Testing darkwallet/stealth.js

test.js

var stealth = require('stealth.js')
var b = require('bitcoinjs-lib')

// Receiver generates a scan and spend keypair
var receiverScanPrivateKey = new b.ECKey(undefined, true)
var receiverScanPublicKey = receiverScanPrivateKey.getPub()

var receiverSpendPrivateKey = new b.ECKey(undefined, true)
var receiverSpendPublicKey = receiverSpendPrivateKey.getPub()

// Sender generates a keypair
var senderRootPrivateKey = new b.ECKey(undefined, true)
var senderRootPublicKey = senderRootPrivateKey.getPub()

// Receiver generates a stealth address

var recipientStealthAddress = stealth.formatAddress(
  receiverScanPublicKey.toBytes(),
  [receiverSpendPublicKey.toBytes()]
)

console.log('Receiver Stealth Address:')
console.log(recipientStealthAddress)

// var parsedStealthAddress = stealth.parseAddress(recipientStealthAddress)

// Now the Sender takes that recipient stealth address, and generates a tx

var newTx = new b.Transaction();
var stealthTx = stealth.addStealth(
  recipientStealthAddress,
  newTx,
  undefined,
  undefined,
  undefined,
  1
);

// {address: recipient, ephemKey: ephemKey, pubKey: pubKey}

console.log('Provided address from addStealth:')
console.log(stealthTx.address.toString())

console.log('Script Hex:')
console.log(b.convert.bytesToHex(newTx.outs[0].script.buffer))

// "terrorism and drugs" http://bit.ly/1rJEprL
newTx.addOutput(stealthTx.address+':'+100000)

var rawTx = b.convert.bytesToHex(newTx.serialize())

console.log('Raw TX:')
console.log(rawTx)

// Now, the recipient finds a OP_RETURN transaction and looks to see if it's ours
// TODO: Figure out how this works, it's in the backend probably. For now, we're cheating.

var discoveredEphemKey = stealthTx.ephemKey

// With the discovered ephem key, we need to derive the private key

var receiverStealthPrivateKey = stealth.uncoverPrivate(
	receiverScanPrivateKey.toBytes(),
	discoveredEphemKey,
	receiverSpendPrivateKey.toBytes()
)

console.log('Uncovered private key:')
console.log(receiverStealthPrivateKey.toWif())
console.log('Uncovered address:')
console.log(receiverStealthPrivateKey.getAddress().toString())