Build with secrets.
Keep them out of chat.

import { encrypt, decrypt, generateControlData,
  generateDeniableControl } from 'deny-sh';

// Demo passwords only. Run as an ES module (.mjs).
const password1 = 'demo-pass-one';
const password2 = 'demo-pass-two';
const message = new TextEncoder().encode('Test secret: blue door');
const controlData = generateControlData(message.length + 4);
const { ciphertext } = await encrypt(message, {
  password1, password2, controlData
});
const { controlData: decoyControl } = await generateDeniableControl(
  ciphertext, password1, password2,
  new TextEncoder().encode('Test note: buy milk')
);
for (const control of [controlData, decoyControl]) {
  const { plaintext } = await decrypt(ciphertext, {
    password1, password2, controlData: control
  });
  console.log(new TextDecoder().decode(plaintext));
}
// Test secret: blue door
// Test note: buy milk