class Address

# File lib/substrate_common/address.rb, line 34
def array_to_hex_string(arr)
  body = arr.map { |i| i.to_s(16).rjust(2, '0') }.join
  "0x#{body}"
end

# File lib/substrate_common/address.rb, line 39
def decode(address, addr_type = 42, ignore_checksum = true)
  decoded = Base58.base58_to_binary(address, :bitcoin)
  is_pubkey = decoded.size == 35

  size = decoded.size - ( is_pubkey ? 2 : 1 )

  prefix = decoded[0, 1].unpack("C*").first

  raise "Invalid address type" unless TYPES.include?(addr_type)
  
  hash_bytes = make_hash(decoded[0, size])
  if is_pubkey
    is_valid_checksum = decoded[-2].unpack("C*").first == hash_bytes[0] && decoded[-1].unpack("C*").first == hash_bytes[1]
  else
    is_valid_checksum = decoded[-1].unpack("C*").first == hash_bytes[0]
  end

  raise "Invalid decoded address checksum" unless is_valid_checksum && ignore_checksum

  decoded[1...size].unpack("H*").first
end

# File lib/substrate_common/address.rb, line 62
def encode(pubkey, addr_type = 42)
  pubkey = pubkey[2..-1] if pubkey =~ /^0x/i
  key = [pubkey].pack("H*")

  u8_array = key.bytes

  u8_array.unshift(addr_type)

  bytes = make_hash(u8_array.pack("C*"))
  
  checksum = bytes[0, key.size == 32 ? 2 : 1]

  u8_array.push(*checksum)

  input = u8_array.pack("C*")

  Base58.binary_to_base58(input, :bitcoin)
end

# File lib/substrate_common/address.rb, line 81
def make_hash(body)
  Blake2b.bytes("#{SS58_PREFIX}#{body}", Blake2b::Key.none, 64)
end