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

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

import { exec } from "child_process";

/**
 * Toggle LED Torch on device
 */
export async function torch(status: "on" | "off"): Promise<void> {
  return new Promise<void>((resolve, reject) => {
    const command = `termux-torch ${status}`;
    exec(command, (error, stdout, stderr) => {
      if (error) {
        return reject(`Error: ${error.message}`);
      }
      if (stderr) {
        return reject(`Error: ${stderr}`);
      }
      return resolve();
    });
  });
}