From 73ec8deee1be1b135411b85888be0ed0374c97d2 Mon Sep 17 00:00:00 2001
From: Arc <33088785+arcbtc@users.noreply.github.com>
Date: Thu, 2 Apr 2020 07:44:03 +0100
Subject: [PATCH] Create lndgrpc.py

Doesn't work, but hopefully will soon
---
 lnbits/wallets/lndgrpc.py | 92 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 lnbits/wallets/lndgrpc.py

diff --git a/lnbits/wallets/lndgrpc.py b/lnbits/wallets/lndgrpc.py
new file mode 100644
index 00000000..0e6a668a
--- /dev/null
+++ b/lnbits/wallets/lndgrpc.py
@@ -0,0 +1,92 @@
+from os import getenv
+import lnd_grpc # https://github.com/willcl-ark/lnd_grpc/blob/master/lnd_grpc/lightning.py
+from .base import InvoiceResponse, PaymentResponse, PaymentStatus, Wallet
+
+
+class LndWallet(Wallet):
+    """https://api.lightning.community/rest/index.html#lnd-rest-api-reference"""
+
+    def __init__(self):
+
+        endpoint = getenv("LND_GRPC_ENDPOINT")
+        self.endpoint = endpoint[:-1] if endpoint.endswith("/") else endpoint
+        self.port = getenv("LND_GRPC_PORT")
+        self.auth_admin = getenv("LND_ADMIN_MACAROON")
+        self.auth_invoice = getenv("LND_INVOICE_MACAROON")
+        self.auth_read = getenv("LND_READ_MACAROON")
+        self.auth_cert = getenv("LND_CERT")
+
+    def create_invoice(self, amount: int, mem: str = "") -> InvoiceResponse:
+
+        lnd_rpc = lnd_grpc.Client(
+            lnd_dir = None,
+            macaroon_path = self.auth_invoice,
+            tls_cert_path = self.auth_cert,
+            network = 'mainnet',
+            grpc_host = self.endpoint,
+            grpc_port = self.port
+        )
+
+        lndResponse = lnd_rpc.add_invoice(
+            memo = mem,
+            value = amount,
+            expiry = 600,
+            private = True
+        )
+
+        ok, checking_id, payment_request, error_message = True, lndResponse.r_hash, lndResponse.payment_request, None
+
+        return InvoiceResponse(ok, checking_id, payment_request, error_message)
+
+    def pay_invoice(self, bolt11: str) -> PaymentResponse:
+
+        lnd_rpc = lnd_grpc.Client(
+            lnd_dir = None,
+            macaroon_path = self.auth_admin,
+            tls_cert_path = self.auth_cert,
+            network = 'mainnet',
+            grpc_host = self.endpoint,
+            grpc_port = self.port
+        )
+
+        payinvoice = lnd_rpc.pay_invoice( # https://github.com/willcl-ark/lnd_grpc/blob/cf938c51c201f078e8bbe9e19ffc2d038f3abf7f/lnd_grpc/lightning.py#L439
+            payment_request = _payreq,
+        )
+
+        ok, checking_id, fee_msat, error_message = True, None, 0, None
+        
+        if payinvoice.payment_error:
+            ok, error_message = False, payinvoice.payment_error
+        else:
+            checking_id = payinvoice.payment_hash
+
+        return PaymentResponse(ok, checking_id, fee_msat, error_message)
+
+    def get_invoice_status(self, checking_id: str) -> PaymentStatus:
+
+        lnd_rpc = lnd_grpc.Client(
+            lnd_dir = None,
+            macaroon_path = self.auth_invoice,
+            tls_cert_path = self.auth_cert,
+            network = 'mainnet',
+            grpc_host = self.endpoint,
+            grpc_port = self.port
+        )
+
+        for _response in lnd_rpc.subscribe_single_invoice(_hash):
+        # myQueue.put(_response) # ???
+
+            if _response.state == 1:
+            
+                return PaymentStatus("settled")
+
+        invoiceThread = threading.Thread(
+            target=detectPayment,
+            args=[lndResponse.r_hash, ],
+            daemon=True
+        )
+        invoiceThread.start()
+
+    def get_payment_status(self, checking_id: str) -> PaymentStatus:
+        
+        return PaymentStatus(True)