mirror of
https://github.com/RoboSats/robosats.git
synced 2024-12-15 11:56:23 +00:00
284 lines
10 KiB
Python
284 lines
10 KiB
Python
import uuid
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from decouple import config
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from django.contrib.auth.models import User
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from django.core.validators import MaxValueValidator, MinValueValidator
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from django.db import models
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from django.db.models.signals import pre_delete
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from django.dispatch import receiver
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from django.utils import timezone
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MIN_TRADE = config("MIN_TRADE", cast=int, default=20_000)
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MAX_TRADE = config("MAX_TRADE", cast=int, default=1_000_000)
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FIAT_EXCHANGE_DURATION = config("FIAT_EXCHANGE_DURATION", cast=int, default=24)
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class Order(models.Model):
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class Types(models.IntegerChoices):
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BUY = 0, "BUY"
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SELL = 1, "SELL"
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class Status(models.IntegerChoices):
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WFB = 0, "Waiting for maker bond"
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PUB = 1, "Public"
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PAU = 2, "Paused"
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TAK = 3, "Waiting for taker bond"
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UCA = 4, "Cancelled"
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EXP = 5, "Expired"
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WF2 = 6, "Waiting for trade collateral and buyer invoice"
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WFE = 7, "Waiting only for seller trade collateral"
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WFI = 8, "Waiting only for buyer invoice"
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CHA = 9, "Sending fiat - In chatroom"
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FSE = 10, "Fiat sent - In chatroom"
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DIS = 11, "In dispute"
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CCA = 12, "Collaboratively cancelled"
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PAY = 13, "Sending satoshis to buyer"
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SUC = 14, "Sucessful trade"
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FAI = 15, "Failed lightning network routing"
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WFR = 16, "Wait for dispute resolution"
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MLD = 17, "Maker lost dispute"
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TLD = 18, "Taker lost dispute"
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class ExpiryReasons(models.IntegerChoices):
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NTAKEN = 0, "Expired not taken"
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NMBOND = 1, "Maker bond not locked"
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NESCRO = 2, "Escrow not locked"
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NINVOI = 3, "Invoice not submitted"
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NESINV = 4, "Neither escrow locked or invoice submitted"
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# order info
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reference = models.UUIDField(default=uuid.uuid4, editable=False)
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status = models.PositiveSmallIntegerField(
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choices=Status.choices, null=False, default=Status.WFB
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)
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created_at = models.DateTimeField(default=timezone.now)
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expires_at = models.DateTimeField()
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expiry_reason = models.PositiveSmallIntegerField(
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choices=ExpiryReasons.choices, null=True, blank=True, default=None
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)
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# order details
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type = models.PositiveSmallIntegerField(choices=Types.choices, null=False)
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currency = models.ForeignKey("api.Currency", null=True, on_delete=models.SET_NULL)
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amount = models.DecimalField(max_digits=18, decimal_places=8, null=True, blank=True)
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has_range = models.BooleanField(default=False, null=False, blank=False)
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min_amount = models.DecimalField(
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max_digits=18, decimal_places=8, null=True, blank=True
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)
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max_amount = models.DecimalField(
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max_digits=18, decimal_places=8, null=True, blank=True
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)
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payment_method = models.CharField(
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max_length=70, null=False, default="not specified", blank=True
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)
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# order pricing method. A explicit amount of sats, or a relative premium above/below market.
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is_explicit = models.BooleanField(default=False, null=False)
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# marked to market
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premium = models.DecimalField(
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max_digits=5,
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decimal_places=2,
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default=0,
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null=True,
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validators=[MinValueValidator(-100), MaxValueValidator(999)],
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blank=True,
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)
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# explicit
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satoshis = models.PositiveBigIntegerField(
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null=True,
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validators=[MinValueValidator(MIN_TRADE), MaxValueValidator(MAX_TRADE)],
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blank=True,
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)
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# optionally makers can choose the public order duration length (seconds)
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public_duration = models.PositiveBigIntegerField(
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default=60 * 60 * config("DEFAULT_PUBLIC_ORDER_DURATION", cast=int, default=24)
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- 1,
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null=False,
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validators=[
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MinValueValidator(
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60 * 60 * config("MIN_PUBLIC_ORDER_DURATION", cast=float, default=0.166)
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), # Min is 10 minutes
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MaxValueValidator(
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60 * 60 * config("MAX_PUBLIC_ORDER_DURATION", cast=float, default=24)
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), # Max is 24 Hours
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],
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blank=False,
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)
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# optionally makers can choose the escrow lock / invoice submission step length (seconds)
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escrow_duration = models.PositiveBigIntegerField(
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default=60 * int(config("INVOICE_AND_ESCROW_DURATION")) - 1,
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null=False,
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validators=[
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MinValueValidator(60 * 30), # Min is 30 minutes
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MaxValueValidator(60 * 60 * 8), # Max is 8 Hours
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],
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blank=False,
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)
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# optionally makers can choose the fidelity bond size of the maker and taker (%)
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bond_size = models.DecimalField(
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max_digits=4,
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decimal_places=2,
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default=config("DEFAULT_BOND_SIZE", cast=float, default=3),
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null=False,
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validators=[
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MinValueValidator(config("MIN_BOND_SIZE", cast=float, default=1)), # 1 %
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MaxValueValidator(config("MAX_BOND_SIZE", cast=float, default=1)), # 15 %
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],
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blank=False,
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)
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# how many sats at creation and at last check (relevant for marked to market)
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t0_satoshis = models.PositiveBigIntegerField(
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null=True,
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validators=[MinValueValidator(MIN_TRADE), MaxValueValidator(MAX_TRADE)],
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blank=True,
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) # sats at creation
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last_satoshis = models.PositiveBigIntegerField(
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null=True,
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validators=[MinValueValidator(0), MaxValueValidator(MAX_TRADE * 2)],
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blank=True,
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) # sats last time checked. Weird if 2* trade max...
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# timestamp of last_satoshis
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last_satoshis_time = models.DateTimeField(null=True, default=None, blank=True)
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# time the fiat exchange is confirmed and Sats released to buyer
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contract_finalization_time = models.DateTimeField(
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null=True, default=None, blank=True
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)
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# order participants
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maker = models.ForeignKey(
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User, related_name="maker", on_delete=models.SET_NULL, null=True, default=None
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) # unique = True, a maker can only make one order
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taker = models.ForeignKey(
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User,
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related_name="taker",
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on_delete=models.SET_NULL,
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null=True,
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default=None,
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blank=True,
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) # unique = True, a taker can only take one order
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# When collaborative cancel is needed and one partner has cancelled.
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maker_asked_cancel = models.BooleanField(default=False, null=False)
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taker_asked_cancel = models.BooleanField(default=False, null=False)
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is_fiat_sent = models.BooleanField(default=False, null=False)
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reverted_fiat_sent = models.BooleanField(default=False, null=False)
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# in dispute
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is_disputed = models.BooleanField(default=False, null=False)
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maker_statement = models.TextField(
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max_length=50_000, null=True, default=None, blank=True
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)
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taker_statement = models.TextField(
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max_length=50_000, null=True, default=None, blank=True
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)
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# LNpayments
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# Order collateral
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maker_bond = models.OneToOneField(
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"api.LNPayment",
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related_name="order_made",
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on_delete=models.SET_NULL,
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null=True,
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default=None,
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blank=True,
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)
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taker_bond = models.OneToOneField(
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"api.LNPayment",
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related_name="order_taken",
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on_delete=models.SET_NULL,
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null=True,
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default=None,
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blank=True,
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)
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trade_escrow = models.OneToOneField(
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"api.LNPayment",
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related_name="order_escrow",
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on_delete=models.SET_NULL,
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null=True,
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default=None,
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blank=True,
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)
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# is buyer payout a LN invoice (false) or on chain address (true)
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is_swap = models.BooleanField(default=False, null=False)
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# buyer payment LN invoice
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payout = models.OneToOneField(
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"api.LNPayment",
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related_name="order_paid_LN",
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on_delete=models.SET_NULL,
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null=True,
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default=None,
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blank=True,
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)
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# buyer payment address
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payout_tx = models.OneToOneField(
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"api.OnchainPayment",
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related_name="order_paid_TX",
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on_delete=models.SET_NULL,
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null=True,
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default=None,
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blank=True,
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)
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# ratings
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maker_rated = models.BooleanField(default=False, null=False)
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taker_rated = models.BooleanField(default=False, null=False)
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maker_platform_rated = models.BooleanField(default=False, null=False)
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taker_platform_rated = models.BooleanField(default=False, null=False)
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def __str__(self):
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if self.has_range and self.amount is None:
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amt = str(float(self.min_amount)) + "-" + str(float(self.max_amount))
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else:
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amt = float(self.amount)
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return f"Order {self.id}: {self.Types(self.type).label} BTC for {amt} {self.currency}"
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def t_to_expire(self, status):
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t_to_expire = {
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0: config(
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"EXP_MAKER_BOND_INVOICE", cast=int, default=300
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), # 'Waiting for maker bond'
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1: self.public_duration, # 'Public'
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2: 0, # 'Deleted'
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3: config(
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"EXP_TAKER_BOND_INVOICE", cast=int, default=150
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), # 'Waiting for taker bond'
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4: 0, # 'Cancelled'
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5: 0, # 'Expired'
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6: int(
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self.escrow_duration
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), # 'Waiting for trade collateral and buyer invoice'
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7: int(self.escrow_duration), # 'Waiting only for seller trade collateral'
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8: int(self.escrow_duration), # 'Waiting only for buyer invoice'
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9: 60 * 60 * FIAT_EXCHANGE_DURATION, # 'Sending fiat - In chatroom'
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10: 60 * 60 * FIAT_EXCHANGE_DURATION, # 'Fiat sent - In chatroom'
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11: 1 * 24 * 60 * 60, # 'In dispute'
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12: 0, # 'Collaboratively cancelled'
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13: 100 * 24 * 60 * 60, # 'Sending satoshis to buyer'
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14: 100 * 24 * 60 * 60, # 'Successful trade'
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15: 100 * 24 * 60 * 60, # 'Failed lightning network routing'
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16: 100 * 24 * 60 * 60, # 'Wait for dispute resolution'
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17: 100 * 24 * 60 * 60, # 'Maker lost dispute'
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18: 100 * 24 * 60 * 60, # 'Taker lost dispute'
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}
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return t_to_expire[status]
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@receiver(pre_delete, sender=Order)
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def delete_lnpayment_at_order_deletion(sender, instance, **kwargs):
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to_delete = (
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instance.maker_bond,
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instance.payout,
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instance.taker_bond,
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instance.trade_escrow,
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)
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for lnpayment in to_delete:
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try:
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lnpayment.delete()
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except Exception:
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pass
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