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generate Ethereum address by Ruby
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}"