[KGA-32] [KGA-143] [KGA-86] [KGA-88]fix: last 10 blockhash are 0

[obatirou]

code-423n4/2024-09-kakarot-findings#5

What is the new behavior?

Last 10 blocks returns 0 for blockhash

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This change is 

[notion-workspace]

Invalid range check for block_number arg causes unhandled cairo tx panics

[notion-workspace]

BLOCKHASH Opcode does not comply with Kakarot spec

[notion-workspace]

Blockhash revert issue in last 10 blocks

[notion-workspace]

Opcode BLOCKHASH for last 10 block numbers make starkent transaction revert

[enitrat]

can you check why this is still marked as xfail?

    class TestBlockhash:
        @pytest.mark.xfail(reason="Need to fix blockhash on real Starknet network")
        async def test_should_return_blockhash_with_valid_block_number(
            self, plain_opcodes, block_number, block_hash
        ):
            blockhash = await plain_opcodes.opcodeBlockHash(
                await block_number("latest")
            )

            assert int.from_bytes(blockhash, byteorder="big") == await block_hash()