def callback(account: str, request: Request) -> Response:
if request.data.get("id"):
if not isinstance(request.data.get("id"), str):
return render_error_response(_("bad ID value, expected str"))
elif (
request.data.get("account")
or request.data.get("memo")
or request.data.get("memo_type")
):
return render_error_response(
_(
"requests with 'id' cannot also have 'account', 'memo', or 'memo_type'"
)
)
elif account != request.data.get("account"):
return render_error_response(
_("The account specified does not match authorization token"),
status_code=403,
)
try:
# validate memo and memo_type
make_memo(request.data.get("memo"), request.data.get("memo_type"))
except ValueError:
return render_error_response(_("invalid 'memo' for 'memo_type'"))
callback_url = request.data.get("url")
if not callback_url:
return render_error_response(_("callback 'url' required"))
schemes = ["https"] if not settings.LOCAL_MODE else ["https", "http"]
try:
URLValidator(schemes=schemes)(request.data.get("url"))
except ValidationError:
return render_error_response(_("'url' must be a valid URL"))
try:
rci.callback(
{
"id": request.data.get("id"),
"account": account,
"memo": request.data.get("memo"),
"memo_type": request.data.get("memo_type"),
"url": callback_url,
}
)
except ValueError as e:
return render_error_response(str(e), status_code=400)
except ObjectDoesNotExist as e:
return render_error_response(str(e), status_code=404)
except NotImplementedError:
return render_error_response(_("not implemented"), status_code=501)
return Response({"success": True})
def delete(account_from_auth: str, request: Request, account: str,) -> Response:
if account_from_auth != account:
return render_error_response(_("account not found"), status_code=404)
try:
make_memo(request.data.get("memo"), request.data.get("memo_type"))
except ValueError:
return render_error_response(_("invalid 'memo' for 'memo_type'"))
try:
rci.delete(account, request.data.get("memo"), request.data.get("memo_type"))
except ObjectDoesNotExist:
return render_error_response(_("account not found"), status_code=404)
else:
return Response({"status": "success"}, status=200)
def get(account: str, request: Request) -> Response:
if request.GET.get("account") and account != request.GET.get("account"):
return render_error_response(
_("The account specified does not match authorization token"),
status_code=403,
)
elif request.GET.get("id") and (
request.GET.get("account")
or request.GET.get("memo")
or request.GET.get("memo_type")
):
return render_error_response(
_(
"requests with 'id' cannot also have 'account', 'memo', or 'memo_type'"
)
)
try:
# validate memo and memo_type
make_memo(request.GET.get("memo"), request.GET.get("memo_type"))
except ValueError:
return render_error_response(_("invalid 'memo' for 'memo_type'"))
try:
response_data = rci.get(
{
"id": request.GET.get("id"),
"sep10_client_account": account,
"account": request.GET.get("account"),
"memo": request.GET.get("memo"),
"memo_type": request.GET.get("memo_type"),
"type": request.GET.get("type"),
"lang": request.GET.get("lang"),
}
)
except ValueError as e:
return render_error_response(str(e), status_code=400)
except ObjectDoesNotExist as e:
return render_error_response(str(e), status_code=404)
try:
validate_response_data(response_data)
except ValueError:
logger.exception(
_("An exception was raised validating GET /customer response")
)
return render_error_response(
_("unable to process request."), status_code=500
)
return Response(response_data)
def put(account: str, request: Request) -> Response:
if request.data.get("id"):
if not isinstance(request.data.get("id"), str):
return render_error_response(_("bad ID value, expected str"))
elif (
request.data.get("account")
or request.data.get("memo")
or request.data.get("memo_type")
):
return render_error_response(
_(
"requests with 'id' cannot also have 'account', 'memo', or 'memo_type'"
)
)
elif account != request.data.get("account"):
return render_error_response(
_("The account specified does not match authorization token"),
status_code=403,
)
try:
# validate memo and memo_type
make_memo(request.data.get("memo"), request.data.get("memo_type"))
except ValueError:
return render_error_response(_("invalid 'memo' for 'memo_type'"))
try:
customer_id = rci.put(
{
"id": request.data.get("id"),
"account": account,
"memo": request.data.get("memo"),
"memo_type": request.data.get("memo_type"),
"type": request.data.get("type"),
**extract_sep9_fields(request.data),
}
)
except ValueError as e:
return render_error_response(str(e), status_code=400)
except ObjectDoesNotExist as e:
return render_error_response(str(e), status_code=404)
if not isinstance(customer_id, str):
logger.error(
"Invalid customer ID returned from put() integration. Must be str."
)
return render_error_response(_("unable to process request"))
return Response({"id": customer_id}, status=202)
def parse_request_args(request: Request) -> Dict:
asset = Asset.objects.filter(code=request.GET.get("asset_code"),
sep6_enabled=True,
withdrawal_enabled=True).first()
if not asset:
return {"error": render_error_response(_("invalid 'asset_code'"))}
lang = request.GET.get("lang")
if lang:
err_resp = validate_language(lang)
if err_resp:
return {"error": err_resp}
activate_lang_for_request(lang)
memo_type = request.GET.get("memo_type")
if memo_type and memo_type not in Transaction.MEMO_TYPES:
return {"error": render_error_response(_("invalid 'memo_type'"))}
try:
make_memo(request.GET.get("memo"), memo_type)
except (ValueError, MemoInvalidException):
return {
"error": render_error_response(_("invalid 'memo' for 'memo_type'"))
}
if not request.GET.get("type"):
return {"error": render_error_response(_("'type' is required"))}
if not request.GET.get("dest"):
return {"error": render_error_response(_("'dest' is required"))}
args = {
"asset": asset,
"memo_type": memo_type,
"memo": request.GET.get("memo"),
"lang": request.GET.get("lang"),
"type": request.GET.get("type"),
"dest": request.GET.get("dest"),
"dest_extra": request.GET.get("dest_extra"),
**extract_sep9_fields(request.GET),
}
# add remaining extra params, it's on the anchor to validate them
for param, value in request.GET.items():
if param not in args:
args[param] = value
return args
def create_deposit_envelope(transaction,
source_account) -> TransactionEnvelope:
payment_amount = round(
Decimal(transaction.amount_in) - Decimal(transaction.amount_fee),
transaction.asset.significant_decimals,
)
builder = TransactionBuilder(
source_account=source_account,
network_passphrase=settings.STELLAR_NETWORK_PASSPHRASE,
# only one operation, so base_fee will be multipled by 1
base_fee=settings.MAX_TRANSACTION_FEE_STROOPS
or settings.HORIZON_SERVER.fetch_base_fee(),
)
_, json_resp = get_account_obj(
Keypair.from_public_key(transaction.stellar_account))
if transaction.claimable_balance_supported and is_pending_trust(
transaction, json_resp):
logger.debug(
f"Crafting claimable balance operation for Transaction {transaction.id}"
)
claimant = Claimant(destination=transaction.stellar_account)
asset = Asset(code=transaction.asset.code,
issuer=transaction.asset.issuer)
builder.append_create_claimable_balance_op(
claimants=[claimant],
asset=asset,
amount=str(payment_amount),
source=transaction.asset.distribution_account,
)
else:
builder.append_payment_op(
destination=transaction.stellar_account,
asset_code=transaction.asset.code,
asset_issuer=transaction.asset.issuer,
amount=str(payment_amount),
source=transaction.asset.distribution_account,
)
if transaction.memo:
builder.add_memo(make_memo(transaction.memo,
transaction.memo_type))
return builder.build()
def deposit(account: str, client_domain: Optional[str],
request: Request) -> Response:
"""
POST /transactions/deposit/interactive
Creates an `incomplete` deposit Transaction object in the database and
returns the URL entry-point for the interactive flow.
"""
asset_code = request.data.get("asset_code")
stellar_account = request.data.get("account")
lang = request.data.get("lang")
sep9_fields = extract_sep9_fields(request.data)
claimable_balance_supported = request.data.get(
"claimable_balance_supported")
if not claimable_balance_supported:
claimable_balance_supported = False
elif isinstance(claimable_balance_supported, str):
if claimable_balance_supported.lower() not in ["true", "false"]:
return render_error_response(
_("'claimable_balance_supported' value must be 'true' or 'false'"
))
claimable_balance_supported = claimable_balance_supported.lower(
) == "true"
elif not isinstance(claimable_balance_supported, bool):
return render_error_response(
_("unexpected data type for 'claimable_balance_supprted'. Expected string or boolean."
))
if lang:
err_resp = validate_language(lang)
if err_resp:
return err_resp
activate_lang_for_request(lang)
# Verify that the request is valid.
if not all([asset_code, stellar_account]):
return render_error_response(
_("`asset_code` and `account` are required parameters"))
# Ensure memo won't cause stellar transaction to fail when submitted
try:
make_memo(request.data.get("memo"), request.data.get("memo_type"))
except ValueError:
return render_error_response(_("invalid 'memo' for 'memo_type'"))
# Verify that the asset code exists in our database, with deposit enabled.
asset = Asset.objects.filter(code=asset_code).first()
if not asset:
return render_error_response(_("unknown asset: %s") % asset_code)
elif not (asset.deposit_enabled and asset.sep24_enabled):
return render_error_response(
_("invalid operation for asset %s") % asset_code)
amount = None
if request.data.get("amount"):
try:
amount = Decimal(request.data.get("amount"))
except DecimalException:
return render_error_response(_("invalid 'amount'"))
if not (asset.deposit_min_amount <= amount <=
asset.deposit_max_amount):
return render_error_response(_("invalid 'amount'"))
try:
Keypair.from_public_key(stellar_account)
except Ed25519PublicKeyInvalidError:
return render_error_response(_("invalid 'account'"))
try:
rdi.save_sep9_fields(
stellar_account,
sep9_fields,
lang,
)
except ValueError as e:
# The anchor found a validation error in the sep-9 fields POSTed by
# the wallet. The error string returned should be in the language
# specified in the request.
return render_error_response(str(e))
# Construct interactive deposit pop-up URL.
transaction_id = create_transaction_id()
Transaction.objects.create(
id=transaction_id,
stellar_account=account,
asset=asset,
kind=Transaction.KIND.deposit,
status=Transaction.STATUS.incomplete,
to_address=account,
protocol=Transaction.PROTOCOL.sep24,
claimable_balance_supported=claimable_balance_supported,
memo=request.data.get("memo"),
memo_type=request.data.get("memo_type") or Transaction.MEMO_TYPES.hash,
more_info_url=request.build_absolute_uri(
f"{reverse('more_info')}?id={transaction_id}"),
client_domain=client_domain,
)
logger.info(f"Created deposit transaction {transaction_id}")
url = interactive_url(
request,
str(transaction_id),
account,
asset_code,
settings.OPERATION_DEPOSIT,
amount,
)
return Response(
{
"type": "interactive_customer_info_needed",
"url": url,
"id": transaction_id
},
status=status.HTTP_200_OK,
)
def parse_request_args(request: Request) -> Dict:
asset = Asset.objects.filter(code=request.GET.get("asset_code"),
sep6_enabled=True,
withdrawal_enabled=True).first()
if not asset:
return {"error": render_error_response(_("invalid 'asset_code'"))}
lang = request.GET.get("lang")
if lang:
err_resp = validate_language(lang)
if err_resp:
return {"error": err_resp}
activate_lang_for_request(lang)
memo_type = request.GET.get("memo_type")
if memo_type and memo_type not in Transaction.MEMO_TYPES:
return {"error": render_error_response(_("invalid 'memo_type'"))}
try:
make_memo(request.GET.get("memo"), memo_type)
except (ValueError, MemoInvalidException):
return {
"error": render_error_response(_("invalid 'memo' for 'memo_type'"))
}
if not request.GET.get("type"):
return {"error": render_error_response(_("'type' is required"))}
if not request.GET.get("dest"):
return {"error": render_error_response(_("'dest' is required"))}
on_change_callback = request.GET.get("on_change_callback")
if on_change_callback and on_change_callback.lower() != "postmessage":
schemes = ["https"] if not settings.LOCAL_MODE else ["https", "http"]
try:
URLValidator(schemes=schemes)(on_change_callback)
except ValidationError:
return {
"error":
render_error_response(_("invalid callback URL provided"))
}
if any(domain in on_change_callback
for domain in settings.CALLBACK_REQUEST_DOMAIN_DENYLIST):
on_change_callback = None
amount = request.GET.get("amount")
if amount:
try:
amount = round(Decimal(amount), asset.significant_decimals)
except DecimalException:
return {"error": render_error_response(_("invalid 'amount'"))}
min_amount = round(asset.withdrawal_min_amount,
asset.significant_decimals)
max_amount = round(asset.withdrawal_max_amount,
asset.significant_decimals)
if not (min_amount <= amount <= max_amount):
return {
"error":
render_error_response(
_("'amount' must be within [%s, %s]") %
(min_amount, min_amount))
}
args = {
"asset": asset,
"memo_type": memo_type,
"memo": request.GET.get("memo"),
"lang": request.GET.get("lang"),
"type": request.GET.get("type"),
"dest": request.GET.get("dest"),
"dest_extra": request.GET.get("dest_extra"),
"on_change_callback": on_change_callback,
"amount": amount,
"country_code": request.GET.get("country_code"),
**extract_sep9_fields(request.GET),
}
# add remaining extra params, it's on the anchor to validate them
for param, value in request.GET.items():
if param not in args:
args[param] = value
return args
