t data
  }

  public async execAsync(_: void): Promise&lt;void&gt; {
    // Execute payment processing
  }

  public async postAsync(sharedState: any, prepResult: void, execResult: void): Promise&lt;string&gt; {
    return DEFAULT_ACTION;
  }
}

// Define ReviseExpenseNode
class ReviseExpenseNode extends BaseNode {
  public async prepAsync(sharedState: any): Promise&lt;void&gt; {
    // Prepare revision data
  }

  public async execAsync(_: void): Promise&lt;void&gt; {
    // Execute revision logic
  }

  p