import logging from decimal import Decimal from huey import crontab from huey.contrib.djhuey import periodic_task from django.conf import settings from django.core.mail import send_mail from django.template.loader import render_to_string from django.urls import reverse from core.monero import AuctionWallet from core.models import UserShippingAddress from sales.models import ItemSale logger = logging.getLogger('django.server') class EmailTemplate: def __init__(self, item, scenario, role): context = { 'sale': item, 'site_name': settings.SITE_NAME, 'site_url': settings.SITE_URL, 'sale_path': reverse('get_sale', args=[item.id]) } subject = render_to_string( template_name=f'sales/notify/{scenario}/{role}/subject.txt', context=context, request=None ) body = render_to_string( template_name=f'sales/notify/{scenario}/{role}/body.txt', context=context, request=None ) self.subject = ''.join(subject.splitlines()) self.body = body self.role = role self.item = item def send(self): if self.role == 'buyer': to_address = self.item.bid.bidder.email else: to_address = self.item.item.owner.email res = send_mail( self.subject, self.body, settings.DEFAULT_FROM_EMAIL, [to_address] ) return res ### Notifications @periodic_task(crontab(minute='*')) def notify_buyer_of_pending_sale(): item_sales = ItemSale.objects.filter(buyer_notified=False, sale_cancelled=False) for sale in item_sales: logger.info(f'[INFO] Sale #{sale.id} just created, notifying buyer.') email_template = EmailTemplate( item=sale, scenario='sale_created', role='buyer' ) email_template.send() sale.buyer_notified = True sale.save() @periodic_task(crontab(minute='*')) def notify_seller_of_funds_received(): item_sales = ItemSale.objects.filter(seller_notified=False, buyer_notified=True).filter(payment_received=True) for sale in item_sales: logger.info(f'[INFO] Funds received from buyer for sale #{sale.id}, notifying seller.') email_template = EmailTemplate( item=sale, scenario='funds_received', role='seller' ) email_template.send() sale.seller_notified = True sale.save() @periodic_task(crontab(minute='*')) def notify_buyer_of_shipment_confirmation(): item_sales = ItemSale.objects.filter(item_shipped=True).filter(buyer_notified_of_shipment=False) for sale in item_sales: logger.info(f'[INFO] Item shipped for sale #{sale.id}, notifying buyer.') email_template = EmailTemplate( item=sale, scenario='item_shipped', role='buyer' ) email_template.send() bidder_profile = UserShippingAddress.objects.get(user=sale.bid.bidder) bidder_profile.delete() logger.info(f'[INFO] Buyer shipping info wiped for sale #{sale.id}') sale.buyer_notified_of_shipment = True sale.save() ### Payments @periodic_task(crontab(minute='*')) def poll_for_buyer_escrow_payments(): aw = AuctionWallet() if aw.connected is False: logging.error('Auction wallet is not connected. Quitting.') return False item_sales = ItemSale.objects.filter(payment_received=False) for sale in item_sales: logger.info(f'[INFO] Polling escrow address #{sale.escrow_account_index} for sale #{sale.id} for new funds.') sale_account = aw.wallet.accounts[sale.escrow_account_index] unlocked = sale_account.balances()[1] sale.received_payment_xmr = unlocked if unlocked >= Decimal(str(sale.expected_payment_xmr)): logger.info(f'[INFO] Found payment of {sale.received_payment_xmr} XMR for sale #{sale.id}.') sale.payment_received = True sale.save() @periodic_task(crontab(minute='*/5')) def pay_sellers_on_sold_items(): aw = AuctionWallet() if aw.connected is False: logging.error('Auction wallet is not connected. Quitting.') return False item_sales = ItemSale.objects.filter(item_received=True, payment_received=True).filter(seller_paid=False) for sale in item_sales: # Take platform fees from the sale - the 50:50 split between buyer/seller sale_total = sale.agreed_price_xmr - sale.platform_fee_xmr sale_account = aw.wallet.accounts[sale.escrow_account_index] logger.info(f'[INFO] Sending {sale_total} XMR from wallet account #{sale.escrow_account_index} to item owner\'s payout address for sale #{sale.id}.') if sale_account.balances()[1] > Decimal(sale.agreed_price_xmr): try: sale_account.transfer( sale.item.payout_address, sale_total ) sale.seller_paid = True sale.escrow_complete = True sale.save() except Exception as e: logger.error(f'[ERROR] Unable to pay seller for sale #{sale.id}: ') else: logger.warning(f'[WARNING] Not enough unlocked funds available in account #{sale.escrow_account_index} for sale #{sale.id}.') if sale.seller_paid and sale.seller_notified_of_payout is False: email_template = EmailTemplate( item=sale, scenario='sale_completed', role='seller' ) sent = email_template.send() sale.seller_notified_of_payout = True sale.save() @periodic_task(crontab(minute='*/30')) def pay_platform_on_sold_items(): aw = AuctionWallet() if aw.connected is False: logging.error('Auction wallet is not connected. Quitting.') return False aof = settings.PLATFORM_WALLET_ADDRESS if aof is None: aof = str(aw.wallet.accounts[0].address()) item_sales = ItemSale.objects.filter(escrow_complete=True, seller_paid=True, item_received=True).filter(platform_paid=False) for sale in item_sales: logger.info(f'[INFO] Paying platform fees for sale #{sale.id} to wallet {aof}.') sale_account = aw.wallet.accounts[sale.escrow_account_index] bal = sale_account.balances()[1] if bal >= 0: logger.info(f'[INFO] Getting platform fees of {bal} XMR') try: sale_account.sweep_all(aof) sale.platform_paid = True sale.sale_finalized = True sale.save() return True except Exception as e: logger.error(f'[ERROR] Unable to pay platform for sale #{sale.id} - trying again') else: logger.warning(f'[WARNING] Not enough unlocked funds available in account #{sale.escrow_account_index} for sale #{sale.id}.') @periodic_task(crontab(minute='0', hour='*/12')) def close_completed_items_sales(): item_sales = ItemSale.objects.filter(platform_paid=True, sale_finalized=True) for sale in item_sales: logger.info(f'[INFO] Deleting item #{sale.item.id} and all accompanying bids, sales, meta, etc.') sale.item.delete() @periodic_task(crontab(minute='*')) def closed_cancelled_sales(): aw = AuctionWallet() if aw.connected is False: logging.error('Auction wallet is not connected. Quitting.') return False item_sales = ItemSale.objects.filter(sale_cancelled=True) for sale in item_sales: logger.info(f'[INFO] Deleting sale #{sale.id} and transferring back any sent funds to the buyer.') sale_account = aw.wallet.accounts[sale.escrow_account_index] if sale_account.balances()[0] > Decimal(0.0): try: sale_account.sweep_all(sale.bid.return_address) sale.delete() except Exception as e: logger.error(f'[ERROR] Unable to return funds to use for sale #{sale.id}.') else: sale.delete()