test_block_hashes_call_opcodes()

Documentation for tests/prague/eip2935_historical_block_hashes_from_state/test_block_hashes.py::test_block_hashes_call_opcodes@892e6d1e.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/prague/eip2935_historical_block_hashes_from_state/test_block_hashes.py::test_block_hashes_call_opcodes --fork Amsterdam

Test that the call opcodes can be used to call the history contract and get the block hashes.

Source code in tests/prague/eip2935_historical_block_hashes_from_state/test_block_hashes.py

@pytest.mark.valid_from("Prague")
@pytest.mark.with_all_call_opcodes
def test_block_hashes_call_opcodes(
    blockchain_test: BlockchainTestFiller, pre: Alloc, call_opcode: Op
) -> None:
    """
    Test that the call opcodes can be used to call the history contract and get
    the block hashes.
    """
    blocks = []
    blocks.append(Block())

    storage = Storage()
    return_code_slot = storage.store_next(0x1)
    blockhash_value_slot = storage.store_next(
        True if call_opcode in [Op.DELEGATECALL, Op.CALLCODE] else False
    )

    code = (
        Op.MSTORE(0, 1)
        + Op.SSTORE(
            return_code_slot,
            call_opcode(
                address=Spec.HISTORY_STORAGE_ADDRESS,
                args_offset=0,
                args_size=32,
                ret_offset=32,
                ret_size=32,
            ),
        )
        + Op.SSTORE(blockhash_value_slot, Op.ISZERO(Op.MLOAD(32)))
    )

    contract_address = pre.deploy_contract(code, storage=storage.canary())
    blocks.append(
        Block(
            txs=[
                Transaction(
                    to=contract_address,
                    gas_limit=10_000_000,
                    sender=pre.fund_eoa(),
                )
            ]
        )
    )
    blockchain_test(
        pre=pre,
        blocks=blocks,
        post={contract_address: Account(storage=storage)},
    )

Parametrized Test Cases

This test generates 4 parametrized test cases across 3 forks.