package main

import (
	"fmt"
	"github.com/skycoin/skycoin/src/cipher"
	"log"
)

func main() {

	// This is your private/public key pair. You give them the public key
	pubkey1, seckey1, err := cipher.GenerateDeterministicKeyPair([]byte("Password"))
	if err != nil {
		log.Fatal(err)
	}
	// This is their key pair
	pubkey2, seckey2 := cipher.GenerateKeyPair()

	// They communicate pubkey2, by for instance using it as the first destination for coins in a transaction
	// You know pubkey2, and seckey1/pubkey1
	// They know your pubkey, pubkey1 and know their seckey seckey2/pubkey2

	// Your computer
	// Use your private key and the pubkey they gave you
	secret1, err := cipher.ECDH(pubkey2, seckey1)
	if err != nil {
		log.Fatal(err)
	}

	// Their computer
	// They use your pubkey and their private key
	secret2, err := cipher.ECDH(pubkey1, seckey2)
	if err != nil {
		log.Fatal(err)
	}

	// Now you may compute an address from the secrets
	pubkey3, _, err := cipher.GenerateDeterministicKeyPair(secret1)
	if err != nil {
		log.Fatal(err)
	}
	address1 := cipher.AddressFromPubKey(pubkey3) // send coins here

	// Now you may compute an address from the them
	pubkey4, _, err := cipher.GenerateDeterministicKeyPair(secret2)
	if err != nil {
		log.Fatal(err)
	}
	address2 := cipher.AddressFromPubKey(pubkey4) // send coins here

	if address1 == address2 {
		fmt.Printf("%s\n%s", address1, address2)
	} else {
		fmt.Println("Addresses don't match!")
	}
}