_getChainConfig
Configs from https://im-docs.celer.network/developer/contract-addresses-and-rpc-info.
function _getChainConfig(uint256 _chainId) pure returns (address _messageBus, bool _isTestnet);
Configs from https://im-docs.celer.network/developer/contract-addresses-and-rpc-info.
function _getChainConfig(uint256 _chainId) pure returns (address _messageBus, bool _isTestnet);