# Fraxtal Markdown version of https://l2beat.com/layer2s/projects/fraxtal ## Summary **Warning:** Why is the project listed in others? The proof system isn't fully functional. Consequence: projects without a proper proof system fully rely on single entities to safely update the state. A malicious proposer can finalize an invalid state, which can cause loss of funds. There is no data availability bridge. Consequence: projects without a data availability bridge fully rely on single entities (the sequencer) to honestly rely available data roots on Ethereum. A malicious sequencer can collude with the proposer to finalize an unavailable state, which can cause loss of funds. Learn more about the [recategorisation](https://medium.com/l2beat/framework-update-l2-projects-recategorisation-5d43b0d1fe50). - Total Value Secured: $156.77 M (-0.86% compared to seven days ago; canonically bridged $156.22 M, natively minted $0.00, externally bridged $554.12 K; 0.35% with additional trust assumptions compared to the tokens involved and the Stage assigned to the project's canonical messaging bridge) - TVS by asset: ETH & derivatives $5.64 M (3.60%), Stablecoins $124.95 M (79.7%), BTC & derivatives $4.57 K (0.00%), Other $26.16 M (16.6%) - Associated tokens: FRAX, FPIS: $19.21 M (12.2% of TVS) - Past day UOPS: 0.16 (-4.06% compared to seven days ago) - Gas token: FRAX - Type: Other - Purpose: Universal - Host chain: Ethereum - Chain ID: 252 ### Risks - Sequencer failure: Self sequence (12h delay; sentiment: good) - State validation: None (7d challenge period; sentiment: bad) - Data availability: External (sentiment: bad) - Exit window: None (sentiment: bad) - Proposer failure: Cannot withdraw (sentiment: bad) ### About Fraxtal is an EVM equivalent Optimium utilizing the OP stack as its smart contract platform and execution environment. ### Links - Website: https://frax.com/ - Bridge: https://app.frax.finance/ - Docs: https://docs.frax.com/ - Explorer: https://fraxscan.com/ - Repository: https://github.com/FraxFinance - Social: https://discord.com/invite/fraxfinance, https://twitter.com/fraxfinance, https://t.me/fraxfinance - Other: https://growthepie.com/chains/fraxtal - Contracts explorer (Disco): https://disco.l2beat.com/ui/p/fraxtal ### Badges - EVM: This project uses the Ethereum Virtual Machine to run its smart contracts and supports the Solidity programming language - Custom DA solution: This project is using a custom DA solution - Built on OP Stack: The project is built on the OP Stack ## Value Secured The interactive TVS charts are shown on [the HTML page](https://l2beat.com/layer2s/projects/fraxtal#tvs). Token by token: [TVS breakdown](https://l2beat.com/layer2s/projects/fraxtal/tvs-breakdown). - [TVS chart (JSON)](https://l2beat.com/api/scaling/tvs/fraxtal) - [TVS breakdown by token (JSON)](https://l2beat.com/api/scaling/tvs/fraxtal/breakdown) ## Activity The interactive activity chart is shown on [the HTML page](https://l2beat.com/layer2s/projects/fraxtal#activity). - [Activity chart (JSON)](https://l2beat.com/api/scaling/activity/fraxtal) ## Onchain costs The section shows the operating costs that L2s pay to Ethereum. The interactive costs chart is shown on [the HTML page](https://l2beat.com/layer2s/projects/fraxtal#onchain-costs). ### Tracked transactions #### Batch submissions - transfer: 2024-02-01 18:19 UTC - now; currently used; from: [0x6017f75108f251a488B045A7ce2a7C15b179d1f2](https://etherscan.io/address/0x6017f75108f251a488B045A7ce2a7C15b179d1f2); to: [0xfF000000000000000000000000000000000420fC](https://etherscan.io/address/0xfF000000000000000000000000000000000420fC) #### State updates - functionCall: 2024-02-01 18:19 UTC - now; currently used; address: [0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4); selector: 0x9aaab648; signature: `function proposeL2Output(bytes32 _outputRoot, uint256 _l2BlockNumber, bytes32 _l1Blockhash, uint256 _l1BlockNumber)` ## Liveness This section shows how "live" the project's operators are by displaying how frequently they submit transactions of the selected type. It also highlights anomalies - significant deviations from their typical schedule. No ongoing anomalies detected. The interactive liveness chart is shown on [the HTML page](https://l2beat.com/layer2s/projects/fraxtal#liveness). ### Tracked transactions #### Batch submissions - transfer: 2024-02-01 18:19 UTC - now; currently used; from: [0x6017f75108f251a488B045A7ce2a7C15b179d1f2](https://etherscan.io/address/0x6017f75108f251a488B045A7ce2a7C15b179d1f2); to: [0xfF000000000000000000000000000000000420fC](https://etherscan.io/address/0xfF000000000000000000000000000000000420fC) #### State updates - functionCall: 2024-02-01 18:19 UTC - now; currently used; address: [0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4); selector: 0x9aaab648; signature: `function proposeL2Output(bytes32 _outputRoot, uint256 _l2BlockNumber, bytes32 _l1Blockhash, uint256 _l1BlockNumber)` ### Last 30 day anomalies All liveness anomalies detected for this project in the last 30 days, helping you review recent downtime and availability issues. - No state updates were performed for 5h 7m (from 2026-10-11 22:29 UTC until 2026-10-12 03:36 UTC). These typically occur every 1h on average. - No tx data submissions were performed for 4h 22m (from 2026-10-11 22:55 UTC until 2026-10-12 03:17 UTC). These typically occur every 26m 30s on average. - No state updates were performed for 2h 52m (from 2026-10-06 12:21 UTC until 2026-10-06 15:13 UTC). These typically occur every 1h on average. - No tx data submissions were performed for 2h 9m (from 2026-10-06 12:42 UTC until 2026-10-06 14:52 UTC). These typically occur every 26m 30s on average. ## Risk summary **Warning:** Fraud proof system is currently under development. Users need to trust the block proposer to submit correct L1 state roots. ### Funds can be stolen if 1. a contract receives a malicious code upgrade. There is no delay on code upgrades (CRITICAL), 2. an invalid state root is submitted to the system (CRITICAL). ### Funds can be lost if 3. the data is not made available on the external provider (CRITICAL), 4. the sequencer posts an unavailable or malicious transaction root (CRITICAL). ### Funds can be frozen if 5. the centralized validator goes down. Users cannot produce blocks themselves and exiting the system requires new block production (CRITICAL). ### MEV can be extracted if 6. the operator exploits their centralized position and frontruns user transactions. ## Risk analysis **Warning:** Fraud proof system is currently under development. Users need to trust the block proposer to submit correct L1 state roots. ### Sequencer failure Self sequence (12h delay; sentiment: good) 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 12h delay on this operation. ### State validation None (7d challenge period; sentiment: bad) Currently the system permits invalid state roots. More details in project overview. ### Data availability External (sentiment: bad) Proof construction and state derivation rely fully on data that is NOT published on chain. Fraxtal uses a separate data availability module developed by the Frax Core Team, and data availability attestations are not published on chain. ### Exit window None (sentiment: bad) There is no window for users to exit in case of an unwanted upgrade since contracts are instantly upgradable. ### Proposer failure Cannot withdraw (sentiment: bad) Only the whitelisted proposers can publish state roots on L1, so in the event of failure the withdrawals are frozen. ## Stage Fraxtal is not even a Stage 0 project. ### Stage 0 1 issue needs fixing. - Met: The project self-identifies as a Validium or Optimium. - Met: State roots are posted to Ethereum L1. - Met: A source-available node exists that can reconstruct the L2 state when DA is accessible. Please note that the L2BEAT team has not verified the validity of the node source code. [View code](https://github.com/ethereum-optimism/optimism/tree/develop/op-node) - Issue: The proof system is still under development. ### Stage 1 3 issues need fixing. **Principle** - Issue: Compromising ≥75% of the Security Council to push a malicious upgrade, or sequencer+DA-committee collusion to withhold data and finalize invalid state roots, should be the only ways (other than bugs) to steal funds or block withdrawals indefinitely. **Guidelines** - Issue: Users' withdrawals can be censored by the permissioned operators. - Issue: Upgrades executed by actors with more centralized control than a Security Council provide less than 7d for users to exit if the permissioned operator is down or censoring. [Learn more about Stages](https://l2beat.com/stages). Please keep in mind that these stages do not reflect project security, this is an opinionated assessment of project maturity based on subjective criteria, created with a goal of incentivizing projects to push toward better decentralization. Each team may have taken different paths to achieve this goal. ## Data availability FraxtalDA is a custom data availability solution built by the Fraxtal team. ### Risk analysis #### Economic security None (sentiment: bad) There are no onchain assets at risk of being slashed in case of a data withholding attack, and the committee members are not publicly known. #### Fraud detection None (sentiment: bad) There is no fraud detection mechanism in place. A data withholding attack can only be detected by nodes downloading the full data from the DA layer. ### Technology #### Architecture FraxtalDA is a custom data availability solution built by the Fraxtal team. The data is posted by the OP batcher to three separate locations: AWS, IPFS, and Cloudflare R2. The IPFS hash is then submitted to the onchain inbox contract on Ethereum. FraxtalDA relies on a single DA endpoint to manage data posting between the three different locations. ![FraxtalDA](https://l2beat.com/images/da-layer-technology/fraxtalDA/FraxtalDA.png#center) The sequencer attests to data availability by posting an IPFS hash to an onchain inbox contract on Ethereum. L2 nodes derive the L2 chain from the L1 by reading transactions commitments from this sequencer inbox. When reading from the inbox, the op-node verifies that the commitment hash is a valid IPFS CID. If the data corresponding to the hash is missing from IPFS, the op-node will halt, preventing further derivation of the L2 chain. #### DA Bridge The SequencerInbox only stores IPFS hash commitments posted by the sequencer. It is not possible to verify blob inclusion against the data commitments onchain. Projects not integrating with a functional DA bridge rely only on the data availability attestation of the sequencer.There is no committee attesting to the availability of the data. For L2 chain derivation, the system relies on sequencer commitments to an L1 onchain inbox. See DA layer technology section for more details. **Risks** - Funds can be lost if the sequencer posts an invalid data availability commitment. **References** - [FraxtalDA Documentation](https://docs.frax.com/fraxtal/network/data-availability) - [Fraxtal DA Follower - Source Code](https://github.com/FraxFinance/fraxtal-da-follower/blob/791e849b41465e1e00377f57c8f0c49d4b13caa8/main.go) ## State validation ### No state validation OP Stack projects can use the OP fault proof system, already being deployed on some. This project though is not using fault proofs yet and is relying on the honesty of the permissioned Proposer and Challengers to ensure state correctness. The smart contract system permits invalid state roots. **Risks** - Funds can be stolen if an invalid state root is submitted to the system (CRITICAL). **References** - [L2OutputOracle.sol - source code, deleteL2Outputs function](https://etherscan.io/address/0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65#code) ## Upgrades & Governance ### Past upgrades The metrics include upgrades on the currently used proxy contracts. Historical proxy contracts and changes of such are not included. - Count of upgrades: 35 - Last upgrade: 1y ago - Avg upgrade interval: 5mo 14d - 2025-09-22 19:07 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xf2882d571b3a770d737ce0b81adb738b116e94a1d16f19a9cc837fdc20b25f05](https://etherscan.io/tx/0xf2882d571b3a770d737ce0b81adb738b116e94a1d16f19a9cc837fdc20b25f05), implementations: [0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2](https://etherscan.io/address/0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2)) - 2025-08-18 19:16 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0xd30B971922D42AA46C8A6432C332547432C89E14/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0xd30B971922D42AA46C8A6432C332547432C89E14](https://etherscan.io/address/0xd30B971922D42AA46C8A6432C332547432C89E14#code) ([diff](https://disco.l2beat.com/diff/eth:0xcA11bde05977b3631167028862bE2a173976CA11/eth:0xd30B971922D42AA46C8A6432C332547432C89E14)) - 2025-08-18 19:16 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae](https://etherscan.io/address/0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae)) - 2025-08-18 19:16 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x597959A313643Ed15d45dfbCC422321E72A84515/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x597959A313643Ed15d45dfbCC422321E72A84515](https://etherscan.io/address/0x597959A313643Ed15d45dfbCC422321E72A84515#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0x597959A313643Ed15d45dfbCC422321E72A84515)) - 2025-08-18 19:16 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878](https://etherscan.io/address/0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878)) - 2025-06-02 20:28 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6](https://etherscan.io/tx/0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6), implementations: [0xcA11bde05977b3631167028862bE2a173976CA11](https://etherscan.io/address/0xcA11bde05977b3631167028862bE2a173976CA11#code) ([diff](https://disco.l2beat.com/diff/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f/eth:0xcA11bde05977b3631167028862bE2a173976CA11)) - 2025-06-02 20:28 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6](https://etherscan.io/tx/0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6), implementations: [0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f](https://etherscan.io/address/0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f)) - 2025-04-29 19:05 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f](https://etherscan.io/address/0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f)) - 2025-04-29 19:05 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D](https://etherscan.io/address/0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D)) - 2025-04-29 19:05 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618](https://etherscan.io/address/0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618)) - 2025-04-29 19:05 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0x7eecF36F384732F229D494E072a48fF294861fC2/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x7eecF36F384732F229D494E072a48fF294861fC2](https://etherscan.io/address/0x7eecF36F384732F229D494E072a48fF294861fC2#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0x7eecF36F384732F229D494E072a48fF294861fC2)) - 2025-04-29 19:05 UTC, upgrade of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0x72D205182538207478dA7baFf0181884993D279A/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x72D205182538207478dA7baFf0181884993D279A](https://etherscan.io/address/0x72D205182538207478dA7baFf0181884993D279A#code) ([diff](https://disco.l2beat.com/diff/eth:0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876/eth:0x72D205182538207478dA7baFf0181884993D279A)) - 2024-05-14 20:13 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23](https://etherscan.io/address/0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23#code) ([diff](https://disco.l2beat.com/diff/eth:0x59B6903044Fa9439a5D621D3605789A6E654b1D6/eth:0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23)) - 2024-05-14 20:13 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367](https://etherscan.io/address/0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367#code) ([diff](https://disco.l2beat.com/diff/eth:0x22052c592f763CA14a090D9974c5Bf9Fd3a44b8c/eth:0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367)) - 2024-05-14 20:13 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8](https://etherscan.io/address/0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8#code) ([diff](https://disco.l2beat.com/diff/eth:0x31c25985E6b10CF335FC01cf9790aF4890d0505c/eth:0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8)) - 2024-05-14 20:13 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4](https://etherscan.io/address/0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4#code) ([diff](https://disco.l2beat.com/diff/eth:0x23A0478996241F9f966b7054c06FdeB96Ddf3475/eth:0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4)) - 2024-05-14 20:13 UTC, upgrade of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65](https://etherscan.io/address/0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65#code) ([diff](https://disco.l2beat.com/diff/eth:0x84c2f365733c6560bd49D8768d9c23B07A9DD630/eth:0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65)) - 2024-02-19 16:52 UTC, upgrade of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0x105f432213e819e064f46a07b935289add9f1139c9c91db7fd45d0f6fe213b1f](https://etherscan.io/tx/0x105f432213e819e064f46a07b935289add9f1139c9c91db7fd45d0f6fe213b1f), implementations: [0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876](https://etherscan.io/address/0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876#code) ([diff](https://disco.l2beat.com/diff/eth:0x1120ef11d4C3dc90Aa6BDfce16Ab049dd5d18aE0/eth:0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876)) - 2024-02-02 23:44 UTC, upgrade of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0x3b6b6b8395ca0242ffaf46aba40335b8dce65cab470d7a188a3afe13723ee3db](https://etherscan.io/tx/0x3b6b6b8395ca0242ffaf46aba40335b8dce65cab470d7a188a3afe13723ee3db), implementations: [0x84c2f365733c6560bd49D8768d9c23B07A9DD630](https://etherscan.io/address/0x84c2f365733c6560bd49D8768d9c23B07A9DD630#code) ([diff](https://disco.l2beat.com/diff/eth:0xA30ADd78D5be6B2B55C934666bb4fF2C4429d800/eth:0x84c2f365733c6560bd49D8768d9c23B07A9DD630)) - 2024-02-02 23:44 UTC, upgrade of [SuperchainConfig](https://etherscan.io/address/0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4#code): transaction [0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644](https://etherscan.io/tx/0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644), implementations: [0xb851fc304fCa88EDC89C287687AF4F6d7810bc14](https://etherscan.io/address/0xb851fc304fCa88EDC89C287687AF4F6d7810bc14#code) ([diff](https://disco.l2beat.com/diff/eth:0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4/eth:0xb851fc304fCa88EDC89C287687AF4F6d7810bc14)) - 2024-02-02 23:44 UTC, upgrade of [SuperchainConfig](https://etherscan.io/address/0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4#code): transaction [0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644](https://etherscan.io/tx/0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644), implementations: [0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4](https://etherscan.io/address/0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4#code) ([diff](https://disco.l2beat.com/diff/eth:0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4/eth:0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4)) - 2024-02-01 18:20 UTC, deployment of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xe7e33bcdd2dd085bcd43e933aefa52eeffb6a4656facdfae956eba8bfe2f537b](https://etherscan.io/tx/0xe7e33bcdd2dd085bcd43e933aefa52eeffb6a4656facdfae956eba8bfe2f537b), implementations: [0x59B6903044Fa9439a5D621D3605789A6E654b1D6](https://etherscan.io/address/0x59B6903044Fa9439a5D621D3605789A6E654b1D6#code) - 2024-02-01 18:20 UTC, deployment of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0xda02c330c54f6dc923beb0d9f720a4caaae75238f52d24902d56624b0410a65b](https://etherscan.io/tx/0xda02c330c54f6dc923beb0d9f720a4caaae75238f52d24902d56624b0410a65b), implementations: [0xA30ADd78D5be6B2B55C934666bb4fF2C4429d800](https://etherscan.io/address/0xA30ADd78D5be6B2B55C934666bb4fF2C4429d800#code) - 2024-02-01 18:20 UTC, deployment of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xe7aacfcc1d50443042842246a38e54581e9dba154a9831660415e0fce5503e4d](https://etherscan.io/tx/0xe7aacfcc1d50443042842246a38e54581e9dba154a9831660415e0fce5503e4d), implementations: [0x22052c592f763CA14a090D9974c5Bf9Fd3a44b8c](https://etherscan.io/address/0x22052c592f763CA14a090D9974c5Bf9Fd3a44b8c#code) - 2024-02-01 18:20 UTC, deployment of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xc7e0611b207fc226dc0412ebae0cd464b62b341c49a10a83315d916cdf527753](https://etherscan.io/tx/0xc7e0611b207fc226dc0412ebae0cd464b62b341c49a10a83315d916cdf527753), implementations: [0x31c25985E6b10CF335FC01cf9790aF4890d0505c](https://etherscan.io/address/0x31c25985E6b10CF335FC01cf9790aF4890d0505c#code) - 2024-02-01 18:20 UTC, deployment of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0x16fa9302027443ca036c06c75668cfa2bbe1d3466d67e3cf566c8227ae489bf9](https://etherscan.io/tx/0x16fa9302027443ca036c06c75668cfa2bbe1d3466d67e3cf566c8227ae489bf9), implementations: [0x23A0478996241F9f966b7054c06FdeB96Ddf3475](https://etherscan.io/address/0x23A0478996241F9f966b7054c06FdeB96Ddf3475#code) - 2024-02-01 18:20 UTC, deployment of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0x71e0cfe8fa79e241d5e216cd9956ad54c2952516293aec0b47b9a96d8ee2b061](https://etherscan.io/tx/0x71e0cfe8fa79e241d5e216cd9956ad54c2952516293aec0b47b9a96d8ee2b061), implementations: [0x1120ef11d4C3dc90Aa6BDfce16Ab049dd5d18aE0](https://etherscan.io/address/0x1120ef11d4C3dc90Aa6BDfce16Ab049dd5d18aE0#code) - 2024-02-01 18:19 UTC, deployment of [SuperchainConfig](https://etherscan.io/address/0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4#code): transaction [0x4f8242b2a2b3b4bfda92b93111cb848902636f44a632d232cdd39509074009fa](https://etherscan.io/tx/0x4f8242b2a2b3b4bfda92b93111cb848902636f44a632d232cdd39509074009fa), implementations: [0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4](https://etherscan.io/address/0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4#code) ## Updates Each date links the update on the HTML page, which also shows its contract diffs. ### [2025-09-24 08:24 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=2a201184) (high severity, 9 changes) New mint function added that can mint the gas token (FRAX) on L2. The function is permissioned by the Frax Multisig. So far they have minted 10 FRAX using this function. Those tokens seem not to be backed unless im missing something hence i asked them on tg why they added that. ### [2025-08-19 13:16 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=da5c2518) (high severity, 43 changes) L1CrossDomainMessenger updated to v2.6.0 with custom gas token. Celo already has it but there is some small unimportant [diff](https://disco.l2beat.com/diff/eth:0x807124F75FF2120b2f26D7e6f9e39C03ee9DE212/eth:0x597959A313643Ed15d45dfbCC422321E72A84515). Similar thing for the SystemConfig contract, [but](https://disco.l2beat.com/diff/eth:0x9c61C5a8FF9408B83ac92571278550097A9d2BB5/eth:0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae) (diff against celo) they kept support for the L2OutputOracle. L1StandardBridge [similar](https://disco.l2beat.com/diff/eth:0x28841965B26d41304905A836Da5C0921DA7dBB84/eth:0xe89Fbfb78920423AC9e7F06Acb2163ce55baB89f) (again against celo at the same version). The L1ERC721Bridge is fully standard. The L2OutputOracle is again nothing crazy, just new updates while keeping support for custom gas token and L2OutputOracle (diff against similar version [here](https://disco.l2beat.com/diff/eth:0x387422038358EE160aC57Dcd7aF73F9CC9401749/eth:0xd30B971922D42AA46C8A6432C332547432C89E14)). ### [2025-07-14 12:45 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=ee70dcc3) (19 changes) Discovery rerun on the same block number with only config-related changes. ### [2025-06-09 09:46 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=9da1bf64) (1 change) basefeeScalar x10. ### [2025-06-04 07:21 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=ce97dca0) (10 changes) manual withdrawal through upgrade: - [some address](https://etherscan.io/address/0x42097117dc0248cbbf9af5b27fd1a915f0766f04) tries to [withdraw](https://etherscan.io/tx/0xf92ff382faa06a0712d60dbbf30cdcb4c54118de5aec4dc8c700aba6c38aee65), [fails](https://etherscan.io/tx/0xa740813abebf99fd8c995d1ed70d68f0d9c374bd9aae332d3ab1c0a36b6e4903) - admin [upgrades the optiportal and withdraws](https://etherscan.io/tx/0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6) for them also basefeeScalar increase: together with the previous increases, we are now at 10 000 x. ### [2025-05-26 13:45 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=fa46ec98) (1 change) basefeescalar price discovery. ### [2025-05-21 12:09 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=4e74a985) (1 change) base fee increase of the blob-independent part by ~10x. post-ecotone fee calculator: https://docs.google.com/spreadsheets/d/12VIiXHaVECG2RUunDSVJpn67IQp9NHFJqUsma2PndpE/edit#gid=186414307 ### [2025-05-06 09:18 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=aad975fc) (high severity, 79 changes) Config related, see last upgrade for the analysis. pasting the description here again: Upgrade to new contracts (untemplatized). Since they have recent source code very similar to normal op stack (not fraxtal branded) and custom gas token support, this is assumed to be the latest custom gas token contracts that the op stack is officially supporting. No significant changes. ### [2025-02-08 16:13 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=7894a5fc) (1 change) Fraxtal MS single signer change. ### [2025-01-03 11:55 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=2ed82e27) (9 changes) New minter added for frxETH: The FraxEtherMinter contract forwards ETH to an EtherRouter contract which in turn supports AMOs and lending pools modularly. Permissions are the same as before and the old minter is still operational. ### [2024-08-05 05:44 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=98c8b849) (2 changes) frxETH owner transferred to a 2-day timelock. ### [2024-08-01 08:54 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=d127c12e) (11 changes) Two signers are added to frxETHMultisig. One minter is removed from frxETH, leaving frxETHMinter as the only minter. A new owner is nominated for frxETH (would transfer the ownership from frxETHMultisig to a timelock) ### [2024-05-30 11:50 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=ece636ba) (1 change) One signer of fraxtal Multisig is replaced and L2 fee calculation is switched to [post-Ecotone encoding](https://specs.optimism.io/protocol/system-config.html#ecotone-scalar-overhead-uint256uint256-change). ### [2024-05-15 13:50 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=82eb6af1) (high severity, 35 changes) #### Immutables now variable This upgrade is touching all major contracts of the rollup system, with only minor changes to immutables, identical to the [Optimism Upgrade Proposal #6: Multi-Chain Prep (MCP) L1](https://gov.optimism.io/t/upgrade-proposal-6-multi-chain-prep-mcp-l1/7677) The new implementations are code-identical to the optimism upgrade on which comments can be found in optimisms diffHistory.md under 'Diff at Fri, 12 Apr 2024 12:08:01 GMT'. Only exception is the customized OptimismPortal (FraxchainPortal) by Fraxtal. But that one has again the optimism changes, just merged. ### [2024-05-13 08:17 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=4354f662) (1 change) One signer of the frxETH Multisig is changed. ### [2024-04-03 06:51 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=8abd687b) (1 change) One signer of frxETH Multisig is changed. ### [2024-03-15 10:25 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=3fa36788) (1 change) One signer in the multisig is changed. ### [2024-03-11 13:05 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=3f58f0a9) (1 change) Update discovery to include the multisig threshold. ### [2024-03-07 15:46 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=bec43772) (4 changes) Ignored nonces, totalSupply and deposit count/root methods. ### [2024-03-06 08:24 UTC](https://l2beat.com/layer2s/projects/fraxtal?update=d1353f6d) (18 changes) Update discovery to include the multisig threshold. ## Operator ### The system has a centralized operator The operator is the only entity that can propose blocks. A live and trustworthy operator is vital to the health of the system. **Risks** - MEV can be extracted if the operator exploits their centralized position and frontruns user transactions. **References** - [L2OutputOracle.sol - source code, CHALLENGER address](https://etherscan.io/address/0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65#code) - [L2OutputOracle.sol - source code, PROPOSER address](https://etherscan.io/address/0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65#code) ### Users can force any transaction 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. **References** - [Sequencing Window - OP Mainnet Specs](https://github.com/ethereum-optimism/optimism/blob/51eeb76efeb32b3df3e978f311188aa29f5e3e94/specs/glossary.md#sequencing-window) - [OptimismPortal.sol - source code, depositTransaction function](https://etherscan.io/address/0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2#code) ## Withdrawals ### Regular messaging 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 takes a challenge period of 7d to complete. **Risks** - Funds can be frozen if the centralized validator goes down. Users cannot produce blocks themselves and exiting the system requires new block production (CRITICAL). **References** - [OptimismPortal.sol - source code, proveWithdrawalTransaction function](https://etherscan.io/address/0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2#code) - [OptimismPortal.sol - source code, finalizeWithdrawalTransaction function](https://etherscan.io/address/0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2#code) - [L2OutputOracle.sol - source code, PROPOSER check](https://etherscan.io/address/0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65#code) ### Forced messaging If the user experiences censorship from the operator with regular L2->L1 messaging they can submit their messages directly on L1. The system is then obliged to service this request or halt all messages, including forced withdrawals from L1 and regular messages initiated on L2. Once the force operation is submitted and if the request is serviced, the operation follows the flow of a regular message. **References** - [Forced withdrawal from an OP Stack blockchain](https://docs.optimism.io/stack/transactions/forced-transaction) ## Other considerations ### EVM compatible smart contracts are supported OP stack chains are pursuing the EVM Equivalence model. No changes to smart contracts are required regardless of the language they are written in, i.e. anything deployed on L1 can be deployed on L2. **References** - [Introducing EVM Equivalence](https://medium.com/ethereum-optimism/introducing-evm-equivalence-5c2021deb306) ## Permissions Explore these contracts and permissions in Disco, L2BEAT's contract explorer: https://disco.l2beat.com/ui/p/fraxtal ### Ethereum #### Actors ##### Fraxtal Multisig 1 Addresses: [0xe0d7755252873c4eF5788f7f45764E0e17610508](https://etherscan.io/address/0xe0d7755252873c4eF5788f7f45764E0e17610508) A Multisig with 3/5 threshold. - Can upgrade **with no delay** - OptimismMintableERC20Factory [via: ProxyAdmin] - L1CrossDomainMessenger [via: ProxyAdmin] - SystemConfig [via: ProxyAdmin] - L1StandardBridge [via: ProxyAdmin] - OptimismPortal [via: ProxyAdmin] - SuperchainConfig [via: ProxyAdmin] - L2OutputOracle [via: ProxyAdmin] - L1ERC721Bridge [via: ProxyAdmin] - Can interact with SystemConfig - it can update the preconfer address, the batch submitter (Sequencer) address and the gas configuration of the system - Can interact with OptimismPortal - Allowed to pause withdrawals. In op stack systems with a proof system, the Guardian can also blacklist dispute games and set the respected game type (permissioned / permissionless) - Can interact with SuperchainConfig - Allowed to pause withdrawals. In op stack systems with a proof system, the Guardian can also blacklist dispute games and set the respected game type (permissioned / permissionless) - Can interact with L2OutputOracle - Allowed to challenge or delete state roots proposed by a Proposer - Can interact with AddressManager - set and change address mappings [via: ProxyAdmin] Participants (5): [0x8da4E997e051605878c9C0B793c496556EACC2C0](https://etherscan.io/address/0x8da4E997e051605878c9C0B793c496556EACC2C0), [0x6e74053a3798e0fC9a9775F7995316b27f21c4D2](https://etherscan.io/address/0x6e74053a3798e0fC9a9775F7995316b27f21c4D2), [0x6933BCC3e96f1C4d2cb73Cb391d854b18Ab7A4F2](https://etherscan.io/address/0x6933BCC3e96f1C4d2cb73Cb391d854b18Ab7A4F2), [0x17e06ce6914E3969f7BD37D8b2a563890cA1c96e](https://etherscan.io/address/0x17e06ce6914E3969f7BD37D8b2a563890cA1c96e), [0xcbc616D595D38483e6AdC45C7E426f44bF230928](https://etherscan.io/address/0xcbc616D595D38483e6AdC45C7E426f44bF230928) ##### Fraxtal Multisig 2 Addresses: [0xB1748C79709f4Ba2Dd82834B8c82D4a505003f27](https://etherscan.io/address/0xB1748C79709f4Ba2Dd82834B8c82D4a505003f27) A Multisig with 3/5 threshold. - Can interact with OptimismPortal - can increase the gas token balance assigned to the OptimismPortal and mint the gas token on L2 without actually depositing tokens - Can interact with Frax Ether Token - can add and remove frxETH minters and set a new timelock address **with 2d delay** [via: FrxEthTimelock with 2d delay] - Can interact with frxETH Minter - can withdraw all escrowed ETH, pause the contract and set user fees for minting frxETH (`submit()`) **with 2d delay** [via: FrxEthTimelock with 2d delay] Participants (5): [0x6933BCC3e96f1C4d2cb73Cb391d854b18Ab7A4F2](https://etherscan.io/address/0x6933BCC3e96f1C4d2cb73Cb391d854b18Ab7A4F2), [0xcbc616D595D38483e6AdC45C7E426f44bF230928](https://etherscan.io/address/0xcbc616D595D38483e6AdC45C7E426f44bF230928), [0x17e06ce6914E3969f7BD37D8b2a563890cA1c96e](https://etherscan.io/address/0x17e06ce6914E3969f7BD37D8b2a563890cA1c96e), [0xc8dE9f45601DA8C76158b8CAF3E56E8A037F2228](https://etherscan.io/address/0xc8dE9f45601DA8C76158b8CAF3E56E8A037F2228), [0x6e74053a3798e0fC9a9775F7995316b27f21c4D2](https://etherscan.io/address/0x6e74053a3798e0fC9a9775F7995316b27f21c4D2) ##### frxETH Minter (0x7Bc6…0cA3) Addresses: [0x7Bc6bad540453360F744666D625fec0ee1320cA3](https://etherscan.io/address/0x7Bc6bad540453360F744666D625fec0ee1320cA3) Accepts user-supplied ETH to convert it to frxETH using auxiliary contracts like the EtherRouter. - Can interact with Frax Ether Token - can mint frxETH tokens ##### Frax Multisig Addresses: [0x8306300ffd616049FD7e4b0354a64Da835c1A81C](https://etherscan.io/address/0x8306300ffd616049FD7e4b0354a64Da835c1A81C) A Multisig with 4/7 threshold. - Can interact with EtherRouter - set the default AMO and lending pool contracts among the registered ones and trigger the predefined rebalancing functions of the router - withdraw all escrowed ETH and ERC-20s and configure important addresses like the operator, AMO(s) or the lending pool(s) - Can interact with frxETH Minter - configure important addresses like the operator or the EtherRouter and withdraw ETH and ERC-20s from the contract (usually not escrowed here) - pause ETH deposits / frxETH mints and withdraw ETH and ERC-20s from the contract (usually not escrowed here) Participants (7): [0x381e2495e683868F693AA5B1414F712f21d34b40](https://etherscan.io/address/0x381e2495e683868F693AA5B1414F712f21d34b40), [0xc8dE9f45601DA8C76158b8CAF3E56E8A037F2228](https://etherscan.io/address/0xc8dE9f45601DA8C76158b8CAF3E56E8A037F2228), [0xcbc616D595D38483e6AdC45C7E426f44bF230928](https://etherscan.io/address/0xcbc616D595D38483e6AdC45C7E426f44bF230928), [0xc28339c70054bC22255A74E927a0B9e9A475F224](https://etherscan.io/address/0xc28339c70054bC22255A74E927a0B9e9A475F224), [0x6933BCC3e96f1C4d2cb73Cb391d854b18Ab7A4F2](https://etherscan.io/address/0x6933BCC3e96f1C4d2cb73Cb391d854b18Ab7A4F2), [0x8da4E997e051605878c9C0B793c496556EACC2C0](https://etherscan.io/address/0x8da4E997e051605878c9C0B793c496556EACC2C0), [0x6e74053a3798e0fC9a9775F7995316b27f21c4D2](https://etherscan.io/address/0x6e74053a3798e0fC9a9775F7995316b27f21c4D2) ##### frxETH Minter (0xbAFA…1138) Addresses: [0xbAFA44EFE7901E04E39Dad13167D089C559c1138](https://etherscan.io/address/0xbAFA44EFE7901E04E39Dad13167D089C559c1138) Accepts user-supplied ETH and converts it to frxETH. - Can interact with Frax Ether Token - can mint frxETH tokens ##### EOA 1 Addresses: [0xFb90465f3064fF63FC460F01A6307eC73d64bc50](https://etherscan.io/address/0xFb90465f3064fF63FC460F01A6307eC73d64bc50) - Can interact with L2OutputOracle - Allowed to post new state roots of the current layer to the host chain ##### EOA 2 Addresses: [0x6017f75108f251a488B045A7ce2a7C15b179d1f2](https://etherscan.io/address/0x6017f75108f251a488B045A7ce2a7C15b179d1f2) - Can interact with SystemConfig - Allowed to commit transactions from the current layer to the host chain ## Smart contracts ![A diagram of the smart contract architecture](https://l2beat.com/static/images/architecture/opstack-optimium-superchain.7cf8cc96.png) Explore these contracts and permissions in Disco, L2BEAT's contract explorer: https://disco.l2beat.com/ui/p/fraxtal ### Ethereum #### SystemConfig Addresses: [0x34a9f273cbD847d49c3De015FC26c3E66825f8b2](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code), [0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae](https://etherscan.io/address/0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) **Past upgrades** (Count of upgrades: 6, Last upgrade: 1y 1mo ago, Avg upgrade interval: 4mo 21d) - 2025-08-18 19:16 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae](https://etherscan.io/address/0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0xbF9d1CDF02720b50254e0ca70f01ffE4C9d82bae)) - 2025-04-29 19:05 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D](https://etherscan.io/address/0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0xB58D3b8F88AC9234dc2329D0fb1197B0c381446D)) - 2024-05-14 20:13 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367](https://etherscan.io/address/0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367#code) ([diff](https://disco.l2beat.com/diff/eth:0x22052c592f763CA14a090D9974c5Bf9Fd3a44b8c/eth:0x4D7A1a16d0DA89B50FBd8b524508FC393A6Dc367)) - 2024-02-01 18:20 UTC, deployment of [SystemConfig](https://etherscan.io/address/0x34a9f273cbD847d49c3De015FC26c3E66825f8b2#code): transaction [0xe7aacfcc1d50443042842246a38e54581e9dba154a9831660415e0fce5503e4d](https://etherscan.io/tx/0xe7aacfcc1d50443042842246a38e54581e9dba154a9831660415e0fce5503e4d), implementations: [0x22052c592f763CA14a090D9974c5Bf9Fd3a44b8c](https://etherscan.io/address/0x22052c592f763CA14a090D9974c5Bf9Fd3a44b8c#code) Contains configuration parameters such as the Sequencer address, gas limit on this chain and the unsafe block signer address. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 - **batcherHash**: EOA 2 - **owner**: Fraxtal Multisig 1 Can be upgraded by: Fraxtal Multisig 1 with no delay #### OptimismPortal (escrow) Addresses: [0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code), [0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2](https://etherscan.io/address/0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) **Past upgrades** (Count of upgrades: 9, Last upgrade: 1y ago, Avg upgrade interval: 3mo 8d) - 2025-09-22 19:07 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xf2882d571b3a770d737ce0b81adb738b116e94a1d16f19a9cc837fdc20b25f05](https://etherscan.io/tx/0xf2882d571b3a770d737ce0b81adb738b116e94a1d16f19a9cc837fdc20b25f05), implementations: [0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2](https://etherscan.io/address/0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0xDe882c2CBd6e790a35Cc63BA25eCA7b7DDd234B2)) - 2025-08-18 19:16 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0xd30B971922D42AA46C8A6432C332547432C89E14/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0xd30B971922D42AA46C8A6432C332547432C89E14](https://etherscan.io/address/0xd30B971922D42AA46C8A6432C332547432C89E14#code) ([diff](https://disco.l2beat.com/diff/eth:0xcA11bde05977b3631167028862bE2a173976CA11/eth:0xd30B971922D42AA46C8A6432C332547432C89E14)) - 2025-06-02 20:28 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6](https://etherscan.io/tx/0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6), implementations: [0xcA11bde05977b3631167028862bE2a173976CA11](https://etherscan.io/address/0xcA11bde05977b3631167028862bE2a173976CA11#code) ([diff](https://disco.l2beat.com/diff/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f/eth:0xcA11bde05977b3631167028862bE2a173976CA11)) - 2025-06-02 20:28 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6](https://etherscan.io/tx/0xdca2297bd52b872499233c5e6605707a70a21ebd0d617b3f565c084fc4a775b6), implementations: [0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f](https://etherscan.io/address/0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f)) - 2025-04-29 19:05 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f](https://etherscan.io/address/0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0x553D60F9D5912e2ba9C3133550BC8eA551Fb0c0f)) - 2024-05-14 20:13 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23](https://etherscan.io/address/0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23#code) ([diff](https://disco.l2beat.com/diff/eth:0x59B6903044Fa9439a5D621D3605789A6E654b1D6/eth:0x47Ec03B67ba4f3C71a4320D2947f2173E0B45a23)) - 2024-02-01 18:20 UTC, deployment of [OptimismPortal](https://etherscan.io/address/0x36cb65c1967A0Fb0EEE11569C51C2f2aA1Ca6f6D#code): transaction [0xe7e33bcdd2dd085bcd43e933aefa52eeffb6a4656facdfae956eba8bfe2f537b](https://etherscan.io/tx/0xe7e33bcdd2dd085bcd43e933aefa52eeffb6a4656facdfae956eba8bfe2f537b), implementations: [0x59B6903044Fa9439a5D621D3605789A6E654b1D6](https://etherscan.io/address/0x59B6903044Fa9439a5D621D3605789A6E654b1D6#code) The main entry point to deposit funds from host chain to this chain. It also allows to prove and finalize withdrawals. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 - **frax_comptroller**: Fraxtal Multisig 2 - **guardian**: Fraxtal Multisig 1 The following tokens are included in the value secured calculation: ETH, frxETH, FRAX Can be upgraded by: Fraxtal Multisig 1 with no delay #### L2OutputOracle Addresses: [0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code), [0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65](https://etherscan.io/address/0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) **Past upgrades** (Count of upgrades: 3, Last upgrade: 2y 5mo ago, Avg upgrade interval: 8mo 7d) - 2024-05-14 20:13 UTC, upgrade of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65](https://etherscan.io/address/0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65#code) ([diff](https://disco.l2beat.com/diff/eth:0x84c2f365733c6560bd49D8768d9c23B07A9DD630/eth:0x6f3CcC8C9DAf8B9b39aDe481213Ff7A626a42B65)) - 2024-02-02 23:44 UTC, upgrade of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0x3b6b6b8395ca0242ffaf46aba40335b8dce65cab470d7a188a3afe13723ee3db](https://etherscan.io/tx/0x3b6b6b8395ca0242ffaf46aba40335b8dce65cab470d7a188a3afe13723ee3db), implementations: [0x84c2f365733c6560bd49D8768d9c23B07A9DD630](https://etherscan.io/address/0x84c2f365733c6560bd49D8768d9c23B07A9DD630#code) ([diff](https://disco.l2beat.com/diff/eth:0xA30ADd78D5be6B2B55C934666bb4fF2C4429d800/eth:0x84c2f365733c6560bd49D8768d9c23B07A9DD630)) - 2024-02-01 18:20 UTC, deployment of [L2OutputOracle](https://etherscan.io/address/0x66CC916Ed5C6C2FA97014f7D1cD141528Ae171e4#code): transaction [0xda02c330c54f6dc923beb0d9f720a4caaae75238f52d24902d56624b0410a65b](https://etherscan.io/tx/0xda02c330c54f6dc923beb0d9f720a4caaae75238f52d24902d56624b0410a65b), implementations: [0xA30ADd78D5be6B2B55C934666bb4fF2C4429d800](https://etherscan.io/address/0xA30ADd78D5be6B2B55C934666bb4fF2C4429d800#code) Contains a list of proposed state roots which Proposers assert to be a result of block execution. Currently only the PROPOSER address can submit new state roots. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 - **challenger**: Fraxtal Multisig 1 - **proposer**: EOA 1 Can be upgraded by: Fraxtal Multisig 1 with no delay #### SuperchainConfig Addresses: [0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4](https://etherscan.io/address/0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4#code), [0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4](https://etherscan.io/address/0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) **Past upgrades** (Count of upgrades: 2, Last upgrade: 2y 8mo ago, Avg upgrade interval: 10mo 29d) - 2024-02-02 23:44 UTC, upgrade of [SuperchainConfig](https://etherscan.io/address/0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4#code): transaction [0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644](https://etherscan.io/tx/0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644), implementations: [0xb851fc304fCa88EDC89C287687AF4F6d7810bc14](https://etherscan.io/address/0xb851fc304fCa88EDC89C287687AF4F6d7810bc14#code) ([diff](https://disco.l2beat.com/diff/eth:0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4/eth:0xb851fc304fCa88EDC89C287687AF4F6d7810bc14)) - 2024-02-02 23:44 UTC, upgrade of [SuperchainConfig](https://etherscan.io/address/0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4#code): transaction [0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644](https://etherscan.io/tx/0xedefc1fc192d3c59892b11660cf6dc47d120a7e895adc2cd4dba0d97efec9644), implementations: [0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4](https://etherscan.io/address/0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4#code) ([diff](https://disco.l2beat.com/diff/eth:0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4/eth:0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4)) - 2024-02-01 18:19 UTC, deployment of [SuperchainConfig](https://etherscan.io/address/0x61ca43CB037aC9181d8Fa5CD0073dC314065Ccc4#code): transaction [0x4f8242b2a2b3b4bfda92b93111cb848902636f44a632d232cdd39509074009fa](https://etherscan.io/tx/0x4f8242b2a2b3b4bfda92b93111cb848902636f44a632d232cdd39509074009fa), implementations: [0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4](https://etherscan.io/address/0x0d9C39c64CF8eDA1EdFeBD78AFa895bAA797eFc4#code) This is NOT the shared SuperchainConfig contract of the OP stack Superchain but rather a local fork. It manages the `PAUSED_SLOT`, a boolean value indicating whether the local chain is paused, and `GUARDIAN_SLOT`, the address of the guardian which can pause and unpause the system. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 - **guardian**: Fraxtal Multisig 1 Can be upgraded by: Fraxtal Multisig 1 with no delay #### L1CrossDomainMessenger Addresses: [0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code), [0x597959A313643Ed15d45dfbCC422321E72A84515](https://etherscan.io/address/0x597959A313643Ed15d45dfbCC422321E72A84515#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) **Past upgrades** (Count of upgrades: 6, Last upgrade: 1y 1mo ago, Avg upgrade interval: 4mo 21d) - 2025-08-18 19:16 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x597959A313643Ed15d45dfbCC422321E72A84515/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x597959A313643Ed15d45dfbCC422321E72A84515](https://etherscan.io/address/0x597959A313643Ed15d45dfbCC422321E72A84515#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0x597959A313643Ed15d45dfbCC422321E72A84515)) - 2025-04-29 19:05 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618](https://etherscan.io/address/0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0xC08f08571Ea50EDaA1F71Fd6d72a68d164B0C618)) - 2024-05-14 20:13 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8](https://etherscan.io/address/0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8#code) ([diff](https://disco.l2beat.com/diff/eth:0x31c25985E6b10CF335FC01cf9790aF4890d0505c/eth:0xC6e4ECE5576dC96846bb11eD8910f3dF3CE516b8)) - 2024-02-01 18:20 UTC, deployment of [L1CrossDomainMessenger](https://etherscan.io/address/0x126bcc31Bc076B3d515f60FBC81FddE0B0d542Ed#code): transaction [0xc7e0611b207fc226dc0412ebae0cd464b62b341c49a10a83315d916cdf527753](https://etherscan.io/tx/0xc7e0611b207fc226dc0412ebae0cd464b62b341c49a10a83315d916cdf527753), implementations: [0x31c25985E6b10CF335FC01cf9790aF4890d0505c](https://etherscan.io/address/0x31c25985E6b10CF335FC01cf9790aF4890d0505c#code) Sends messages from host chain to this chain, and relays messages back onto host chain. In the event that a message sent from host chain to this chain is rejected for exceeding this chain's epoch gas limit, it can be resubmitted via this contract's replay function. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 Can be upgraded by: Fraxtal Multisig 1 with no delay #### L1StandardBridge (escrow) Addresses: [0x34C0bD5877A5Ee7099D0f5688D65F4bB9158BDE2](https://etherscan.io/address/0x34C0bD5877A5Ee7099D0f5688D65F4bB9158BDE2#code), [0xe89Fbfb78920423AC9e7F06Acb2163ce55baB89f](https://etherscan.io/address/0xe89Fbfb78920423AC9e7F06Acb2163ce55baB89f#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) The main entry point to deposit ERC20 tokens from host chain to this chain. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 All supported tokens in this escrow are included in the value secured calculation. Can be upgraded by: Fraxtal Multisig 1 with no delay #### L1ERC721Bridge Addresses: [0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code), [0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878](https://etherscan.io/address/0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) **Past upgrades** (Count of upgrades: 6, Last upgrade: 1y 1mo ago, Avg upgrade interval: 4mo 21d) - 2025-08-18 19:16 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2025-08-18 19:16 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4](https://etherscan.io/tx/0xcef51688ce9d56f2d4d2fe47ac74dcb8e75abb9ee886cc1416c4293f68dbfcb4), implementations: [0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878](https://etherscan.io/address/0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878#code) ([diff](https://disco.l2beat.com/diff/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129/eth:0x7B07f9FE593Ab0b035B2dce1e925A77F57B3b878)) - 2025-04-29 19:05 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0x7eecF36F384732F229D494E072a48fF294861fC2/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x7eecF36F384732F229D494E072a48fF294861fC2](https://etherscan.io/address/0x7eecF36F384732F229D494E072a48fF294861fC2#code) ([diff](https://disco.l2beat.com/diff/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A/eth:0x7eecF36F384732F229D494E072a48fF294861fC2)) - 2024-05-14 20:13 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A](https://etherscan.io/address/0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A#code) ([diff](https://disco.l2beat.com/diff/eth:0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4/eth:0x7a6b7F35D032c9b122C69F01EA4523e028f6ef4A)) - 2024-05-14 20:13 UTC, upgrade of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669](https://etherscan.io/tx/0x25f146ab6043f07c95e3b314e0200d2b5a8a0cb590cbcd9f094f753efef7d669), implementations: [0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4](https://etherscan.io/address/0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4#code) ([diff](https://disco.l2beat.com/diff/eth:0x23A0478996241F9f966b7054c06FdeB96Ddf3475/eth:0x7eE1637C33Ed0DFEE6403f3301B6d404106018e4)) - 2024-02-01 18:20 UTC, deployment of [L1ERC721Bridge](https://etherscan.io/address/0xa9B5Fb84B7aeAF0D51C95DB04a76B1D4738D0eC5#code): transaction [0x16fa9302027443ca036c06c75668cfa2bbe1d3466d67e3cf566c8227ae489bf9](https://etherscan.io/tx/0x16fa9302027443ca036c06c75668cfa2bbe1d3466d67e3cf566c8227ae489bf9), implementations: [0x23A0478996241F9f966b7054c06FdeB96Ddf3475](https://etherscan.io/address/0x23A0478996241F9f966b7054c06FdeB96Ddf3475#code) Used to bridge ERC-721 tokens from host chain to this chain. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 Can be upgraded by: Fraxtal Multisig 1 with no delay #### OptimismMintableERC20Factory Addresses: [0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code), [0x72D205182538207478dA7baFf0181884993D279A](https://etherscan.io/address/0x72D205182538207478dA7baFf0181884993D279A#code) (Implementation (Upgradable)), [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) (Admin) **Past upgrades** (Count of upgrades: 3, Last upgrade: 1y 5mo ago, Avg upgrade interval: 8mo 7d) - 2025-04-29 19:05 UTC, upgrade of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x87520f4104878c7dcda3E9296B572A5fe034E129](https://etherscan.io/address/0x87520f4104878c7dcda3E9296B572A5fe034E129#code) ([diff](https://disco.l2beat.com/diff/eth:0x72D205182538207478dA7baFf0181884993D279A/eth:0x87520f4104878c7dcda3E9296B572A5fe034E129)) - 2025-04-29 19:05 UTC, upgrade of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e](https://etherscan.io/tx/0xf1f2d8c52f1e2303dad74c3c2ee9c72ac4935bc5efbedc95ab52036e80133d1e), implementations: [0x72D205182538207478dA7baFf0181884993D279A](https://etherscan.io/address/0x72D205182538207478dA7baFf0181884993D279A#code) ([diff](https://disco.l2beat.com/diff/eth:0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876/eth:0x72D205182538207478dA7baFf0181884993D279A)) - 2024-02-19 16:52 UTC, upgrade of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0x105f432213e819e064f46a07b935289add9f1139c9c91db7fd45d0f6fe213b1f](https://etherscan.io/tx/0x105f432213e819e064f46a07b935289add9f1139c9c91db7fd45d0f6fe213b1f), implementations: [0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876](https://etherscan.io/address/0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876#code) ([diff](https://disco.l2beat.com/diff/eth:0x1120ef11d4C3dc90Aa6BDfce16Ab049dd5d18aE0/eth:0x6cA98f43719231d38F6426DB64C7F3D5C7CE7876)) - 2024-02-01 18:20 UTC, deployment of [OptimismMintableERC20Factory](https://etherscan.io/address/0x11FE3be54aC01C13Dd985cE2BdD10eD77e1376cc#code): transaction [0x71e0cfe8fa79e241d5e216cd9956ad54c2952516293aec0b47b9a96d8ee2b061](https://etherscan.io/tx/0x71e0cfe8fa79e241d5e216cd9956ad54c2952516293aec0b47b9a96d8ee2b061), implementations: [0x1120ef11d4C3dc90Aa6BDfce16Ab049dd5d18aE0](https://etherscan.io/address/0x1120ef11d4C3dc90Aa6BDfce16Ab049dd5d18aE0#code) A helper contract that generates OptimismMintableERC20 contracts on the network it's deployed to. OptimismMintableERC20 is a standard extension of the base ERC20 token contract designed to allow the L1StandardBridge contracts to mint and burn tokens. This makes it possible to use an OptimismMintableERC20 as this chain's representation of a token on the host chain, or vice-versa. - Roles: - **admin**: ProxyAdmin; ultimately Fraxtal Multisig 1 Can be upgraded by: Fraxtal Multisig 1 with no delay #### ProxyAdmin Addresses: [0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA](https://etherscan.io/address/0x13Fe62cB24aEa5afd179F20D362c056c3881ABcA#code) - Roles: - **owner**: Fraxtal Multisig 1 #### Frax (prev. FXS) Token Addresses: [0x3432B6A60D23Ca0dFCa7761B7ab56459D9C964D0](https://etherscan.io/address/0x3432B6A60D23Ca0dFCa7761B7ab56459D9C964D0#code) #### EtherRouter Addresses: [0x5acAf61d339dd123e60ba450Ea38fbC49445007C](https://etherscan.io/address/0x5acAf61d339dd123e60ba450Ea38fbC49445007C#code) ETH deposited by users via the FraxEtherMinter is forwarded to this contract and then routed further to either lending pools or AMOs. - Roles: - **operatorAddress**: Frax Multisig - **timelockAddress**: Frax Multisig #### Frax Ether Token Addresses: [0x5E8422345238F34275888049021821E8E08CAa1f](https://etherscan.io/address/0x5E8422345238F34275888049021821E8E08CAa1f#code) frxETH token contract. Fraxtal uses Frax Ether as the designated gas token, allowing users to pay for blockspace with frxETH. - Roles: - **minters_array**: frxETH Minter - **timelock_address**: FrxEthTimelock; ultimately Fraxtal Multisig 2 #### FrxEthTimelock Addresses: [0x8412ebf45bAC1B340BbE8F318b928C466c4E39CA](https://etherscan.io/address/0x8412ebf45bAC1B340BbE8F318b928C466c4E39CA#code) Allows for time-delayed execution of transactions. Current delay is 2d. - Roles: - **admin**: Fraxtal Multisig 2 #### Staked Frax Ether Token Addresses: [0xac3E018457B222d93114458476f3E3416Abbe38F](https://etherscan.io/address/0xac3E018457B222d93114458476f3E3416Abbe38F#code) Vault token contract (ERC-4626) for staked frxETH. The smart contract receives frxETH tokens and mints sfrxETH tokens. The current deployment carries some associated risks: - Funds can be stolen if a contract receives a malicious code upgrade. There is no delay on code upgrades (CRITICAL).