{ "schemaVersion": 1, "wpId": 6028, "checkedAt": "2026-08-31", "purpose": "Pin one completed OP Sepolia and one completed Arbitrum Sepolia canonical L2-to-L1 withdrawal for read-only stage troubleshooting.", "publicTestnetEvidence": true, "readOnly": true, "walletOpened": false, "accountConnected": false, "signatureRequested": false, "proveOrFinalizeCalledByThisFixture": false, "transactionBroadcast": false, "assetMovedByThisFixture": false, "privateKeyPresent": false, "seedPhrasePresent": false, "participantBalanceQueried": false, "cases": { "opSepoliaWithdrawal": { "protocol": "OP Stack Fault Proof withdrawal", "route": "OP Sepolia to Ethereum Sepolia", "direction": "L2-to-L1 canonical ETH withdrawal", "asset": { "kind": "public testnet ETH", "sourceToken": "native ETH on OP Sepolia", "destinationToken": "native ETH on Ethereum Sepolia", "amountWei": "1000000000000000000", "recipient": "0x6e9497fad34b9c554a7926989051b20d681abce2", "recipientBalanceQueried": false }, "contracts": { "l2StandardBridge": "0x4200000000000000000000000000000000000010", "l2StandardBridgeVersionObservedAtCheck": "1.13.2", "l2CrossDomainMessenger": "0x4200000000000000000000000000000000000007", "l2ToL1MessagePasser": "0x4200000000000000000000000000000000000016", "optimismPortal": "0x16fc5058f25648194471939df75cf27a2fdc48bc", "optimismPortalVersionObservedAtCheck": "5.6.1", "optimismPortalImplementationObservedAtCheck": "0xe89f13c5ee4033b2d3cd76c9d6958efbfe26d3c2", "l1CrossDomainMessenger": "0x58cc85b8d04ea49cc6dbd3cbffd00b4b8d6cb3ef", "l1StandardBridge": "0xfbb0621e0b23b5478b630bd55a5f21f67730b0f1" }, "initiation": { "chain": "op-sepolia", "chainId": 11155420, "transactionHash": "0x52a807d5bf5d216627e73e77abf0fb5c9cced1cea535a347b76f11bb6a505854", "blockNumber": 47798324, "blockHash": "0x718be0864b65d72e984786f18cc3d3345975ba41dc240a85b15f41559d4d824c", "timestamp": 1787399188, "timestampIso": "2026-08-22T11:46:28.000Z", "receiptStatus": "success", "calledContract": "0x4200000000000000000000000000000000000010", "function": "bridgeETHTo(address,uint32,bytes)", "functionSelector": "0xe11013dd", "participant": "0x6e9497fad34b9c554a7926989051b20d681abce2", "event": { "name": "MessagePassed", "contract": "0x4200000000000000000000000000000000000016", "topic0": "0x02a52367d10742d8032712c1bb8e0144ff1ec5ffda1ed7d70bb05a2744955054", "logIndex": 5 }, "explorer": "https://testnet-explorer.optimism.io/tx/0x52a807d5bf5d216627e73e77abf0fb5c9cced1cea535a347b76f11bb6a505854" }, "message": { "identifierType": "OP withdrawal hash", "withdrawalHash": "0x02e37383d968ff7066a60970e6f6c961f530525d5afcafdf90745d1d9ef2a995", "calculation": { "nonce": "1766847064778384329583297500742918515827483896875618958121606201292645832", "sender": "0x4200000000000000000000000000000000000007", "target": "0x58cc85b8d04ea49cc6dbd3cbffd00b4b8d6cb3ef", "valueWei": "1000000000000000000", "gasLimit": "516470", "dataBytes": 452, "dataKeccak256": "0x7b8a5f7cf9e7698bb3c8fc08f83750052a3dc5acaeafa913bbaa41d2dc8e8dac", "algorithm": "keccak256(abi.encode(nonce, sender, target, value, gasLimit, data))" } }, "outputAndGame": { "disputeGameIndex": 84080, "disputeGameProxy": "0x44d8f0fa0ca747e4d09553137fe9133e5ed9ed6f", "gameType": 8, "gameStatus": 2, "gameStatusLabel": "DEFENDER_WINS", "l2BlockNumber": 47798414, "l2BlockHash": "0x44985eb64de0034feebba1e8cffc6b1143c72745822a0b7b9cef0b50414d36b8", "gameCreatedAt": 1787399472, "gameCreatedAtIso": "2026-08-22T11:51:12.000Z", "gameResolvedAt": 1787701944, "gameResolvedAtIso": "2026-08-25T23:52:24.000Z", "proofMaturityDelaySecondsObservedAtCheck": 604800, "disputeGameFinalityDelaySecondsObservedAtCheck": 302400, "respectedGameTypeObservedAtCheck": 8, "timingGuarantee": false }, "proof": { "chain": "ethereum-sepolia", "chainId": 11155111, "transactionHash": "0xeec016ee03119db5c20968c19af3ec1bf3cd3559f8271eea8beb1f21a047c93c", "blockNumber": 11549033, "blockHash": "0xb5637de82c51dd117f364636f1880c55031586dd45ed2b0a50d31bdd8867cc5e", "timestamp": 1787475900, "timestampIso": "2026-08-23T09:05:00.000Z", "receiptStatus": "success", "proofSubmitter": "0x6e9497fad34b9c554a7926989051b20d681abce2", "event": { "name": "WithdrawalProven", "topic0": "0x67a6208cfcc0801d50f6cbe764733f4fddf66ac0b04442061a8a8c0cb6b63f62", "logIndex": 52, "withdrawalHash": "0x02e37383d968ff7066a60970e6f6c961f530525d5afcafdf90745d1d9ef2a995" }, "extensionEvent": { "name": "WithdrawalProvenExtension1", "topic0": "0x798f9f13695f8f045aa5f80ed8efebb695f3c7fe65da381969f2f28bf3c60b97", "logIndex": 53 }, "explorer": "https://sepolia.etherscan.io/tx/0xeec016ee03119db5c20968c19af3ec1bf3cd3559f8271eea8beb1f21a047c93c" }, "finalization": { "chain": "ethereum-sepolia", "chainId": 11155111, "transactionHash": "0x87f46225c4e1f39d44bea381c7dbd6f172adcdf1e6be0afac2e8528fceb2c00a", "blockNumber": 11598122, "blockHash": "0x502087a9ed75102dd1956e24b27ac1f0bf814ce4ff3bd7111cf9d98b57afd01d", "timestamp": 1788084372, "timestampIso": "2026-08-30T10:06:12.000Z", "receiptStatus": "success", "finalizedWithdrawals": true, "event": { "name": "WithdrawalFinalized", "topic0": "0xdb5c7652857aa163daadd670e116628fb42e869d8ac4251ef8971d9e5727df1b", "logIndex": 117, "withdrawalHash": "0x02e37383d968ff7066a60970e6f6c961f530525d5afcafdf90745d1d9ef2a995", "success": true }, "explorer": "https://sepolia.etherscan.io/tx/0x87f46225c4e1f39d44bea381c7dbd6f172adcdf1e6be0afac2e8528fceb2c00a" }, "observation": { "initiationToProofSeconds": 76712, "initiationToProofDisplay": "21h 18m 32s", "proofToFinalizationSeconds": 608472, "proofToFinalizationDisplay": "7d 1h 1m 12s", "initiationToFinalizationSeconds": 685184, "initiationToFinalizationDisplay": "7d 22h 19m 44s", "timingGuarantee": false } }, "arbitrumSepoliaWithdrawal": { "protocol": "Arbitrum Nitro / BoLD withdrawal", "route": "Arbitrum Sepolia to Ethereum Sepolia", "direction": "child-to-parent canonical ETH withdrawal", "asset": { "kind": "public testnet ETH", "sourceToken": "native ETH on Arbitrum Sepolia", "destinationToken": "native ETH on Ethereum Sepolia", "amountWei": "500000000000000000", "recipient": "0xce237e196f51a644bf397ca521e13ec496113276", "recipientBalanceQueried": false }, "contracts": { "arbSys": "0x0000000000000000000000000000000000000064", "rollup": "0xd80810638dbdf9081b72c1b33c65375e807281c8", "bridge": "0x38f918d0e9f1b721edaa41302e399fa1b79333a9", "outbox": "0x65f07c7d521164a4d5dac6eb8fac8da067a3b78f", "outboxImplementationObservedAtCheck": "0xfed2027e956fa0a1f367c03a20555839441e224f", "networkConfigSourceCommit": "92d3960f252ceaf33f8ebb35c402a9b2c4b88a5d" }, "initiation": { "chain": "arbitrum-sepolia", "chainId": 421614, "transactionHash": "0x559f5a93a53f8e850c920f0653fcfe3ece22fef112bb69ef0056523d81a7ab13", "blockNumber": 303468608, "blockHash": "0x2167eb7abc6b84b60235e643f874beb007e3557f8995d4f68fe0dbd7d8f4dfca", "timestamp": 1788061452, "timestampIso": "2026-08-30T03:44:12.000Z", "receiptStatus": "success", "event": { "name": "L2ToL1Tx", "topic0": "0x3e7aafa77dbf186b7fd488006beff893744caa3c4f6f299e8a709fa2087374fc", "logIndex": 9, "caller": "0xce237e196f51a644bf397ca521e13ec496113276", "destination": "0xce237e196f51a644bf397ca521e13ec496113276", "eventHash": "0xcdd0fe422734e3886eb9a435c9aac9d27580c5a11e95329ab6f1dc0b03d00f8b", "position": 117694 }, "explorer": "https://sepolia.arbiscan.io/tx/0x559f5a93a53f8e850c920f0653fcfe3ece22fef112bb69ef0056523d81a7ab13" }, "assertionAndChallenge": { "sdkStatuses": [ "UNCONFIRMED", "CONFIRMED", "EXECUTED" ], "position": 117694, "confirmPeriodBlocks": 20, "confirmPeriodUnit": "Ethereum Sepolia parent-chain blocks", "claimableStatus": "CONFIRMED", "executionIsSeparate": true, "timingGuarantee": false }, "execution": { "chain": "ethereum-sepolia", "chainId": 11155111, "transactionHash": "0x54cce03b6d3a4fd723f19ce7d70c802741aca1c6a9a6101b37da059ab71571e8", "blockNumber": 11598850, "blockHash": "0x3da82563844bd90328399ff8e978b0b74d0f30504644124d477ba31e49ff4c90", "timestamp": 1788093288, "timestampIso": "2026-08-30T12:34:48.000Z", "receiptStatus": "success", "outboxIsSpent": true, "event": { "name": "OutBoxTransactionExecuted", "topic0": "0x20af7f3bbfe38132b8900ae295cd9c8d1914be7052d061a511f3f728dab18964", "logIndex": 23, "caller": "0xce237e196f51a644bf397ca521e13ec496113276", "destination": "0xce237e196f51a644bf397ca521e13ec496113276", "position": 117694 }, "explorer": "https://sepolia.etherscan.io/tx/0x54cce03b6d3a4fd723f19ce7d70c802741aca1c6a9a6101b37da059ab71571e8" }, "observation": { "initiationToExecutionSeconds": 31836, "initiationToExecutionDisplay": "8h 50m 36s", "timingGuarantee": false } } }, "readOnlyRpcMethods": [ "eth_chainId", "eth_getTransactionReceipt", "eth_getBlockByHash", "eth_call", "eth_getStorageAt" ], "officialSources": [ { "label": "OP Stack withdrawal flow", "url": "https://docs.optimism.io/op-stack/bridging/withdrawal-flow", "checkedAt": "2026-08-31" }, { "label": "OP Stack withdrawal specification", "url": "https://github.com/ethereum-optimism/specs/blob/1d871bd4164b24295ebedf3929d93d62371b5e8e/specs/protocol/withdrawals.md", "sourceCommit": "1d871bd4164b24295ebedf3929d93d62371b5e8e" }, { "label": "OP Stack stage-one OptimismPortal specification", "url": "https://github.com/ethereum-optimism/specs/blob/9e5fde2d282a27cac4b50a664fc0f85e14184753/specs/fault-proof/stage-one/optimism-portal.md", "sourceCommit": "9e5fde2d282a27cac4b50a664fc0f85e14184753" }, { "label": "OP Sepolia Superchain Registry configuration", "url": "https://github.com/ethereum-optimism/superchain-registry/blob/3d974558a971cf997bb54a80eb39b92e1f48fb1b/superchain/configs/sepolia/op.toml", "sourceCommit": "3d974558a971cf997bb54a80eb39b92e1f48fb1b" }, { "label": "Arbitrum bridge transaction traceability", "url": "https://github.com/OffchainLabs/arbitrum-docs/blob/69afcbfa42d864ccedd6bf9ca3a13530fcb8cd32/docs/arbitrum-bridge/05-bridge-transaction-traceability.mdx", "sourceCommit": "69afcbfa42d864ccedd6bf9ca3a13530fcb8cd32" }, { "label": "Arbitrum withdrawal monitoring", "url": "https://github.com/OffchainLabs/arbitrum-docs/blob/50667f498ffcc261917f38bf6e9d52902bb8d8df/docs/arbitrum-bridge/06-withdrawal-monitoring.mdx", "sourceCommit": "50667f498ffcc261917f38bf6e9d52902bb8d8df" }, { "label": "Arbitrum Sepolia network configuration", "url": "https://github.com/OffchainLabs/arbitrum-sdk/blob/92d3960f252ceaf33f8ebb35c402a9b2c4b88a5d/packages/sdk/src/lib/dataEntities/networks.ts", "sourceCommit": "92d3960f252ceaf33f8ebb35c402a9b2c4b88a5d" } ], "limitations": [ "Both cases are historical public testnet observations, not mainnet status, average duration, a service-level objective, or an arrival guarantee.", "OP Stack and Arbitrum use different proof, assertion, challenge, and execution state machines; similarly named UI phases are not interchangeable.", "The OP example used the canonical Standard Bridge contracts even though its optional extraData identifies a frontend; contract route, not a frontend label, defines this evidence.", "The fixture records public testnet participant addresses only to bind events and never queries balances, identity, wallet state, or personal information.", "This fixture never connects a wallet, signs, proves, finalizes, executes, claims, approves, broadcasts, or moves an asset." ] }