module Tapyrus::Base58
Base58Check encoding en.bitcoin.it/wiki/Base58Check_encoding
Constants
- ALPHABET
- SIZE
Public Instance Methods
decode(base58_val)
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decode base58 string to hex value.
# File lib/tapyrus/base58.rb, line 23 def decode(base58_val) int_val = 0 base58_val .reverse .split(//) .each_with_index do |char, index| raise ArgumentError, 'Value passed not a valid Base58 String.' if (char_index = ALPHABET.index(char)).nil? int_val += char_index * (SIZE**index) end s = int_val.to_even_length_hex s = '' if s == '00' leading_zero_bytes = (base58_val.match(/^([1]+)/) ? $1 : '').size s = ('00' * leading_zero_bytes) + s if leading_zero_bytes > 0 s end
encode(hex)
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encode hex value to base58 string.
# File lib/tapyrus/base58.rb, line 11 def encode(hex) leading_zero_bytes = (hex.match(/^([0]+)/) ? $1 : '').size / 2 int_val = hex.to_i(16) base58_val = '' while int_val > 0 int_val, remainder = int_val.divmod(SIZE) base58_val = ALPHABET[remainder] + base58_val end ('1' * leading_zero_bytes) + base58_val end