@dderevjanik/termux-api/src/scripts/termux-fingerprint.ts

This library allows you to interact with your Android device from Node.js using termux-api

import { exec } from "child_process";

/**
 * Represents the result of a fingerprint authentication attempt.
 */
export interface FingerprintAuthResult {
  /**
   * List of errors encountered during the authentication attempt.
   * @example []
   */
  errors: string[];

  /**
   * The number of failed authentication attempts.
   * @example 0
   */
  failed_attempts: number;

  /**
   * The result of the authentication attempt.
   * @example "AUTH_RESULT_SUCCESS"
   */
  auth_result: string;
}

/**
 * Use fingerprint sensor on device to check for authentication.
 */
export async function fingerprint(): Promise<FingerprintAuthResult> {
  return new Promise<FingerprintAuthResult>((resolve, reject) => {
    const command = `termux-fingerprint`;
    exec(command, (error, stdout, stderr) => {
      if (error) {
        return reject(`Error: ${error.message}`);
      }
      if (stderr) {
        return reject(`Error: ${stderr}`);
      }
      const output = stdout.trim();
      const authResult: FingerprintAuthResult = JSON.parse(output);
      return resolve(authResult);
    });
  });
}