This example shows a blockchain wallet login interface that handles authentication through either seed phrases and passwords or Metamask, displaying the account address and ETH balance once logged in. The Angular component uses reactive forms with `FormGroup` and `FormControl` to validate user input, including custom seed validation and password length checks. The template conditionally renders login fields or balance information based on wallet state, while buttons trigger `sendLogin()`, `loginMetamask()`, or `logout()` methods. The form relies on Angular’s `*ngIf` and async pipes to manage visibility and Metamask availability.