support description_hash across all APIs.

lnbits/wallets/lndgrpc.py

@@ -23,7 +23,7 @@ class LndWallet(Wallet):
         self.auth_read = getenv("LND_READ_MACAROON")
         self.auth_cert = getenv("LND_CERT")
 
-    def create_invoice(self, amount: int, memo: str = "") -> InvoiceResponse:
+    def create_invoice(self, amount: int, memo: str = "", description_hash: bytes = b"") -> InvoiceResponse:
         lnd_rpc = lnd_grpc.Client(
             lnd_dir=None,
             macaroon_path=self.auth_invoice,
@@ -33,7 +33,13 @@ class LndWallet(Wallet):
             grpc_port=self.port,
         )
 
-        lndResponse = lnd_rpc.add_invoice(memo=memo, value=amount, expiry=600, private=True)
+        lndResponse = lnd_rpc.add_invoice(
+            memo=memo,
+            description_hash=base64.b64encode(description_hash).decode("ascii"),
+            value=amount,
+            expiry=600,
+            private=True,
+        )
         decoded_hash = base64.b64encode(lndResponse.r_hash).decode("utf-8").replace("/", "_")
         print(lndResponse.r_hash)
         ok, checking_id, payment_request, error_message = True, decoded_hash, str(lndResponse.payment_request), None