# Chain

[Git Source](https://github.com/Ion-Protocol/nucleus-boring-vault/blob/cc0b494b83e17b9b169a73b96050d2810b690477/src/base/Roles/CrossChain/MultiChainTellerBase.sol)

```solidity
struct Chain {
    bool allowMessagesFrom;
    bool allowMessagesTo;
    address targetTeller;
    uint64 messageGasLimit;
    uint64 minimumMessageGas;
}
```