Python transaction.Transaction类代码示例

 def endow_labour(self,  environment, time):
     # We make sure household get their labour endowment per step
     for household in environment.households:
         # First, we set a control variable that makes sure we have exactly
         # one transaction with "manhours", though this should in general
         # be the case, this should always run through the second if
         check = 0
         for tranx in household.accounts:
             if tranx.type_ == "manhours":
                 check = check + 1  # We check how many transactions with manhours are there for the household
         # If there are no "manhours" transactions then we create one and add it to the household's accounts
         if check == 0:
             # The amount is equal to the parameter read from the config of the household
             amount = household.labour
             # We create the transaction
             transaction = Transaction()
             # We add the appropriate values to the transaction
             transaction.this_transaction("manhours", "", household.identifier, household.identifier, amount, 0,  0, -1)
             # It's important to add the transaction using the method
             # from Transaction class and not manually
             transaction.add_transaction(environment)
         else:
             # If we have more than one "mahhours" transaction we raise an error
             raise LookupError("Labour transactions for a household haven't been properly removed.")
     logging.info("  labour endowed on step: %s",  time)

    def add_transaction(self, type_, asset, from_id, to_id, amount, interest, maturity, time_of_default):
        from src.transaction import Transaction

        transaction = Transaction()
        transaction.this_transaction(type_, asset, from_id, to_id, amount, interest, maturity, time_of_default)
        self.accounts.append(transaction)
        del transaction  # append() above does make a copy so we may delete for garbage collection

 def make_deposits(self,  environment, time):
     for household in environment.households:
         cash = 0.0  # total of cash available for the household
         control_deposits = 0  # checking if the household already has deposits
         # We calculate the available cash
         for tranx in household.accounts:
             if tranx.type_ == "cash":
                 cash = cash + tranx.amount
                 tranx.amount = 0
         # And the number of existing deposits
             if tranx.type_ == "deposits":
                 control_deposits = control_deposits + 1
         # And move all available cash to deposits at the end of the step
         # If there are no deposits we create one in a bank
         # The bank is chosen randomly
         if control_deposits == 0:
             # We choose a bank randomly
             random_bank = random.choice(environment.banks)
             # Create a transaction
             transaction = Transaction()
             # Add the appropriate values to the transaction
             transaction.this_transaction("deposits", "",  household.identifier, random_bank,
                                          amount, random_bank.interest_rate_deposits,  0, -1)
             # And add the transaction to the books (do it through function/not manually)
             transaction.add_transaction(environment)
         # If there are previous deposits we expand them linearly
         else:
             for tranx in household.accounts:
                 if tranx.type_ == "deposits":
                     # We add the remaining cash to the existing deposits
                     # in equal proportions
                     # Perhaps this can be done proportionate with regards
                     # to the value of these deposits, but it's minor at this point
                     tranx.amount = tranx.amount + (cash/control_deposits)
     logging.info("  deposits made on step: %s",  time)

    def transaction__get_time_of_default(self, args):
        import os
        from src.bank import Bank
        from src.household import Household
        from src.firm import Firm
        from src.environment import Environment
        from src.transaction import Transaction

        text = "This test checks transaction.get_time_of_default \n"
        self.print_info(text)
        #
        # INITIALIZATION
        #
        environment_directory = str(args[0])
        identifier = str(args[1])
        log_directory = str(args[2])

        # Configure logging parameters so we get output while the program runs
        logging.basicConfig(format='%(asctime)s %(message)s', datefmt='%m/%d/%Y %H:%M:%S',
                            filename=log_directory + identifier + ".log", level=logging.INFO)
        logging.info('START logging for test transaction__get_time_of_default in run: %s',
                     environment_directory + identifier + ".xml")

        # Construct household filename
        environment = Environment(environment_directory,  identifier)

        #
        # TESTING
        #

        print("Creating a transaction")
        transaction = Transaction()
        transaction.time_of_default = 1
        print("Time of default: ")
        print(transaction.get_time_of_default())

    def transaction__add_transaction(self, args):
        import os
        from src.bank import Bank
        from src.household import Household
        from src.firm import Firm
        from src.environment import Environment
        from src.transaction import Transaction

        text = "This test checks transaction.add_transaction \n"
        self.print_info(text)
        #
        # INITIALIZATION
        #
        environment_directory = str(args[0])
        identifier = str(args[1])
        log_directory = str(args[2])

        # Configure logging parameters so we get output while the program runs
        logging.basicConfig(format='%(asctime)s %(message)s', datefmt='%m/%d/%Y %H:%M:%S',
                            filename=log_directory + identifier + ".log", level=logging.INFO)
        logging.info('START logging for test transaction__add_transaction in run: %s',
                     environment_directory + identifier + ".xml")

        # Construct household filename
        environment = Environment(environment_directory,  identifier)

        # generate a bank
        bank = Bank()
        bank.identifier = "test_bank"
        environment.banks.append(bank)

        # generate a firm
        firm = Firm()
        firm.identifier = "test_firm"
        environment.firms.append(firm)

        # generate a household
        household = Household()
        household.identifier = "test_household"
        environment.households.append(household)

        #
        # TESTING
        #

        print("Creating a transaction")
        transaction = Transaction()
        print("Assigning values")
        transaction.this_transaction("type", "asset", "test_household", "test_firm", 1,  2,  3, 4)
        print("Adding the transaction to the books")
        transaction.add_transaction(environment)
        print("The transaction:")
        print(transaction)
        print("The firm:")
        print(environment.get_agent_by_id("test_firm"))
        print("The household:")
        print(environment.get_agent_by_id("test_household"))

    def transfer_required_deposits(self):
        from src.transaction import Transaction

        transaction = Transaction()
        value = round(float(self.parameters["r"]*self.get_account("D")), 4)
        transaction.this_transaction("rD",  self.identifier,  -3,  value,  self.parameters["rb"],  0,  -1)
        self.accounts.append(transaction)

        return -1.0*value

    def initialize_standard_firm(self, firm, environment):
        from src.transaction import Transaction

        firm.identifier = "standard_firm_id"  # identifier
        firm.parameters["productivity"] = 1.20  # how much goods do we get from 1 unit of labour

        # loans - we get the first bank from the list of banks
        # if there are no banks it will be a blank which is fine for testing
        amount = 250.0
        transaction = Transaction()
        transaction.this_transaction("loans", "", environment.banks[0:1][0], firm.identifier,
                                     amount,  environment.banks[0:1][0].interest_rate_loans,  0, -1)
        # environment.banks[0:1][0] is only for testing purposes DO NOT USE IN PRODUCTION
        # what it does is is takes the first bank in environment, but if there are no
        # banks (which happens in testing) it doesn't break down
        firm.accounts.append(transaction)

        # money - cash and equivalents
        amount = 200.0
        transaction = Transaction()
        transaction.this_transaction("cash", "", firm.identifier, firm.identifier, amount,  0,  0, -1)
        firm.accounts.append(transaction)

        # goods - unique production
        amount = 50.0
        transaction = Transaction()
        transaction.this_transaction("goods", "", firm.identifier, firm.identifier, amount,  0,  0, -1)
        firm.accounts.append(transaction)

    def initialize_standard_bank(self, bank, environment):
        from src.transaction import Transaction

        bank.identifier = "standard_bank_id"

        # deposits - we get the first household from the list of households
        # if there are no households it will be a blank which is fine for testing
        amount = 250.0
        transaction = Transaction()
        transaction.this_transaction("deposits", "", environment.households[0:1][0], bank.identifier,
                                     amount,  bank.interest_rate_deposits,  0, -1)
        # environment.households[0:1][0] is only for testing purposes DO NOT USE IN PRODUCTION
        # what it does is is takes the first household in environment, but if there are no
        # households (which happens in testing) it doesn't break down
        bank.accounts.append(transaction)

        # money - cash and equivalents
        amount = 100.0
        transaction = Transaction()
        transaction.this_transaction("cash", "", bank.identifier, bank.identifier,
                                     amount,  0,  0, -1)
        bank.accounts.append(transaction)

        # loans - we get the first firm from the list of firms
        # if there are no firms it will be a blank which is fine for testing
        amount = 150.0
        transaction = Transaction()
        transaction.this_transaction("loans", "", bank.identifier, environment.firms[0:1][0],
                                     amount,  bank.interest_rate_loans,  0, -1)
        # environment.firms[0:1][0] is only for testing purposes DO NOT USE IN PRODUCTION
        # what it does is is takes the first firm in environment, but if there are no
        # firms (which happens in testing) it doesn't break down
        bank.accounts.append(transaction)

    def initialize_standard_household(self, household, environment):
        from src.transaction import Transaction

        household.identifier = "standard_household_id"  # identifier
        household.parameters["labour"] = 24.00  # labour to sell per step
        household.parameters["propensity_to_save"] = 0.40  # propensity to save
        # percentage of income household wants to save as deposits

        # deposits - we get the first bank from the list of banks
        # if there are no banks it will be a blank which is fine for testing
        amount = 200.0
        transaction = Transaction()
        transaction.this_transaction("deposits", "",  household.identifier, environment.banks[0:1][0],
                                     amount, environment.banks[0:1][0].interest_rate_deposits,  0, -1)
        # environment.banks[0:1][0] is only for testing purposes DO NOT USE IN PRODUCTION
        # what it does is is takes the first bank in environment, but if there are no
        # banks (which happens in testing) it doesn't break down
        household.accounts.append(transaction)

        # money - cash and equivalents
        amount = 50.0
        transaction = Transaction()
        transaction.this_transaction("cash", "", household.identifier, household.identifier, amount, 0,  0, -1)
        household.accounts.append(transaction)

        # manhours - labour to sell
        amount = 250.0
        transaction = Transaction()
        transaction.this_transaction("manhours", "", household.identifier, household.identifier, amount, 0,  0, -1)
        household.accounts.append(transaction)

 def transfer_excess_reserves(self):
     from src.transaction import Transaction
     availableVolume = self.parameters["Q"]
     plannedVolume = self.parameters["gamma"]*(1.0-self.parameters["lamb"])*self.parameters["V"]
     transactionVolume = round(min(plannedVolume,  availableVolume), 4)
     self.parameters["Q"] = round(self.parameters["Q"] - transactionVolume, 4)
     if (self.parameters["Q"] < 0.0):
         logging.info("ERROR: Q negative in transfer_excess_reserves")
     transaction = Transaction()
     transaction.this_transaction("E",  self.identifier, -3,  transactionVolume,  self.parameters["rb"],  0,  -1)
     self.accounts.append(transaction)
     del transaction

 def do_update(self,  environment,  time):
     # As a first step, we accrue all interest over the transactions
     # Thus, important to notice to keep 0 as interest by default
     # Unless transaction should carry interest
     # DON'T DO INTERESTS SO FAR, DO ONCE THE REST WORKS
     self.accrue_interests(environment, time)
     # Then agents get their labour endowment for the step (e.g. work hours to spend)
     # For now we don't need to keep track of labour left as there is no queue
     # self.endow_labour(environment, time)
     # The households sell labour to firms
     self.sell_labour(environment, time)
     # The firms sell goods to households
     self.consume_rationed(environment, time)
     # We net deposits and loans
     self.net_loans_deposits(environment, time)
     # We remove goods and labour (perishable) and are left with capital
     self.net_labour_goods(environment, time)
     # Purging accounts at every step just in case
     transaction = Transaction()
     transaction.purge_accounts(environment)

 def do_update(self, environment, time):
     # As a first step, we accrue all interest over the transactions
     # Thus, important to notice to keep 0 as interest by default
     # Unless transaction should carry interest
     self.accrue_interests(environment, time)
     # The households sell labour to firms
     self.sell_labour(environment, time)
     # The firms sell goods to households
     self.consume_rationed(environment, time)
     # We net deposits and loans
     self.net_loans_deposits(environment, time)
     # We remove the perishable transactions
     self.remove_perishable(environment, time)
     # And add capital to balance the books
     self.capitalise(environment, time)
     # Investing of the banks
     self.invest(environment, time)
     # Purging accounts at every step just in case
     transaction = Transaction()
     transaction.purge_accounts(environment)

def find_incoming_utxos(block_hash, transactions, isGenesis=False):
    """
    Iterates through all the outputs and looks for any directed to user's wallet.
    If found, save to the utxo pool
    :return:
    """
    myAddress = SHA256.new(get_public_key("string").encode()).hexdigest()
    conf = Configuration()
    for tnx_id, tnx_info in transactions.items():
        # deserialize transaction
        tnx_payload = tnx_info
        tnx_payload["transaction_id"] = tnx_id
        tnx = Transaction(payload=tnx_payload)

        for index in range(len(tnx.outputs)):
            if tnx.outputs[index]["address"] == myAddress and not isGenesis:
                save_utxo(tnx.get_transaction_id(), index, block_hash, tnx.outputs[index]["amount"])
                conf.add_balance(tnx.outputs[index]["amount"])
            elif tnx.outputs[index]["address"] == myAddress and isGenesis:
                save_utxo(tnx.get_transaction_id(), -1, block_hash, tnx.outputs[index]["amount"])
                conf.add_balance(tnx.outputs[index]["amount"])

 def produce(self,  environment, time):
     # We take all the labour and turn it into goods
     for firm in environment.firms:  # We do it for every firm
         production_factors = 0  # Here, we count how much labour the firm has
         for tranx in firm.accounts:
             if tranx.type_ == "manhours":
                 # We move the labour to production as a production factor
                 # First, we move it to production factors used below
                 # Then we will remove it from the books
                 production_factors = production_factors + tranx.amount
         # Amount produced is labour * productivity in this simple model
         amount = production_factors * firm.productivity
         # Create a transaction
         transaction = Transaction()
         # Add the appropriate values to the transaction
         transaction.this_transaction("goods", "",  firm.identifier, firm.identifier,
                                      amount, 0,  0, -1)
         # And add the transaction to the books (do it through function/not manually)
         transaction.add_transaction(environment)
     # Finally, we remove all the labour that was used in production
     # from the books of the firms
     self.remove_labour_firms(environment, time)
     logging.info("  goods produced on step: %s",  time)

def create_transaction(recipient, amount):
    """
    creates a new transaction and add it to verified_transactions.json
    :param recipient: public address of the recipient
    :param amount: the amount of abc to be sent
    :return: None
    """
    # TODO: Send a success message to client
    conf = Configuration()
    try:
        tx = Transaction()
        tx.add_output(recipient, amount)
        tx.unlock_inputs(get_private_key(), get_public_key("string"))
        save_verified_transaction(tx.get_transaction_id(), tx.get_data())
        conf.subtract_balance(tx.sum_of_outputs())
    except ValueError as e:
        # Will raise if insufficient utxos are found
        raise ValueError("INSUFFICIENT FUNDS")