The bridge allows for assets to be listed in a permissionless way, if they have the same contract address on all the connected chains. This can be achieved by using the same wallet and the same nonce for the contract creation on the desired networks.
Projects or individuals are obliged to provide the necessary liquidity on each of the connected chains for the bridge to work properly. New tokens can be found by pasting the contract address in the search field on https://app.crosschainbridge.org/bridge/tokens.
Tokens that don't have the same contract address on all connected chains can still be listed. However, a bridge representative needs to map the token addresses first. To apply, please get in touch with us by filling out this form. The plan is to migrate this process to a community-governance based model once the Cross-Chain Bridge is running in a stable way and enters the next phase of development. See decentralization path for more detailed information on how we plan to achieve this.