def __init__(self):

self.chain = [self.create_genesis_block()]

self.difficulty = 4 Adjust difficulty here

self.pending_transactions = []

def create_genesis_block(self):

return Block(0, time.time(), "Genesis Block", "0")

def get_latest_block(self):

return self.chain[1]

def add_block(self, new_block):

new_block.previous_hash = self.get_latest_block().hash

new_block.mine_block(self.difficulty)

self.chain.append(new_block)

def add_transaction(self, sender, receiver, amount):

self.pending_transactions.append({"sender": sender, "receiver": receiver, "amount": amount})

def mine_pending_transactions(self, miner_reward_address):

block = Block(len(self.chain), time.time(), self.pending_transactions, self.get_latest_block().hash)

block.mine_block(self.difficulty)