class Ethereum::EthashRuby::Cache

Public Class Methods

new(block_number) click to toggle source
# File lib/ethereum/ethash_ruby/cache.rb, line 10
def initialize(block_number)
  @block_number = block_number
end

Public Instance Methods

seed() click to toggle source
# File lib/ethereum/ethash_ruby/cache.rb, line 31
def seed
  @seed ||= self.class.get_seed(@block_number)
end
size() click to toggle source
# File lib/ethereum/ethash_ruby/cache.rb, line 35
def size
  sz = CACHE_BYTES_INIT + CACHE_BYTES_GROWTH * (@block_number / EPOCH_LENGTH)
  sz -= HASH_BYTES

  sz -= 2 * HASH_BYTES while !Prime.prime?(sz / HASH_BYTES)
  sz
end
to_a() click to toggle source
# File lib/ethereum/ethash_ruby/cache.rb, line 14
def to_a
  n = size / HASH_BYTES

  o = [keccak512(seed)]
  (1...n).each {|i| o.push keccak512(o.last) }

  CACHE_ROUNDS.times do
    n.times do |i|
      v = o[i][0] % n
      xor = o[(i-1+n) % n].zip(o[v]).map {|(a,b)| a^b }
      o[i] = keccak512 xor
    end
  end

  o
end