from django.db import models from django.contrib.auth.models import User from django.core.validators import ( MaxValueValidator, MinValueValidator, validate_comma_separated_integer_list, ) from django.db.models.signals import post_save, pre_delete from django.template.defaultfilters import truncatechars from django.dispatch import receiver from django.utils.html import mark_safe import uuid from django.conf import settings from decouple import config from pathlib import Path import json MIN_TRADE = int(config("MIN_TRADE")) MAX_TRADE = int(config("MAX_TRADE")) FEE = float(config("FEE")) BOND_SIZE = float(config("BOND_SIZE")) class Currency(models.Model): currency_dict = json.load(open("frontend/static/assets/currencies.json")) currency_choices = [(int(val), label) for val, label in list(currency_dict.items())] currency = models.PositiveSmallIntegerField(choices=currency_choices, null=False, unique=True) exchange_rate = models.DecimalField( max_digits=14, decimal_places=4, default=None, null=True, validators=[MinValueValidator(0)], ) timestamp = models.DateTimeField(auto_now_add=True) def __str__(self): # returns currency label ( 3 letters code) return self.currency_dict[str(self.currency)] class Meta: verbose_name = "Cached market currency" verbose_name_plural = "Currencies" class LNPayment(models.Model): class Types(models.IntegerChoices): NORM = 0, "Regular invoice" HOLD = 1, "hold invoice" class Concepts(models.IntegerChoices): MAKEBOND = 0, "Maker bond" TAKEBOND = 1, "Taker bond" TRESCROW = 2, "Trade escrow" PAYBUYER = 3, "Payment to buyer" class Status(models.IntegerChoices): INVGEN = 0, "Generated" LOCKED = 1, "Locked" SETLED = 2, "Settled" RETNED = 3, "Returned" CANCEL = 4, "Cancelled" EXPIRE = 5, "Expired" VALIDI = 6, "Valid" FLIGHT = 7, "In flight" SUCCED = 8, "Succeeded" FAILRO = 9, "Routing failed" # payment use details type = models.PositiveSmallIntegerField(choices=Types.choices, null=False, default=Types.HOLD) concept = models.PositiveSmallIntegerField(choices=Concepts.choices, null=False, default=Concepts.MAKEBOND) status = models.PositiveSmallIntegerField(choices=Status.choices, null=False, default=Status.INVGEN) # payment info payment_hash = models.CharField(max_length=100, unique=True, default=None, blank=True, primary_key=True) invoice = models.CharField( max_length=1200, unique=True, null=True, default=None, blank=True) # Some invoices with lots of routing hints might be long preimage = models.CharField(max_length=64, unique=True, null=True, default=None, blank=True) description = models.CharField(max_length=500, unique=False, null=True, default=None, blank=True) num_satoshis = models.PositiveBigIntegerField(validators=[ MinValueValidator(MIN_TRADE * BOND_SIZE), MaxValueValidator(MAX_TRADE * (1 + BOND_SIZE + FEE)), ]) created_at = models.DateTimeField() expires_at = models.DateTimeField() cltv_expiry = models.PositiveSmallIntegerField(null=True, default=None, blank=True) expiry_height = models.PositiveBigIntegerField(null=True, default=None, blank=True) # routing routing_attempts = models.PositiveSmallIntegerField(null=False, default=0) last_routing_time = models.DateTimeField(null=True, default=None, blank=True) # involved parties sender = models.ForeignKey(User, related_name="sender", on_delete=models.CASCADE, null=True, default=None) receiver = models.ForeignKey(User, related_name="receiver", on_delete=models.CASCADE, null=True, default=None) def __str__(self): return f"LN-{str(self.payment_hash)[:8]}: {self.Concepts(self.concept).label} - {self.Status(self.status).label}" class Meta: verbose_name = "Lightning payment" verbose_name_plural = "Lightning payments" @property def hash(self): # Payment hash is the primary key of LNpayments # However it is too long for the admin panel. # We created a truncated property for display 'hash' return truncatechars(self.payment_hash, 10) class Order(models.Model): class Types(models.IntegerChoices): BUY = 0, "BUY" SELL = 1, "SELL" class Status(models.IntegerChoices): WFB = 0, "Waiting for maker bond" PUB = 1, "Public" DEL = 2, "Deleted" TAK = 3, "Waiting for taker bond" UCA = 4, "Cancelled" EXP = 5, "Expired" WF2 = 6, "Waiting for trade collateral and buyer invoice" WFE = 7, "Waiting only for seller trade collateral" WFI = 8, "Waiting only for buyer invoice" CHA = 9, "Sending fiat - In chatroom" FSE = 10, "Fiat sent - In chatroom" DIS = 11, "In dispute" CCA = 12, "Collaboratively cancelled" PAY = 13, "Sending satoshis to buyer" SUC = 14, "Sucessful trade" FAI = 15, "Failed lightning network routing" WFR = 16, "Wait for dispute resolution" MLD = 17, "Maker lost dispute" TLD = 18, "Taker lost dispute" # order info status = models.PositiveSmallIntegerField(choices=Status.choices, null=False, default=Status.WFB) created_at = models.DateTimeField(auto_now_add=True) expires_at = models.DateTimeField() # order details type = models.PositiveSmallIntegerField(choices=Types.choices, null=False) currency = models.ForeignKey(Currency, null=True, on_delete=models.SET_NULL) amount = models.DecimalField(max_digits=16, decimal_places=8, validators=[MinValueValidator(0.00000001)]) payment_method = models.CharField(max_length=35, null=False, default="not specified", blank=True) # order pricing method. A explicit amount of sats, or a relative premium above/below market. is_explicit = models.BooleanField(default=False, null=False) # marked to market premium = models.DecimalField( max_digits=5, decimal_places=2, default=0, null=True, validators=[MinValueValidator(-100), MaxValueValidator(999)], blank=True, ) # explicit satoshis = models.PositiveBigIntegerField( null=True, validators=[ MinValueValidator(MIN_TRADE), MaxValueValidator(MAX_TRADE) ], blank=True, ) # how many sats at creation and at last check (relevant for marked to market) t0_satoshis = models.PositiveBigIntegerField( null=True, validators=[ MinValueValidator(MIN_TRADE), MaxValueValidator(MAX_TRADE) ], blank=True, ) # sats at creation last_satoshis = models.PositiveBigIntegerField( null=True, validators=[MinValueValidator(0), MaxValueValidator(MAX_TRADE * 2)], blank=True, ) # sats last time checked. Weird if 2* trade max... # order participants maker = models.ForeignKey( User, related_name="maker", on_delete=models.SET_NULL, null=True, default=None) # unique = True, a maker can only make one order taker = models.ForeignKey( User, related_name="taker", on_delete=models.SET_NULL, null=True, default=None, blank=True, ) # unique = True, a taker can only take one order maker_last_seen = models.DateTimeField(null=True, default=None, blank=True) taker_last_seen = models.DateTimeField(null=True, default=None, blank=True) # When collaborative cancel is needed and one partner has cancelled. maker_asked_cancel = models.BooleanField(default=False, null=False) taker_asked_cancel = models.BooleanField(default=False, null=False) is_fiat_sent = models.BooleanField(default=False, null=False) # in dispute is_disputed = models.BooleanField(default=False, null=False) maker_statement = models.TextField(max_length=5000, null=True, default=None, blank=True) taker_statement = models.TextField(max_length=5000, null=True, default=None, blank=True) # LNpayments # Order collateral maker_bond = models.OneToOneField( LNPayment, related_name="order_made", on_delete=models.SET_NULL, null=True, default=None, blank=True, ) taker_bond = models.OneToOneField( LNPayment, related_name="order_taken", on_delete=models.SET_NULL, null=True, default=None, blank=True, ) trade_escrow = models.OneToOneField( LNPayment, related_name="order_escrow", on_delete=models.SET_NULL, null=True, default=None, blank=True, ) # buyer payment LN invoice payout = models.OneToOneField( LNPayment, related_name="order_paid", on_delete=models.SET_NULL, null=True, default=None, blank=True, ) # ratings maker_rated = models.BooleanField(default=False, null=False) taker_rated = models.BooleanField(default=False, null=False) maker_platform_rated = models.BooleanField(default=False, null=False) taker_platform_rated = models.BooleanField(default=False, null=False) t_to_expire = { 0: int(config("EXP_MAKER_BOND_INVOICE")), # 'Waiting for maker bond' 1: 60 * 60 * int(config("PUBLIC_ORDER_DURATION")), # 'Public' 2: 0, # 'Deleted' 3: int(config("EXP_TAKER_BOND_INVOICE")), # 'Waiting for taker bond' 4: 0, # 'Cancelled' 5: 0, # 'Expired' 6: 60 * int(config("INVOICE_AND_ESCROW_DURATION") ), # 'Waiting for trade collateral and buyer invoice' 7: 60 * int(config("INVOICE_AND_ESCROW_DURATION") ), # 'Waiting only for seller trade collateral' 8: 60 * int(config("INVOICE_AND_ESCROW_DURATION") ), # 'Waiting only for buyer invoice' 9: 60 * 60 * int(config("FIAT_EXCHANGE_DURATION")), # 'Sending fiat - In chatroom' 10: 60 * 60 * int(config("FIAT_EXCHANGE_DURATION")), # 'Fiat sent - In chatroom' 11: 1 * 24 * 60 * 60, # 'In dispute' 12: 0, # 'Collaboratively cancelled' 13: 24 * 60 * 60, # 'Sending satoshis to buyer' 14: 24 * 60 * 60, # 'Sucessful trade' 15: 24 * 60 * 60, # 'Failed lightning network routing' 16: 10 * 24 * 60 * 60, # 'Wait for dispute resolution' 17: 24 * 60 * 60, # 'Maker lost dispute' 18: 24 * 60 * 60, # 'Taker lost dispute' } def __str__(self): return f"Order {self.id}: {self.Types(self.type).label} BTC for {float(self.amount)} {self.currency}" @receiver(pre_delete, sender=Order) def delete_lnpayment_at_order_deletion(sender, instance, **kwargs): to_delete = ( instance.maker_bond, instance.payout, instance.taker_bond, instance.trade_escrow, ) for lnpayment in to_delete: try: lnpayment.delete() except: pass class Profile(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) # Total trades total_contracts = models.PositiveIntegerField(null=False, default=0) # Ratings stored as a comma separated integer list total_ratings = models.PositiveIntegerField(null=False, default=0) latest_ratings = models.CharField( max_length=999, null=True, default=None, validators=[validate_comma_separated_integer_list], blank=True, ) # Will only store latest rating avg_rating = models.DecimalField( max_digits=4, decimal_places=1, default=None, null=True, validators=[MinValueValidator(0), MaxValueValidator(100)], blank=True, ) # Used to deep link telegram chat in case telegram notifications are enabled telegram_token = models.CharField( max_length=20, null=True, blank=True ) telegram_chat_id = models.BigIntegerField( null=True, default=None, blank=True ) telegram_enabled = models.BooleanField( default=False, null=False ) telegram_lang_code = models.CharField( max_length=4, null=True, blank=True ) telegram_welcomed = models.BooleanField( default=False, null=False ) # Referral program is_referred = models.BooleanField( default=False, null=False ) referral_code = models.CharField( max_length=15, null=True, blank=True ) # Recent rewards from referred trades that will be "earned" at a later point to difficult spionage. pending_rewards = models.PositiveIntegerField(null=False, default=0) # Claimable rewards earned_rewards = models.PositiveIntegerField(null=False, default=0) # Total claimed rewards claimed_rewarded = models.PositiveIntegerField(null=False, default=0) # Disputes num_disputes = models.PositiveIntegerField(null=False, default=0) lost_disputes = models.PositiveIntegerField(null=False, default=0) num_disputes_started = models.PositiveIntegerField(null=False, default=0) orders_disputes_started = models.CharField( max_length=999, null=True, default=None, validators=[validate_comma_separated_integer_list], blank=True, ) # Will only store ID of orders # RoboHash avatar = models.ImageField( default=("static/assets/avatars/" + "unknown_avatar.png"), verbose_name="Avatar", blank=True, ) # Penalty expiration (only used then taking/cancelling repeatedly orders in the book before comitting bond) penalty_expiration = models.DateTimeField(null=True, default=None, blank=True) # Platform rate platform_rating = models.PositiveIntegerField(null=True, default=None, blank=True) @receiver(post_save, sender=User) def create_user_profile(sender, instance, created, **kwargs): if created: Profile.objects.create(user=instance) @receiver(post_save, sender=User) def save_user_profile(sender, instance, **kwargs): instance.profile.save() @receiver(pre_delete, sender=User) def del_avatar_from_disk(sender, instance, **kwargs): try: avatar_file = Path(settings.AVATAR_ROOT + instance.profile.avatar.url.split("/")[-1]) avatar_file.unlink() except: pass def __str__(self): return self.user.username # to display avatars in admin panel def get_avatar(self): if not self.avatar: return settings.STATIC_ROOT + "unknown_avatar.png" return self.avatar.url # method to create a fake table field in read only mode def avatar_tag(self): return mark_safe('' % self.get_avatar()) class MarketTick(models.Model): """ Records tick by tick Non-KYC Bitcoin price. Data to be aggregated and offered via public API. It is checked against current CEX price for useful insight on the historical premium of Non-KYC BTC Price is set when taker bond is locked. Both maker and taker are commited with bonds (contract is finished and cancellation has a cost) """ id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False) price = models.DecimalField( max_digits=16, decimal_places=2, default=None, null=True, validators=[MinValueValidator(0)], ) volume = models.DecimalField( max_digits=8, decimal_places=8, default=None, null=True, validators=[MinValueValidator(0)], ) premium = models.DecimalField( max_digits=5, decimal_places=2, default=None, null=True, validators=[MinValueValidator(-100), MaxValueValidator(999)], blank=True, ) currency = models.ForeignKey(Currency, null=True, on_delete=models.SET_NULL) timestamp = models.DateTimeField(auto_now_add=True) # Relevant to keep record of the historical fee, so the insight on the premium can be better analyzed fee = models.DecimalField( max_digits=4, decimal_places=4, default=FEE, validators=[MinValueValidator(0), MaxValueValidator(1)], ) def log_a_tick(order): """ Creates a new tick """ if not order.taker_bond: return None elif order.taker_bond.status == LNPayment.Status.LOCKED: volume = order.last_satoshis / 100000000 price = float(order.amount) / volume # Amount Fiat / Amount BTC market_exchange_rate = float(order.currency.exchange_rate) premium = 100 * (price / market_exchange_rate - 1) tick = MarketTick.objects.create(price=price, volume=volume, premium=premium, currency=order.currency) tick.save() def __str__(self): return f"Tick: {str(self.id)[:8]}" class Meta: verbose_name = "Market tick" verbose_name_plural = "Market ticks"