sidef-scripts/Blockchain/main.sf

#!/usr/bin/ruby

include Blockchain
include SigningKey

import Blockchain::Blockchain
import Blockchain::Transaction
import SigningKey::SigningKey

# Your private key goes here
var myKey = SigningKey()

# Another key
var evilKey = SigningKey()

STDERR.printf("Your private key: %s\n", myKey.getPrivate)

# From that we can calculate your public key (which doubles as your wallet address)
var myWalletAddress = myKey.getPublic

# Create new instance of Blockchain class
var sidefCoin = Blockchain(difficulty: 2)

# Mine first block
sidefCoin.minePendingTransactions(myWalletAddress)

# Create a transaction & sign it with your key
const tx1 = Transaction(myWalletAddress, evilKey.getPublic, 100)
tx1.signTransaction(myKey)
#tx1.signTransaction(evilKey)
sidefCoin.addTransaction(tx1)

# Mine block
sidefCoin.minePendingTransactions(myWalletAddress)

# Create second transaction
const tx2 = Transaction(myWalletAddress, evilKey.getPublic, 50)
tx2.signTransaction(myKey)
sidefCoin.addTransaction(tx2)

# Mine block
sidefCoin.minePendingTransactions(evilKey.getPublic)

# Create third transaction
const tx3 = Transaction(evilKey.getPublic, myWalletAddress, 10)
tx3.signTransaction(evilKey)
sidefCoin.addTransaction(tx3)

# Mine block
sidefCoin.minePendingTransactions(myWalletAddress)

STDERR.say("\nMy balance is: #{sidefCoin.getBalanceOfAddress(myWalletAddress)}")
STDERR.say("Evil balance is: #{sidefCoin.getBalanceOfAddress(evilKey.getPublic)}")

# Uncomment this line if you want to test tampering with the chain
#sidefCoin.chain[1].transactions[0].amount = 10;

# Check if the chain is valid
STDERR.say("\nBlockchain valid? ", sidefCoin.isChainValid() ? 'Yes' : 'No')