test_bal_callcode_nested_value_transfer()

Documentation for tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists.py::test_bal_callcode_nested_value_transfer@892e6d1e.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists.py::test_bal_callcode_nested_value_transfer --fork Amsterdam

Ensure BAL captures balance changes from nested value transfers when CALLCODE executes target code that itself makes CALL with value.

Source code in tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists.py

def test_bal_callcode_nested_value_transfer(
    pre: Alloc,
    blockchain_test: BlockchainTestFiller,
) -> None:
    """
    Ensure BAL captures balance changes from nested value transfers
    when CALLCODE executes target code that itself makes CALL with value.
    """
    alice = pre.fund_eoa()
    bob = pre.fund_eoa(amount=0)

    # TargetContract sends 100 wei to bob
    target_code = Op.CALL(0, bob, 100, 0, 0, 0, 0)
    target_contract = pre.deploy_contract(code=target_code)

    # Oracle contract that uses CALLCODE to execute TargetContract's code
    oracle_code = Op.CALLCODE(50_000, target_contract, 100, 0, 0, 0, 0)
    oracle_contract = pre.deploy_contract(code=oracle_code, balance=200)

    tx = Transaction(
        sender=alice, to=oracle_contract, gas_limit=1_000_000, gas_price=0xA
    )

    block = Block(
        txs=[tx],
        expected_block_access_list=BlockAccessListExpectation(
            account_expectations={
                alice: BalAccountExpectation(
                    nonce_changes=[
                        BalNonceChange(block_access_index=1, post_nonce=1)
                    ],
                ),
                oracle_contract: BalAccountExpectation(
                    balance_changes=[
                        BalBalanceChange(
                            block_access_index=1, post_balance=100
                        )
                    ],
                ),
                bob: BalAccountExpectation(
                    balance_changes=[
                        BalBalanceChange(
                            block_access_index=1, post_balance=100
                        )
                    ],
                ),
                target_contract: BalAccountExpectation.empty(),
            }
        ),
    )

    blockchain_test(pre=pre, blocks=[block], post={})

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.