fix(cast): replay Nitro transactions - #15729
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July 14, 2026 12:38
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July 14, 2026 12:45
Decode full blocks through AnyNetwork so Nitro system transactions do not invalidate otherwise standard blocks. Charge Nitro poster gas before EVM execution, recognize Robinhood's chain IDs, and preserve OP transaction envelopes during conversion.
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Reconstruct Tempo AA envelopes decoded through AnyNetwork before converting them to TempoTxEnv. Dispatch replay based on the converted transaction kind so batched calls are not mistaken for creates.
Require matching Nitro receipts and reject missing, malformed, or overflowing poster-gas values. Use checked gas accounting so invalid RPC data cannot silently change replay behavior.
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July 15, 2026 14:28
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yeah @mablr not super happy with this just yet, maybe we can simplify this a bit? |
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Yeah, this is definitely cursed, we already ended up elsewhere with such hacks (eg. forks). We can defer this to foundry 2.0 (close this PR), alloy network/rpc definitely need a rework. |
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cast rundecoded full blocks with the selected Ethereum or OP network type, so Nitro's0x6asystem transaction made otherwise standard Arbitrum and Robinhood blocks fail before replay. This decodes RPC blocks throughAnyNetworkwhile preserving OP envelope bytes during conversion.Nitro charges the L1 poster-gas component before EVM execution and reports it separately in receipts. Local replay previously exposed that gas to the transaction, which could change execution results. The replay now deducts receipt-reported poster gas before execution and adds it back to the displayed total. Robinhood's chain IDs are also recognized for Nitro block-number semantics, and Nitro Cancun blocks may omit the parent beacon root.
Fixes #7514. Closes OSS-556.
This PR was written with Codex, including investigation, code generation, and test generation.