abstract exchange rates code into a "util".
This commit is contained in:
fiatjaf
parent
5142f1e29f
commit
adc3e62573
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@ -1,48 +0,0 @@
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import trio # type: ignore
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import httpx
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async def get_fiat_rate(currency: str):
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assert currency == "USD", "Only USD is supported as fiat currency."
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return await get_usd_rate()
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async def get_usd_rate():
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"""
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Returns an average satoshi price from multiple sources.
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"""
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satoshi_prices = [None, None, None]
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async def fetch_price(index, url, getter):
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try:
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async with httpx.AsyncClient() as client:
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r = await client.get(url)
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r.raise_for_status()
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satoshi_price = int(100_000_000 / float(getter(r.json())))
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satoshi_prices[index] = satoshi_price
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except Exception:
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pass
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async with trio.open_nursery() as nursery:
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nursery.start_soon(
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fetch_price,
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0,
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"https://api.kraken.com/0/public/Ticker?pair=XXBTZUSD",
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lambda d: d["result"]["XXBTCZUSD"]["c"][0],
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)
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nursery.start_soon(
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fetch_price,
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1,
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"https://www.bitstamp.net/api/v2/ticker/btcusd",
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lambda d: d["last"],
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)
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nursery.start_soon(
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fetch_price,
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2,
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"https://api.coincap.io/v2/rates/bitcoin",
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lambda d: d["data"]["rateUsd"],
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)
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satoshi_prices = [x for x in satoshi_prices if x]
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return sum(satoshi_prices) / len(satoshi_prices)
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@ -5,10 +5,10 @@ from quart import jsonify, url_for, request
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from lnurl import LnurlPayResponse, LnurlPayActionResponse, LnurlErrorResponse # type: ignore
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from lnurl import LnurlPayResponse, LnurlPayActionResponse, LnurlErrorResponse # type: ignore
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from lnbits.core.services import create_invoice
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from lnbits.core.services import create_invoice
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from lnbits.utils.exchange_rates import get_fiat_rate_satoshis
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from . import lnurlp_ext
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from . import lnurlp_ext
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from .crud import increment_pay_link
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from .crud import increment_pay_link
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from .helpers import get_fiat_rate
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@lnurlp_ext.route("/api/v1/lnurl/<link_id>", methods=["GET"])
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@lnurlp_ext.route("/api/v1/lnurl/<link_id>", methods=["GET"])
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@ -17,7 +17,7 @@ async def api_lnurl_response(link_id):
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if not link:
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if not link:
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return jsonify({"status": "ERROR", "reason": "LNURL-pay not found."}), HTTPStatus.OK
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return jsonify({"status": "ERROR", "reason": "LNURL-pay not found."}), HTTPStatus.OK
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rate = await get_fiat_rate(link.currency) if link.currency else 1
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rate = await get_fiat_rate_satoshis(link.currency) if link.currency else 1
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resp = LnurlPayResponse(
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resp = LnurlPayResponse(
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callback=url_for("lnurlp.api_lnurl_callback", link_id=link.id, _external=True),
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callback=url_for("lnurlp.api_lnurl_callback", link_id=link.id, _external=True),
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min_sendable=math.ceil(link.min * rate) * 1000,
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min_sendable=math.ceil(link.min * rate) * 1000,
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@ -39,7 +39,7 @@ async def api_lnurl_callback(link_id):
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return jsonify({"status": "ERROR", "reason": "LNURL-pay not found."}), HTTPStatus.OK
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return jsonify({"status": "ERROR", "reason": "LNURL-pay not found."}), HTTPStatus.OK
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min, max = link.min, link.max
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min, max = link.min, link.max
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rate = await get_fiat_rate(link.currency) if link.currency else 1
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rate = await get_fiat_rate_satoshis(link.currency) if link.currency else 1
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if link.currency:
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if link.currency:
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# allow some fluctuation (as the fiat price may have changed between the calls)
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# allow some fluctuation (as the fiat price may have changed between the calls)
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min = rate * 995 * link.min
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min = rate * 995 * link.min
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@ -4,6 +4,7 @@ from lnurl.exceptions import InvalidUrl as LnurlInvalidUrl # type: ignore
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from lnbits.core.crud import get_user
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from lnbits.core.crud import get_user
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from lnbits.decorators import api_check_wallet_key, api_validate_post_request
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from lnbits.decorators import api_check_wallet_key, api_validate_post_request
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from lnbits.utils.exchange_rates import get_fiat_rate_satoshis
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from . import lnurlp_ext
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from . import lnurlp_ext
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from .crud import (
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from .crud import (
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@ -13,7 +14,6 @@ from .crud import (
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update_pay_link,
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update_pay_link,
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delete_pay_link,
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delete_pay_link,
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)
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)
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from .helpers import get_fiat_rate
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@lnurlp_ext.route("/api/v1/links", methods=["GET"])
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@lnurlp_ext.route("/api/v1/links", methods=["GET"])
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@ -109,7 +109,7 @@ async def api_link_delete(link_id):
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@lnurlp_ext.route("/api/v1/rate/<currency>", methods=["GET"])
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@lnurlp_ext.route("/api/v1/rate/<currency>", methods=["GET"])
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async def api_check_fiat_rate(currency):
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async def api_check_fiat_rate(currency):
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try:
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try:
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rate = await get_fiat_rate(currency)
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rate = await get_fiat_rate_satoshis(currency)
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except AssertionError:
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except AssertionError:
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rate = None
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rate = None
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@ -1,57 +1,9 @@
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import trio # type: ignore
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import httpx
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import base64
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import base64
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import struct
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import struct
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import hmac
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import hmac
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import time
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import time
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async def get_fiat_rate(currency: str):
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assert currency == "USD", "Only USD is supported as fiat currency."
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return await get_usd_rate()
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async def get_usd_rate():
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"""
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Returns an average satoshi price from multiple sources.
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"""
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satoshi_prices = [None, None, None]
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async def fetch_price(index, url, getter):
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try:
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async with httpx.AsyncClient() as client:
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r = await client.get(url)
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r.raise_for_status()
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satoshi_price = int(100_000_000 / float(getter(r.json())))
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satoshi_prices[index] = satoshi_price
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except Exception:
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pass
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async with trio.open_nursery() as nursery:
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nursery.start_soon(
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fetch_price,
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0,
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"https://api.kraken.com/0/public/Ticker?pair=XXBTZUSD",
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lambda d: d["result"]["XXBTCZUSD"]["c"][0],
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)
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nursery.start_soon(
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fetch_price,
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1,
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"https://www.bitstamp.net/api/v2/ticker/btcusd",
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lambda d: d["last"],
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)
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nursery.start_soon(
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fetch_price,
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2,
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"https://api.coincap.io/v2/rates/bitcoin",
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lambda d: d["data"]["rateUsd"],
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)
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satoshi_prices = [x for x in satoshi_prices if x]
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return sum(satoshi_prices) / len(satoshi_prices)
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def hotp(key, counter, digits=6, digest="sha1"):
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def hotp(key, counter, digits=6, digest="sha1"):
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key = base64.b32decode(key.upper() + "=" * ((8 - len(key)) % 8))
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key = base64.b32decode(key.upper() + "=" * ((8 - len(key)) % 8))
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counter = struct.pack(">Q", counter)
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counter = struct.pack(">Q", counter)
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@ -3,10 +3,10 @@ from quart import jsonify, url_for, request
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from lnurl import LnurlPayResponse, LnurlPayActionResponse, LnurlErrorResponse # type: ignore
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from lnurl import LnurlPayResponse, LnurlPayActionResponse, LnurlErrorResponse # type: ignore
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from lnbits.core.services import create_invoice
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from lnbits.core.services import create_invoice
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from lnbits.utils.exchange_rates import fiat_amount_as_satoshis
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from . import offlineshop_ext
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from . import offlineshop_ext
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from .crud import get_shop, get_item
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from .crud import get_shop, get_item
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from .helpers import get_fiat_rate
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@offlineshop_ext.route("/lnurl/<item_id>", methods=["GET"])
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@offlineshop_ext.route("/lnurl/<item_id>", methods=["GET"])
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@ -18,8 +18,7 @@ async def lnurl_response(item_id):
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if not item.enabled:
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if not item.enabled:
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return jsonify({"status": "ERROR", "reason": "Item disabled."})
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return jsonify({"status": "ERROR", "reason": "Item disabled."})
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rate = await get_fiat_rate(item.unit) if item.unit != "sat" else 1
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price_msat = (await fiat_amount_as_satoshis(item.price, item.unit) if item.unit != "sat" else item.price) * 1000
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price_msat = int(item.price * rate) * 1000
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resp = LnurlPayResponse(
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resp = LnurlPayResponse(
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callback=url_for("offlineshop.lnurl_callback", item_id=item.id, _external=True),
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callback=url_for("offlineshop.lnurl_callback", item_id=item.id, _external=True),
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@ -41,10 +40,10 @@ async def lnurl_callback(item_id):
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min = item.price * 1000
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min = item.price * 1000
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max = item.price * 1000
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max = item.price * 1000
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else:
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else:
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rate = await get_fiat_rate(item.unit)
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price = await fiat_amount_as_satoshis(item.price, item.unit)
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# allow some fluctuation (the fiat price may have changed between the calls)
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# allow some fluctuation (the fiat price may have changed between the calls)
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min = int(rate * item.price) * 995
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min = price * 995
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max = int(rate * item.price) * 1010
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max = price * 1010
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amount_received = int(request.args.get("amount"))
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amount_received = int(request.args.get("amount"))
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if amount_received < min:
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if amount_received < min:
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0
lnbits/utils/__init__.py
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0
lnbits/utils/__init__.py
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262
lnbits/utils/exchange_rates.py
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262
lnbits/utils/exchange_rates.py
Normal file
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import trio # type: ignore
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import httpx
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from typing import Callable, NamedTuple
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currencies = {
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"AED": "United Arab Emirates Dirham",
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"AFN": "Afghan Afghani",
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"ALL": "Albanian Lek",
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"AMD": "Armenian Dram",
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"ANG": "Netherlands Antillean Gulden",
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"AOA": "Angolan Kwanza",
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"ARS": "Argentine Peso",
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"AUD": "Australian Dollar",
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"AWG": "Aruban Florin",
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"AZN": "Azerbaijani Manat",
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"BAM": "Bosnia and Herzegovina Convertible Mark",
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"BBD": "Barbadian Dollar",
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"BDT": "Bangladeshi Taka",
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"BGN": "Bulgarian Lev",
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"BHD": "Bahraini Dinar",
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"BIF": "Burundian Franc",
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"BMD": "Bermudian Dollar",
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"BND": "Brunei Dollar",
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"BOB": "Bolivian Boliviano",
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"BRL": "Brazilian Real",
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"BSD": "Bahamian Dollar",
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"BTN": "Bhutanese Ngultrum",
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"BWP": "Botswana Pula",
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"BYN": "Belarusian Ruble",
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"BYR": "Belarusian Ruble",
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"BZD": "Belize Dollar",
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"CAD": "Canadian Dollar",
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"CDF": "Congolese Franc",
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"CHF": "Swiss Franc",
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"CLF": "Unidad de Fomento",
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"CLP": "Chilean Peso",
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"CNH": "Chinese Renminbi Yuan Offshore",
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"CNY": "Chinese Renminbi Yuan",
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"COP": "Colombian Peso",
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"CRC": "Costa Rican Colón",
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"CUC": "Cuban Convertible Peso",
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"CVE": "Cape Verdean Escudo",
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"CZK": "Czech Koruna",
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"DJF": "Djiboutian Franc",
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"DKK": "Danish Krone",
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"DOP": "Dominican Peso",
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"DZD": "Algerian Dinar",
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"EGP": "Egyptian Pound",
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"ERN": "Eritrean Nakfa",
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"ETB": "Ethiopian Birr",
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"EUR": "Euro",
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"FJD": "Fijian Dollar",
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"FKP": "Falkland Pound",
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"GBP": "British Pound",
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"GEL": "Georgian Lari",
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"GGP": "Guernsey Pound",
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"GHS": "Ghanaian Cedi",
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"GIP": "Gibraltar Pound",
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"GMD": "Gambian Dalasi",
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"GNF": "Guinean Franc",
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"GTQ": "Guatemalan Quetzal",
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"GYD": "Guyanese Dollar",
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"HKD": "Hong Kong Dollar",
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"HNL": "Honduran Lempira",
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"HRK": "Croatian Kuna",
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"HTG": "Haitian Gourde",
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"HUF": "Hungarian Forint",
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"IDR": "Indonesian Rupiah",
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"ILS": "Israeli New Sheqel",
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"IMP": "Isle of Man Pound",
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"INR": "Indian Rupee",
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"IQD": "Iraqi Dinar",
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"ISK": "Icelandic Króna",
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"JEP": "Jersey Pound",
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"JMD": "Jamaican Dollar",
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"JOD": "Jordanian Dinar",
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"JPY": "Japanese Yen",
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"KES": "Kenyan Shilling",
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"KGS": "Kyrgyzstani Som",
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"KHR": "Cambodian Riel",
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"KMF": "Comorian Franc",
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"KRW": "South Korean Won",
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"KWD": "Kuwaiti Dinar",
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"KYD": "Cayman Islands Dollar",
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"KZT": "Kazakhstani Tenge",
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"LAK": "Lao Kip",
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"LBP": "Lebanese Pound",
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"LKR": "Sri Lankan Rupee",
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"LRD": "Liberian Dollar",
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"LSL": "Lesotho Loti",
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"LYD": "Libyan Dinar",
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"MAD": "Moroccan Dirham",
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"MDL": "Moldovan Leu",
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"MGA": "Malagasy Ariary",
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"MKD": "Macedonian Denar",
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"MMK": "Myanmar Kyat",
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"MNT": "Mongolian Tögrög",
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"MOP": "Macanese Pataca",
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"MRO": "Mauritanian Ouguiya",
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"MUR": "Mauritian Rupee",
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"MVR": "Maldivian Rufiyaa",
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"MWK": "Malawian Kwacha",
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"MXN": "Mexican Peso",
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"MYR": "Malaysian Ringgit",
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"MZN": "Mozambican Metical",
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"NAD": "Namibian Dollar",
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"NGN": "Nigerian Naira",
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"NIO": "Nicaraguan Córdoba",
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"NOK": "Norwegian Krone",
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"NPR": "Nepalese Rupee",
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"NZD": "New Zealand Dollar",
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"OMR": "Omani Rial",
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"PAB": "Panamanian Balboa",
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"PEN": "Peruvian Sol",
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"PGK": "Papua New Guinean Kina",
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"PHP": "Philippine Peso",
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"PKR": "Pakistani Rupee",
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"PLN": "Polish Złoty",
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"PYG": "Paraguayan Guaraní",
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|
"QAR": "Qatari Riyal",
|
||||||
|
"RON": "Romanian Leu",
|
||||||
|
"RSD": "Serbian Dinar",
|
||||||
|
"RUB": "Russian Ruble",
|
||||||
|
"RWF": "Rwandan Franc",
|
||||||
|
"SAR": "Saudi Riyal",
|
||||||
|
"SBD": "Solomon Islands Dollar",
|
||||||
|
"SCR": "Seychellois Rupee",
|
||||||
|
"SEK": "Swedish Krona",
|
||||||
|
"SGD": "Singapore Dollar",
|
||||||
|
"SHP": "Saint Helenian Pound",
|
||||||
|
"SLL": "Sierra Leonean Leone",
|
||||||
|
"SOS": "Somali Shilling",
|
||||||
|
"SRD": "Surinamese Dollar",
|
||||||
|
"SSP": "South Sudanese Pound",
|
||||||
|
"STD": "São Tomé and Príncipe Dobra",
|
||||||
|
"SVC": "Salvadoran Colón",
|
||||||
|
"SZL": "Swazi Lilangeni",
|
||||||
|
"THB": "Thai Baht",
|
||||||
|
"TJS": "Tajikistani Somoni",
|
||||||
|
"TMT": "Turkmenistani Manat",
|
||||||
|
"TND": "Tunisian Dinar",
|
||||||
|
"TOP": "Tongan Paʻanga",
|
||||||
|
"TRY": "Turkish Lira",
|
||||||
|
"TTD": "Trinidad and Tobago Dollar",
|
||||||
|
"TWD": "New Taiwan Dollar",
|
||||||
|
"TZS": "Tanzanian Shilling",
|
||||||
|
"UAH": "Ukrainian Hryvnia",
|
||||||
|
"UGX": "Ugandan Shilling",
|
||||||
|
"USD": "US Dollar",
|
||||||
|
"UYU": "Uruguayan Peso",
|
||||||
|
"UZS": "Uzbekistan Som",
|
||||||
|
"VEF": "Venezuelan Bolívar",
|
||||||
|
"VES": "Venezuelan Bolívar Soberano",
|
||||||
|
"VND": "Vietnamese Đồng",
|
||||||
|
"VUV": "Vanuatu Vatu",
|
||||||
|
"WST": "Samoan Tala",
|
||||||
|
"XAF": "Central African Cfa Franc",
|
||||||
|
"XAG": "Silver (Troy Ounce)",
|
||||||
|
"XAU": "Gold (Troy Ounce)",
|
||||||
|
"XCD": "East Caribbean Dollar",
|
||||||
|
"XDR": "Special Drawing Rights",
|
||||||
|
"XOF": "West African Cfa Franc",
|
||||||
|
"XPD": "Palladium",
|
||||||
|
"XPF": "Cfp Franc",
|
||||||
|
"XPT": "Platinum",
|
||||||
|
"YER": "Yemeni Rial",
|
||||||
|
"ZAR": "South African Rand",
|
||||||
|
"ZMW": "Zambian Kwacha",
|
||||||
|
"ZWL": "Zimbabwean Dollar",
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
class Provider(NamedTuple):
|
||||||
|
name: str
|
||||||
|
domain: str
|
||||||
|
api_url: str
|
||||||
|
getter: Callable
|
||||||
|
|
||||||
|
|
||||||
|
exchange_rate_providers = {
|
||||||
|
"bitfinex": Provider(
|
||||||
|
"Bitfinex",
|
||||||
|
"bitfinex.com",
|
||||||
|
"https://api.bitfinex.com/v1/pubticker/{from}{to}",
|
||||||
|
lambda data, replacements: data["last_price"],
|
||||||
|
),
|
||||||
|
"bitstamp": Provider(
|
||||||
|
"Bitstamp",
|
||||||
|
"bitstamp.net",
|
||||||
|
"https://www.bitstamp.net/api/v2/ticker/{from}{to}/",
|
||||||
|
lambda data, replacements: data["last"],
|
||||||
|
),
|
||||||
|
"coinbase": Provider(
|
||||||
|
"Coinbase",
|
||||||
|
"coinbase.com",
|
||||||
|
"https://api.coinbase.com/v2/exchange-rates?currency={FROM}",
|
||||||
|
lambda data, replacements: data["data"]["rates"][replacements["TO"]],
|
||||||
|
),
|
||||||
|
"coinmate": Provider(
|
||||||
|
"CoinMate",
|
||||||
|
"coinmate.io",
|
||||||
|
"https://coinmate.io/api/ticker?currencyPair={FROM}_{TO}",
|
||||||
|
lambda data, replacements: data["data"]["last"],
|
||||||
|
),
|
||||||
|
"kraken": Provider(
|
||||||
|
"Kraken",
|
||||||
|
"kraken.com",
|
||||||
|
"https://api.kraken.com/0/public/Ticker?pair=XBT{TO}",
|
||||||
|
lambda data, replacements: data["result"]["XXBTZ" + replacements["TO"]]["c"][0],
|
||||||
|
),
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
async def btc_price(currency: str) -> float:
|
||||||
|
replacements = {"FROM": "BTC", "from": "btc", "TO": currency.upper(), "to": currency.lower()}
|
||||||
|
rates = []
|
||||||
|
send_channel, receive_channel = trio.open_memory_channel(0)
|
||||||
|
|
||||||
|
async def controller(nursery):
|
||||||
|
failures = 0
|
||||||
|
while True:
|
||||||
|
rate = await receive_channel.receive()
|
||||||
|
if rate:
|
||||||
|
rates.append(rate)
|
||||||
|
else:
|
||||||
|
failures += 1
|
||||||
|
if len(rates) >= 2 or len(rates) == 1 and failures >= 2:
|
||||||
|
nursery.cancel_scope.cancel()
|
||||||
|
break
|
||||||
|
if failures == len(exchange_rate_providers):
|
||||||
|
nursery.cancel_scope.cancel()
|
||||||
|
break
|
||||||
|
|
||||||
|
async def fetch_price(key: str, provider: Provider):
|
||||||
|
try:
|
||||||
|
url = provider.api_url.format(**replacements)
|
||||||
|
async with httpx.AsyncClient() as client:
|
||||||
|
r = await client.get(url, timeout=0.5)
|
||||||
|
r.raise_for_status()
|
||||||
|
data = r.json()
|
||||||
|
rate = float(provider.getter(data, replacements))
|
||||||
|
await send_channel.send(rate)
|
||||||
|
except Exception:
|
||||||
|
await send_channel.send(None)
|
||||||
|
|
||||||
|
async with trio.open_nursery() as nursery:
|
||||||
|
nursery.start_soon(controller, nursery)
|
||||||
|
for key, provider in exchange_rate_providers.items():
|
||||||
|
nursery.start_soon(fetch_price, key, provider)
|
||||||
|
|
||||||
|
if not rates:
|
||||||
|
return 9999999999
|
||||||
|
|
||||||
|
return sum([rate for rate in rates]) / len(rates)
|
||||||
|
|
||||||
|
|
||||||
|
async def get_fiat_rate_satoshis(currency: str) -> float:
|
||||||
|
return int(100_000_000 / (await btc_price(currency)))
|
||||||
|
|
||||||
|
|
||||||
|
async def fiat_amount_as_satoshis(amount: float, currency: str) -> int:
|
||||||
|
return int(amount * (await get_fiat_rate_satoshis(currency)))
|
||||||
Loading…
Reference in New Issue
Block a user