Module: Nano::Util

Defined in:
lib/nano/wallet/util.rb

Constant Summary collapse

ALLOWED_CHARS = 
'13456789abcdefghijkmnopqrstuwxyz'.freeze

Class Method Summary collapse

Class Method Details

.bin_to_hex(bin) ⇒ Object 



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# File 'lib/nano/wallet/util.rb', line 9

def self.bin_to_hex(bin)
  bin.unpack('H*').first
end

.encode(bytes) ⇒ Object 



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# File 'lib/nano/wallet/util.rb', line 22

def self.encode(bytes)
  length = bytes.length
  leftover = (length * 8) % 5
  offset = leftover == 0 ? 0 : 5 - leftover

  value = 0
  output = ""
  bits = 0

  length.times do |i|
    value = (value << 8) | bytes[i]
    bits += 8

    while (bits >= 5)
      output += ALLOWED_CHARS[(value >> (bits + offset - 5)) & 31]
      bits -= 5
    end
  end

  if bits > 0
    output += ALLOWED_CHARS[(value << (5 - (bits + offset))) & 31]
  end

  output
end

.hex_to_bin(hex) ⇒ Object 



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# File 'lib/nano/wallet/util.rb', line 5

def self.hex_to_bin(hex)
  hex.scan(/../).map { |x| x.hex }.pack('C*')
end

.public_key_to_address(prefix, public_key) ⇒ Object 



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# File 'lib/nano/wallet/util.rb', line 13

def self.public_key_to_address(prefix, public_key)
  key_bytes = public_key.unpack('C*')
   = self.encode(key_bytes)
  checksum_bytes = Blake2b.bytes(public_key, Blake2b::Key.none, 5).reverse
  checksum = self.encode(checksum_bytes)

  "#{prefix}_#{}#{checksum}"
end