L2BEAT Bridges is a work in progress. You might find incomplete research or inconsistent naming. Join our discord to suggest improvements!



Choose token

Bridged Tokens (Top 15)

Symbiosis (SIS)
Wrapped Ether (WETH)


Symbiosis is a cross-chain AMM DEX externally validated my a MPC relayers network.

If you find something wrong on this page you can submit an issue or edit the information.

Risk summary

Note: This project's overview requires more research and might not present accurate information. If you want to contribute you can edit the information on Github. Alternatively you contact the project team on Twitter and encourage them to contribute a PR.


Principle of operation

Symbiosis uses a MPC relayer network to facilitate cross-chain transfers. An AMM on BOBA BNB is used to perform swaps.

Transfers are externally verified

Requests are watched by a relayer network that, utilizing MPC, signs off swaps and token minting.

  • Users can be censored if MPC nodes decide to censor certain transactions (CRITICAL).

  • Funds can be stolen if MPC nodes decide to maliciously takeover them or there is an external exploit which will result in signing malicious transaction (CRITICAL).

  • Funds can be lost if MPC nodes lose their private keys (CRITICAL).

Destination tokens

Received tokens can be wrapped tokens or native tokens depending on the destination network.

  • Funds can be lost if destination token contract is maliciously upgraded or not securely implemented (CRITICAL).


The system uses the following set of permissioned addresses:

Multisig 0x5112…106a

This multisig can upgrade the BridgeV2 and Portal contracts.

Smart contracts

Note: This section requires more research and might not present accurate information.

The system consists of the following smart contracts:

MetaRouter 0x1DCf…8Adc

An upgradeable contract to process funds by provided route.

MetaRouter Gateway 0x0A0B…F847

A detached contract for secure isolation of users’ assets.

A contract that generates Oracle requests for the Symbiosis relayers network.

A contract that stores “bridged” liquidity. This contract stores the following tokens: USDC, SIS, WETH.

Knowledge Nuggets