test_bal_block_rewards()

Documentation for tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists.py::test_bal_block_rewards@20373115.

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_block_rewards --fork Amsterdam

Ensure BAL captures fee recipient balance changes from block rewards.

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

def test_bal_block_rewards(
    pre: Alloc,
    blockchain_test: BlockchainTestFiller,
    fork: Fork,
) -> None:
    """Ensure BAL captures fee recipient balance changes from block rewards."""
    alice_initial_balance = 1_000_000
    alice = pre.fund_eoa(amount=alice_initial_balance)
    bob = pre.fund_eoa(amount=0)
    charlie = pre.fund_eoa(amount=0)  # fee recipient

    intrinsic_gas_calculator = fork.transaction_intrinsic_cost_calculator()
    intrinsic_gas = intrinsic_gas_calculator(
        calldata=b"",
        contract_creation=False,
        access_list=[],
    )
    tx_gas_limit = intrinsic_gas + 1000  # add a small buffer
    gas_price = 0xA

    tx = Transaction(
        sender=alice,
        to=bob,
        value=100,
        gas_limit=tx_gas_limit,
        gas_price=gas_price,
    )

    # EIP-1559 fee calculation:
    # - Total gas cost
    total_gas_cost = intrinsic_gas * gas_price
    # - Tip portion

    genesis_env = Environment(base_fee_per_gas=0x7)
    base_fee_per_gas = fork.base_fee_per_gas_calculator()(
        parent_base_fee_per_gas=int(genesis_env.base_fee_per_gas or 0),
        parent_gas_used=0,
        parent_gas_limit=genesis_env.gas_limit,
    )
    tip_to_charlie = (gas_price - base_fee_per_gas) * intrinsic_gas

    alice_final_balance = alice_initial_balance - 100 - total_gas_cost

    block = Block(
        txs=[tx],
        fee_recipient=charlie,  # Set Charlie as the fee recipient
        header_verify=Header(base_fee_per_gas=base_fee_per_gas),
        expected_block_access_list=BlockAccessListExpectation(
            account_expectations={
                alice: BalAccountExpectation(
                    nonce_changes=[
                        BalNonceChange(block_access_index=1, post_nonce=1)
                    ],
                    balance_changes=[
                        BalBalanceChange(
                            block_access_index=1,
                            post_balance=alice_final_balance,
                        )
                    ],
                ),
                bob: BalAccountExpectation(
                    balance_changes=[
                        BalBalanceChange(
                            block_access_index=1, post_balance=100
                        )
                    ],
                ),
                charlie: BalAccountExpectation(
                    balance_changes=[
                        BalBalanceChange(
                            block_access_index=1, post_balance=tip_to_charlie
                        )
                    ],
                ),
            }
        ),
    )

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

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.