cBridge allows anyone to transfer assets across blockchains by simply providing liquidity (to earn bridging fees). It is built on top of the Celer Inter-chain Message Framework.

Bridge

cBridge

Protocol Code Quality

Protocol Maturity

Protocol Design

Risk Rating

yellow

Average

* [Documentation](https://cbridge-docs.celer.network/) 
 * Auditors 
 	* [CertiK](https://github.com/celer-network/sgn-v2-contracts/blob/main/audit/CertiK_general.pdf) 
 	* [PeckShield](https://github.com/celer-network/sgn-v2-contracts/blob/main/audit/PeckShield_general.pdf) 
 	* [Audits](https://github.com/celer-network/sgn-v2-contracts/blob/main/audit/REP-cBridge-v2-2021-11-17.pdf) 
 	* [Audits](https://github.com/celer-network/sgn-v2-contracts/blob/main/audit/PeckShield-Audit-Report-SGNv2-v1.0.pdf) 
 	* [Audits](https://github.com/celer-network/sgn-v2-contracts/blob/main/audit/SlowMist%20Audit%20Report%20-%20SGN.pdf) 
 * Please see our [FAQ on experienced auditors](https://help.exponential.fi/en/articles/6381015-what-are-experienced-auditors)

Exploit/Hacks

green

None

* [Website](https://cbridge.celer.network/#/transfer)  
 * Token: CELR  
 * Tags: Bridge

Info

* TVL: $141.7M (Rank #46)  
 * TVL Ranking by Bridge: #3  
 * Blockchain: Ethereum, Binance, Arbitrum, Optimism, Polygon, Avalanche, Shiden, Aurora, Fantom, Boba, Metis, Heco, OKExChain, xDai, Celo, Harmony, Astar, Syscoin, Moonriver, CLV, Oasis, Conflux, Milkomeda, Moonbeam, REI  
 * Chain TVL  
 	* Ethereum: $76.7M  
 	* Binance: $13.97M  
 	* Arbitrum: $8.49M  
 	* Optimism: $5.45M  
 	* Polygon: $4.65M  
 	* Others: $9.56M

Key Metrics

Information


- Code reviewed by several experienced auditors including [CertiK](https://github.com/celer-network/sgn-v2-contracts/blob/main/audit/CertiK_general.pdf) and [PeckShield](https://github.com/celer-network/sgn-v2-contracts/blob/main/audit/PeckShield_general.pdf)
- Public team promotes accountability
- No documented protocol hacks since launch


- Core protocol launched in 2021; maturity over 1 year reduces technical risk as smart contracts are moderately battle-tested
- Top 5% by total value locked reduces risk
- Decentralized governance increases transparency
- Low voting power concentration reduces risk


- Protocol could be susceptible to negative feedback loops
- Externally verified bridge system that is reliant on an external set of validators who have to post collateral that gets slashed in case of malicious activities; the slashed collateral is used to reimburse user funds if stolen due to malicious actions

Risk Assessment

Celer's cBridge is a multichain bridge that allows for the transfer of crypto assets across 15+ networks via an instant, low-cost design.

What we like

Requires more trust assumptions as the protocol's consensus mechanism relies on an extrernal, trusted validator. Validators are required to stake CELR tokens as a form of collateral which can result in negative feedback loops.

What we like less

cBridge offers several liquidity pools for you to earn attractive yields from bridging fees and further benefits from its protocol token emissions.

What it means for you

Summary

#### How cBridge works
cBridge uses liquidity pools between the source and destination chain to enable cross-chain transfers. The bridge fee is dynamically adjusted based on the balances of the two liquidity pools using the StableSwap pricing curve (popularized by Curve). The core component of cBridge is the Celer State Guardian Network (SGN), which is a Proof-of-Stake (PoS) blockchain built on Tendermint. SGN uses the same security mechanisms as L1 blockchains like Cosmos and Polygon PoS chain, with staking and slashing implemented on Ethererum. SGN serves as the message router between different chains, routing messages and cross-chain fund transfers. Nodes have to stake CELR tokens to join the consensus process of the SGN as a validator and are slashed if they behave maliciously. Currently, these nodes are operated by trusted third-parties including Binance, InfStones, OKEX, Stakewithus, Unaggii, and Stakefish.
#### How cBridge makes money
cBridge nodes earn a portion of all transaction fees while operating via the SGN. Liquidity providers (LPs) earn the remaining portion of transaction fees and inflationary protocol emissions by providing liquidity to specific pools on cBridge. CELR stakers also earn transaction fees and staking rewards without running a node.
#### How you make money on cBridge
You can earn a portion of all protocol fees by staking CELR via the SGN. CELR stakers earn staking rewards and fee rewards from cBridge in return for producing blocks and providing economic security to the Celer network. You can also earn yield by providing liquidity to a sepcific liquidity pool on cBridge. Currently, 50% of fee earnings are distributed to SGN delegators and stakers, and the other 50% goes to cBridge LPs.