mirror of
https://github.com/RoboSats/robosats.git
synced 2024-12-13 19:06:26 +00:00
548 lines
24 KiB
Python
548 lines
24 KiB
Python
from datetime import time, timedelta
|
|
from django.utils import timezone
|
|
from .lightning.node import LNNode
|
|
|
|
from .models import Order, LNPayment, MarketTick, User
|
|
from decouple import config
|
|
from .utils import get_exchange_rate
|
|
|
|
import math
|
|
|
|
FEE = float(config('FEE'))
|
|
BOND_SIZE = float(config('BOND_SIZE'))
|
|
MARKET_PRICE_API = config('MARKET_PRICE_API')
|
|
ESCROW_USERNAME = config('ESCROW_USERNAME')
|
|
PENALTY_TIMEOUT = int(config('PENALTY_TIMEOUT'))
|
|
|
|
MIN_TRADE = int(config('MIN_TRADE'))
|
|
MAX_TRADE = int(config('MAX_TRADE'))
|
|
|
|
EXP_MAKER_BOND_INVOICE = int(config('EXP_MAKER_BOND_INVOICE'))
|
|
EXP_TAKER_BOND_INVOICE = int(config('EXP_TAKER_BOND_INVOICE'))
|
|
|
|
BOND_EXPIRY = int(config('BOND_EXPIRY'))
|
|
ESCROW_EXPIRY = int(config('ESCROW_EXPIRY'))
|
|
|
|
PUBLIC_ORDER_DURATION = int(config('PUBLIC_ORDER_DURATION'))
|
|
INVOICE_AND_ESCROW_DURATION = int(config('INVOICE_AND_ESCROW_DURATION'))
|
|
FIAT_EXCHANGE_DURATION = int(config('FIAT_EXCHANGE_DURATION'))
|
|
|
|
class Logics():
|
|
|
|
def validate_already_maker_or_taker(user):
|
|
'''Checks if the user is already partipant of an order'''
|
|
queryset = Order.objects.filter(maker=user)
|
|
if queryset.exists():
|
|
return False, {'bad_request':'You are already maker of an order'}
|
|
queryset = Order.objects.filter(taker=user)
|
|
if queryset.exists():
|
|
return False, {'bad_request':'You are already taker of an order'}
|
|
return True, None
|
|
|
|
def validate_order_size(order):
|
|
'''Checks if order is withing limits at t0'''
|
|
if order.t0_satoshis > MAX_TRADE:
|
|
return False, {'bad_request': 'Your order is too big. It is worth '+'{:,}'.format(order.t0_satoshis)+' Sats now. But limit is '+'{:,}'.format(MAX_TRADE)+ ' Sats'}
|
|
if order.t0_satoshis < MIN_TRADE:
|
|
return False, {'bad_request': 'Your order is too small. It is worth '+'{:,}'.format(order.t0_satoshis)+' Sats now. But limit is '+'{:,}'.format(MIN_TRADE)+ ' Sats'}
|
|
return True, None
|
|
|
|
@classmethod
|
|
def take(cls, order, user):
|
|
is_penalized, time_out = cls.is_penalized(user)
|
|
if is_penalized:
|
|
return False, {'bad_request',f'You need to wait {time_out} seconds to take an order'}
|
|
else:
|
|
order.taker = user
|
|
order.status = Order.Status.TAK
|
|
order.expires_at = timezone.now() + timedelta(minutes=EXP_TAKER_BOND_INVOICE)
|
|
order.save()
|
|
return True, None
|
|
|
|
def is_buyer(order, user):
|
|
is_maker = order.maker == user
|
|
is_taker = order.taker == user
|
|
return (is_maker and order.type == Order.Types.BUY) or (is_taker and order.type == Order.Types.SELL)
|
|
|
|
def is_seller(order, user):
|
|
is_maker = order.maker == user
|
|
is_taker = order.taker == user
|
|
return (is_maker and order.type == Order.Types.SELL) or (is_taker and order.type == Order.Types.BUY)
|
|
|
|
def satoshis_now(order):
|
|
''' checks trade amount in sats '''
|
|
if order.is_explicit:
|
|
satoshis_now = order.satoshis
|
|
else:
|
|
exchange_rate = get_exchange_rate(Order.currency_dict[str(order.currency)])
|
|
premium_rate = exchange_rate * (1+float(order.premium)/100)
|
|
satoshis_now = (float(order.amount) / premium_rate) * 100*1000*1000
|
|
|
|
return int(satoshis_now)
|
|
|
|
def price_and_premium_now(order):
|
|
''' computes order premium live '''
|
|
exchange_rate = get_exchange_rate(Order.currency_dict[str(order.currency)])
|
|
if not order.is_explicit:
|
|
premium = order.premium
|
|
price = exchange_rate * (1+float(premium)/100)
|
|
else:
|
|
exchange_rate = get_exchange_rate(Order.currency_dict[str(order.currency)])
|
|
order_rate = float(order.amount) / (float(order.satoshis) / 100000000)
|
|
premium = order_rate / exchange_rate - 1
|
|
premium = int(premium*100) # 2 decimals left
|
|
price = order_rate
|
|
|
|
significant_digits = 6
|
|
price = round(price, significant_digits - int(math.floor(math.log10(abs(price)))) - 1)
|
|
|
|
return price, premium
|
|
|
|
def order_expires(order):
|
|
''' General case when time runs out. Only
|
|
used when the maker does not lock a publishing bond'''
|
|
order.status = Order.Status.EXP
|
|
order.maker = None
|
|
order.taker = None
|
|
order.save()
|
|
|
|
def kick_taker(order):
|
|
''' The taker did not lock the taker_bond. Now he has to go'''
|
|
# Add a time out to the taker
|
|
profile = order.taker.profile
|
|
profile.penalty_expiration = timezone.now() + timedelta(seconds=PENALTY_TIMEOUT)
|
|
profile.save()
|
|
|
|
# Delete the taker_bond payment request, and make order public again
|
|
if LNNode.cancel_return_hold_invoice(order.taker_bond.payment_hash):
|
|
order.status = Order.Status.PUB
|
|
order.taker = None
|
|
order.taker_bond = None
|
|
order.expires_at = timezone.now() + timedelta(hours=PUBLIC_ORDER_DURATION) ## TO FIX. Restore the remaining order durantion, not all of it!
|
|
order.save()
|
|
return True
|
|
|
|
@classmethod
|
|
def buyer_invoice_amount(cls, order, user):
|
|
''' Computes buyer invoice amount. Uses order.last_satoshis,
|
|
that is the final trade amount set at Taker Bond time'''
|
|
|
|
if cls.is_buyer(order, user):
|
|
invoice_amount = int(order.last_satoshis * (1-FEE)) # Trading FEE is charged here.
|
|
|
|
return True, {'invoice_amount': invoice_amount}
|
|
|
|
@classmethod
|
|
def update_invoice(cls, order, user, invoice):
|
|
|
|
# only the buyer can post a buyer invoice
|
|
if not cls.is_buyer(order, user):
|
|
return False, {'bad_request':'Only the buyer of this order can provide a buyer invoice.'}
|
|
if not order.taker_bond:
|
|
return False, {'bad_request':'Wait for your order to be taken.'}
|
|
if not (order.taker_bond.status == order.maker_bond.status == LNPayment.Status.LOCKED):
|
|
return False, {'bad_request':'You cannot a invoice while bonds are not posted.'}
|
|
|
|
num_satoshis = cls.buyer_invoice_amount(order, user)[1]['invoice_amount']
|
|
buyer_invoice = LNNode.validate_ln_invoice(invoice, num_satoshis)
|
|
|
|
if not buyer_invoice['valid']:
|
|
return False, buyer_invoice['context']
|
|
|
|
order.buyer_invoice, _ = LNPayment.objects.update_or_create(
|
|
concept = LNPayment.Concepts.PAYBUYER,
|
|
type = LNPayment.Types.NORM,
|
|
sender = User.objects.get(username=ESCROW_USERNAME),
|
|
receiver= user,
|
|
# if there is a LNPayment matching these above, it updates that one with defaults below.
|
|
defaults={
|
|
'invoice' : invoice,
|
|
'status' : LNPayment.Status.VALIDI,
|
|
'num_satoshis' : num_satoshis,
|
|
'description' : buyer_invoice['description'],
|
|
'payment_hash' : buyer_invoice['payment_hash'],
|
|
'created_at' : buyer_invoice['created_at'],
|
|
'expires_at' : buyer_invoice['expires_at']}
|
|
)
|
|
|
|
# If the order status is 'Waiting for invoice'. Move forward to 'chat'
|
|
if order.status == Order.Status.WFI:
|
|
order.status = Order.Status.CHA
|
|
order.expires_at = timezone.now() + timedelta(hours=FIAT_EXCHANGE_DURATION)
|
|
|
|
# If the order status is 'Waiting for both'. Move forward to 'waiting for escrow'
|
|
if order.status == Order.Status.WF2:
|
|
# If the escrow is lock move to Chat.
|
|
if order.trade_escrow.status == LNPayment.Status.LOCKED:
|
|
order.status = Order.Status.CHA
|
|
order.expires_at = timezone.now() + timedelta(hours=FIAT_EXCHANGE_DURATION)
|
|
else:
|
|
order.status = Order.Status.WFE
|
|
|
|
order.save()
|
|
return True, None
|
|
|
|
def add_profile_rating(profile, rating):
|
|
''' adds a new rating to a user profile'''
|
|
|
|
profile.total_ratings = profile.total_ratings + 1
|
|
latest_ratings = profile.latest_ratings
|
|
if len(latest_ratings) <= 1:
|
|
profile.latest_ratings = [rating]
|
|
profile.avg_rating = rating
|
|
|
|
else:
|
|
latest_ratings = list(latest_ratings).append(rating)
|
|
profile.latest_ratings = latest_ratings
|
|
profile.avg_rating = sum(latest_ratings) / len(latest_ratings)
|
|
|
|
profile.save()
|
|
|
|
def is_penalized(user):
|
|
''' Checks if a user that is not participant of orders
|
|
has a limit on taking or making a order'''
|
|
|
|
if user.profile.penalty_expiration:
|
|
if user.profile.penalty_expiration > timezone.now():
|
|
time_out = (user.profile.penalty_expiration - timezone.now()).seconds
|
|
return True, time_out
|
|
|
|
return False, None
|
|
|
|
|
|
@classmethod
|
|
def cancel_order(cls, order, user, state=None):
|
|
|
|
# 1) When maker cancels before bond
|
|
'''The order never shows up on the book and order
|
|
status becomes "cancelled". That's it.'''
|
|
if order.status == Order.Status.WFB and order.maker == user:
|
|
order.maker = None
|
|
order.status = Order.Status.UCA
|
|
order.save()
|
|
return True, None
|
|
|
|
# 2) When maker cancels after bond
|
|
'''The order dissapears from book and goes to cancelled. Maker is charged the bond to prevent DDOS
|
|
on the LN node and order book. TODO Only charge a small part of the bond (requires maker submitting an invoice)'''
|
|
elif order.status == Order.Status.PUB and order.maker == user:
|
|
#Settle the maker bond (Maker loses the bond for cancelling public order)
|
|
if cls.settle_maker_bond(order):
|
|
order.maker = None
|
|
order.status = Order.Status.UCA
|
|
order.save()
|
|
return True, None
|
|
|
|
# 3) When taker cancels before bond
|
|
''' The order goes back to the book as public.
|
|
LNPayment "order.taker_bond" is deleted() '''
|
|
elif order.status == Order.Status.TAK and order.taker == user:
|
|
# adds a timeout penalty
|
|
cls.kick_taker(order)
|
|
return True, None
|
|
|
|
# 4) When taker or maker cancel after bond (before escrow)
|
|
'''The order goes into cancelled status if maker cancels.
|
|
The order goes into the public book if taker cancels.
|
|
In both cases there is a small fee.'''
|
|
|
|
# 4.a) When maker cancel after bond (before escrow)
|
|
'''The order into cancelled status if maker cancels.'''
|
|
elif order.status > Order.Status.PUB and order.status < Order.Status.CHA and order.maker == user:
|
|
#Settle the maker bond (Maker loses the bond for canceling an ongoing trade)
|
|
valid = cls.settle_maker_bond(order)
|
|
if valid:
|
|
order.maker = None
|
|
order.status = Order.Status.UCA
|
|
order.save()
|
|
return True, None
|
|
|
|
# 4.b) When taker cancel after bond (before escrow)
|
|
'''The order into cancelled status if maker cancels.'''
|
|
elif order.status > Order.Status.TAK and order.status < Order.Status.CHA and order.taker == user:
|
|
# Settle the maker bond (Maker loses the bond for canceling an ongoing trade)
|
|
valid = cls.settle_taker_bond(order)
|
|
if valid:
|
|
order.taker = None
|
|
order.status = Order.Status.PUB
|
|
# order.taker_bond = None # TODO fix this, it overrides the information about the settled taker bond. Might make admin tasks hard.
|
|
order.save()
|
|
return True, None
|
|
|
|
# 5) When trade collateral has been posted (after escrow)
|
|
'''Always goes to cancelled status. Collaboration is needed.
|
|
When a user asks for cancel, 'order.is_pending_cancel' goes True.
|
|
When the second user asks for cancel. Order is totally cancelled.
|
|
Has a small cost for both parties to prevent node DDOS.'''
|
|
|
|
else:
|
|
return False, {'bad_request':'You cannot cancel this order'}
|
|
|
|
@classmethod
|
|
def is_maker_bond_locked(cls, order):
|
|
if LNNode.validate_hold_invoice_locked(order.maker_bond.payment_hash):
|
|
order.maker_bond.status = LNPayment.Status.LOCKED
|
|
order.maker_bond.save()
|
|
order.status = Order.Status.PUB
|
|
# With the bond confirmation the order is extended 'public_order_duration' hours
|
|
order.expires_at = timezone.now() + timedelta(hours=PUBLIC_ORDER_DURATION)
|
|
order.save()
|
|
return True
|
|
return False
|
|
|
|
@classmethod
|
|
def gen_maker_hold_invoice(cls, order, user):
|
|
|
|
# Do not gen and cancel if order is older than expiry time
|
|
if order.expires_at < timezone.now():
|
|
cls.order_expires(order)
|
|
return False, {'bad_request':'Invoice expired. You did not confirm publishing the order in time. Make a new order.'}
|
|
|
|
# Return the previous invoice if there was one and is still unpaid
|
|
if order.maker_bond:
|
|
if cls.is_maker_bond_locked(order):
|
|
return False, None
|
|
elif order.maker_bond.status == LNPayment.Status.INVGEN:
|
|
return True, {'bond_invoice':order.maker_bond.invoice,'bond_satoshis':order.maker_bond.num_satoshis}
|
|
|
|
# If there was no maker_bond object yet, generates one
|
|
order.last_satoshis = cls.satoshis_now(order)
|
|
bond_satoshis = int(order.last_satoshis * BOND_SIZE)
|
|
|
|
description = f"RoboSats - Publishing '{str(order)}' - This is a maker bond, it will freeze in your wallet temporarily and automatically return. It will be charged if you cheat or cancel."
|
|
|
|
# Gen hold Invoice
|
|
hold_payment = LNNode.gen_hold_invoice(bond_satoshis, description, BOND_EXPIRY*3600)
|
|
|
|
order.maker_bond = LNPayment.objects.create(
|
|
concept = LNPayment.Concepts.MAKEBOND,
|
|
type = LNPayment.Types.HOLD,
|
|
sender = user,
|
|
receiver = User.objects.get(username=ESCROW_USERNAME),
|
|
invoice = hold_payment['invoice'],
|
|
preimage = hold_payment['preimage'],
|
|
status = LNPayment.Status.INVGEN,
|
|
num_satoshis = bond_satoshis,
|
|
description = description,
|
|
payment_hash = hold_payment['payment_hash'],
|
|
created_at = hold_payment['created_at'],
|
|
expires_at = hold_payment['expires_at'])
|
|
|
|
order.save()
|
|
return True, {'bond_invoice':hold_payment['invoice'], 'bond_satoshis':bond_satoshis}
|
|
|
|
@classmethod
|
|
def is_taker_bond_locked(cls, order):
|
|
if LNNode.validate_hold_invoice_locked(order.taker_bond.payment_hash):
|
|
# THE TRADE AMOUNT IS FINAL WITH THE CONFIRMATION OF THE TAKER BOND!
|
|
# (This is the last update to "last_satoshis", it becomes the escrow amount next!)
|
|
order.last_satoshis = cls.satoshis_now(order)
|
|
order.taker_bond.status = LNPayment.Status.LOCKED
|
|
order.taker_bond.save()
|
|
|
|
# Log a market tick
|
|
MarketTick.log_a_tick(order)
|
|
|
|
# With the bond confirmation the order is extended 'public_order_duration' hours
|
|
order.expires_at = timezone.now() + timedelta(minutes=INVOICE_AND_ESCROW_DURATION)
|
|
order.status = Order.Status.WF2
|
|
order.save()
|
|
return True
|
|
return False
|
|
|
|
@classmethod
|
|
def gen_taker_hold_invoice(cls, order, user):
|
|
|
|
# Do not gen and kick out the taker if order is older than expiry time
|
|
if order.expires_at < timezone.now():
|
|
cls.kick_taker(order)
|
|
return False, {'bad_request':'Invoice expired. You did not confirm taking the order in time.'}
|
|
|
|
# Do not gen if a taker invoice exist. Do not return if it is already locked. Return the old one if still waiting.
|
|
if order.taker_bond:
|
|
# Check if status is INVGEN and still not expired
|
|
if cls.is_taker_bond_locked(order):
|
|
return False, None
|
|
elif order.taker_bond.status == LNPayment.Status.INVGEN:
|
|
return True, {'bond_invoice':order.taker_bond.invoice,'bond_satoshis':order.taker_bond.num_satoshis}
|
|
|
|
# If there was no taker_bond object yet, generates one
|
|
order.last_satoshis = cls.satoshis_now(order)
|
|
bond_satoshis = int(order.last_satoshis * BOND_SIZE)
|
|
pos_text = 'Buying' if cls.is_buyer(order, user) else 'Selling'
|
|
description = f"RoboSats - Taking 'Order {order.id}' {pos_text} BTC for {order.amount} - This is a taker bond, it will freeze in your wallet temporarily and automatically return. It will be charged if you cheat or cancel."
|
|
|
|
# Gen hold Invoice
|
|
hold_payment = LNNode.gen_hold_invoice(bond_satoshis, description, BOND_EXPIRY*3600)
|
|
|
|
order.taker_bond = LNPayment.objects.create(
|
|
concept = LNPayment.Concepts.TAKEBOND,
|
|
type = LNPayment.Types.HOLD,
|
|
sender = user,
|
|
receiver = User.objects.get(username=ESCROW_USERNAME),
|
|
invoice = hold_payment['invoice'],
|
|
preimage = hold_payment['preimage'],
|
|
status = LNPayment.Status.INVGEN,
|
|
num_satoshis = bond_satoshis,
|
|
description = description,
|
|
payment_hash = hold_payment['payment_hash'],
|
|
created_at = hold_payment['created_at'],
|
|
expires_at = hold_payment['expires_at'])
|
|
|
|
order.expires_at = timezone.now() + timedelta(seconds=EXP_TAKER_BOND_INVOICE)
|
|
order.save()
|
|
return True, {'bond_invoice': hold_payment['invoice'], 'bond_satoshis': bond_satoshis}
|
|
|
|
|
|
@classmethod
|
|
def is_trade_escrow_locked(cls, order):
|
|
if LNNode.validate_hold_invoice_locked(order.trade_escrow.payment_hash):
|
|
order.trade_escrow.status = LNPayment.Status.LOCKED
|
|
order.trade_escrow.save()
|
|
# If status is 'Waiting for both' move to Waiting for invoice
|
|
if order.status == Order.Status.WF2:
|
|
order.status = Order.Status.WFI
|
|
# If status is 'Waiting for invoice' move to Chat
|
|
elif order.status == Order.Status.WFE:
|
|
order.status = Order.Status.CHA
|
|
order.expires_at = timezone.now() + timedelta(hours=FIAT_EXCHANGE_DURATION)
|
|
order.save()
|
|
return True
|
|
return False
|
|
|
|
@classmethod
|
|
def gen_escrow_hold_invoice(cls, order, user):
|
|
|
|
# Do not generate if escrow deposit time has expired
|
|
if order.expires_at < timezone.now():
|
|
cls.cancel_order(order,user)
|
|
return False, {'bad_request':'Invoice expired. You did not send the escrow in time.'}
|
|
|
|
# Do not gen if an escrow invoice exist. Do not return if it is already locked. Return the old one if still waiting.
|
|
if order.trade_escrow:
|
|
# Check if status is INVGEN and still not expired
|
|
if cls.is_trade_escrow_locked(order):
|
|
return False, None
|
|
elif order.trade_escrow.status == LNPayment.Status.INVGEN:
|
|
return True, {'escrow_invoice':order.trade_escrow.invoice, 'escrow_satoshis':order.trade_escrow.num_satoshis}
|
|
|
|
# If there was no taker_bond object yet, generates one
|
|
escrow_satoshis = order.last_satoshis # Amount was fixed when taker bond was locked
|
|
description = f"RoboSats - Escrow amount for '{str(order)}' - The escrow will be released to the buyer once you confirm you received the fiat. It will automatically return if buyer does not confirm the payment."
|
|
|
|
# Gen hold Invoice
|
|
hold_payment = LNNode.gen_hold_invoice(escrow_satoshis, description, ESCROW_EXPIRY*3600)
|
|
|
|
order.trade_escrow = LNPayment.objects.create(
|
|
concept = LNPayment.Concepts.TRESCROW,
|
|
type = LNPayment.Types.HOLD,
|
|
sender = user,
|
|
receiver = User.objects.get(username=ESCROW_USERNAME),
|
|
invoice = hold_payment['invoice'],
|
|
preimage = hold_payment['preimage'],
|
|
status = LNPayment.Status.INVGEN,
|
|
num_satoshis = escrow_satoshis,
|
|
description = description,
|
|
payment_hash = hold_payment['payment_hash'],
|
|
created_at = hold_payment['created_at'],
|
|
expires_at = hold_payment['expires_at'])
|
|
|
|
order.save()
|
|
return True, {'escrow_invoice':hold_payment['invoice'],'escrow_satoshis': escrow_satoshis}
|
|
|
|
def settle_escrow(order):
|
|
''' Settles the trade escrow hold invoice'''
|
|
# TODO ERROR HANDLING
|
|
if LNNode.settle_hold_invoice(order.trade_escrow.preimage):
|
|
order.trade_escrow.status = LNPayment.Status.SETLED
|
|
order.trade_escrow.save()
|
|
return True
|
|
|
|
def settle_maker_bond(order):
|
|
''' Settles the maker bond hold invoice'''
|
|
# TODO ERROR HANDLING
|
|
if LNNode.settle_hold_invoice(order.maker_bond.preimage):
|
|
order.maker_bond.status = LNPayment.Status.SETLED
|
|
order.maker_bond.save()
|
|
return True
|
|
|
|
def settle_taker_bond(order):
|
|
''' Settles the taker bond hold invoice'''
|
|
# TODO ERROR HANDLING
|
|
if LNNode.settle_hold_invoice(order.taker_bond.preimage):
|
|
order.taker_bond.status = LNPayment.Status.SETLED
|
|
order.taker_bond.save()
|
|
return True
|
|
|
|
def return_bond(bond):
|
|
'''returns a bond'''
|
|
if LNNode.cancel_return_hold_invoice(bond.payment_hash):
|
|
bond.status = LNPayment.Status.RETNED
|
|
return True
|
|
|
|
def pay_buyer_invoice(order):
|
|
''' Pay buyer invoice'''
|
|
# TODO ERROR HANDLING
|
|
if LNNode.pay_invoice(order.buyer_invoice.invoice, order.buyer_invoice.num_satoshis):
|
|
return True
|
|
|
|
@classmethod
|
|
def confirm_fiat(cls, order, user):
|
|
''' If Order is in the CHAT states:
|
|
If user is buyer: mark FIAT SENT and settle escrow!
|
|
If User is the seller and FIAT is SENT: Pay buyer invoice!'''
|
|
|
|
if order.status == Order.Status.CHA or order.status == Order.Status.FSE: # TODO Alternatively, if all collateral is locked? test out
|
|
|
|
# If buyer, settle escrow and mark fiat sent
|
|
if cls.is_buyer(order, user):
|
|
if cls.settle_escrow(order): ##### !!! KEY LINE - SETTLES THE TRADE ESCROW !!!
|
|
order.trade_escrow.status = LNPayment.Status.SETLED
|
|
order.status = Order.Status.FSE
|
|
order.is_fiat_sent = True
|
|
|
|
# If seller and fiat sent, pay buyer invoice
|
|
elif cls.is_seller(order, user):
|
|
if not order.is_fiat_sent:
|
|
return False, {'bad_request':'You cannot confirm to have received the fiat before it is confirmed to be sent by the buyer.'}
|
|
|
|
# Make sure the trade escrow is at least as big as the buyer invoice
|
|
if order.trade_escrow.num_satoshis <= order.buyer_invoice.num_satoshis:
|
|
return False, {'bad_request':'Woah, something broke badly. Report in the public channels, or open a Github Issue.'}
|
|
|
|
# Double check the escrow is settled.
|
|
if LNNode.double_check_htlc_is_settled(order.trade_escrow.payment_hash):
|
|
is_payed, context = cls.pay_buyer_invoice(order) ##### !!! KEY LINE - PAYS THE BUYER INVOICE !!!
|
|
if is_payed:
|
|
order.status = Order.Status.SUC
|
|
order.buyer_invoice.status = LNPayment.Status.SUCCED
|
|
order.expires_at = timezone.now() + timedelta(days=1) # One day to rate / see this order.
|
|
order.save()
|
|
|
|
# RETURN THE BONDS
|
|
cls.return_bond(order.taker_bond)
|
|
cls.return_bond(order.maker_bond)
|
|
else:
|
|
# error handling here
|
|
pass
|
|
else:
|
|
return False, {'bad_request':'You cannot confirm the fiat payment at this stage'}
|
|
|
|
order.save()
|
|
return True, None
|
|
|
|
@classmethod
|
|
def rate_counterparty(cls, order, user, rating):
|
|
|
|
# If the trade is finished
|
|
if order.status > Order.Status.PAY:
|
|
# if maker, rates taker
|
|
if order.maker == user:
|
|
cls.add_profile_rating(order.taker.profile, rating)
|
|
# if taker, rates maker
|
|
if order.taker == user:
|
|
cls.add_profile_rating(order.maker.profile, rating)
|
|
else:
|
|
return False, {'bad_request':'You cannot rate your counterparty yet.'}
|
|
|
|
return True, None |