diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..28a76fd --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +.env +node_modules/ +package-lock.json diff --git a/READ.md b/READ.md index 7cec1d3..5d2a93b 100644 --- a/READ.md +++ b/READ.md @@ -2,15 +2,19 @@ # Project Structure ``` + /lightning-app ├── /server -│ ├── index.js # Express app -│ ├── grpc.js # lnd gRPC client setup -│ ├── invoice.js # Invoice creation/listener +│ ├── index.js # Express app +│ ├── grpc.js # lnd gRPC client setup +│ ├── invoice.js # Invoice creation/listener ├── /client -│ ├── index.html # Basic frontend -│ ├── app.js # Fetch invoice, WebSocket events -├── .env.example # Connection variables -├── package.json # Node.js dependencies -├── README.md # Setup instructions +│ ├── index.html # Basic frontend +│ ├── app.js # Fetch invoice, WebSocket events +├── .env.example # Connection variables +├── package.json # Node.js dependencies +├── README.md # Setup instructions + +``` + ``` diff --git a/client/image.png b/client/image.png new file mode 100644 index 0000000..126eab7 Binary files /dev/null and b/client/image.png differ diff --git a/client/index.html b/client/index.html index ff3c2b2..2069c6f 100644 --- a/client/index.html +++ b/client/index.html @@ -1,18 +1,17 @@ - - - + + Lightning Payment App - + - +

Pay with Lightning!

+
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a/package.json b/package.json index 9bdafea..3c53b4c 100644 --- a/package.json +++ b/package.json @@ -1,15 +1,15 @@ { - "name": "lightning-app", - "version": "1.0.0", - "main": "server/index.js", - "scripts": { - "start": "node server/index.js" - }, - "dependencies": { - "express": "^4.17.1", - "cors": "^2.8.5", - "dotenv": "^16.0.3", - "@grpc/grpc-js": "^1.8.14", - "@grpc/proto-loader": "^0.7.7" - } -} \ No newline at end of file + "name": "lightning-app", + "version": "1.0.0", + "main": "server/index.js", + "scripts": { + "start": "node server/index.js" + }, + "dependencies": { + "express": "^4.17.1", + "cors": "^2.8.5", + "dotenv": "^16.0.3", + "@grpc/grpc-js": "^1.8.14", + "@grpc/proto-loader": "^0.7.7" + } +} diff --git a/server/grpc.js b/server/grpc.js index 0a93aa1..bc85bcb 100644 --- a/server/grpc.js +++ b/server/grpc.js @@ -1,28 +1,83 @@ const grpc = require('@grpc/grpc-js'); const protoLoader = require('@grpc/proto-loader'); const fs = require('fs'); +const path = require('path'); require('dotenv').config(); -// Load lnd rpc.proto file -const packageDefinition = protoLoader.loadSync('rpc.proto', {}); -const lnrpc = grpc.loadPackageDefinition(packageDefinition).lnrpc; +// Proto file loading options +const options = { + keepCase: true, + longs: String, + enums: String, + defaults: true, + oneofs: true, +}; +// Load proto file +const packageDefinition = protoLoader.loadSync( + path.join(__dirname, 'rpc.proto'), + options +); -// Load TLS cert -const lndCert = fs.readFileSync(process.env.LND_TLS_CERT); -const sslCreds = grpc.credentials.createSsl(lndCert); +// Load the proto package definition +const lightning = grpc.loadPackageDefinition(packageDefinition); -// Macaroon Auth -const macaroon = fs.readFileSync(process.env.LND_MACAROON).toString('hex'); +// Verify the loaded package +if (!lightning.lnrpc || !lightning.lnrpc.Lightning) { + throw new Error('Failed to load Lightning service from proto file'); +} + +// Load credentials +const tlsCert = fs.readFileSync(process.env.LND_CERT_PATH); +const sslCreds = grpc.credentials.createSsl(tlsCert); + +// Load macaroon +const macaroon = fs.readFileSync(process.env.LND_MACAROON_PATH).toString('hex'); const metadata = new grpc.Metadata(); metadata.add('macaroon', macaroon); -const macaroonCreds = grpc.credentials.createFromMetadataGenerator((_, callback) => { - callback(null, metadata); + +const macaroonCreds = grpc.credentials.createFromMetadataGenerator((_, cb) => { + cb(null, metadata); }); -// Create combined credentials -const creds = grpc.credentials.combineChannelCredentials(sslCreds, macaroonCreds); +// Combine credentials +const credentials = grpc.credentials.combineChannelCredentials( + sslCreds, + macaroonCreds +); + +// Create LND client +const lnrpcClient = new lightning.lnrpc.Lightning( + process.env.LND_GRPC_HOST, + credentials +); + +// Wrap the client methods in promises +const lnd = { + getInfo: () => { + return new Promise((resolve, reject) => { + lnrpcClient.getInfo({}, (err, response) => { + if (err) reject(err); + else resolve(response); + }); + }); + }, + addInvoice: (params) => { + return new Promise((resolve, reject) => { + lnrpcClient.addInvoice(params, (err, response) => { + if (err) reject(err); + else resolve(response); + }); + }); + }, + subscribeInvoices: (params) => { + return lnrpcClient.subscribeInvoices(params); + }, +}; -// Connect to lnd -const lnd = new lnrpc.Lightning(process.env.LND_GRPC_HOST, creds); +// Test connection +lnd + .getInfo() + .then((info) => console.log('Connected to LND:', info.alias)) + .catch((err) => console.error('Failed to connect to LND:', err)); module.exports = lnd; diff --git a/server/index.js b/server/index.js index 1ebed95..675743d 100644 --- a/server/index.js +++ b/server/index.js @@ -1,6 +1,7 @@ const express = require('express'); const { createInvoice, subscribeToInvoices } = require('./invoice'); const cors = require('cors'); +const lnd = require('./grpc'); require('dotenv').config(); const app = express(); @@ -9,19 +10,61 @@ app.use(express.json()); const PORT = 3000; +// Health check endpoint +app.get('/health', (req, res) => { + res.json({ status: 'ok' }); +}); + +// test-connection +app.get('/test-connection', async (req, res) => { + try { + const info = await lnd.getInfo(); + res.json(info); + } catch (err) { + console.error('Connection test failed:', err); + res.status(500).json({ + error: 'Failed to connect to LND node', + details: err.message, + }); + } +}); + // Create Invoice endpoint app.post('/create-invoice', async (req, res) => { - const { amount } = req.body; - try { - const invoice = await createInvoice(amount); - res.json(invoice); - } catch (err) { - console.error(err); - res.status(500).send('Error creating invoice'); - } + console.log('Received request body:', req.body); + + const { amount } = req.body; + + if (!amount || isNaN(amount) || amount <= 0) { + return res.status(400).json({ + error: 'Invalid amount', + details: 'Amount must be a positive number', + }); + } + + try { + const invoice = await createInvoice(parseInt(amount)); + res.json(invoice); + } catch (err) { + console.error('Error creating invoice:', err); + res.status(500).json({ + error: 'Error creating invoice', + details: err.message, + }); + } }); app.listen(PORT, () => { - console.log(`Server listening at http://localhost:${PORT}`); - subscribeToInvoices(); // start payment listener + console.log(`Server listening at http://localhost:${PORT}`); + + // Start invoice subscription with retry mechanism + try { + subscribeToInvoices(); + } catch (error) { + console.error('Failed to start invoice subscription:', error); + } +}); +// Handle uncaught errors +process.on('unhandledRejection', (error) => { + console.error('Unhandled Rejection:', error); }); diff --git a/server/invoice.js b/server/invoice.js index 5b77933..c966263 100644 --- a/server/invoice.js +++ b/server/invoice.js @@ -2,29 +2,47 @@ const lnd = require('./grpc'); // Create Invoice async function createInvoice(amountSats) { - return new Promise((resolve, reject) => { - const request = { - memo: "Test Invoice", - value: amountSats - }; - lnd.AddInvoice(request, (err, response) => { - if (err) { - return reject(err); - } - resolve(response); - }); + try { + if (!amountSats || amountSats <= 0) { + throw new Error('Invalid amount: must be greater than 0'); + } + // Create invoice request + const request = { + value: amountSats.toString(), + memo: 'Test Invoice', + }; + console.log('Creating invoice with request:', request); + + // send request to LND + const response = await lnd.addInvoice(request); + const invoice = { + payment_request: response.payment_request, + r_hash: Buffer.from(response.r_hash).toString('hex'), + add_index: response.add_index?.toString(), + amount: amountSats, + }; + console.log('Successfully created invoice:', invoice); + return invoice; + } catch (error) { + console.error('Error creating invoice:', { + message: error.message, + stack: error.stack, }); + throw error; + } } -// Subscribe to Invoices +// Subscribe to invoice updates function subscribeToInvoices() { - const call = lnd.SubscribeInvoices({}); - call.on('data', (invoice) => { - if (invoice.settled) { - console.log(`Invoice settled! ${invoice.memo}`); - } - }); - call.on('error', console.error); + const call = lnd.subscribeInvoices({}); + call.on('data', (invoice) => { + if (invoice.settled) { + console.log( + `Invoice settled! ${(invoice.payment_request, invoice.memo)}` + ); + } + }); + call.on('Invoice subscription error', console.error); } module.exports = { createInvoice, subscribeToInvoices }; diff --git a/server/rpc.proto b/server/rpc.proto new file mode 100644 index 0000000..3f32170 --- /dev/null +++ b/server/rpc.proto @@ -0,0 +1,77 @@ +syntax = "proto3"; + +package lnrpc; + +service Lightning { + rpc GetInfo (GetInfoRequest) returns (GetInfoResponse); + rpc AddInvoice (Invoice) returns (AddInvoiceResponse); + rpc SubscribeInvoices (InvoiceSubscription) returns (stream Invoice); +} + +message GetInfoRequest {} + +message GetInfoResponse { + string version = 1; + string identity_pubkey = 2; + string alias = 3; + uint32 num_active_channels = 4; + uint32 num_peers = 5; + uint32 block_height = 6; + string network = 7; +} + +message Invoice { + string memo = 1; + bytes r_preimage = 2; + bytes r_hash = 3; + string value = 4; + bool settled = 5; + int64 creation_date = 6; + int64 settle_date = 7; + string payment_request = 8; + string description_hash = 9; + int64 expiry = 10; + string fallback_addr = 11; + int64 cltv_expiry = 12; + repeated RouteHint route_hints = 13; + bool private = 14; + int64 add_index = 15; + int64 settle_index = 16; + int64 amt_paid = 17; + bytes payment_addr = 18; + map features = 19; + string state = 20; + bool is_keysend = 21; + bytes payment_request_hash = 22; + bool is_amp = 23; +} + +message InvoiceSubscription { + uint64 add_index = 1; + uint64 settle_index = 2; +} + +message AddInvoiceResponse { + bytes r_hash = 1; + string payment_request = 2; + uint64 add_index = 3; + bytes payment_addr = 4; +} + +message RouteHint { + repeated HopHint hop_hints = 1; +} + +message HopHint { + string node_id = 1; + uint32 chan_id = 2; + int64 fee_base_msat = 3; + int64 fee_proportional_millionths = 4; + uint32 cltv_expiry_delta = 5; +} + +message Feature { + string name = 1; + bool is_required = 2; + bool is_known = 3; +} diff --git a/server/test-invoice.js b/server/test-invoice.js new file mode 100644 index 0000000..e4f26d8 --- /dev/null +++ b/server/test-invoice.js @@ -0,0 +1,12 @@ +const { createInvoice } = require('./invoice'); + +async function test() { + try { + const invoice = await createInvoice(900); + console.log('Created invoice:', invoice); + } catch (error) { + console.error('Error:', error); + } +} +ss; +test();