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96 lines
2.7 KiB
Python
96 lines
2.7 KiB
Python
import uuid
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from decimal import Decimal
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from decouple import config
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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.utils import timezone
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FEE = float(config("FEE"))
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class MarketTick(models.Model):
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"""
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Records tick by tick Non-KYC Bitcoin price.
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Data to be aggregated and offered via public API.
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It is checked against current CEX price for useful
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insight on the historical premium of Non-KYC BTC
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Price is set when taker bond is locked. Both
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maker and taker are committed with bonds (contract
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is finished and cancellation has a cost)
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"""
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id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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price = models.DecimalField(
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max_digits=16,
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decimal_places=2,
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default=None,
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null=True,
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validators=[MinValueValidator(Decimal(0))],
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)
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volume = models.DecimalField(
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max_digits=8,
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decimal_places=8,
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default=None,
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null=True,
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validators=[MinValueValidator(Decimal(0))],
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)
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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=None,
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null=True,
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validators=[
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MinValueValidator(Decimal(-100)),
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MaxValueValidator(Decimal(999))
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],
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blank=True,
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)
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currency = models.ForeignKey("api.Currency", null=True, on_delete=models.SET_NULL)
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timestamp = models.DateTimeField(default=timezone.now)
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# Relevant to keep record of the historical fee, so the insight on the premium can be better analyzed
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fee = models.DecimalField(
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max_digits=4,
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decimal_places=4,
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default=0,
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validators=[
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MinValueValidator(Decimal(0)),
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MaxValueValidator(Decimal(1))
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],
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)
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def log_a_tick(order):
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"""
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Creates a new tick
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"""
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from api.models import LNPayment
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if not order.taker_bond:
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return None
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elif order.taker_bond.status == LNPayment.Status.LOCKED:
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volume = order.last_satoshis / 100_000_000
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price = float(order.amount) / volume # Amount Fiat / Amount BTC
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market_exchange_rate = float(order.currency.exchange_rate)
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premium = 100 * (price / market_exchange_rate - 1)
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market_tick = MarketTick.objects.create(
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price=price,
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volume=volume,
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premium=premium,
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currency=order.currency,
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fee=config("FEE", cast=float, default=0),
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)
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return market_tick
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def __str__(self):
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return f"Tick: {str(self.id)[:8]}"
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class Meta:
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verbose_name = "Market tick"
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verbose_name_plural = "Market ticks"
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