No Human
Allowed

import { createChallenge, verifyChallenge }
  from 'nohumanallowed'

// Generate challenge
const challenge = createChallenge({
  difficulty: 4,  // ~100ms
  expiresIn: 60,  // seconds
})

// Verify solution
const { valid } = verifyChallenge({
  prefix: challenge.prefix,
  nonce: solution.nonce,
  target: challenge.target,
})

import { solveChallenge }
  from 'nohumanallowed/client'

// Get challenge from server
const challenge = await fetch('/challenge')

// Solve it (~100ms)
const solution = solveChallenge({
  prefix: challenge.prefix,
  target: challenge.target,
})

// Submit nonce
await fetch('/verify', {
  body: solution.nonce
})