e97c778b (main)
and
1dbd0921 (PR)
+0 -5
+0 -5
{
"consensusAlgorithm": {
"name": "CometBFT",
"description": "CometBFT is the canonical implementation of the Tendermint consensus algorithm.\n CometBFT allows for a state transition machine to be written in any programming language, and it allows for secure replication across many machines.\n The consensus protocol is fork-free by construction under an honest majority of stake assumption.",
"blockTime": 6,
"consensusFinality": 1,
"unbondingPeriod": 1213200
},
"dataAvailabilitySampling": {
"erasureCodingScheme": "2D Reed-Solomon",
"erasureCodingProof": "Fraud proofs"
},
"economicSecurity": {
"token": {
"symbol": "TIA",
"decimals": 6,
"coingeckoId": "celestia"
}
},
"finality": 6,
"pruningWindow": 608400,
"risks": {
"economicSecurity": {
"value": {
"value": "Staked assets",
"sentiment": "good",
"description": "There are staked assets on the DA layer that can be slashed in case of a data withholding attack. A dishonest supermajority of validators must collude to finalize a block with missing or invalid data. The invalid block would be added to the chain but rejected by honest full nodes.\n "
},
"adjustSecurityRisk": true
},
"fraudDetection": {
"value": "DAS",
"sentiment": "warning",
"description": "The DA layer uses data availability sampling (DAS) to protect against data withholding attacks. However, the block reconstruction protocol, which enables the minimum number of light nodes to collectively reconstruct the block, is still under development.",
"secondLine": ""
}
},
"sovereignProjectsTrackingConfig": [
{
"projectId": "battle-for-blockchain",
"name": "Battle for Blockchain",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5047670,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAKzFLTn1xOipecg="
}
]
},
{
"projectId": "bullet",
"name": "Bullet",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 10168980,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAGJsdGJhdGNoLWw="
},
{
"type": "celestia",
"sinceBlock": 10183821,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAGJsdGJhdGNoLXQ="
},
{
"type": "celestia",
"sinceBlock": 10456208,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAGJsdGJhdGNoLXo="
}
]
},
{
"projectId": "camp",
"name": "Camp",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 6459709,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAB7AAAAAAAAAeQ="
}
]
},
{
"projectId": "civitia",
"name": "Civitia",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 4492300,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAEwLOhV+kOUlUq4="
}
]
},
{
"projectId": "clique",
"name": "Clique",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 3161819,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAARQV7t6sd4A="
}
]
},
{
"projectId": "echelon",
"name": "Echelon",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5659637,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAItyY42OaTC/skE="
}
]
},
{
"projectId": "echos",
"name": "Echos",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 3161819,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAA/cZMN1XLG8="
}
]
},
{
"projectId": "eden",
"name": "Eden",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 9409947,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAORr5sRrVhwIjmU="
},
{
"type": "celestia",
"sinceBlock": 9413424,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAoxK5AW18ozObY="
}
]
},
{
"projectId": "embr-fun",
"name": "Embr.fun",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5954601,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAMbONmnisjTDz4I="
}
]
},
{
"projectId": "flame",
"name": "Flame",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 3161819,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAL2dxfeNrJ+tg6Y="
}
]
},
{
"projectId": "flynet",
"name": "Flynet",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5188001,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAACyPE7Ql9zwA="
}
]
},
{
"projectId": "forma",
"name": "Forma",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 3161819,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAKKnitomrCy/HoY="
}
]
},
{
"projectId": "foundation-network",
"name": "Foundation Network",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 3667737,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAN/xAxpagCrjLVQ="
}
]
},
{
"projectId": "hibachi",
"name": "Hibachi",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5979823,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAABoaWJhY2hpLXM="
},
{
"type": "celestia",
"sinceBlock": 5981133,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAGhpYmFjaGk="
}
]
},
{
"projectId": "ing",
"name": "ING",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5945453,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAALdhUSKgKHU0Zx0="
}
]
},
{
"projectId": "inertia",
"name": "Inertia",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5941532,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAEg2If2QGyq4ZRQ="
}
]
},
{
"projectId": "intergaze",
"name": "Intergaze",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5748411,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAIoZCJNLh1XvOZA="
}
]
},
{
"projectId": "milkyway",
"name": "Milkyway",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5298640,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAB2AZsEwLd1LLHk="
}
]
},
{
"projectId": "onchain",
"name": "Onchain",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 3161819,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAABNfLrOLSCTY="
}
]
},
{
"projectId": "perennial",
"name": "Perennial",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 3886561,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAaToZYrE0tA="
}
]
},
{
"projectId": "rave",
"name": "Rave",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5645296,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAF45zaUciayEPXE="
}
]
},
{
"projectId": "relay-chain",
"name": "Relay Chain",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 9272873,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAHJlbGF5LWRhdGE="
}
]
},
{
"projectId": "rena",
"name": "Rena",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5775045,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAMxohfftlR5t59s="
}
]
},
{
"projectId": "rivalz-network",
"name": "Rivalz Network",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 4932528,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAMJ/xGlNMdE="
}
]
},
{
"projectId": "xo-market",
"name": "XO Market",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 8164261,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAACnGTcXcpKRnenc="
},
{
"type": "celestia",
"sinceBlock": 8383370,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAEjr00EdZDGvoMU="
}
]
},
{
"projectId": "yominet",
"name": "Yominet",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5966190,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAFjh+OUc/ORU/0o="
}
]
},
{
"projectId": "zaar",
"name": "Zaar",
"daTrackingConfig": [
{
"type": "celestia",
"sinceBlock": 5587852,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAM8NBxiaOQwFwQc="
}
]
}
],
"systemCategory": "public",
"technology": {
"description": "## Architecture\n\n\n\n## Consensus\nCelestia uses CometBFT, the canonical implementation of Tendermint consensus protocol. The consensus protocol is fork-free by construction under an honest majority of stake assumption.\nCelestia achieves finality at each block, with an average time between blocks of 6 seconds.\n## Blobs\nIn Celestia, blobs are user-submitted data that do not modify the blockchain state. \nEach blob has two components, one is a binary object of raw data bytes, and the other is the namespace of the specific application for which the blob data is intended for.\n\n\n\n\nAll data posted in a Celestia blob is divided into chunks of fixed size, called shares, and each blob is arranged in a k * k matrix of shares. The maximum original square size is 512 (k = 512), for a total of 262,144 shares.\n\n\n\n\nCelestia shares' rows and columns are erasure-coded into a 2k * 2k matrix and committed to in a Namespaced Merkle Trees (NMTs), a version of a standard Merkle tree using a namespaced hash function. \nIn NMTs, every node in the tree includes the range of namespaces of all its child nodes, allowing applications to request and retrieve data for a specific namespace sub-tree while maintaining all functionalities (e.g., inclusion and range proofs) of a standard Merkle tree.\n\n\n\n\nUltimately, a single data root (availableDataRoot) of the Merkle tree is computed with the row and column roots as leaves. This data root is included in the block header as the root of commitments to erasure-coded data so that individual shares in the matrix can be proven to belong to a single data root.\n\n\n\n\n## Data Availability Sampling (DAS)\n\nTo ensure data availability, Celestia light nodes perform sampling on the 2k x 2k data matrix. Each light node randomly selects a set of unique coordinates within the extended matrix and requests the corresponding data shares and Merkle proofs from full nodes.\nCurrently, a Celestia light node must perform a minimum of 16 samples before declaring that a block is available.\nThis sampling rate ensures that given the minimum number of unavailable shares, a light client will sample at least one unavailable share with a 99% probability.\n\nFor more details on DAS probabilistic analysis, see the Fraud and Data Availability Proofs paper.\n\n\n\n\n## Erasure Coding Proof\nLight nodes performing data availability sampling must have the guarantee that the sampled data is erasure coded correctly. In Celestia, light nodes can be notified of a maliciously encoded block through Bad Encoding Fraud Proofs (BEFPs). Full nodes receiving invalid erasure-coded data can generate a fraud-proof to be transmitted to all light and full nodes in the DA network. The proof is generated by full nodes reconstructing the original data from the block data, and verifying that the recomputed data root matches the data root of the block header. \nUpon receiving and verifying the BEFP, all Celestia nodes should halt providing services (e.g., submitTx).\n\n## L2s Data Availability\nL2s can post data to Celestia by submitting blobs through a payForBlobs transaction. The transaction can include data as a single blob or multiple blobs, with the total maximum size determined by the maximum block size. The transaction fee is determined by the size of the data and the current gas price. \nApplications can then retrieve the data by querying the Celestia blockchain for the data root of the blob and the namespace of the application. The data can be reconstructed by querying the Celestia network for the shares of the data matrix and reconstructing the data using the erasure coding scheme.",
"references": [
{
"title": "Celestia Specifications",
"url": "https://celestiaorg.github.io/celestia-app/data_structures.html"
},
{
"title": "Celestia Core - CometBFT",
"url": "https://github.com/celestiaorg/celestia-core"
},
{
"title": "Celestia Node - Data Retrieval",
"url": "https://github.com/celestiaorg/celestia-node/blob/9ff58570ef86e505b718abfc755fd18643a2284c/share/eds/retriever.go#L60"
},
{
"title": "Bad Encoding Fraud Proofs",
"url": "https://github.com/celestiaorg/celestia-node/blob/main/docs/adr/adr-006-fraud-service.md"
},
{
"title": "Fraud and Data Availability Proofs paper",
"url": "https://arxiv.org/pdf/1809.09044"
}
],
"risks": [
{
"category": "Funds can be lost if",
"text": "a dishonest supermajority of Celestia validators finalizes an unavailable block, and there aren't light nodes on the network verifying data availability, or they fail at social signaling unavailable data."
},
{
"category": "Funds can be lost if",
"text": "a dishonest supermajority of Celestia validators finalizes an unavailable block, and the light nodes on the network cannot collectively reconstruct the block."
}
]
},
"throughput": [
{
"size": 33554432,
"frequency": 6,
"sinceTimestamp": 1764802980
},
{
"size": 8388608,
"frequency": 6,
"sinceTimestamp": 1738022400
},
{
"size": 1974272,
"frequency": 6,
"sinceTimestamp": 1733961600
},
{
"size": 1974272,
"frequency": 12,
"sinceTimestamp": 1698710400
}
],
"type": "Public Blockchain",
"usedWithoutBridgeIn": [
{
"id": "ancient",
"name": "Ancient8",
"slug": "ancient8"
},
{
"id": "b3",
"name": "B3",
"slug": "b3"
},
{
"id": "lyra",
"name": "Derive",
"slug": "derive"
},
{
"id": "eclipse",
"name": "Eclipse",
"slug": "eclipse"
},
{
"id": "karak",
"name": "K2",
"slug": "k2"
},
{
"id": "lightlink",
"name": "LightLink",
"slug": "lightlink"
},
{
"id": "mantapacific",
"name": "Manta Pacific",
"slug": "mantapacific"
},
{
"id": "nillion",
"name": "Nillion",
"slug": "nillion"
},
{
"id": "orderly",
"name": "Orderly Network",
"slug": "orderly"
},
{
"id": "settlus",
"name": "Settlus",
"slug": "settlus"
},
{
"id": "river",
"name": "Towns",
"slug": "towns"
}
],
"validators": {
"type": "dynamic"
}
}+5 -0
+5 -0
{
"daLayer": "ethereum",
"name": "Enshrined Bridge",
"risks": {
"daBridge": {
"value": "Enshrined",
"sentiment": "good",
"description": "Rollup users have access to all the data, as it is posted onchain on the consensus layer. On the execution layer, the rollup relies on blob data commitment (versioned hashes), which are accessible through the BLOBHASH opcode. \nThe rollup smart contracts can use these blob commitments during state transition validation to reference blobs during proof verification, without requiring direct access to the raw blob data.\n "
},
"callout": "Unlike non-enshrined DA bridges, it does not place any honesty\nassumption on an external committee that provides data availability\nattestations to the DA bridge. From the rollup perspective,\nEthereum's canonical chain cannot contain unavailable data\ncommitments as full nodes self-verify the data availability of each\nblock, discarding blocks with unavailable data. The rollup state\nvalidating bridge has access to all the data, as it is posted on chain."
},
"technology": {
"description": "## Enshrined Bridge\nThe DA bridge on Ethereum is enshrined, meaning that blob data is directly accessible on the consensus layer, with data availability guaranteed by the network's inherent consensus rules. \nIf a block contains unavailable data, full nodes will reject it, causing the chain to fork away from that block. This ensures data availability without requiring additional trust assumptions. \nIn contrast, external DA providers must rely on data availability attestations from the external validator set, introducing an extra layer of trust on the majority of validators."
},
"usedIn": [
{
"id": "abstract",
"name": "Abstract",
"slug": "abstract"
},
{
"id": "adi",
"name": "ADI Chain",
"slug": "adi"
},
{
"id": "arbitrum",
"name": "Arbitrum One",
"slug": "arbitrum"
},
{
"id": "aztecnetwork",
"name": "Aztec Network",
"slug": "aztecnetwork"
},
{
"id": "base",
"name": "Base Chain",
"slug": "base"
},
{
"id": "blast",
"name": "Blast",
"slug": "blast"
},
{
"id": "bob",
"name": "BOB",
"slug": "bob"
},
{
"id": "bobanetwork",
"name": "Boba Network",
"slug": "bobanetwork"
},
{
"id": "cartesi-prt-honeypot-v2",
"name": "Cartesi PRT Honeypot v2",
"slug": "cartesi-prt-honeypot-v2"
},
{
"id": "dbk",
"name": "DeBank Chain",
"slug": "dbk"
},
{
"id": "deri",
"name": "Deri",
"slug": "deri"
},
{
"id": "ethscriptions",
"name": "Ethscriptions",
"slug": "ethscriptions"
},
{
"id": "facet",
"name": "Facet",
"slug": "facet"
},
{
"id": "fluent",
"name": "Fluent",
"slug": "fluent"
},
{
"id": "forknet",
"name": "Forknet",
"slug": "forknet"
},
{
"id": "hashkey",
"name": "HashKey Chain",
"slug": "hashkey"
},
{
"id": "hemi",
"name": "Hemi",
"slug": "hemi"
},
{
"id": "ink",
"name": "Ink",
"slug": "ink"
},
{
"id": "katana",
"name": "Katana",
"slug": "katana"
},
{
"id": "lighter",
"name": "Lighter",
"slug": "lighter"
},
{
"id": "linea",
"name": "Linea",
"slug": "linea"
},
{
"id": "lisk",
"name": "Lisk",
"slug": "lisk"
},
{
"id": "mantle",
"name": "Mantle",
"slug": "mantle"
},
{
"id": "metal",
"name": "Metal",
"slug": "metal"
},
{
"id": "metis",
"name": "Metis Andromeda",
"slug": "metis"
},
{
"id": "mode",
"name": "Mode Network",
"slug": "mode"
},
{
"id": "morph",
"name": "Morph",
"slug": "morph"
},
{
"id": "optimism",
"name": "OP Mainnet",
"slug": "op-mainnet"
},
{
"id": "phala",
"name": "Phala",
"slug": "phala"
},
{
"id": "r0ar",
"name": "R0ar",
"slug": "r0ar"
},
{
"id": "robinhood",
"name": "Robinhood Chain",
"slug": "robinhood"
},
{
"id": "scroll",
"name": "Scroll",
"slug": "scroll"
},
{
"id": "settlus",
"name": "Settlus",
"slug": "settlus"
},
{
"id": "shape",
"name": "Shape",
"slug": "shape"
},
{
"id": "soneium",
"name": "Soneium",
"slug": "soneium"
},
{
"id": "starknet",
"name": "Starknet",
"slug": "starknet"
},
{
"id": "superseed",
"name": "Superseed",
"slug": "superseed"
},
{
"id": "swan",
"name": "Swan Chain",
"slug": "swan"
},
{
"id": "sxnetwork",
"name": "SX Network",
"slug": "sxnetwork"
},
{
"id": "taiko",
"name": "Taiko Alethia",
"slug": "taiko"
},
{
"id": "unichain",
"name": "Unichain",
"slug": "unichain"
},
{
"id": "worldchain",
"name": "World Chain",
"slug": "world"
},
{
"id": "xlayer",
"name": "X Layer",
"slug": "xlayer"
},
{
"id": "zircuit",
"name": "Zircuit",
"slug": "zircuit"
},
{
"id": "zksync2",
"name": "ZKsync Era",
"slug": "zksync-era"
},
{
"id": "zora",
"name": "Zora",
"slug": "zora"
}
]
}+54 -55
+4 -4
{
"badges": [
{
"id": "EVM",
"type": "VM",
"name": "EVM",
"description": "This project uses the Ethereum Virtual Machine to run its smart contracts and supports the Solidity programming language",
"action": {
"type": "scalingFilter",
"id": "vm",
"value": "EVM"
}
},
{
"id": "Celestia",
"id": "EthereumBlobs",
"type": "DA",
"name": "Celestia",
"description": "This project is posting its data to Celestia",
"name": "Ethereum with blobs",
"description": "This project is posting its data to Ethereum as blobs",
"action": {
"type": "publicDaHighlight",
"slug": "celestia"
"slug": "ethereum"
}
},
{
"id": "OPStack",
"type": "Stack",
"name": "Built on OP Stack",
"description": "The project is built on the OP Stack",
"action": {
"type": "scalingFilter",
"id": "stack",
"value": "OP Stack"
}
},
{
"id": "Superchain",
"type": "Infra",
"name": "Part of the Superchain",
"description": "The project is part of the Superchain, meaning it's included in the Superchain registry or uses the Superchain config",
"action": {
"type": "scalingFilter",
"id": "infrastructure",
"value": "Superchain"
}
},
{
"id": "Alchemy",
"type": "RaaS",
"name": "Alchemy",
"description": "This project was deployed via the rollup-as-a-service provider Alchemy",
"action": {
"type": "scalingFilter",
"id": "raas",
"value": "Alchemy"
}
}
],
"description": "Settlus is an OP stack L2 designed to provide transparent settlement system for the creator economy.",
"links": {
"websites": [
"https://settlus.org/"
],
"bridges": [
"https://settlus-mainnet.bridge.alchemy.com/"
],
"explorers": [
"https://mainnet.settlus.network/"
],
"documentation": [
"https://docs.settlus.org/"
],
"repositories": [
"https://github.com/settlus"
],
"socialMedia": [
"https://x.com/Settlusofficial",
"https://medium.com/@settlus_official"
]
}
}+9 -1
[]
[
{
"title": "Settlus switches back to Ethereum blobs",
"url": "https://etherscan.io/tx/0xc9fff1fdd3ce712e0885d383459a132ba0d409021249e4d5f4543ed7ff936911",
"date": "2026-08-31T00:00:00Z",
"description": "Settlus stops posting data to Celestia and uses Ethereum blobs for data availability.",
"type": "general"
}
]+1 -6
{
"capability": "universal",
"daLayer": [
"Celestia"
"Ethereum"
],
"hostChain": {
"id": "ethereum",
"slug": "ethereum",
"name": "Ethereum"
},
"infrastructure": "Superchain",
"layer": "layer2",
"proofSystem": {
"type": "Optimistic",
"name": "OPFP",
"challengeProtocol": "Interactive"
},
"purposes": [
"Universal"
],
"raas": "Alchemy",
"reasonsForBeingOther": [
{
"label": "Closed proofs",
"shortDescription": "There are less than 5 external actors that can submit challenges",
"description": "Projects without a sufficiently decentralized set of challengers rely on few entities to safely update the state. A small set of challengers can collude with the proposer to finalize an invalid state, which can cause loss of funds."
},
{
"label": "No DA bridge",
"shortDescription": "There is no data availability bridge",
"description": "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."
}
],
"stacks": [
"OP Stack"
],
"stage": "Stage 0",
"type": "Other",
"vm": [
"EVM"
]
}+15 -11
{
"message": {
"type": "underReview",
"text": "The requirement for available node software is under review."
"text": "The requirement for available node software is under review"
},
"missing": {
"nextStage": "Stage 1",
"requirements": [
"Users' withdrawals can be censored by the permissioned operators.",
"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."
],
"principle": "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."
"principle": "Compromising ≥75% of the Security Council should be the only way (other than bugs) for a rollup to indefinitely block an L2→L1 message (e.g. a withdrawal) or push an invalid L2→L1 message (e.g. an invalid withdrawal) with a <7d exit window."
},
"stage": "Stage 0",
"summary": [
{
"stage": "Stage 0",
"requirements": [
{
"satisfied": true,
"description": "The project self-identifies as a Validium or Optimium."
"description": "A complete and functional proof system is deployed."
},
{
"satisfied": false,
"description": "Fraud proof submission is not sufficiently decentralized."
},
{
"satisfied": true,
"description": "State roots are posted to Ethereum L1."
"description": "The project calls itself a rollup."
},
{
"satisfied": true,
"description": "A complete and functional proof system (fraud or validity proofs) is deployed."
"description": "State roots are posted to Ethereum L1."
},
{
"satisfied": "UnderReview",
"description": "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."
"satisfied": true,
"description": "Inputs for the state transition function are posted to Ethereum L1."
},
{
"satisfied": false,
"description": "Fraud proof submission is not sufficiently decentralized."
"satisfied": "UnderReview",
"description": "A source-available node exists that can recreate the state from Ethereum L1 data. Please note that the L2BEAT team has not verified the validity of the node source code."
}
]
},
{
"stage": "Stage 1",
"requirements": [
{
"satisfied": false,
"description": "Users' withdrawals can be censored by the permissioned operators."
},
{
"satisfied": false,
"description": "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."
},
{
"satisfied": true,
"description": "The sources of all programs used are public and program hashes can be independently regenerated."
}
],
"principle": {
"satisfied": false,
"description": "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."
"description": "Compromising ≥75% of the Security Council should be the only way (other than bugs) for a rollup to indefinitely block an L2→L1 message (e.g. a withdrawal) or push an invalid L2→L1 message (e.g. an invalid withdrawal) with a <7d exit window."
}
},
{
"stage": "Stage 2",
"requirements": [
{
"satisfied": false,
"description": "Fraud proof submission is open only to whitelisted actors."
},
{
"satisfied": false,
"description": "Upgrades unrelated to onchain provable bugs, including upgrades to the DA verifier, provide less than 30d to exit."
"description": "Upgrades unrelated to onchain provable bugs provide less than 30d to exit."
},
{
"satisfied": false,
"description": "The Security Council's actions are not confined to onchain provable bugs."
}
]
}
]
}+4 -3
{
"self": {
"stateValidation": {
"value": "Fraud proofs (INT)",
"description": "Fraud proofs allow actors watching the chain to prove that the state is incorrect. Interactive proofs (INT) require multiple transactions over time to resolve. Only one entity is currently allowed to propose and submit challenges, as only permissioned games are currently allowed.",
"executionDelay": 302400,
"challengeDelay": 302400,
"sentiment": "bad",
"orderHint": null,
"initialBond": {
"value": "0.0"
},
"permissioned": true,
"defenderAdvantage": "not-applicable",
"secondLine": "3d 12h challenge period\n+ 3d 12h execution delay"
},
"exitWindow": {
"value": "None",
"description": "There is no window for users to exit in case of an unwanted upgrade since contracts are instantly upgradable.",
"sentiment": "bad",
"orderHint": -604800
},
"proposerFailure": {
"value": "Cannot withdraw",
"description": "Only the whitelisted proposers can publish state roots on L1, so in the event of failure the withdrawals are frozen.",
"sentiment": "bad",
"orderHint": null
},
"dataAvailability": {
"value": "External",
"description": "Proof construction and state derivation fully rely on data that is posted on Celestia. Sequencer tx roots are not checked against the Blobstream bridge data roots onchain, but L2 nodes can verify data availability by running a Celestia light client.",
"sentiment": "bad"
"value": "Onchain",
"description": "All of the data needed for proof construction is published on Ethereum L1.",
"sentiment": "good",
"orderHint": null
},
"sequencerFailure": {
"value": "Self sequence",
"description": "In the event of a sequencer failure, users can force transactions to be included in the project's chain by sending them to L1. There can be up to a 12h delay on this operation.",
"sentiment": "good",
"orderHint": 43200,
"secondLine": "12h delay"
}
}
}+9 -8
[
{
"layer": {
"value": "Celestia",
"sentiment": "warning",
"description": "The data is posted to Celestia.",
"projectId": "celestia"
"value": "Ethereum",
"secondLine": "Blobs or Calldata",
"sentiment": "good",
"description": "The data is posted to Ethereum as calldata or blobs.",
"projectId": "ethereum"
},
"bridge": {
"value": "None",
"sentiment": "bad",
"description": "There is no bridge that can attest if the data has been made available.",
"orderHint": -2
"value": "Enshrined",
"sentiment": "good",
"description": "The validating bridge has access to all the data, as it is posted onchain.",
"projectId": "ethereum"
},
"mode": {
"value": "Transaction data",
"secondLine": "Compressed"
}
}
]+4 -19
{
"architectureImage": "opstack-optimium-superchain-opfp",
"architectureImage": "opstack-rollup-superchain-opfp",
"dataAvailability": [
{
"name": "Data is posted to Celestia",
"description": "Transactions roots are posted onchain and the full data is posted on Celestia. Since the Blobstream bridge is not used, availability of the data is not verified against Celestia validators, meaning that the Sequencer can single-handedly publish unavailable roots.",
"risks": [
{
"category": "Funds can be lost if",
"text": "the sequencer posts an unavailable transaction root.",
"isCritical": true
},
{
"category": "Funds can be lost if",
"text": "the data is not available on the external provider.",
"isCritical": true
}
],
"name": "All data required for proofs is published on chain",
"description": "All the data that is used to construct the system state is published on chain in the form of cheap blobs or calldata. This ensures that it will be available for enough time.",
"risks": [],
"references": [
{
"title": "Introducing Blobstream: streaming modular DA to Ethereum",
"url": "https://blog.celestia.org/introducing-blobstream/"
},
{
"title": "Derivation: Batch submission - OP Mainnet specs",
"url": "https://github.com/ethereum-optimism/specs/blob/main/specs/protocol/derivation.md#batch-submission"
},
{
"title": "BatchInbox - address",
"url": "https://etherscan.io/address/0x003E40D3125591bD722aB1bB880c78e4D74d0977#code"
},
{
"title": "OptimismPortal2.sol - source code, depositTransaction function",
"url": "https://etherscan.io/address/0x97cEbbf8959e2A5476fbe9B98A21806Ec234609B#code"
}
]
}
],
"exitMechanisms": [
{
"name": "Regular exits",
"description": "The user initiates the withdrawal by submitting a regular transaction on this chain. When a state root containing such transaction is settled, the funds become available for withdrawal on L1 after 3d 12h. Withdrawal inclusion can be proven before state root settlement, but a 7d period has to pass before it becomes actionable. The process of state root settlement takes a challenge period of at least 3d 12h to complete. Finally the user submits an L1 transaction to claim the funds. This transaction requires a merkle proof.",
"risks": [],
"references": [
{
"title": "OptimismPortal2.sol - Etherscan source code, proveWithdrawalTransaction function",
"url": "https://etherscan.io/address/0x97cEbbf8959e2A5476fbe9B98A21806Ec234609B#code"
},
{
"title": "OptimismPortal2.sol - Etherscan source code, finalizeWithdrawalTransaction function",
"url": "https://etherscan.io/address/0x97cEbbf8959e2A5476fbe9B98A21806Ec234609B#code"
}
]
},
{
"name": "Forced messaging",
"description": "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.",
"risks": [],
"references": [
{
"title": "Forced withdrawal from an OP Stack blockchain",
"url": "https://docs.optimism.io/stack/transactions/forced-transaction"
}
]
}
],
"forceTransactions": {
"name": "Users can force any transaction",
"description": "Because the state of the system is based on transactions submitted on the underlying host chain and anyone can submit their transactions there it allows the users to circumvent censorship by interacting with the smart contract on the host chain directly.",
"risks": [],
"references": [
{
"title": "Sequencing Window - OP Mainnet Specs",
"url": "https://github.com/ethereum-optimism/optimism/blob/51eeb76efeb32b3df3e978f311188aa29f5e3e94/specs/glossary.md#sequencing-window"
},
{
"title": "OptimismPortal2.sol - source code, depositTransaction function",
"url": "https://etherscan.io/address/0x97cEbbf8959e2A5476fbe9B98A21806Ec234609B#code"
}
]
},
"operator": {
"name": "The system has a centralized operator",
"description": "The operator is the only entity that can propose blocks. A live and trustworthy operator is vital to the health of the system.",
"risks": [
{
"category": "MEV can be extracted if",
"text": "the operator exploits their centralized position and frontruns user transactions."
}
],
"references": []
},
"otherConsiderations": [
{
"name": "EVM compatible smart contracts are supported",
"description": "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.",
"risks": [],
"references": [
{
"title": "Introducing EVM Equivalence",
"url": "https://medium.com/ethereum-optimism/introducing-evm-equivalence-5c2021deb306"
}
]
}
],
"stateValidation": {
"description": "Updates to the system state can be proposed and challenged by permissioned operators only. If a state root passes the challenge period, it is optimistically considered correct and made actionable for withdrawals.",
"categories": [
{
"title": "State root proposals",
"description": "Proposers submit state roots as children of the latest confirmed state root (called anchor state), by calling the `create` function in the DisputeGameFactory. A state root can have multiple conflicting children. Each proposal requires a stake, currently set to 0.0 ETH, that can be slashed if the proposal is proven incorrect via a fraud proof. Stakes can be withdrawn only after the proposal has been confirmed. A state root gets confirmed if the challenge period has passed and it is not countered.",
"references": [
{
"title": "OP stack specification: Fault Dispute Game",
"url": "https://specs.optimism.io/fault-proof/stage-one/fault-dispute-game.html#fault-dispute-game"
}
],
"risks": [
{
"category": "Funds can be stolen if",
"text": "no whitelisted challenger disputes an invalid state root before the challenge window expires.",
"isCritical": true
}
]
},
{
"title": "Challenges",
"description": "Challenges are opened to disprove invalid state roots using bisection games. Each bisection move requires a stake that increases expontentially with the depth of the bisection, with a factor of 1.09493. The maximum depth is 73, and reaching it therefore requires a cumulative stake of 0.00 ETH from depth 0. Actors can participate in any challenge by calling the `defend` or `attack` functions, depending whether they agree or disagree with the latest claim and want to move the bisection game forward. Actors that disagree with the top-level claim are called challengers, and actors that agree are called defenders. Each actor might be involved in multiple (sub-)challenges at the same time, meaning that the protocol operates with [full concurrency](https://medium.com/l2beat/fraud-proof-wars-b0cb4d0f452a). Challengers and defenders alternate in the bisection game, and they pass each other a clock that starts with 3d 12h. If a clock expires, the claim is considered defeated if it was countered, or it gets confirmed if uncountered. Since honest parties can inherit clocks from malicious parties that play both as challengers and defenders (see [freeloader claims](https://specs.optimism.io/fault-proof/stage-one/fault-dispute-game.html#freeloader-claims)), if a clock gets inherited with less than 3h, it generally gets extended by 3h with the exception of 6h right before depth 30, and 1d right before the last depth. The maximum clock extension that a top level claim can get is therefore 10d. Since unconfirmed state roots are independent of one another, users can decide to exit with a subsequent confirmed state root if the previous one is delayed. Winners get the entire losers' stake, meaning that sybils can potentially play against each other at no cost. The final instruction found via the bisection game is then executed onchain in the MIPS one step prover contract who determines the winner. The protocol does not enforce valid bisections, meaning that actors can propose correct initial claims and then provide incorrect midpoints. The protocol can be subject to resource exhaustion attacks ([Spearbit 5.1.3](https://github.com/ethereum-optimism/optimism/blob/develop/docs/security-reviews/2024_08_Fault-Proofs-No-MIPS_Spearbit.pdf)).",
"references": [
{
"title": "Fraud Proof Wars: OPFP",
"url": "https://medium.com/l2beat/fraud-proof-wars-b0cb4d0f452a"
}
]
}
]
}
}+6 -1
{}
{
"explanation": "Settlus is an Optimistic rollup that posts transaction data to the L1. For a transaction to be considered final, it has to be posted within a tx batch on L1 that links to a previous finalized batch. If the previous batch is missing, transaction finalization can be delayed up to 12h or until it gets published. The state root is settled 7d after it has been posted.",
"warnings": {
"stateUpdates": "Please note, for Optimistic rollups the state is not finalized until the challenge period passes."
}
}+1 -1
[
{
"type": "ethereum",
"daLayer": "ethereum",
"sinceBlock": 21890837,
"untilBlock": 24433367,
"inbox": "0x003E40D3125591bD722aB1bB880c78e4D74d0977",
"sequencers": [
"0xD0b4c3aC8A50B6F1B3949ADaf55Cc9805620EB57"
]
},
{
"type": "celestia",
"daLayer": "celestia",
"sinceBlock": 9779673,
"untilBlock": 13618693,
"namespace": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFPs="
}
]+1 -1
{
"baseTimestamp": 1784283126,
"baseTimestamp": 1788792449,
"contractsDiscoDriven": true,
"hasDiscoUi": true,
"isDiscoDriven": true,
"permissionsDiscoDriven": true
}