class Client:
"""
Test Client
Something like Controller.
Here I create blockchain and wallets
"""
def __init__(self):
"""
"""
self.wallets = {}
# Initialise wallets of participaters
# And give 100 Nicecoins to each of them
self.walletA = self.registerWallet(Wallet(100))
self.walletB = self.registerWallet(Wallet(100))
# Init Nicecoin BlockChain
genesisBlock = Block([], 0)
self.blockchain = Blockchain(genesisBlock)
# It is handler that will execute when transaction will be succeeded
def onBlockReadyHandler(transactions):
print("[Transacton completed]")
for transaction in transactions:
wallet = self.wallets[transaction.recipient_address]
if (wallet is not None):
print("W: %s gain: %d" %
(transaction.recipient_address, transaction.amount))
wallet.amount = wallet.amount + transaction.amount
self.debug()
self.blockchain.addOnBlockReadyHandler(onBlockReadyHandler)
def initTransactions(self):
# Create transfers between wallets
# Add transactions in blockchain
self.debug()
self.trans1 = self.walletA.transfer(self.walletB.address, 10)
self.trans2 = self.walletB.transfer(self.walletA.address, 20)
trans3 = self.walletB.transfer(self.walletA.address, 5)
# The transacton instance may be equal to None if there wer not enough money in wallet
if self.trans1 != None and self.blockchain.addTransaction(self.trans1):
print "Trans1 was successfully added"
if self.trans2 != None and self.blockchain.addTransaction(self.trans2):
print "Trans2 was successfully added"
if trans3 != None and self.blockchain.addTransaction(trans3):
print "Trans3 was successfully added"
self.examineDuplicationTransactions()
# Display changes in wallets
self.debug()
# Try to add trans1
def examineDuplicationTransactions(self):
# Examine duplications
if self.trans2 != None and self.blockchain.addTransaction(self.trans2):
# Fail
print "Copy of Trans2 was successfully added!!!"
else:
print "Copy of Trans2 was rejected"
def addBlock(self):
block, computeTime = self.blockchain.addBlock()
print("[Add Block] # %d %s %f" %
(block.index, block.hash, computeTime))
self.debug()
def debug(self):
print("[D] A: %d NC, B: %d NC, #trans: %d" %
(self.walletA.amount, self.walletB.amount,
len(self.blockchain.transactions)))
def dump(self):
print("[Blockchain]")
for block in self.blockchain.chain:
print("# %d %s" % (block.index, block.hash))
def registerWallet(self, wallet):
self.wallets[wallet.address] = wallet
return wallet
