async def api_lnurlscan(code: str):
try:
url = lnurl.Lnurl(code)
except ValueError:
return jsonify({"message": "invalid lnurl"}), HTTPStatus.BAD_REQUEST
domain = urlparse(url.url).netloc
# params is what will be returned to the client
params: Dict = {"domain": domain}
if url.is_login:
params.update(kind="auth")
params.update(callback=url.url) # with k1 already in it
lnurlauth_key = g.wallet.lnurlauth_key(domain)
params.update(
pubkey=lnurlauth_key.verifying_key.to_string("compressed").hex())
else:
async with httpx.AsyncClient() as client:
r = await client.get(url.url, timeout=40)
if r.is_error:
return (
jsonify({
"domain": domain,
"message": "failed to get parameters"
}),
HTTPStatus.SERVICE_UNAVAILABLE,
)
try:
jdata = json.loads(r.text)
data: lnurl.LnurlResponseModel = lnurl.LnurlResponse.from_dict(
jdata)
except (json.decoder.JSONDecodeError,
lnurl.exceptions.LnurlResponseException):
return (
jsonify({
"domain": domain,
"message": f"got invalid response '{r.text[:200]}'",
}),
HTTPStatus.SERVICE_UNAVAILABLE,
)
if type(data) is lnurl.LnurlChannelResponse:
return (
jsonify({
"domain": domain,
"kind": "channel",
"message": "unsupported"
}),
HTTPStatus.BAD_REQUEST,
)
params.update(**data.dict())
if type(data) is lnurl.LnurlWithdrawResponse:
params.update(kind="withdraw")
params.update(fixed=data.min_withdrawable == data.max_withdrawable)
# callback with k1 already in it
parsed_callback: ParseResult = urlparse(data.callback)
qs: Dict = parse_qs(parsed_callback.query)
qs["k1"] = data.k1
# balanceCheck/balanceNotify
if "balanceCheck" in jdata:
params.update(balanceCheck=jdata["balanceCheck"])
# format callback url and send to client
parsed_callback = parsed_callback._replace(
query=urlencode(qs, doseq=True))
params.update(callback=urlunparse(parsed_callback))
if type(data) is lnurl.LnurlPayResponse:
params.update(kind="pay")
params.update(fixed=data.min_sendable == data.max_sendable)
params.update(description_hash=data.metadata.h)
params.update(description=data.metadata.text)
if data.metadata.images:
image = min(data.metadata.images,
key=lambda image: len(image[1]))
data_uri = "data:" + image[0] + "," + image[1]
params.update(image=data_uri)
params.update(commentAllowed=jdata.get("commentAllowed", 0))
return jsonify(params)
async def api_lnurlscan(code: str):
try:
url = lnurl.Lnurl(code)
except ValueError:
return jsonify({"error": "invalid lnurl"}), HTTPStatus.BAD_REQUEST
domain = urlparse(url.url).netloc
if url.is_login:
return jsonify({
"domain": domain,
"kind": "auth",
"error": "unsupported"
}), HTTPStatus.BAD_REQUEST
async with httpx.AsyncClient() as client:
r = await client.get(url.url, timeout=40)
if r.is_error:
return jsonify({
"domain": domain,
"error": "failed to get parameters"
}), HTTPStatus.SERVICE_UNAVAILABLE
try:
jdata = json.loads(r.text)
data: lnurl.LnurlResponseModel = lnurl.LnurlResponse.from_dict(jdata)
except (json.decoder.JSONDecodeError,
lnurl.exceptions.LnurlResponseException):
return (
jsonify({
"domain": domain,
"error": f"got invalid response '{r.text[:200]}'"
}),
HTTPStatus.SERVICE_UNAVAILABLE,
)
if type(data) is lnurl.LnurlChannelResponse:
return jsonify({
"domain": domain,
"kind": "channel",
"error": "unsupported"
}), HTTPStatus.BAD_REQUEST
params: Dict = data.dict()
if type(data) is lnurl.LnurlWithdrawResponse:
params.update(kind="withdraw")
params.update(fixed=data.min_withdrawable == data.max_withdrawable)
# callback with k1 already in it
parsed_callback: ParseResult = urlparse(data.callback)
qs: Dict = parse_qs(parsed_callback.query)
qs["k1"] = data.k1
parsed_callback = parsed_callback._replace(
query=urlencode(qs, doseq=True))
params.update(callback=urlunparse(parsed_callback))
if type(data) is lnurl.LnurlPayResponse:
params.update(kind="pay")
params.update(fixed=data.min_sendable == data.max_sendable)
params.update(description_hash=data.metadata.h)
params.update(description=data.metadata.text)
if data.metadata.images:
image = min(data.metadata.images, key=lambda image: len(image[1]))
data_uri = "data:" + image[0] + "," + image[1]
params.update(image=data_uri)
params.update(commentAllowed=jdata.get("commentAllowed", 0))
params.update(domain=domain)
return jsonify(params)
