New abstract structure

Events for invoices get emitted in rooms

src/models/invoice/invoice.interface.ts

@@ -17,29 +17,26 @@ export interface IInvoice extends Document {
     selector: string;
     
     // Available payment methods
-    // [{ method: 'btc', amount: 0.0000105 }]
+    // { method: 'btc', amount: 0.0000105 }
     paymentMethods: IPaymentMethod[];
 
+    // This is the method choosen by the user
+    paymentMethod?: CryptoUnits;
+
+    // Will be created as soon as the user picked one options
     // 1Kss3e9iPB9vTgWJJZ1SZNkkFKcFJXPz9t
-    receiveAddress: string;
-
-    paidWith?: CryptoUnits;
-
-    // Already paid amount, in case that not the entire amount was paid with once.
-    // 0.000013
-    paid?: number;
+    receiveAddress?: string;
 
     // Is set when invoice got paid
     // 3b38c3a215d4e7981e1516b2dcbf76fca58911274d5d55b3d615274d6e10f2c1
-    transcationHashes?: string[];
+    transcationHashes?: string;
 
     cart?: ICart[];
     totalPrice?: number;
     currency: FiatUnits;
     
-    // Time in minutes the user has to pay.
-    // Time left = (createdAt + dueBy) - Date.now() / 1000
-    dueBy: number;
+    // Datetime the user has to pay.
+    dueBy: Date;
 
     status?: PaymentStatus;