Function isChainConfig

isChainConfig(config: VanaConfig): config is ChainConfig
Validates whether a configuration object is a ChainConfig.
Parameters
- config: VanaConfig
  The configuration object to check
Returns config is ChainConfig
True if the config is a ChainConfig (contains chainId but not walletClient)
Example
```
if (isChainConfig(config)) {
  console.log('Chain ID:', config.chainId);
  console.log('RPC URL:', config.rpcUrl);
} else {
  console.log('Using pre-configured wallet client');
}
```
- Defined in packages/vana-sdk/src/types/config.ts:415