module Ethereum::Base::Utils

Public Instance Methods

big_endian_to_int(s) click to toggle source
# File lib/ethereum/base/utils.rb, line 36
def big_endian_to_int(s)
  RLP::Sedes.big_endian_int.deserialize s.sub(/\A(\x00)+/, '')
end
bytearray_to_int(arr) click to toggle source
# File lib/ethereum/base/utils.rb, line 116
def bytearray_to_int(arr)
  o = 0
  arr.each {|x| o = (o << 8) + x }
  o
end
bytes_to_int_array(bytes) click to toggle source
# File lib/ethereum/base/utils.rb, line 126
def bytes_to_int_array(bytes)
  bytes.unpack('C*')
end
ceil32(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 82
def ceil32(x)
  x % 32 == 0 ? x : (x + 32 - x%32)
end
coerce_addr_to_hex(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 150
def coerce_addr_to_hex(x)
  if x.is_a?(Numeric)
    encode_hex zpad(int_to_big_endian(x), 20)
  elsif x.size == 40 || x.size == 0
    x
  else
    encode_hex zpad(x, 20)[-20..-1]
  end
end
coerce_to_bytes(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 140
def coerce_to_bytes(x)
  if x.is_a?(Numeric)
    int_to_big_endian x
  elsif x.size == 40
    decode_hex(x)
  else
    x
  end
end
coerce_to_int(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 130
def coerce_to_int(x)
  if x.is_a?(Numeric)
    x
  elsif x.size == 40
    big_endian_to_int decode_hex(x)
  else
    big_endian_to_int x
  end
end
decode_hex(s) click to toggle source
# File lib/ethereum/base/utils.rb, line 24
def decode_hex(s)
  RLP::Utils.decode_hex s
end
decode_int(v) click to toggle source
# File lib/ethereum/base/utils.rb, line 111
def decode_int(v)
  raise ArgumentError, "No leading zero bytes allowed for integers" if v.size > 0 && (v[0] == Constant::BYTE_ZERO || v[0] == 0)
  big_endian_to_int v
end
decode_rlp(s) click to toggle source
# File lib/ethereum/base/utils.rb, line 32
def decode_rlp(s)
  RLP.decode s
end
encode_hex(b) click to toggle source
# File lib/ethereum/base/utils.rb, line 20
def encode_hex(b)
  RLP::Utils.encode_hex b
end
encode_int(n) click to toggle source
# File lib/ethereum/base/utils.rb, line 106
def encode_int(n)
  raise ArgumentError, "Integer invalid or out of range: #{n}" unless n.is_a?(Integer) && n >= 0 && n <= UINT_MAX
  int_to_big_endian n
end
encode_rlp(b) click to toggle source
# File lib/ethereum/base/utils.rb, line 28
def encode_rlp(b)
  RLP.encode b
end
hash160(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 70
def hash160(x)
  ripemd160 sha256(x)
end
hash160_hex(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 74
def hash160_hex(x)
  encode_hex hash160(x)
end
int_array_to_bytes(arr) click to toggle source
# File lib/ethereum/base/utils.rb, line 122
def int_array_to_bytes(arr)
  arr.pack('C*')
end
int_to_addr(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 102
def int_to_addr(x)
  zpad_int x, 20
end
int_to_big_endian(n) click to toggle source
# File lib/ethereum/base/utils.rb, line 40
def int_to_big_endian(n)
  RLP::Sedes.big_endian_int.serialize n
end
keccak256(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 8
def keccak256(x)
  Digest::SHA3.new(256).digest(x)
end
keccak256_rlp(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 16
def keccak256_rlp(x)
  keccak256 RLP.encode(x)
end
keccak512(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 12
def keccak512(x)
  Digest::SHA3.new(512).digest(x)
end
normalize_hex_without_prefix(s) click to toggle source
# File lib/ethereum/base/utils.rb, line 58
def normalize_hex_without_prefix(s)
  if s[0,2] == '0x'
    (s.size % 2 == 1 ? '0' : '') + s[2..-1]
  else
    s
  end
end
parse_int_or_hex(s) click to toggle source
# File lib/ethereum/base/utils.rb, line 48
def parse_int_or_hex(s)
  if s.is_a?(Numeric)
    s
  elsif s[0,2] == '0x'
    big_endian_to_int decode_hex(normalize_hex_without_prefix(s))
  else
    s.to_i
  end
end
remove_0x_head(s) click to toggle source
# File lib/ethereum/base/utils.rb, line 44
def remove_0x_head(s)
  s[0,2] == '0x' ? s[2..-1] : s
end
ripemd160(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 66
def ripemd160(x)
  Digest::RMD160.digest x
end
sha256(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 4
def sha256(x)
  Digest::SHA256.digest x
end
to_signed(i) click to toggle source
# File lib/ethereum/base/utils.rb, line 78
def to_signed(i)
  i > Constant::INT_MAX ? (i-Constant::TT256) : i
end
zpad(x, l) click to toggle source
# File lib/ethereum/base/utils.rb, line 86
def zpad(x, l)
  lpad x, BYTE_ZERO, l
end
zpad_hex(s, l=32) click to toggle source
# File lib/ethereum/base/utils.rb, line 98
def zpad_hex(s, l=32)
  zpad decode_hex(s), l
end
zpad_int(n, l=32) click to toggle source
# File lib/ethereum/base/utils.rb, line 94
def zpad_int(n, l=32)
  zpad encode_int(n), l
end
zunpad(x) click to toggle source
# File lib/ethereum/base/utils.rb, line 90
def zunpad(x)
  x.sub /\A\x00+/, ''
end