# AVS Screening - Brevis coChain

## Brevis coChain

Contract address: 0x9FC952BdCbB7Daca7d420fA55b942405B073A89d
Website: https://brevis.network/
Twitter: https://x.com/brevis_zk
Docs: https://docs.brevis.network/
Blog: https://blog.brevis.network/
AVS Category: ZK Coprocessor
ETH Restaked: 1,260,943.921
Total Operators: 71
Total restakers: 98,514
Competitors: Phala Network, Axiom, Lagrange
Mainnet Date: April 09 2024
Economic Security wanted: $5.34b
Operator limits: N/A
Points program: N/A

### AVS Description
Brevis Network is a smart Zero-Knowledge (ZK) coprocessor that enables smart contracts to read the full historical on-chain data from any chain and run customisable computations in a trust-free way. The coChain AVS solution combines crypto-economics and efficient ZK proofs to reduce computational overheads and enhance data accessibility.

### Unique Selling Proposition
The coChain model differs from the pure-ZK model as ZK coprocessing requests are reduced significantly and enable dApps previously not viable with the pure-ZK model. The main USPs can be summarized as follows:

1. [Optimistically](https://docs.brevis.network/developer-resources/brevis-cochain) generates coprocessing results, accepts coprocessing requests without having to wait for after on-chain verifications of ZK proofs.
2. Expanded dApp usecases, coChain ZK model allows for features that are fundamentally difficult to create in the “pure-ZK” model, such as proof of non-existence or proof of completeness.

### Economic Model
Coprocessing results are generated through PoS consensus. Results are submitted to blockchains as 'proposals' that can be challenged via Zero-Knowledge fraud proofs. If no challenges are made they can be used by dApps directly without incurring ZK proof generation costs. Successful challenges will trigger the slashing of the corresponding validators’ stakes.

### Points Program
N/А

### Other Product Information
No other product information was observed at time of writing.

### Builders
Built by [Celer Network](https://blog.celer.network/2023/03/21/brevis-a-zk-omnichain-data-attestation-platform/);
Junda Liu: Co-Founder
Qingkai Liang: Co-Founder
Mo Dong: Co-Founder
Xiaozhou Li: Co-Founder

### Backers
Brevis related partnerships: 0G, Algebra, Aperture, NEBRA, JOJO, PADO

### Centralization
Mainnet [AVS Contract](https://etherscan.io/address/0x9fc952bdcbb7daca7d420fa55b942405b073a89d): 0x9FC952BdCbB7Daca7d420fA55b942405B073A89d.
The contract is owned by a single address, [0x9F6B03Cb6d8AB8239cF1045Ab28B9Df43dfCC823](https://etherscan.io/address/0x9F6B03Cb6d8AB8239cF1045Ab28B9Df43dfCC823).

### Operator Opt-out
No mention is given to opt-out conditions for Brevis coChain in Brevis Network Docs.

### Security
1 audit on Brevis AVS contracts has been completed by [Slowmist](https://github.com/brevis-network/brevis-contracts-avs/blob/main/audit/SlowMist%20Audit%20Report%20-%20Brevis%20Contracts%20AVS.pdf) (April 07, 2024). 1 critical level vulnerability was found and fixed and 1 medium vulnerability was found and acknowledged but unresolved.

### Maturity
Mainnet Deployment Date: [April 09 2024](https://etherscan.io/tx/0xa81fa04a750b68704931d14508cb378a86fe73beb2c2fe17de4f944494c41cb9)

### Regulatory Complexity

Low risk of legal challenges is anticipated for the project, rooted in its infrastructural nature, which positions it to be regulatory agnostic.

### Risk Considerations

- The control is centralised in EOA, allegedly controlled by non-doxxed individual(s);