get_class_hash("Account")
def sign(self, transaction_hash):
sig_r, sig_s = self.signer.sign(transaction_hash)
return [sig_r, sig_s]
class MockEthSigner(BaseSigner):
"""
Utility for sending signed transactions to an Account on Starknet, like MockSigner, but using a secp256k1 signature.
Parameters
----------
private_key : int
"""
def __init__(self, private_key):
self.signer = eth_keys.keys.PrivateKey(private_key)
self.eth_address = int(self.signer.public_key.to_checksum_address(), 0)
self.class_hash = get_class_hash("EthAccount")
def sign(self, transaction_hash):
signature = self.signer.sign_msg_hash(
(transaction_hash).to_bytes(32, byteorder="big"))
sig_r = to_uint(signature.r)
sig_s = to_uint(signature.s)
return [signature.v, *sig_r, *sig_s]
def get_raw_invoke(sender, calls):
"""Return raw invoke, remove when test framework supports `invoke`."""
call_array, calldata = from_call_to_call_array(calls)
raw_invocation = sender.__execute__(call_array, calldata)
return raw_invocation