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SummaryValue SecuredActivityOnchain costsRisk summaryRisk analysisRollup stageData availabilityState derivationState validationOperatorWithdrawalsOther considerationsPermissionsSmart contracts

SNAXchain logoSNAXchain

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About

SNAXchain, developed by Synthetix, is a Rollup built on the OP Stack. It aims to enhance Synthetix V3's decentralized governance and streamline operations.

Value secured
$11.01 K12.7%
Canonically Bridged
$11.01 K
Natively Minted
$0.00
Externally Bridged
$0.00
View TVS Breakdown
  • Tokens
  • Past day UOPS
    0.000.00%
  • 30D ops count
    3.08 K
  • Gas token
    ETH
  • Stage
  • Type
    Optimistic Rollup
  • Purpose
    Universal
    • Sequencer failureState validationData availabilityExit windowProposer failure

    Badges

    About

    SNAXchain, developed by Synthetix, is a Rollup built on the OP Stack. It aims to enhance Synthetix V3's decentralized governance and streamline operations.

    Recategorisation

    53d
    13h
    42m
    24s

    The project will be classified as "Other" due to its specific risks that set it apart from the standard classifications.

    The project will move to Others because:

    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
    Value Secured

    2024 Aug 14 — 2025 Apr 26

    Total value securedTotal
    $11.01 K12.7%
    Canonically BridgedCanonically Bridged ValueCanonical
    $11.01 K12.7%
    Natively MintedNatively Minted TokensNative
    $0.000.00%
    Externally BridgedExternally Bridged ValueExternal
    $0.000.00%
    View TVS breakdown
    Activity

    2024 Aug 13 — 2025 Apr 25

    Onchain costs

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

    2024 Aug 13 — 2025 Apr 25

    1 year total cost
    $13.37 K
    Avg cost per L2 UOP
    $1.073966
    1 year data posted
    538.63 MiB
    Avg size per L2 UOP
    44.28 KiB
    Risk summary

    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
    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 regular 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.

    Rollup stageSNAXchainSNAXchain is a
    Stage 0
    Optimistic Rollup.

    Learn more about Rollup stages
    Please keep in mind that these stages do not reflect rollup security, this is an opinionated assessment of rollup 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 derivation
    Node software

    The rollup node is composed of two software components: op-node, implementing consensus related logic, and op-geth, implementing execution logic. The configuration file can be found here.

    Compression scheme

    Data batches are compressed using the zlib algorithm with best compression level.

    Genesis state

    The genesis file can be found here.

    Data format

    The format specification of Sequencer’s data batches can be found here.

    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
    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

    Ethereum

    Roles:

    Challenger Conduit Multisig 1

    Allowed to challenge or delete state roots proposed by a Proposer.

    Used in:

    Guardian OpFoundationOperationsSafe

    Allowed to pause deposits and withdrawals. In op stack systems with a proof system, the Guardian can also blacklist dispute games and set the respected game type (permissioned / permissionless).

    Used in:

    Proposer 0x85C7…d04e

    Allowed to post new state roots of the current layer to the host chain.

    Sequencer 0x060b…D212

    Allowed to commit transactions from the current layer to the host chain.

    Actors:

    Conduit Multisig 1 0x4a49…A746
    • A Multisig with 4/10 threshold.
    • Can act on behalf of ProxyAdmin.
    • A Challenger.
    • Is allowed to interact with SystemConfig - it can update the preconfer address, the batch submitter (Sequencer) address and the gas configuration of the system.
    • Is allowed to interact with AddressManager - set and change address mappings - acting via ProxyAdmin.
    • Can upgrade the implementation of L1ERC721Bridge, SuperchainConfig, OptimismPortal, SystemConfig, OptimismMintableERC20Factory, L2OutputOracle - acting via ProxyAdmin.
    • Can upgrade the implementation of L1StandardBridge - upgrading the bridge implementation can give access to all funds escrowed therein - acting via ProxyAdmin.

    Participants (10):

    0x860e…c0530x5093…66280xA073…bda20xF331…647D0xF0B7…A4f00xa400…e6e40x3840…Fd5f0xa0C6…90380xefCf…dD5C0x4D80…5BAe

    Used in:

    OpFoundationOperationsSafe 0x9BA6…6b3A
    • A Multisig with 5/7 threshold.
    • A Guardian.

    Participants (7):

    GnosisSafe0x3041…16230xE7dE…d02e0xBF93…a2c80x4D01…6d150x7cB0…C54f0x9bbF…31aa

    Used in:

    GnosisSafe 0x42d2…9c64
    • A Multisig with 2/2 threshold.
    • Member of OpFoundationOperationsSafe.

    Participants (2):

    0xb237…97A50x4665…7429

    Used in:

    Smart contracts
    A diagram of the smart contract architecture
    A diagram of the smart contract architecture

    Ethereum

    OptimismPortal 0x936D…4743Implementation (Upgradable)Admin

    The main entry point to deposit funds from host chain to this chain. It also allows to prove and finalize withdrawals. This contract stores the following tokens: ETH.

    Can be upgraded by:
    Conduit Multisig 1 with no delay
    SystemConfig 0x9c9B…27f9Implementation (Upgradable)Admin

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

    Can be upgraded by:
    Conduit Multisig 1 with no delay
    L2OutputOracle 0xF8f3…8B25Implementation (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.

    Can be upgraded by:
    Conduit Multisig 1 with no delay
    SuperchainConfig 0x7439…f1a6Implementation (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.

    Can be upgraded by:
    Conduit Multisig 1 with no delay
    L1CrossDomainMessenger 0x2A4f…f62EImplementation (Upgradable)

    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.

    L1ERC721Bridge 0x4556…1634Implementation (Upgradable)Admin

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

    Can be upgraded by:
    Conduit Multisig 1 with no delay
    L1StandardBridge 0xA5fb…7Fa5Implementation (Upgradable)Admin

    The main entry point to deposit ERC20 tokens from host chain to this chain. This contract can store any token.

    Can be upgraded by:
    Conduit Multisig 1 with no delay
    ProxyAdmin 0x672B…25D7
    • Can be used to interact with AddressManager - set and change address mappings.
    • Can be used to upgrade implementation of L1ERC721Bridge, SuperchainConfig, OptimismPortal, SystemConfig, OptimismMintableERC20Factory, L2OutputOracle.
    • Can be used to upgrade implementation of L1StandardBridge - upgrading the bridge implementation can give access to all funds escrowed therein.
    OptimismMintableERC20Factory 0xeEC7…3A6AImplementation (Upgradable)Admin

    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 OptimismMintablERC20 as this chain’s representation of a token on the host chain, or vice-versa.

    Can be upgraded by:
    Conduit Multisig 1 with no delay

    Value Secured is calculated based on these smart contracts and tokens:

    Generic escrow 0xA5fb…7Fa5Implementation (Upgradable)Admin

    Main entry point for users depositing ERC20 token that do not require custom gateway.

    Can be upgraded by:
    ProxyAdmin with no delay
    Escrow for ETH 0x936D…4743Implementation (Upgradable)Admin

    Main entry point for users depositing ETH.

    Can be upgraded by:
    ProxyAdmin 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).