Function messagingSigner

messagingSigner(
account: IAccount<ISigner, any, any> | undefined,
): ISigner | undefined
The signer messaging may use for an account. A read-only account is signed in but can neither sign nor decrypt, so it is offered without its encryption methods and reports signer-cannot-encrypt.
Parameters
- account: IAccount<ISigner, any, any> | undefined
  The active account, if any.
Returns ISigner | undefined
The account itself, a signer without encryption for a read-only account, or undefined.
Example
```
const signer = () => messagingSigner(accounts.active);
signerAvailability(signer(), 'nip44');
```