{
"self": {
"stateValidation": {
"value": "Fraud proofs (INT)",
"description": "Fraud proofs only allow 2 WHITELISTED actors watching the chain to prove that the state is incorrect. Interactive proofs (INT) require multiple transactions over time to resolve. The challenge protocol can be subject to delay attacks. There is a 6d 8h challenge period.",
"executionDelay": 172800,
"executionDelayMode": "if-challenged",
"challengeDelay": 549816,
"permissioned": true,
"defenderAdvantage": "not-applicable",
"sentiment": "bad",
"orderHint": 2,
"initialBond": {
"value": "1.0"
},
"secondLine": "6d 8h challenge period\n+ 2d execution delay"
},
"dataAvailability": {
"value": "Onchain",
"description": "All of the data needed for proof construction is published on Ethereum L1.",
"sentiment": "good",
"orderHint": null
},
"exitWindow": {
"value": "None",
"description": "There is no window for users to exit in case of an unwanted upgrade since contracts are instantly upgradable.",
"sentiment": "bad",
"orderHint": -345600
},
"sequencerFailure": {
"value": "Self sequence",
"description": "In the event of a sequencer failure, users can force transactions to be included in the project's chain by sending them to L1. There can be up to a 4d delay on this operation.",
"sentiment": "good",
"orderHint": 345600,
"secondLine": "4d delay"
"value": "No mechanism",
"description": "There is no guaranteed mechanism to have transactions included if the sequencer is down or censoring. Although users can enqueue messages in the L1 delayed inbox and call forceInclusion on the SequencerInbox, the chain runs ArbOS 61 transaction filtering: an authorized filterer can register any transaction hash in the ArbFilteredTransactionsManager precompile (0x00…0074), after which the state transition function forcibly fails that transaction, including force-included ones, without delay.",
"sentiment": "bad"
},
"proposerFailure": {
"value": "Self propose",
"description": "Anyone can become a Proposer after 28d of inactivity from the currently whitelisted Proposers.",
"sentiment": "good",
"orderHint": 2419200,
"secondLine": "28d delay"
}
}
}
scalingTechnology+10-5
{
"architectureImage": "orbit-rollup",
"dataAvailability": [
{
"name": "All data required for proofs is published on chain",
"description": "All the data that is used to construct the system state is published on chain in the form of cheap blobs or calldata. This ensures that it will be available for enough time.",
"risks": [],
"references": [
{
"title": "Sequencing followed by deterministic execution - Arbitrum documentation",
"url": "https://developer.offchainlabs.com/inside-arbitrum-nitro/#sequencing-followed-by-deterministic-execution"
},
{
"title": "SequencerInbox.sol - source code, addSequencerL2BatchFromOrigin function",
"url": "https://etherscan.io/address/0xb015D78fb9B890e96FD3E23819b2C8D9fffA3cC5#code"
}
]
}
],
"exitMechanisms": [
{
"name": "Regular messaging",
"description": "The user initiates L2->L1 messages by submitting a regular transaction on this chain. When the block containing that transaction is settled, the message becomes available for processing on L1. The process of block finalization usually takes several days to complete.",
"risks": [],
"references": [
{
"title": "Transaction lifecycle - Arbitrum documentation",
"url": "https://developer.offchainlabs.com/tx-lifecycle"
},
{
"title": "L2 to L1 Messages - Arbitrum documentation",
"url": "https://docs.arbitrum.io/how-arbitrum-works/deep-dives/l2-to-l1-messaging"
},
{
"title": "Mainnet for everyone - Arbitrum Blog",
"url": "https://offchain.medium.com/mainnet-for-everyone-27ce0f67c85e"
}
]
},
{
"name": "Autonomous exit",
"description": "Users can (eventually) exit the system by pushing the transaction on L1 and providing the corresponding state root. The only way to prevent such withdrawal is via an upgrade.",
"risks": [],
"references": []
}
],
"forceTransactions": {
"name": "Users can force any transaction",
"description": "Because the state of the system is based on transactions submitted on the underlying host chain and anyone can submit their transactions there it allows the users to circumvent censorship by interacting with the smart contract on the host chain directly. After a delay of 4d in which a Sequencer has failed to include a transaction that was directly posted to the smart contract, it can be forcefully included by anyone on the host chain, which finalizes its ordering.",
"risks": [],
"name": "Force inclusion can be nullified by transaction filtering",
"description": "Users can enqueue messages in the L1 delayed inbox and, after the sequencing delay, call forceInclusion on the SequencerInbox to include them. However, the chain runs ArbOS 61 transaction filtering: an authorized filterer can register any transaction hash in the ArbFilteredTransactionsManager precompile (0x00…0074), after which the state transition function forcibly fails that transaction, including one force-included via L1, without delay. Force inclusion is therefore not a reliable censorship escape hatch.",
"risks": [
{
"category": "Users can be censored if",
"text": "the operator registers their transaction hash in the ArbFilteredTransactionsManager precompile, causing the state transition function to fail it even when it is force-included via the L1 delayed inbox."
}
],
"references": [
{
"title": "SequencerInbox.sol - source code, forceInclusion function",
"url": "https://etherscan.io/address/0xb015D78fb9B890e96FD3E23819b2C8D9fffA3cC5#code"
"title": "Transaction screening - Robinhood Chain documentation",
"url": "https://docs.robinhood.com/chain/differences-from-ethereum/#transaction-screening"
},
{
"title": "Sequencer Isn't Doing Its Job - Arbitrum documentation",
"url": "https://docs.arbitrum.io/how-arbitrum-works/sequencer#unhappyuncommon-case-sequencer-isnt-doing-its-job"
}
]
},
"operator": {
"name": "The system has a centralized sequencer",
"description": "While forcing transaction is open to anyone the system employs a privileged sequencer that has priority for submitting transaction batches and ordering transactions.",
"risks": [
{
"category": "MEV can be extracted if",
"text": "the operator exploits their centralized position and frontruns user transactions."
}
],
"references": [
{
"title": "Sequencer - Arbitrum documentation",
"url": "https://docs.arbitrum.io/how-arbitrum-works/inside-arbitrum-nitro#the-sequencer"
}
]
},
"otherConsiderations": [
{
"name": "EVM compatible smart contracts are supported",
"description": "Arbitrum One uses Nitro technology that allows running fraud proofs by executing EVM code on top of WASM.",
"risks": [],
"references": [
{
"title": "Inside Arbitrum Nitro",
"url": "https://developer.offchainlabs.com/inside-arbitrum-nitro/"
}
]
}
],
"sequencing": {
"name": "Buffered forced transactions",
"description": "To force transactions from the host chain, users must first enqueue \"delayed\" messages in the \"delayed\" inbox of the Bridge contract. Only authorized Inboxes are allowed to enqueue delayed messages, and the so-called Inbox contract is the one used as the entry point by calling the `sendMessage` or `sendMessageFromOrigin` functions. If the centralized sequencer doesn't process the request within some time bound, users can call the `forceInclusion` function on the SequencerInbox contract to include the message in the canonical chain. The time bound is defined to be the minimum between 4d and the time left in the delay buffer. The delay buffer gets replenished over time and gets consumed every time the sequencer doesn't timely process a message. Only messages processed with a delay greater than 1634y 3mo consume the buffer. The buffer is capped at 1634y 3mo. The replenish rate is currently set at 1m every 20m. Even if the buffer is fully consumed, messages are still allowed to be delayed up to 1634y 3mo.",
"references": [
{
"title": "Sequencer and censorship resistance - Arbitrum documentation",
"url": "https://docs.arbitrum.io/how-arbitrum-works/sequencer"
}
],
"risks": []
},
"stateValidation": {
"description": "Updates to the system state can be proposed and challenged by a set of whitelisted validators. If a state root passes the challenge period, it is optimistically considered correct and made actionable for withdrawals.",
"categories": [
{
"title": "State root proposals",
"description": "Validators propose state roots as children of a previous state root. A state root can have multiple conflicting children. State roots are referred to as \"assertions\" within the contracts. Each chain of assertions only requires one stake, and validators staked on assertions with a child are considered inactive and can either move their stake to a new node or withdraw it. The function used to propose a new assertion is the `stakeOnNewAssertion` function. The stake is currently set to 1.0 ETH, and it can be slashed if the proposal is proven incorrect via a fraud proof. The protocol allows such funds to be trustlessly pooled together if necessary. New nodes cannot be created faster than the minimum assertion period, currently set to 15m. An assertion without \"rivals\" can be confirmed after the challenge period has passed, currently set to 6d 8h. If a rival is present, then it is checked that the assertion is the winner in the challenge protocol.",
"risks": [
{
"category": "Funds can be stolen if",
"text": "no whitelisted challenger disputes an invalid state root before the challenge window expires.",
"isCritical": true
}
],
"references": [
{
"title": "BoLD paper",
"url": "https://arxiv.org/pdf/2404.10491"
}
]
},
{
"title": "Challenges",
"description": "A challenge can be started between two siblings, i.e. two different state roots that share the same parent, by calling the `createLayerZeroEdge` function in the `ChallengeManager` contract. Edges represent assertions, or bisected assertions, within the challenge protocol. Challenges are played via a bisection game, where asserters and challengers play together to find the first instruction of disagreement. Such instruction is then executed onchain in the WASM OneStepProver contract to determine the winner. An edge can only be bisected when rivaled. The bisection process requires no new stake as their validity is checked against a parent \"history root\" that contains all intermediate states. An edge can also be confirmed if itself or its descendants spend enough time being unrivaled. Such time is set to 6d 8h. If both actors play as slow as possible, the maximum time to confirm an edge is double such value, i.e. 12d 17h. Due to the complexities of maintaining the history root, the challenge protocol is divided into 3 levels, where the lowest level represents assertions over blocks, the highest level represents assertions over single WASM instructions, and intermediate levels represent assertions over chunks of WASM instructions. When moving between levels, a new stake is required. Level 0 (block level) requires a stake of 0.0 ETH, level 1 requires a stake of 0.000000000000000001 ETH, level 2 requires a stake of 0.000000000000000001 ETH. The ratio between such stakes can be exploited to perform resource exhaustion attacks.",
"risks": [
{
"category": "Funds can be stolen if",
"text": "an attacker successfully performs a resource exhaustion attack."
}
],
"references": [
{
"title": "Fraud Proof Wars: Arbitrum BoLD",
"url": "https://medium.com/l2beat/fraud-proof-wars-b0cb4d0f452a"
}
]
}
]
},
"stateValidationImage": "bold",
"warning": "Fraud proof system is fully deployed but is not yet permissionless as it requires Validators to be whitelisted."
}
permissions+87-24
{
"ethereum": {
"roles": [],
"actors": [
{
"id": "ProxyAdmin",
"name": "ProxyAdmin",
"accounts": [
{
"address": "eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD",
"type": "Contract",
"isVerified": false,
"name": "0x1232…90FD",
"url": "https://etherscan.io/address/0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
}
],
"chain": "ethereum",
"description": "* Can upgrade **with no delay**\n * Inbox \n * UpgradeExecutor \n * L1GatewayRouter \n * EdgeChallengeManager \n * L1ERC20Gateway \n * SequencerInbox \n * RollupEventInbox \n * Bridge \n * Outbox \n * L1WethGateway ",
"discoveryDrivenData": true
},
{
"id": "Safe",
"name": "Safe",
"description": "A Multisig with 2/3 threshold. \n* Can upgrade **with no delay**\n * RollupProxy [via: UpgradeExecutor]\n* Can interact with RollupProxy\n * Pause and unpause and set important roles and parameters in the system contracts: Can delegate Sequencer management to a BatchPosterManager address, manage data availability and DACs, set the Sequencer-only window, introduce an allowList to the bridge and whitelist Inboxes/Outboxes [via: UpgradeExecutor]",
"description": "A Multisig with 2/3 threshold. \n* Can upgrade **with no delay**\n * Inbox [via: UpgradeExecutor → ProxyAdmin]\n * RollupProxy [via: UpgradeExecutor]\n * UpgradeExecutor [via: UpgradeExecutor → ProxyAdmin]\n * L1GatewayRouter [via: UpgradeExecutor → ProxyAdmin]\n * EdgeChallengeManager [via: UpgradeExecutor → ProxyAdmin]\n * L1ERC20Gateway [via: UpgradeExecutor → ProxyAdmin]\n * SequencerInbox [via: UpgradeExecutor → ProxyAdmin]\n * RollupEventInbox [via: UpgradeExecutor → ProxyAdmin]\n * Bridge [via: UpgradeExecutor → ProxyAdmin]\n * Outbox [via: UpgradeExecutor → ProxyAdmin]\n * L1WethGateway [via: UpgradeExecutor → ProxyAdmin]\n* Can interact with RollupProxy\n * Pause and unpause and set important roles and parameters in the system contracts: Can delegate Sequencer management to a BatchPosterManager address, manage data availability and DACs, set the Sequencer-only window, introduce an allowList to the bridge and whitelist Inboxes/Outboxes [via: UpgradeExecutor]",
"accounts": [
{
"address": "eth:0x1F3Bdec08A161Ca9e5480feF33A3B2278c2931C5",
"type": "Contract",
"isVerified": true,
"name": "0x1F3B…31C5",
"url": "https://etherscan.io/address/0x1F3Bdec08A161Ca9e5480feF33A3B2278c2931C5"
}
],
"chain": "ethereum",
"references": [],
"participants": [
{
"address": "eth:0x29631c2da9Ab1C0Ca1935A463842a9484E34Fa17",
"type": "EOA",
"isVerified": true,
"name": "0x2963…Fa17",
"url": "https://etherscan.io/address/0x29631c2da9Ab1C0Ca1935A463842a9484E34Fa17"
},
{
"address": "eth:0x2584fd737d35bE395aa979b18602d0dE65f38b2c",
"type": "EOA",
"isVerified": true,
"name": "0x2584…8b2c",
"url": "https://etherscan.io/address/0x2584fd737d35bE395aa979b18602d0dE65f38b2c"
},
{
"address": "eth:0xb89C85BE593e6A8f7e35AC481b5F75Fc4036f31c",
"type": "EOA",
"isVerified": true,
"name": "0xb89C…f31c",
"url": "https://etherscan.io/address/0xb89C85BE593e6A8f7e35AC481b5F75Fc4036f31c"
}
],
"discoveryDrivenData": true
},
{
"id": "EOA-1-and-EOA-2",
"name": "EOA 1 and EOA 2",
"id": "EOA-2-and-EOA-3",
"name": "EOA 2 and EOA 3",
"accounts": [
{
"address": "eth:0x992D8d50548fCcCaF11147A9a692c496011C8Aa0",
"type": "EOA",
"isVerified": true,
"name": "0x992D…8Aa0",
"url": "https://etherscan.io/address/0x992D8d50548fCcCaF11147A9a692c496011C8Aa0",
"displayName": "EOA 1"
"displayName": "EOA 2"
},
{
"address": "eth:0xa0A1D8cd6f867a583a39232a477ff231aFD8eC4C",
"type": "EOA",
"isVerified": true,
"name": "0xa0A1…eC4C",
"url": "https://etherscan.io/address/0xa0A1D8cd6f867a583a39232a477ff231aFD8eC4C",
"displayName": "EOA 2"
"displayName": "EOA 3"
}
],
"chain": "ethereum",
"description": "* Can interact with RollupProxy\n * Can propose new state roots (called nodes) and challenge state roots on the host chain ",
"discoveryDrivenData": true
},
{
"id": "EOA-3",
"name": "EOA 3",
"id": "EOA-4",
"name": "EOA 4",
"accounts": [
{
"address": "eth:0xDaa526086787d9DEbE1D7F3FFdb1fE50cf8687F4",
"type": "EOA",
"isVerified": true,
"name": "0xDaa5…87F4",
"url": "https://etherscan.io/address/0xDaa526086787d9DEbE1D7F3FFdb1fE50cf8687F4",
"displayName": "EOA 3"
"displayName": "EOA 4"
}
],
"chain": "ethereum",
"description": "* Can interact with SequencerInbox\n * Can submit transaction batches or commitments to the SequencerInbox contract on the host chain ",
"discoveryDrivenData": true
}
]
},
"robinhood": {
"roles": [],
"actors": [
{
"id": "SafeL2",
"name": "SafeL2",
"description": "A Multisig with 2/3 threshold. \n* Can upgrade **with no delay**\n * L2UpgradeExecutor [via: L2UpgradeExecutor → ProxyAdmin]\n* Can interact with L2UpgradeExecutor\n * Can add or remove transaction filterers and change ArbOS configuration on the L2, without delay [via: L2UpgradeExecutor]",
"accounts": [
{
"address": "robinhood:0x1F3Bdec08A161Ca9e5480feF33A3B2278c2931C5",
"type": "Contract",
"isVerified": true,
"name": "0x1F3B…31C5",
"url": "https://robinhoodchain.blockscout.com/address/0x1F3Bdec08A161Ca9e5480feF33A3B2278c2931C5"
}
],
"chain": "robinhood",
"references": [],
"participants": [
{
"address": "robinhood:0x29631c2da9Ab1C0Ca1935A463842a9484E34Fa17",
"type": "EOA",
"isVerified": true,
"name": "0x2963…Fa17",
"url": "https://robinhoodchain.blockscout.com/address/0x29631c2da9Ab1C0Ca1935A463842a9484E34Fa17"
},
{
"address": "robinhood:0x2584fd737d35bE395aa979b18602d0dE65f38b2c",
"type": "EOA",
"isVerified": true,
"name": "0x2584…8b2c",
"url": "https://robinhoodchain.blockscout.com/address/0x2584fd737d35bE395aa979b18602d0dE65f38b2c"
},
{
"address": "robinhood:0xb89C85BE593e6A8f7e35AC481b5F75Fc4036f31c",
"type": "EOA",
"isVerified": true,
"name": "0xb89C…f31c",
"url": "https://robinhoodchain.blockscout.com/address/0xb89C85BE593e6A8f7e35AC481b5F75Fc4036f31c"
}
],
"discoveryDrivenData": true
},
{
"id": "EOA-1",
"name": "EOA 1",
"accounts": [
{
"address": "robinhood:0x663703B4bC1F5e896Af2854548d6380F45F1C5D0",
"type": "EOA",
"isVerified": true,
"name": "0x6637…C5D0",
"url": "https://robinhoodchain.blockscout.com/address/0x663703B4bC1F5e896Af2854548d6380F45F1C5D0",
"displayName": "EOA 1"
}
],
"chain": "robinhood",
"description": "* Can upgrade **with no delay**\n * L2UpgradeExecutor [via: L2UpgradeExecutor → ProxyAdmin]\n* Can interact with L2UpgradeExecutor\n * Can add or remove transaction filterers and change ArbOS configuration on the L2, without delay [via: L2UpgradeExecutor]",
"discoveryDrivenData": true
},
{
"id": "TransactionFilterer",
"name": "TransactionFilterer",
"accounts": [
{
"address": "robinhood:0xebDc18A1F5C42fC25552eA233fAcf4054DF224b7",
"type": "EOA",
"isVerified": true,
"name": "0xebDc…24b7",
"url": "https://robinhoodchain.blockscout.com/address/0xebDc18A1F5C42fC25552eA233fAcf4054DF224b7",
"displayName": "TransactionFilterer"
}
],
"chain": "robinhood",
"description": "* Can interact with ArbFilteredTransactionsManager\n * Can register/remove transaction hashes in the ArbFilteredTransactionsManager precompile, causing the state transition function to forcibly fail those transactions, including force-included ones, without delay ",
"discoveryDrivenData": true
}
]
}
}
contracts+128-35
{
"addresses": {
"ethereum": [
{
"name": "RollupProxy",
"isVerified": false,
"isVerified": true,
"address": "eth:0x23A19d23e89166adedbDcB432518AB01e4272D94",
"upgradeability": {
"proxyType": "Arbitrum proxy",
"admins": [
"eth:0x552603b4bc1f5E896AF2854548D6380f45f1B4bf"
],
"implementations": [
"eth:0xAb7A44CE7e66963d2116dCe74AB63eeF88266C82",
"eth:0xedC23dFC7D1e57EC07eA5ff7419634DbAe08Ed2C"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0xAb7A44CE7e66963d2116dCe74AB63eeF88266C82",
"eth:0xedC23dFC7D1e57EC07eA5ff7419634DbAe08Ed2C"
]
}
],
"description": "Central contract for the project's configuration like its execution logic hash (`wasmModuleRoot`) and addresses of the other system contracts. Entry point for Proposers creating new assertions (state commitments) and Challengers submitting fraud proofs (In the Orbit stack, these two roles are both called Validators).\n* Roles:\n * **admin**: UpgradeExecutor; ultimately Safe\n * **getValidators**: EOA 1, EOA 2\n * **owner**: UpgradeExecutor; ultimately Safe",
"description": "Central contract for the project's configuration like its execution logic hash (`wasmModuleRoot`) and addresses of the other system contracts. Entry point for Proposers creating new assertions (state commitments) and Challengers submitting fraud proofs (In the Orbit stack, these two roles are both called Validators).\n* Roles:\n * **admin**: UpgradeExecutor; ultimately Safe\n * **getValidators**: EOA 2, EOA 3\n * **owner**: UpgradeExecutor; ultimately Safe",
"upgradableBy": [
{
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x23A19d23e89166adedbDcB432518AB01e4272D94#code"
},
{
"name": "EdgeChallengeManager",
"isVerified": false,
"isVerified": true,
"address": "eth:0x6f38FC91105Fc9a43931DcA33450ab3315E3D4Fa",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xCAaa9332F940362aEAAADD1B0A59c229C4fD8f79"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0xCAaa9332F940362aEAAADD1B0A59c229C4fD8f79"
]
}
],
"description": "Contract that implements the main challenge protocol logic of the fraud proof system.\n* Roles:\n * **admin**: ProxyAdmin",
"description": "Contract that implements the main challenge protocol logic of the fraud proof system.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x6f38FC91105Fc9a43931DcA33450ab3315E3D4Fa#code"
},
{
"name": "SequencerInbox",
"isVerified": false,
"isVerified": true,
"address": "eth:0xBd0D173EEb87D57A09521c24388a12789F33ba96",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xb015D78fb9B890e96FD3E23819b2C8D9fffA3cC5"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0xb015D78fb9B890e96FD3E23819b2C8D9fffA3cC5"
]
}
],
"description": "A sequencer (registered in this contract) can submit transaction batches or commitments here.\n* Roles:\n * **admin**: ProxyAdmin\n * **batchPosters**: EOA 3",
"description": "A sequencer (registered in this contract) can submit transaction batches or commitments here.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe\n * **batchPosters**: EOA 4",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0xBd0D173EEb87D57A09521c24388a12789F33ba96#code"
},
{
"name": "Bridge",
"isVerified": false,
"isVerified": true,
"address": "eth:0xDf8755334ce7A73cCF6b581C02eA649AE3E864b3",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xC678f7B95A7D1F77c6024c0086301D21402854b1"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0xC678f7B95A7D1F77c6024c0086301D21402854b1"
]
}
],
"description": "Escrow contract for the project's gas token (can be different from ETH). Keeps a list of allowed Inboxes and Outboxes for canonical bridge messaging.\n* Roles:\n * **admin**: ProxyAdmin",
"description": "Escrow contract for the project's gas token (can be different from ETH). Keeps a list of allowed Inboxes and Outboxes for canonical bridge messaging.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0xDf8755334ce7A73cCF6b581C02eA649AE3E864b3#code"
},
{
"name": "UpgradeExecutor",
"isVerified": false,
"isVerified": true,
"address": "eth:0x552603b4bc1f5E896AF2854548D6380f45f1B4bf",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0x9149DF379237a935cf0658fE54D2325109493CBb"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0x9149DF379237a935cf0658fE54D2325109493CBb"
]
}
],
"description": "Central contract defining the access control permissions for upgrading the system contract implementations.\n* Roles:\n * **admin**: ProxyAdmin\n * **executors**: Safe",
"description": "Central contract defining the access control permissions for upgrading the system contract implementations.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe\n * **executors**: Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x552603b4bc1f5E896AF2854548D6380f45f1B4bf#code"
},
{
"name": "Inbox",
"isVerified": false,
"isVerified": true,
"address": "eth:0x1A07cc4BD17E0118BdB54D70990D2158AbAD7a2D",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0x8D3b93dfFFf4842E7B61FB553b383db2C6BC91c6"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0x8D3b93dfFFf4842E7B61FB553b383db2C6BC91c6"
]
}
],
"description": "Facilitates sending L1 to L2 messages like depositing ETH, but does not escrow funds.\n* Roles:\n * **admin**: ProxyAdmin",
"description": "Facilitates sending L1 to L2 messages like depositing ETH, but does not escrow funds.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x1A07cc4BD17E0118BdB54D70990D2158AbAD7a2D#code"
},
{
"name": "L1ERC20Gateway",
"isVerified": true,
"address": "eth:0x85001CC4867C5e1C22dA4B79BB8852B9e2a06da0",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xf43bce5D32742FFC862eA182b0b5544CbDBB0F02"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567931,
"transactionHash": "0x80b3040805a5b37638da6908f951e15306edabbf4773c7b53116daef4f72a04f",
"implementations": [
"eth:0xf43bce5D32742FFC862eA182b0b5544CbDBB0F02"
]
}
],
"description": "Escrows deposited ERC-20 assets for the canonical Bridge. Upon depositing, a generic token representation will be minted at the destination. Withdrawals are initiated by the Outbox contract.\n* Roles:\n * **admin**: ProxyAdmin",
"description": "Escrows deposited ERC-20 assets for the canonical Bridge. Upon depositing, a generic token representation will be minted at the destination. Withdrawals are initiated by the Outbox contract.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x85001CC4867C5e1C22dA4B79BB8852B9e2a06da0#code"
},
{
"name": "Outbox",
"isVerified": false,
"isVerified": true,
"address": "eth:0xf0ce991ea4A0d2400A4AB49b20ae333f6Dce3DE9",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0x396765AEbE540575ef927F769b0d7b89594f931c"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0x396765AEbE540575ef927F769b0d7b89594f931c"
]
}
],
"description": "Facilitates L2 to L1 contract calls: Messages initiated from L2 (for example withdrawal messages) eventually resolve in execution on L1.\n* Roles:\n * **admin**: ProxyAdmin",
"description": "Facilitates L2 to L1 contract calls: Messages initiated from L2 (for example withdrawal messages) eventually resolve in execution on L1.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0xf0ce991ea4A0d2400A4AB49b20ae333f6Dce3DE9#code"
},
{
"name": "L1GatewayRouter",
"isVerified": true,
"address": "eth:0x6a2E3a1e16FC29f27Ce61429746D558d656975bB",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0x6525137BfF366fbc0A89E3e5A4d244B5A0090a6D"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567931,
"transactionHash": "0x80b3040805a5b37638da6908f951e15306edabbf4773c7b53116daef4f72a04f",
"implementations": [
"eth:0x6525137BfF366fbc0A89E3e5A4d244B5A0090a6D"
]
}
],
"description": "This routing contract maps tokens to the correct escrow (gateway) to be then bridged with canonical messaging.\n* Roles:\n * **admin**: ProxyAdmin",
"description": "This routing contract maps tokens to the correct escrow (gateway) to be then bridged with canonical messaging.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x6a2E3a1e16FC29f27Ce61429746D558d656975bB#code"
},
{
"name": "ProxyAdmin",
"isVerified": true,
"address": "eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "ethereum",
"description": "* Roles:\n * **owner**: UpgradeExecutor",
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x1232813BDd40aa9d53066A880dE78a4Be70B90FD#code"
},
{
"name": "OneStepProverMath",
"isVerified": true,
"address": "eth:0x4B15E064d5d55705E89080bDEA4BFe4cF20D6114",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "ethereum",
"description": "One of the modular contracts used for the last step of a fraud proof, which is simulated inside a WASM virtual machine.\n",
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x4B15E064d5d55705E89080bDEA4BFe4cF20D6114#code"
},
{
"name": "OneStepProofEntry",
"isVerified": true,
"address": "eth:0x5087a6fD526eFD5c6770d94D0c325de0e2A2c44D",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "ethereum",
"description": "One of the modular contracts used for the last step of a fraud proof, which is simulated inside a WASM virtual machine.\n",
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x5087a6fD526eFD5c6770d94D0c325de0e2A2c44D#code"
},
{
"name": "OneStepProverMemory",
"isVerified": true,
"address": "eth:0x665CEA1cA6C36aB701f4C6AE895b156f79C51c35",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "ethereum",
"description": "One of the modular contracts used for the last step of a fraud proof, which is simulated inside a WASM virtual machine.\n",
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x665CEA1cA6C36aB701f4C6AE895b156f79C51c35#code"
},
{
"name": "OneStepProver0",
"isVerified": true,
"address": "eth:0x6fE84aC811EBEcd888Eca93757fEa378Bb03b00c",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "ethereum",
"description": "One of the modular contracts used for the last step of a fraud proof, which is simulated inside a WASM virtual machine.\n",
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0x6fE84aC811EBEcd888Eca93757fEa378Bb03b00c#code"
},
{
"name": "Wrapped Ether Token",
"isVerified": true,
"address": "eth:0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "ethereum",
"description": "",
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2#code"
},
{
"name": "RollupEventInbox",
"isVerified": false,
"isVerified": true,
"address": "eth:0xc34f4907822d1cDC6aE3038Be22e6f12DEa35bd4",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0x796FeE4adceD1cb47a3e3d1B6925472F8fC8f1f9"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0x796FeE4adceD1cb47a3e3d1B6925472F8fC8f1f9"
]
}
],
"description": "Helper contract sending configuration data over the bridge during the systems initialization.\n* Roles:\n * **admin**: ProxyAdmin",
"description": "Helper contract sending configuration data over the bridge during the systems initialization.\n* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0xc34f4907822d1cDC6aE3038Be22e6f12DEa35bd4#code"
},
{
"name": "OneStepProverHostIo",
"isVerified": true,
"address": "eth:0xe1aAfAfBde42f043495B39d1a15a58E91c894Fbf",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "ethereum",
"description": "One of the modular contracts used for the last step of a fraud proof, which is simulated inside a WASM virtual machine.\n",
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0xe1aAfAfBde42f043495B39d1a15a58E91c894Fbf#code"
},
{
"name": "L1WethGateway",
"isVerified": true,
"address": "eth:0xF7e12b9614b509C747ab4423bC4ACF923759Cf1B",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xa86996bED19547f7dEf22a087dD61b5F9Fb6C684"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567931,
"transactionHash": "0x80b3040805a5b37638da6908f951e15306edabbf4773c7b53116daef4f72a04f",
"implementations": [
"eth:0xa86996bED19547f7dEf22a087dD61b5F9Fb6C684"
]
}
],
"description": "* Roles:\n * **admin**: ProxyAdmin",
"description": "* Roles:\n * **admin**: ProxyAdmin; ultimately Safe",
"upgradableBy": [
{
"name": "ProxyAdmin",
"name": "Safe",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://etherscan.io/address/0xF7e12b9614b509C747ab4423bC4ACF923759Cf1B#code"
}
],
"robinhood": [
{
"name": "L2UpgradeExecutor",
"isVerified": true,
"address": "robinhood:0x2A153c6A1B66DBc930a8d7017230ab0253005C09",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"robinhood:0xa3Acd31AFb851B4eB9DAD00F5204c01D924267dF"
],
"implementations": [
"robinhood:0x3c3E52bC8C181D06A76e2518bBc655C5BB3Ce7Cd"
]
},
"chain": "robinhood",
"pastUpgrades": [
{
"timestamp": 1777567931,
"transactionHash": "0x05317cd173ba8e973c7e88aeb7f7e56eb22cf05c12552d4283c993dbb1f56b12",
"implementations": [
"robinhood:0xE83b11Faa5693E68388785FecA3595C6805dFb9a"
]
},
{
"timestamp": 1777567931,
"transactionHash": "0x05317cd173ba8e973c7e88aeb7f7e56eb22cf05c12552d4283c993dbb1f56b12",
"implementations": [
"robinhood:0x3c3E52bC8C181D06A76e2518bBc655C5BB3Ce7Cd"
]
}
],
"description": "ArbOS chain owner (UpgradeExecutor). Manages the ArbOwner chain-owner set and the transaction-filterer set, and can upgrade ArbOS configuration without delay.\n* Roles:\n * **admin**: ProxyAdmin; ultimately EOA 1, SafeL2\n * **chainOwners**: L2UpgradeExecutor; ultimately EOA 1, SafeL2\n * **executors**: EOA 1, SafeL2",
"upgradableBy": [
{
"name": "SafeL2",
"delay": "no"
},
{
"id": "EOA-1",
"name": "EOA 1",
"delay": "no"
}
],
"discoveryDrivenData": true,
"url": "https://robinhoodchain.blockscout.com/address/0x2A153c6A1B66DBc930a8d7017230ab0253005C09#code"
},
{
"name": "ArbFilteredTransactionsManager",
"isVerified": true,
"address": "robinhood:0x0000000000000000000000000000000000000074",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "robinhood",
"references": [
{
"title": "Source Code",
"url": "https://github.com/OffchainLabs/nitro/blob/v3.11.0/precompiles/ArbFilteredTransactionsManager.go"
}
],
"description": "ArbOS 61 transaction-filtering precompile. An authorized filterer registers tx hashes here; the state transition function then forcibly fails those transactions, including force-included ones, without delay.\n* Roles:\n * **transactionFilterers**: TransactionFilterer",
"discoveryDrivenData": true,
"url": "https://robinhoodchain.blockscout.com/address/0x0000000000000000000000000000000000000074#code"
},
{
"name": "ProxyAdmin",
"isVerified": true,
"address": "robinhood:0xa3Acd31AFb851B4eB9DAD00F5204c01D924267dF",
"upgradeability": {
"proxyType": "immutable",
"admins": [],
"implementations": [],
"immutable": true
},
"chain": "robinhood",
"description": "* Roles:\n * **owner**: L2UpgradeExecutor",
"discoveryDrivenData": true,
"url": "https://robinhoodchain.blockscout.com/address/0xa3Acd31AFb851B4eB9DAD00F5204c01D924267dF#code"
}
]
},
"escrows": [
{
"address": "0xDf8755334ce7A73cCF6b581C02eA649AE3E864b3",
"sinceTimestamp": 1777567919,
"tokens": [
"ETH"
],
"contract": {
"isVerified": false,
"isVerified": true,
"address": "eth:0xDf8755334ce7A73cCF6b581C02eA649AE3E864b3",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xC678f7B95A7D1F77c6024c0086301D21402854b1"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567919,
"transactionHash": "0x7982d3d9da29185af78f7802cd2bdb04bdfb702766bb583c3b2804d762dc1fa8",
"implementations": [
"eth:0xC678f7B95A7D1F77c6024c0086301D21402854b1"
]
}
],
"description": "Contract managing Inboxes and Outboxes. It escrows ETH sent to L2.",
"upgradableBy": [
{
"name": "ProxyAdmin",
"delay": "no"
}
],
"url": "https://etherscan.io/address/0xDf8755334ce7A73cCF6b581C02eA649AE3E864b3#code"
},
"chain": "ethereum",
"includeInTotal": true,
"chainId": 1
},
{
"address": "0x85001CC4867C5e1C22dA4B79BB8852B9e2a06da0",
"sinceTimestamp": 1777567931,
"tokens": "*",
"contract": {
"name": "L1ERC20Gateway",
"isVerified": true,
"address": "eth:0x85001CC4867C5e1C22dA4B79BB8852B9e2a06da0",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xf43bce5D32742FFC862eA182b0b5544CbDBB0F02"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567931,
"transactionHash": "0x80b3040805a5b37638da6908f951e15306edabbf4773c7b53116daef4f72a04f",
"implementations": [
"eth:0xf43bce5D32742FFC862eA182b0b5544CbDBB0F02"
]
}
],
"description": "Escrows deposited ERC-20 assets for the canonical Bridge. Upon depositing, a generic token representation will be minted at the destination. Withdrawals are initiated by the Outbox contract.",
"url": "https://etherscan.io/address/0x85001CC4867C5e1C22dA4B79BB8852B9e2a06da0#code"
},
"chain": "ethereum",
"includeInTotal": true,
"chainId": 1
},
{
"address": "0xF7e12b9614b509C747ab4423bC4ACF923759Cf1B",
"sinceTimestamp": 1777567931,
"tokens": "*",
"contract": {
"name": "L1WethGateway",
"isVerified": true,
"address": "eth:0xF7e12b9614b509C747ab4423bC4ACF923759Cf1B",
"upgradeability": {
"proxyType": "EIP1967 proxy",
"admins": [
"eth:0x1232813BDd40aa9d53066A880dE78a4Be70B90FD"
],
"implementations": [
"eth:0xa86996bED19547f7dEf22a087dD61b5F9Fb6C684"
]
},
"chain": "ethereum",
"pastUpgrades": [
{
"timestamp": 1777567931,
"transactionHash": "0x80b3040805a5b37638da6908f951e15306edabbf4773c7b53116daef4f72a04f",
"implementations": [
"eth:0xa86996bED19547f7dEf22a087dD61b5F9Fb6C684"
]
}
],
"description": "Escrows WETH deposited through the canonical Bridge, minting a wrapped representation at the destination.",
"url": "https://etherscan.io/address/0xF7e12b9614b509C747ab4423bC4ACF923759Cf1B#code"
},
"chain": "ethereum",
"includeInTotal": true,
"chainId": 1
}
],
"programHashes": [
{
"title": "ArbOS wasmModuleRoot v61",
"description": "A commitment to the exact WASM binary version used for Orbit stack optimistic dispute games.",
"verificationStatus": "notVerified",
"hash": "0xc10cd7ec6acaf1c441a3f6bd0900ad20f15855ba775a96f1939118cbc629dc97"
}
],
"risks": [
{
"category": "Funds can be stolen if",
"text": "a contract receives a malicious code upgrade. There is no delay on code upgrades.",
"isCritical": true
},
{
"category": "Funds can be stolen if",
"text": "the source code of unverified contracts contains malicious code.",
"isCritical": true
}
],
"zkVerifiers": []
}