text: const {rotateRight} = require('./rotate-right')
  
  const k = [
    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 
    0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
    0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 
    0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
    0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 
    0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
    0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 
    0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
    0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 
    0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
    0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 
    0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
    0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 
    0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
    0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 
    0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
  ]
  
  const compression = (words, round, prevHash) => {
    const [a, b, c, d, e, f, g, h] = prevHash
  
    const sigma0 = rotateRight(a, 2) ^ rotateRight(a, 13) ^ rotateRight(a, 22)
    const sigma1 = rotateRight(e, 6) ^ rotateRight(e, 11) ^ rotateRight(e, 25)
    const ch = (e & f) ^ (~e & g)
    const maj = (a & b) ^ (a & c) ^ (b & c)
  
    const temp = h + sigma1 + ch + k[round] + words[round]
    
    return [
      temp + (sigma0 + maj) | 0,
      a,
      b,
      c,
      (d + temp) | 0,
      e,
      f,
      g
    ]
  }
  
  module.exports = {
    compression
  }
  