Save exchange rate with invoice

- Fix issue where completed invoices were flagged as expired

src/controllers/invoice.ts

@@ -72,7 +72,6 @@ export async function createInvoice(req: Request, res: Response) {
     const request = await got.get(`https://api.coingecko.com/api/v3/simple/price?ids=${cgFormat.join(',')}&vs_currencies=${currency.toLowerCase()}`, {
         responseType: 'json'
     });
-    console.log(request.body);
 
     // Calulate total price, if cart is provided
     if (cart !== undefined && totalPrice === undefined) {
@@ -82,12 +81,10 @@ export async function createInvoice(req: Request, res: Response) {
     let paymentMethods: IPaymentMethod[] = [];
     
     cgFormat.forEach(coinFullName => {
-        console.log(coinFullName);
         const coin = CryptoUnits[coinFullName.toUpperCase()];
+        const exRate = Number(request.body[coinFullName][currency.toLowerCase()]);
 
-        paymentMethods.push({ method: coin, amount:  
-            roundNumber(totalPrice / Number(request.body[coinFullName][currency.toLowerCase()]), decimalPlaces.get(coin))
-        });
+        paymentMethods.push({ exRate, method: coin, amount: roundNumber(totalPrice / exRate, decimalPlaces.get(coin))});
     });
 
     const dueBy = new Date(Date.now() + 1000 * 60 * 15);    
@@ -103,7 +100,7 @@ export async function createInvoice(req: Request, res: Response) {
         dueBy
     }, (error, invoice: IInvoice) => {
         if (error) {
-            res.status(500).send({error: error.message});
+            res.status(500).send({message: error.message});
             return;
         }
 
@@ -220,7 +217,6 @@ export async function setPaymentMethod(req: Request, res: Response) {
         return;
     }
 
-
     invoice.status = PaymentStatus.PENDING;
     invoice.paymentMethod = CryptoUnits[findCryptoBySymbol(method)];
     invoice.receiveAddress = await providerManager.getProvider(invoice.paymentMethod).getNewAddress();

src/helper/backendProvider.ts

@@ -79,7 +79,7 @@ export abstract class BackendProvider {
      * 
      * *Mainly used when LibrePay starts.*
      */
-    abstract validateInvoices(invoices: IInvoice[]): void;
+    abstract validateInvoice(invoices: IInvoice): void;
 }
 
 export interface ITransactionDetails {

src/helper/invoiceManager.ts

@@ -16,16 +16,13 @@ export class InvoiceManager {
         this.pendingInvoices = [];
         this.knownConfirmations = new Map<string, number>();
 
-        // Get all pending transcations
-        Invoice.find({ status: PaymentStatus.PENDING }).then(invoices => {
-            logger.info(`There are ${invoices.length} invoices pending`);
-            providerManager.getProvider(CryptoUnits.BITCOIN).validateInvoices(invoices);
-        });
+        // Get all pending and unconfirmed transcations
+        Invoice.find({ $or: [ { status: PaymentStatus.PENDING }, { status: PaymentStatus.UNCONFIRMED } ]}).then(invoices => {
+            logger.info(`There are ${invoices.length} invoices that are pending or unconfirmed`);
 
-        // Get all unconfirmed transactions
-        Invoice.find({ status: PaymentStatus.UNCONFIRMED }).then(invoices => {
-            logger.info(`There are ${invoices.length} invoices unconfirmed`);
-            providerManager.getProvider(CryptoUnits.BITCOIN).validateInvoices(invoices);
+            invoices.forEach(invoice => {
+                providerManager.getProvider(invoice.paymentMethod).validateInvoice(invoice);
+            });
         });
 
         this.expireScheduler();
@@ -36,6 +33,7 @@ export class InvoiceManager {
      */
     private expireScheduler() {
         setInterval(async () => {
+            // Find invoices that are pending or requested and reached there EOF date
             const expiredInvoices = await Invoice.find({
                 dueBy: { $lte: new Date() },
                 $or: [ { status: PaymentStatus.PENDING }, { status: PaymentStatus.REQUESTED } ]
@@ -180,7 +178,6 @@ export class InvoiceManager {
              */
             logger.warning(`Transaction (${tx}) did not sent requested funds. (sent: ${receivedTranscation.amount} BTC, requested: ${price} BTC)`);
             invoice.status = PaymentStatus.TOOLITTLE;
-            this.removeInvoice(invoice);
 
             await invoice.save();
 

src/helper/providers/bitcoinBlockchain.js

@@ -0,0 +1,12 @@
+import { BackendProvider } from "../backendProvider";
+import { CryptoUnits } from "../types";
+
+export class Provider implements BackendProvider {
+
+    NAME = 'Bitcoin Blockchain';
+    DESCRIPTION = 'This provider queries the API backend provider by blockchain.com';
+    AUTHOR = 'LibrePay Team';
+    VERSION = '0.1'
+    CRYPTO = CryptoUnits.BITCOIN;
+
+}

src/helper/providers/bitcoinCore.ts

@@ -1,9 +1,8 @@
 import { Subscriber } from 'zeromq';
 
-import { config } from '../../../config';
 import { invoiceManager, logger, rpcClient } from '../../app';
 import { IInvoice } from '../../models/invoice/invoice.interface';
-import { BackendProvider, IRawTransaction, ITransaction, ITransactionDetails, ITransactionList } from '../backendProvider';
+import { BackendProvider, IRawTransaction, ITransaction, ITransactionList } from '../backendProvider';
 import { CryptoUnits, PaymentStatus } from '../types';
 
 export class Provider implements BackendProvider {
@@ -79,8 +78,6 @@ export class Provider implements BackendProvider {
                         return;
                     }
                     
-                    console.log('sendToAddress:', decoded.result);
-                    
                     resolve(decoded.result.txid);
                 });
             });
@@ -125,8 +122,7 @@ export class Provider implements BackendProvider {
         }, 2_000);
     }
     
-    async validateInvoices(invoices: IInvoice[]) {
-        invoices.forEach(async invoice => {
+    async validateInvoice(invoice: IInvoice) {
         if (invoice.status === PaymentStatus.DONE || invoice.status === PaymentStatus.CANCELLED) return;
         if (invoice.paymentMethod !== CryptoUnits.BITCOIN) return;
 
@@ -139,13 +135,10 @@ export class Provider implements BackendProvider {
             const res = message.result[0] as ITransactionList;
             if (res === undefined) return;
 
-                console.log(res);                
-
             res.txids.forEach(async tx => {
                 invoiceManager.validatePayment(invoice, tx);
             });
         });
-        });
     }
 }
 

src/models/invoice/invoice.interface.ts

@@ -10,7 +10,8 @@ export interface ICart {
 
 export interface IPaymentMethod {
     method: CryptoUnits;
-    amount: number
+    amount: number;
+    exRate: number;
 }
 
 export interface IInvoice extends Document {

src/models/invoice/invoice.schema.ts

@@ -1,5 +1,5 @@
 import { Schema } from 'mongoose';
-import { socketManager } from '../../app';
+import { invoiceManager, socketManager } from '../../app';
 import { CryptoUnits, FiatUnits, PaymentStatus } from '../../helper/types';
 import { ICart, IInvoice } from './invoice.interface';
 
@@ -14,7 +14,8 @@ const schemaCart = new Schema({
 
 const schemaPaymentMethods = new Schema({
     method: { type: String, enum: Object.values(CryptoUnits), required: true },
-    amount: { type: Number, required: false }
+    amount: { type: Number, required: false },
+    exRate: { type: Number, required: true },   // Exchange rate at creation
 }, { _id: false });
 
 const schemaInvoice = new Schema({
@@ -60,6 +61,12 @@ schemaInvoice.post('validate', function (doc, next) {
 
 function updateStatus(doc: IInvoice, next) {
     socketManager.emitInvoiceEvent(doc, 'status', doc.status);
+
+    // If a status has a negative value, then this invoice has failed.
+    if (doc.status < 0) {
+        invoiceManager.removeInvoice(doc);
+    }
+
     next();
 }
 

src/routes/invoice.ts

@@ -1,13 +1,18 @@
 import { Router } from "express";
-import { createInvoice, getConfirmation, getInvoice, getPaymentMethods, setPaymentMethod } from "../controllers/invoice";
+import { cancelInvoice, createInvoice, getConfirmation, getInvoice, getPaymentMethods, setPaymentMethod } from "../controllers/invoice";
 import { MW_User } from "../controllers/user";
 
 const invoiceRouter = Router()
 
+// Get general information
 invoiceRouter.get('/paymentmethods', getPaymentMethods);
+
+// Actions related to specific invoices
 invoiceRouter.get('/:selector', getInvoice);
+invoiceRouter.delete('/:selector', cancelInvoice);
 invoiceRouter.get('/:selector/confirmation', getConfirmation);
 invoiceRouter.post('/:selector/setmethod', setPaymentMethod);
+
 invoiceRouter.get('/', MW_User, getInvoice);
 invoiceRouter.post('/', MW_User, createInvoice);