Ed25519 signing/verification using Web Cryptography API (tested on Node.js, Bun, and Deno)

ed25519.mjs

const keyPair = await crypto.subtle.generateKey(
  "Ed25519",
  true,
  ["sign", "verify"],
);
console.debug(keyPair);

const msg = new TextEncoder().encode("Hello, World!");

const sig = await crypto.subtle.sign(
  "Ed25519",
  keyPair.privateKey,
  msg,
);
console.debug(sig);

const isValid = await crypto.subtle.verify(
  "Ed25519",
  keyPair.publicKey,
  sig,
  msg,
);
console.debug(isValid);