228 lines
8.0 KiB
Python
228 lines
8.0 KiB
Python
# Twisted/Klein imports
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from twisted.logger import Logger
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# Other library imports
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from json import dumps
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from random import choices
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from string import ascii_uppercase
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# Project imports
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from settings import settings
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from db import r
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from util import convert
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class Transactions(object):
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"""
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Handler class for incoming Revolut transactions.
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"""
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def __init__(self):
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"""
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Initialise the Transaction object.
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Set the logger.
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"""
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self.log = Logger("transactions")
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def set_agora(self, agora):
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self.agora = agora
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def set_irc(self, irc):
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self.irc = irc
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def transaction(self, data):
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"""
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Store details of transaction and post notifications to IRC.
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Matches it up with data stored in Redis to attempt to reconcile with an Agora trade.
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:param data: details of transaction
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:type data: dict
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"""
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event = data["event"]
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ts = data["timestamp"]
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inside = data["data"]
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txid = inside["id"]
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txtype = inside["type"]
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state = inside["state"]
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if "reference" in inside:
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reference = inside["reference"]
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else:
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reference = "not_given"
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leg = inside["legs"][0]
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if "counterparty" in leg:
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account_type = leg["counterparty"]["account_type"]
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else:
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account_type = "not_given"
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amount = leg["amount"]
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currency = leg["currency"]
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description = leg["description"]
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to_store = {
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"event": event,
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"ts": ts,
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"txid": txid,
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"txtype": txtype,
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"state": state,
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"reference": reference,
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"account_type": account_type,
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"amount": amount,
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"currency": currency,
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"description": description,
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}
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self.log.info("Transaction processed: {formatted}", formatted=dumps(to_store, indent=2))
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r.hmset(f"tx.{txid}", to_store)
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self.irc.sendmsg(f"AUTO Incoming transaction: {amount}{currency} ({reference}) - {state} - {description}")
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# Try getting the trade by the reference ID given
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stored_trade = self.get_ref(reference)
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if not stored_trade:
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self.log.info(f"No reference in DB for {reference}", reference=reference)
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self.irc.sendmsg(f"No reference in DB for {reference}")
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return
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amount = float(amount)
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stored_trade["amount"] = float(stored_trade["amount"])
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# Make sure it was sent in the expected currency
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if not stored_trade["currency"] == currency:
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self.irc.sendmsg(f"Currency mismatch, Agora: {stored_trade['currency']} / Revolut: {currency}")
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return
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# Make sure the expected amount was sent
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if not stored_trade["amount"] == amount:
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# If the amount does not match exactly, get the min and max values for our given acceptable margins for trades
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min_amount, max_amount = self.agora.get_acceptable_margins(currency, amount)
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self.irc.sendmsg(f"Amount does not match exactly, trying with margins: min: {min_amount} / max: {max_amount}")
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if not min_amount < stored_trade["amount"] < max_amount:
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self.irc.sendmsg(f"Amount mismatch - not in margins: {stored_trade['amount']} (min: {min_amount} / max: {max_amount}")
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return
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# Make sure the account type was Revolut, as these are completed instantly
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if not account_type == "revolut":
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self.irc.sendmsg(f"Account type is not Revolut: {account_type}")
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return
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self.irc.sendmsg(f"All checks passed, releasing funds for {stored_trade['id']} / {reference}")
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rtrn = self.agora.release_funds(stored_trade["id"])
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self.agora.agora.contact_message_post(stored_trade["id"], "Thanks! Releasing now :)")
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self.irc.sendmsg(dumps(rtrn))
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def new_trade(self, trade_id, buyer, currency, amount, amount_xmr):
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"""
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Called when we have a new trade in Agora.
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Store details in Redis, generate a reference and optionally let the customer know the reference.
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"""
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reference = "".join(choices(ascii_uppercase, k=5))
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reference = f"XMR-{reference}"
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existing_ref = r.get(f"trade.{trade_id}.reference")
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if not existing_ref:
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r.set(f"trade.{trade_id}.reference", reference)
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to_store = {
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"id": trade_id,
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"buyer": buyer,
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"currency": currency,
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"amount": amount,
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"amount_xmr": amount_xmr,
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"reference": reference,
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}
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self.log.info("Storing trade information: {info}", info=str(to_store))
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r.hmset(f"trade.{reference}", to_store)
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self.irc.sendmsg(f"Generated reference for {trade_id}: {reference}")
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if settings.Agora.Send == "1":
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self.agora.agora.contact_message_post(trade_id, f"Hi! When sending the payment please use reference code: {reference}")
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if existing_ref:
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return convert(existing_ref)
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else:
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return reference
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def find_tx(self, reference, amount):
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"""
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Find transactions that match the given reference and amount.
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:param reference: transaction reference in Revolut
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:param amount: transaction amount
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:type reference: string
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:type amount: int
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:return: transaction details or AMOUNT_INVALID, or False
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:rtype: dict or string or bool
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"""
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all_transactions = r.scan(0, match="tx.*")
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for tx_iter in all_transactions[1]:
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tx_obj = r.hgetall(tx_iter)
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if tx_obj[b"reference"] == str.encode(reference):
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if tx_obj[b"amount"] == str.encode(amount):
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return convert(tx_obj)
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else:
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return "AMOUNT_INVALID"
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return False
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def get_refs(self):
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"""
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Get all reference IDs for trades.
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:return: list of trade IDs
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:rtype: list
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"""
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references = []
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ref_keys = r.keys("trade.*.reference")
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for key in ref_keys:
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references.append(r.get(key))
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return convert(references)
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def get_ref_map(self):
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"""
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Get all reference IDs for trades.
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:return: dict of references keyed by TXID
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:rtype: dict
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"""
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references = {}
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ref_keys = r.keys("trade.*.reference")
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for key in ref_keys:
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tx = convert(key).split(".")[1]
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references[tx] = r.get(key)
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return convert(references)
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def get_ref(self, reference):
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"""
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Get a reference ID for a single trade.
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:return: trade ID
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:rtype: string
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"""
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ref_data = r.hgetall(f"trade.{reference}")
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ref_data = convert(ref_data)
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if not ref_data:
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return False
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return ref_data
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def del_ref(self, reference):
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"""
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Delete a given reference from the Redis database.
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"""
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tx = self.ref_to_tx(reference)
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r.delete(f"trade.{reference}")
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r.delete(f"trade.{tx}.reference")
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def cleanup(self, references):
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for tx, reference in self.get_ref_map().items():
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if reference not in references:
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self.log.info("Archiving trade reference: {reference} / TX: {tx}", reference=reference, tx=tx)
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r.rename(f"trade.{tx}.reference", f"archive.trade.{tx}.reference")
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r.rename(f"trade.{reference}", f"archive.trade.{reference}")
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def del_tx(self, txid):
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pass
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def tx_to_ref(self, tx):
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refs = self.get_refs()
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for reference in refs:
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ref_data = convert(r.hgetall(f"trade.{reference}"))
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if not ref_data:
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continue
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if ref_data["id"] == tx:
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return reference
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def ref_to_tx(self, reference):
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ref_data = convert(r.hgetall(f"trade.{reference}"))
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if not ref_data:
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return False
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return ref_data["id"]
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