From Zero to Blockchain in Python - Part 1 - Transaction

transaction.py

import time


class Transaction:
    def __init__(self, sender, recipient, amount):
        """
        Creates a new transaction

        :param sender: <str> sender account
        :param recipient: <str> recipient account
        :param amount: <float> amount to be transferred
        """
        self.sender = sender
        self.recipient = recipient
        self.timestamp = time.time()
        self.amount = amount

    def validate(self):
        """
        Checks if a transaction is valid

        :return: <bool> True if it is valid, False if not.
        """

        # Prevent stealing by creating negative transactions
        if self.amount < 0:
            return False

        return True