FIX: adjusted fees; cache invalidation

class/Paym.js

@@ -12,6 +12,10 @@ export class Paym {
     this._isPaid = null;
   }
 
+  get fee() {
+    return 0.003;
+  }
+
   setInvoice(bolt11) {
     this._bolt11 = bolt11;
   }
@@ -69,7 +73,7 @@ export class Paym {
     if (payment && payment.payment_route && payment.payment_route.total_amt_msat) {
       // paid just now
       this._isPaid = true;
-      payment.payment_route.total_fees = +payment.payment_route.total_fees + Math.floor(+payment.payment_route.total_amt * 0.01);
+      payment.payment_route.total_fees = +payment.payment_route.total_fees + Math.floor(+payment.payment_route.total_amt * Paym.fee);
       if (this._bolt11) payment.pay_req = this._bolt11;
       if (this._decoded) payment.decoded = this._decoded;
     }

class/User.js

@@ -173,7 +173,12 @@ export class User {
   async saveBalance(balance) {
     const key = 'balance_for_' + this._userid;
     await this._redis.set(key, balance);
-    await this._redis.expire(key, 3600 * 24);
+    await this._redis.expire(key, 3600);
+  }
+
+  async clearBalanceCache() {
+    const key = 'balance_for_' + this._userid;
+    return this._redis.del(key);
   }
 
   async savePaidLndInvoice(doc) {

controllers/api.js

@@ -170,7 +170,7 @@ router.post('/payinvoice', async function(req, res) {
           timestamp: parseInt(+new Date() / 1000),
           type: 'paid_invoice',
           value: +info.num_satoshis + Math.floor(info.num_satoshis * 0.01),
-          fee: Math.floor(info.num_satoshis * 0.01),
+          fee: Math.floor(info.num_satoshis * Paym.fee),
           memo: decodeURIComponent(info.description),
         });
 
@@ -189,11 +189,10 @@ router.post('/payinvoice', async function(req, res) {
         if (payment && payment.payment_route && payment.payment_route.total_amt_msat) {
           let PaymentShallow = new Paym(false, false, false);
           payment = PaymentShallow.processSendPaymentResponse(payment);
-          userBalance -= +payment.payment_route.total_fees + +payment.payment_route.total_amt;
-          u.saveBalance(userBalance);
           payment.pay_req = req.body.invoice;
           payment.decoded = info;
           await u.savePaidLndInvoice(payment);
+          await u.clearBalanceCache();
           lock.releaseLock();
           res.send(payment);
         } else {