Ruby
Blockchain
Ethereum

Ruby で Ethereum の秘密鍵・アドレスを生成

require 'openssl'
require 'base16'
require 'digest/sha3'

def eth_address(public_key)
    s = public_key[2, 128]
    s.downcase!
    s = Base16.decode16(s)
    h = Digest::SHA3.hexdigest(s, 256)
    a = '0x' + h[-40..-1]
    return a
end

ec = OpenSSL::PKey::EC.new('secp256k1')
ec.generate_key

public_key = ec.public_key.to_bn.to_s(16)
private_key = ec.private_key.to_s(16)
eth_address = eth_address(public_key)

puts "address: #{eth_address}"
puts "private_key: #{private_key}"