PoW-WP-testvectors.scala

  property("testvectors from WP") {
    val msg = Base16.decode("82dbfccc40aa9919d21dd2bad90935ec44db013738592466e5dad1fa051cb4ff").get
    val nonce = Base16.decode("E8F2800001A12388").get
    val height = 5090


    val h = Ints.toByteArray(height)

    val pow = new AutolykosPowScheme(32, 26)

    val N = pow.calcN(2, height)

    val prei8 = BigIntegers.fromUnsignedByteArray(hash(Bytes.concat(msg, nonce)).takeRight(8))
    val i = BigIntegers.asUnsignedByteArray(4, prei8.mod(BigInt(N).underlying()))
    val f = Blake2b256(Bytes.concat(i, h, pow.M)).drop(1) // .drop(1) is the same as takeRight(31)
    val seed = Bytes.concat(f, msg, nonce) // Autolykos v1, Alg. 2, line4:

    println("seed: " + Base16.encode(seed))

    val indexes = pow.genIndexes(seed, N)
    //pk and w not used in v2
    val elems = indexes.map(idx => pow.genElement(2, msg, null, null, Ints.toByteArray(idx), h))
    val f2 = elems.sum

    println("f2 (table elems sum): " + f2)

    // sum as byte array is always about 32 bytes
    val array: Array[Byte] = BigIntegers.asUnsignedByteArray(32, f2.underlying())
    val hf = toBigInt(hash(array))

    println("hf: " + hf)
  }