Function putCurrentChainAsync

putCurrentChainAsync(chainId): Promise<boolean>
asynchronously set/update the ChainId into the database

for example:
```
import { putCurrentChainAsync } from "debeem-wallet";

const chainId = 1;
const saved : boolean = await putCurrentChainAsync( chainId );
```
Parameters
- chainId: number
  {number} numeric chainId
Returns Promise<boolean>
- Defined in ../../src/config.ts:234