bug: flashblocks builder invalid blocks #533
Description
integration::integration_test::tests::integration_test_chain_produces_blocks failing with flashblocks feature.
The calculated block hash is incorrect. Also 9 flashblocks instead of 10 are produced.
op-rbuilder logs:
�[2m2025-04-02T02:12:20.928427Z�[0m �[32m INFO�[0m Forkchoice updated �[3mhead_block_hash�[0m�[2m=�[0m0xca09608350cc1d42b7fc4d7267941e0de9ad4d8fff074dab49fdcbe2577563c1 �[3msafe_block_hash�[0m�[2m=�[0m0xca09608350cc1d42b7fc4d7267941e0de9ad4d8fff074dab49fdcbe2577563c1 �[3mfinalized_block_hash�[0m�[2m=�[0m0xca09608350cc1d42b7fc4d7267941e0de9ad4d8fff074dab49fdcbe2577563c1
�[2m2025-04-02T02:12:20.928769Z�[0m �[32m INFO�[0m Spawn block building job
�[2m2025-04-02T02:12:20.928819Z�[0m �[32m INFO�[0m New payload job created �[3mid�[0m�[2m=�[0m0x03c0083a12390112 �[3mparent�[0m�[2m=�[0m0xca09608350cc1d42b7fc4d7267941e0de9ad4d8fff074dab49fdcbe2577563c1
�[2m2025-04-02T02:12:20.940376Z�[0m �[32m INFO�[0m Fallback block built
Building flashblock 0x03c0083a12390112 0
�[2m2025-04-02T02:12:20.940435Z�[0m �[32m INFO�[0m Building flashblock 0
Executing best transactions
Building flashblock 0x03c0083a12390112 1
�[2m2025-04-02T02:12:21.154859Z�[0m �[32m INFO�[0m Building flashblock 1
Executing best transactions
Building flashblock 0x03c0083a12390112 2
�[2m2025-04-02T02:12:21.371500Z�[0m �[32m INFO�[0m Building flashblock 2
Executing best transactions
Building flashblock 0x03c0083a12390112 3
�[2m2025-04-02T02:12:21.596757Z�[0m �[32m INFO�[0m Building flashblock 3
Executing best transactions
Building flashblock 0x03c0083a12390112 4
�[2m2025-04-02T02:12:21.824670Z�[0m �[32m INFO�[0m Building flashblock 4
Executing best transactions
Building flashblock 0x03c0083a12390112 5
�[2m2025-04-02T02:12:22.039280Z�[0m �[32m INFO�[0m Building flashblock 5
Executing best transactions
Building flashblock 0x03c0083a12390112 6
�[2m2025-04-02T02:12:22.256735Z�[0m �[32m INFO�[0m Building flashblock 6
Executing best transactions
Building flashblock 0x03c0083a12390112 7
�[2m2025-04-02T02:12:22.481554Z�[0m �[32m INFO�[0m Building flashblock 7
Executing best transactions
Building flashblock 0x03c0083a12390112 8
�[2m2025-04-02T02:12:22.710584Z�[0m �[32m INFO�[0m Building flashblock 8
Executing best transactions
�[2m2025-04-02T02:12:22.932382Z�[0m �[32m INFO�[0m resolving payload job �[3mid�[0m�[2m=�[0m0x03c0083a12390112
�[2m2025-04-02T02:12:22.932490Z�[0m �[32m INFO�[0m Resolve kind Earliest
�[2m2025-04-02T02:12:22.932531Z�[0m �[32m INFO�[0m terminated resolved job �[3mid�[0m�[2m=�[0m0x03c0083a12390112
�[2m2025-04-02T02:12:22.934910Z�[0m �[31mERROR�[0m Invalid payload �[3merror�[0m�[2m=�[0mblock hash mismatch: want 0xe3e0d9a5d0b562be88a729155b9331e8f01d669552bb790e06c07bf5a68160fa, got 0x848193a0b3f77020d3b7ea26669750d42ac9fd1ba2b09a7afb35510036bc09c0