Search

Search for projects by name or address

SummaryValue SecuredActivityOnchain costsData postedLivenessMilestones & IncidentsRisk summaryRisk analysisStageData availabilityState validationUpgrades & GovernanceUpdatesOperatorWithdrawalsOther considerationsPermissionsSmart contracts

Optopia logo
Optopia

This project is archived and no longer maintained.

Badges

About

Optopia is an OP stack Rollup on Ethereum focusing on the intersection of AI, Intents and DeFi.

  • Total Value SecuredTVS
    $0.000.00%
  • Past day UOPSDaily UOPS
    No data
  • Gas token
    ETH
  • Type
    Other
  • Purposes
    Universal, AI
  • Chain ID
    62050

    • Tokens breakdown

    Sequencer failureState validationData availabilityExit windowProposer failure
    Explore more in Discovery UI

    Badges

    About

    Optopia is an OP stack Rollup on Ethereum focusing on the intersection of AI, Intents and DeFi.

    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.

    Learn more about the recategorisation here.

    Value SecuredView TVS breakdown
    Total
    Canonically BridgedCanonically Bridged ValueCanonical
    Natively MintedNatively Minted TokensNative
    Externally BridgedExternally Bridged ValueExternal
    ETH & derivatives
    Stablecoins
    BTC & derivatives
    Other
    View TVS breakdown
    Activity

    2024 May 10 — 2026 Jun 24

    Past Day UOPS
    <0.0198.1%
    Past Day Ops count
    1
    Max. UOPS
    1.02
    2024 Aug 19
    Past day UOPS/TPS Ratio
    No data
    Onchain costs

    The section shows the operating costs that L2s pay to Ethereum.

    2024 May 10 — 2026 Jun 24

    Total cost
    $27.92 K
    Avg cost per L2 UOP
    $0.022507
    Avg cost per day
    $45.48
    Data posted

    This section shows how much data the project publishes to its data-availability (DA) layer over time. The project currently posts data toEthereumEthereum.

    2024 May 10 — 2026 Jun 24

    Data posted
    2.06 GiB
    Avg size per day
    3.61 MiB
    Avg size per L2 UOP
    1.74 KiB
    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.

    2024 May 10 — 2026 Jun 25

    Avg. tx data subs. interval
    49 minutes
    Avg. state updates interval
    2 hours
    Milestones & Incidents

    Mainnet Launch

    2024 May 21st

    Optopia is live on mainnet.

    Learn more
    Risk summary
    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 frozen if

    1. the centralized validator goes down. Users cannot produce blocks themselves and exiting the system requires new block production (CRITICAL).

    MEV can be extracted if

    1. the operator exploits their centralized position and frontruns user transactions.
    Risk analysis
    Fraud proof system is currently under development. Users need to trust the block proposer to submit correct L1 state roots.
    Sequencer failureState validationData availabilityExit windowProposer failure
    Sequencer failure
    Self sequence

    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

    Currently the system permits invalid state roots. More details in project overview.

    Data availability
    Onchain

    All of the data needed for proof construction is published on Ethereum L1.

    Exit window
    None

    There is no window for users to exit in case of an unwanted upgrade since contracts are instantly upgradable.

    Proposer failure
    Cannot withdraw

    Only the whitelisted proposers can publish state roots on L1, so in the event of failure the withdrawals are frozen.

    Stage
    Optopia
    Optopia is not even a
    Stage 0
    project.
    Learn more about 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

    All data required for proofs is published on chain

    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.

    1. Derivation: Batch submission - OP Mainnet specs
    2. BatchInbox - address
    3. OptimismPortal.sol - source code, depositTransaction function
    Learn more about the DA layer here: Ethereum logoEthereum
    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.

    • Funds can be stolen if an invalid state root is submitted to the system (CRITICAL).

    1. L2OutputOracle.sol - source code, deleteL2Outputs function
    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
    7
    Last upgrade
    5mo 9d ago
    Avg upgrade interval
    5mo 22d
    Updates
    2026 January 16, 13:25 UTC
    High severity
    34changes

    Project archived. L1StandardBridge upgraded with a custom withdraw() function allowing the guardian EOA ( 0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE ) to withdraw any tokens from the bridge. OptimismPortal has a similar addition for native ETH. Conduit Multisig 1 also added a new signer (10 → 11 members). Diff links: - L1StandardBridge diff - OptimismPortal diff

    Project archived. L1StandardBridge upgraded with a custom withdraw() function allowing the guardian EOA (0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE) to withdraw any tokens from the bridge. OptimismPortal has a similar addition for native ETH.

    Conduit Multisig 1 also added a new signer (10 → 11 members).

    Diff links:

    contract ProxyAdmin (eth:0x161aF05fA6BdA1c6E7Ee12839d470931bA796948) {
    +++ description: None
    directlyReceivedPermissions.2.role:
    - ".$admin"
    + "admin"
    directlyReceivedPermissions.2.description:
    - "upgrading the bridge implementation can give access to all funds escrowed therein."
    }
    contract L1StandardBridge (eth:0x1adE86B9cc8a50Db747b7aaC32E8527d42c71fC1) {
    +++ description: None
    template:
    - "opstack/L1StandardBridge"
    sourceHashes.1:
    - "0x1010ff7f40ab4d53e6d9996aefa04423dabe9d0e22fac2d02b330ed3aa2c5740"
    + "0x710fc3f6ed40ea4a5162760cb3c7201edd6bdc10b1462da5f27b5dc809a532db"
    description:
    - "The main entry point to deposit ERC20 tokens from host chain to this chain."
    values.$implementation:
    - "eth:0x4f30C8A322ab6f84F15B8955B58D295E138B14Ca"
    + "eth:0x347603566c9f79AC5f28a440B8d6A111A1672FB5"
    values.guardian:
    + "eth:0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE"
    implementationNames.eth:0x4f30C8A322ab6f84F15B8955B58D295E138B14Ca:
    - "L1StandardBridge"
    implementationNames.eth:0x347603566c9f79AC5f28a440B8d6A111A1672FB5:
    + "L1StandardBridge"
    category:
    - {"name":"Canonical Bridges","priority":2}
    }
    contract Optopia Multisig (eth:0x2C73A1610EE822a8C2C21eddd455e725A3334c8C) {
    +++ description: None
    receivedPermissions.2.role:
    - ".$admin"
    + "admin"
    receivedPermissions.2.description:
    - "upgrading the bridge implementation can give access to all funds escrowed therein."
    }
    contract OptimismPortal (eth:0x39A90926306E11497EC5FE1C459910258B620edD) {
    +++ description: None
    template:
    - "opstack/OptimismPortal"
    sourceHashes.1:
    - "0xe35fb7bc0433439337b3eadda3d6fb7991918162f62a337a695e8c7f948cdd35"
    + "0x94485995648eb1348d02f16b00f8be4872ab3d1da83d8ebb27b4cd2bf8bad0b3"
    description:
    - "The main entry point to deposit funds from host chain to this chain. It also allows to prove and finalize withdrawals."
    values.$implementation:
    - "eth:0xFe9B3d40DB0ec8f97D9ea638e926b3aEED8cF29B"
    + "eth:0xB22519CD5e46F5FC8809735F06E256A415777C31"
    values.$pastUpgrades.5:
    + ["2026-01-16T09:30:59.000Z","0xcf79a0cec877055337c9fc44e55d7372af7fd4d426feb3b1cfc3c963c7f006e3",["eth:0xB22519CD5e46F5FC8809735F06E256A415777C31"]]
    values.$upgradeCount:
    - 5
    + 6
    values.params.prevBoughtGas:
    - 491822
    + 490798
    values.params.prevBlockNum:
    - 22521705
    + 24174890
    implementationNames.eth:0xFe9B3d40DB0ec8f97D9ea638e926b3aEED8cF29B:
    - "OptimismPortal"
    implementationNames.eth:0xB22519CD5e46F5FC8809735F06E256A415777C31:
    + "OptimismPortal"
    category:
    - {"name":"Local Infrastructure","priority":5}
    }
    EOA (eth:0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE) {
    +++ description: None
    receivedPermissions.2:
    - {"permission":"guard","from":"eth:0x39A90926306E11497EC5FE1C459910258B620edD","role":".guardian"}
    receivedPermissions.3:
    - {"permission":"guard","from":"eth:0x39A90926306E11497EC5FE1C459910258B620edD","role":".GUARDIAN"}
    }
    2024 November 14, 09:02 UTC
    High severity
    14changes

    Upgrade L2OutputOracle to a beta version (minor changes).

    Upgrade L2OutputOracle to a beta version (minor changes).

    contract L2OutputOracle (0xdd80E05004f40815EaEf12ffeE69c2a8A5112aA5) {
    +++ description: 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.
    sourceHashes.1:
    - "0x025c187b0231be4785898f25f98d749f953f5d06781772aef242812e2ecf52e3"
    + "0x82ce2b4d2c7dcca833593de12c2cf9aef63b23af286529708131f3aa909484ce"
    values.$implementation:
    - "0x38f2D861b23866b92188155C4876F0879cA706Ec"
    + "0xDe94ECc695F2Df967b49ED11829eC9f7c1831a61"
    values.$pastUpgrades.2:
    + ["2024-11-12T05:33:23.000Z","0x205d623832f5a7d959f55aac33cae361475b2abfd69ca37c8eec2bd510276c3f",["0xDe94ECc695F2Df967b49ED11829eC9f7c1831a61"]]
    values.$pastUpgrades.1:
    + ["2024-11-12T03:33:47.000Z","0xe56f6658e706a93ca4aa13817ca9316ae594f08268d7dbada461427b4f55756c",["0xfc2Af8738f04d14833BBcE3AD446F603E91D9306"]]
    values.$upgradeCount:
    - 1
    + 3
    values.SUBMISSION_INTERVAL:
    - 1800
    + 18000
    values.submissionInterval:
    - 1800
    + 18000
    values.version:
    - "1.8.0"
    + "1.8.1-beta.2"
    }
    2024 July 31, 15:12 UTC
    11changes

    Initial discovery: OP stack rollup with superchain fork.

    Initial discovery: OP stack rollup with superchain fork.

    Initial discovery

    + Status: CREATED
    contract AddressManager (0x039A3B4AF85A91626f428b8B881603b6DD1f6C4C)
    +++ description: None
    + Status: CREATED
    contract L1CrossDomainMessenger (0x03D5bc58E7b7E13ba785F67AFA2d2fC49cB2BdF3)
    +++ description: 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.
    + Status: CREATED
    contract ProxyAdmin (0x161aF05fA6BdA1c6E7Ee12839d470931bA796948)
    +++ description: It can upgrade the bridge implementation potentially gaining access to all funds, and change any system component.
    + Status: CREATED
    contract L1StandardBridge (0x1adE86B9cc8a50Db747b7aaC32E8527d42c71fC1)
    +++ description: The main entry point to deposit ERC20 tokens from host chain to this chain. This contract can store any token.
    + Status: CREATED
    contract Optopia Multisig (0x2C73A1610EE822a8C2C21eddd455e725A3334c8C)
    +++ description: It can act on behalf of 0x161aF05fA6BdA1c6E7Ee12839d470931bA796948, inheriting its permissions.
    + Status: CREATED
    contract OptimismPortal (0x39A90926306E11497EC5FE1C459910258B620edD)
    +++ description: The main entry point to deposit funds from host chain to this chain. It also allows to prove and finalize withdrawals.
    + Status: CREATED
    contract SuperchainConfig (0x5e8d351FD046Aa0b3DDA24096751996C0c397C61)
    +++ description: Used to manage global configuration values for multiple OP Chains within a single Superchain network. The SuperchainConfig contract manages the `PAUSED_SLOT`, a boolean value indicating whether the Superchain is paused, and `GUARDIAN_SLOT`, the address of the guardian which can pause and unpause the system.
    + Status: CREATED
    contract SystemConfig (0x94118F86eE37Fa4Fdb266CDab1e55B8F0D6959D9)
    +++ description: Contains configuration parameters such as the Sequencer address, gas limit on this chain and the unsafe block signer address.
    + Status: CREATED
    contract L1ERC721Bridge (0xAFc9946b25e3e93208b7E2D477680C5B6e2952be)
    +++ description: Used to bridge ERC-721 tokens from host chain to this chain.
    + Status: CREATED
    contract (0xB77d3ea899ef38c464e19F5A6CBc5a37187DC43c)
    +++ description: None
    + Status: CREATED
    contract L2OutputOracle (0xdd80E05004f40815EaEf12ffeE69c2a8A5112aA5)
    +++ description: 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.
    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.

    • MEV can be extracted if the operator exploits their centralized position and frontruns user transactions.

    1. L2OutputOracle.sol - source code, CHALLENGER address
    2. L2OutputOracle.sol - source code, PROPOSER address

    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.

    1. Sequencing Window - OP Mainnet Specs
    2. OptimismPortal.sol - source code, depositTransaction function
    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.

    • Funds can be frozen if the centralized validator goes down. Users cannot produce blocks themselves and exiting the system requires new block production (CRITICAL).

    1. OptimismPortal.sol - source code, proveWithdrawalTransaction function
    2. OptimismPortal.sol - source code, finalizeWithdrawalTransaction function
    3. L2OutputOracle.sol - source code, PROPOSER check

    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.

    1. Forced withdrawal from an OP Stack blockchain
    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.

    1. Introducing EVM Equivalence
    Permissions
    A dashboard to explore contracts and permissions
    Go to Disco
    Disco UI Banner
    Disco UI BannerExplore in Disco

    Ethereum

    Actors:

    Optopia Multisig0x2C73…4c8C

    A Multisig with 2/3 threshold.

    • Can upgrade with no delay
      • L1CrossDomainMessenger
      • L1StandardBridge
      • OptimismPortal
      • SuperchainConfig
      • SystemConfig
      • L1ERC721Bridge
      • L2OutputOracle
    • Can interact with AddressManager
      • set and change address mappings

    Participants (3):

    0xb613…54620xe30F…6e63EOA 1
    EOA 10xd01D…63eE

    Member of Optopia Multisig.

    • 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 SystemConfig
      • it can update the preconfer address, the batch submitter (Sequencer) address and the gas configuration of the system
    • Can interact with L2OutputOracle
    EOA 20x3339…7e78
    • Can interact with L2OutputOracle
      • Allowed to post new state roots of the current layer to the host chain
    EOA 30x3D0B…71a5
    • Can interact with SystemConfig
      • Allowed to commit transactions from the current layer to the host chain
    Smart contracts
    A dashboard to explore contracts and permissions
    Go to Disco
    Disco UI Banner
    Disco UI BannerExplore in Disco
    A diagram of the smart contract architecture
    A diagram of the smart contract architecture

    Ethereum

    SystemConfig0x9411…59D9Implementation (Upgradable)Admin

    Contains configuration parameters such as the Sequencer address, gas limit on this chain and the unsafe block signer address.

    • Roles:
      • admin: ProxyAdmin; ultimately Optopia Multisig
      • batcherHash: EOA 3
      • owner: EOA 1
    Can be upgraded by:
    Optopia Multisig with no delay
    L2OutputOracle0xdd80…2aA5Implementation (Upgradable)Admin

    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 Optopia Multisig
      • challenger: EOA 1
      • proposer: EOA 2
    Can be upgraded by:
    Optopia Multisig with no delay
    SuperchainConfig0x5e8d…7C61Implementation (Upgradable)Admin

    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 Optopia Multisig
      • guardian: EOA 1
    Can be upgraded by:
    Optopia Multisig with no delay
    L1CrossDomainMessenger0x03D5…BdF3Implementation (Upgradable)Admin

    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 Optopia Multisig
    Can be upgraded by:
    Optopia Multisig with no delay
    L1ERC721Bridge0xAFc9…52beImplementation (Upgradable)Admin

    Used to bridge ERC-721 tokens from host chain to this chain.

    • Roles:
      • admin: ProxyAdmin; ultimately Optopia Multisig
    Can be upgraded by:
    Optopia Multisig with no delay
    ProxyAdmin0x161a…6948
    • Roles:
      • owner: Optopia Multisig
    L1StandardBridge
    Escrow
    0x1adE…1fC1Implementation (Upgradable)Admin
    • Roles:
      • admin: ProxyAdmin; ultimately Optopia Multisig

    All supported tokens in this escrow are included in the value secured calculation.

    Can be upgraded by:
    Optopia Multisig with no delay
    OptimismPortal
    Escrow
    0x39A9…0edDImplementation (Upgradable)Admin
    • Roles:
      • admin: ProxyAdmin; ultimately Optopia Multisig
    The following tokens are included in the value secured calculation:
    ETH token logo
    Can be upgraded by:
    Optopia Multisig with no delay

    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).