LibrePay/Backend
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Live status of transaction

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This commit is contained in:
Nicolas Klier
2020-12-27 23:27:35 +01:00
parent 8168674516
commit 7f8ae69e2e
12 changed files with 791 additions and 127 deletions
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81
src/helper/invoiceScheduler.ts
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@@ -1,18 +1,21 @@
import { IInvoice } from "../models/invoice/invoice.interface";
import { Subscriber } from 'zeromq';
import { logger, rpcClient } from "../app";
import { logger, rpcClient, socketManager } from "../app";
import { invoiceRouter } from "../routes/invoice";
import { Invoice } from "../models/invoice/invoice.model";
import { PaymentStatus } from "./types";
import { CryptoUnits, PaymentStatus } from "./types";
import { config } from "../../config";
export class InvoiceScheduler {
private pendingInvoices: IInvoice[];
private unconfirmedTranscations: IInvoice[];
private knownConfirmations: Map<string, number>; // Invoice id / confirmation cound
private sock: Subscriber;
constructor() {
this.unconfirmedTranscations = [];
this.pendingInvoices = [];
this.knownConfirmations = new Map<string, number>();
// Get all pending transcations
Invoice.find({ status: PaymentStatus.PENDING }).then(invoices => {
@@ -44,7 +47,7 @@ export class InvoiceScheduler {
logger.info('Now listing for incoming transaction to any invoices ...');
for await (const [topic, msg] of this.sock) {
const rawtx = msg.toString('hex');
logger.debug(`New tx: ${rawtx}`);
//logger.debug(`New tx: ${rawtx}`);
rpcClient.request('decoderawtransaction', [rawtx], (err, decoded) => {
if (err) {
logger.error(`Error while decoding raw tx: ${err.message}`);
@@ -54,19 +57,29 @@ export class InvoiceScheduler {
decoded.result.vout.forEach(output => {
// Loop over each output and check if the address of one matches the one of an invoice.
this.pendingInvoices.forEach(invoice => {
// We found our transaction
if (output.scriptPubKey.addresses === undefined) return; // Sometimes (weird) transaction don't have any addresses
// We found our transaction (https://developer.bitcoin.org/reference/rpc/decoderawtransaction.html)
if (output.scriptPubKey.addresses.indexOf(invoice.receiveAddress) !== -1) {
invoice.paid += output.value;
logger.info(`Transcation for invoice ${invoice.id} received! (${decoded.result.hash})`);
// Change state in database
invoice.status = PaymentStatus.UNCONFIRMED;
invoice.transcationHash = decoded.result.txid;
invoice.save();
// Push to array & remove from pending
this.unconfirmedTranscations.push(invoice);
this.pendingInvoices.splice(this.pendingInvoices.indexOf(invoice), 1);
const price = invoice.paymentMethods.find((item) => { return item.method === CryptoUnits.BITCOIN }).amount;
if (invoice.paid < price - config.transcations.acceptMargin) {
const left = price - output.value;
invoice.status = PaymentStatus.PARTIALLY;
invoice.save();
logger.info(`Transcation for invoice ${invoice.id} received but there are still ${left} BTC missing (${decoded.result.hash})`);
} else {
invoice.status = PaymentStatus.UNCONFIRMED;
invoice.transcationHashes.push(decoded.result.txid);
invoice.save();
// Push to array & remove from pending
this.unconfirmedTranscations.push(invoice);
this.pendingInvoices.splice(this.pendingInvoices.indexOf(invoice), 1);
}
}
})
});
@@ -81,22 +94,40 @@ export class InvoiceScheduler {
private watchConfirmations() {
setInterval(() => {
this.unconfirmedTranscations.forEach(invoice => {
rpcClient.request('gettransaction', [invoice.transcationHash], (err, message) => {
if (err) {
logger.error(`Error while fetching confirmation state of ${invoice.transcationHash}: ${err.message}`);
return;
}
if (invoice.transcationHashes.length === 0) return;
let trustworthy = true; // Will be true if all transactions are above threshold.
if (Number(message.result.confirmations) > 2) {
logger.info(`Transaction (${invoice.transcationHash}) has reached more then 2 confirmations and can now be trusted!`);
invoice.status = PaymentStatus.DONE;
invoice.save(); // This will trigger a post save hook that will notify the user.
for (let i = 0; i < invoice.transcationHashes.length; i++) {
const transcation = invoice.transcationHashes[i];
rpcClient.request('gettransaction', [transcation], (err, message) => {
if (err) {
logger.error(`Error while fetching confirmation state of ${transcation}: ${err.message}`);
trustworthy = false;
this.unconfirmedTranscations.splice(this.unconfirmedTranscations.indexOf(invoice), 1);
} else {
logger.debug(`Transcation (${invoice.transcationHash}) has not reached his threshold yet.`);
}
});
return;
}
if (this.knownConfirmations.get(invoice.id) != message.result.confirmations) {
this.knownConfirmations.set(invoice.id, message.result.confirmations);
socketManager.getSocketByInvoice(invoice).emit('confirmationUpdate', { count: Number(message.result.confirmations) });
}
if (Number(message.result.confirmations) > 0) {
logger.info(`Transaction (${transcation}) has reached more then 2 confirmations and can now be trusted!`);
this.unconfirmedTranscations.splice(this.unconfirmedTranscations.indexOf(invoice), 1);
} else {
trustworthy = false;
logger.debug(`Transcation (${transcation}) has not reached his threshold yet.`);
}
});
}
if (trustworthy) {
invoice.status = PaymentStatus.DONE;
invoice.save(); // This will trigger a post save hook that will notify the user.
}
});
}, 2_000);
}