Start on discount code impl, keep it single and hardcoded and simple at first

src/components/bitcoinConnect/CoursePaymentButton.js

@@ -10,12 +10,15 @@ import axios from 'axios';
 import GenericButton from '@/components/buttons/GenericButton';
 import { useRouter } from 'next/router';
 import useWindowWidth from '@/hooks/useWindowWidth';
+import { InputText } from 'primereact/inputtext';
 
 const Payment = dynamic(
     () => import('@getalby/bitcoin-connect-react').then((mod) => mod.Payment),
     { ssr: false }
 );
 
+const DISCOUNT_CODE = process.env.NEXT_PUBLIC_DISCOUNT_CODE;
+
 const CoursePaymentButton = ({ lnAddress, amount, onSuccess, onError, courseId }) => {
     const [invoice, setInvoice] = useState(null);
     const [isLoading, setIsLoading] = useState(false);
@@ -25,6 +28,9 @@ const CoursePaymentButton = ({ lnAddress, amount, onSuccess, onError, courseId }
     const router = useRouter();
     const windowWidth = useWindowWidth();
     const isMobile = windowWidth < 768;
+    const [discountCode, setDiscountCode] = useState('');
+    const [discountApplied, setDiscountApplied] = useState(false);
+    const [showDiscountInput, setShowDiscountInput] = useState(false);
 
     useEffect(() => {
         let intervalId;
@@ -49,12 +55,21 @@ const CoursePaymentButton = ({ lnAddress, amount, onSuccess, onError, courseId }
         };
     }, [invoice]);
 
+    const calculateDiscount = (originalAmount) => {
+        if (discountCode === DISCOUNT_CODE) {
+            const discountedAmount = 21000;
+            const savedPercentage = Math.round(((originalAmount - discountedAmount) / originalAmount) * 100);
+            return { discountedAmount, savedPercentage };
+        }
+        return { discountedAmount: originalAmount, savedPercentage: 0 };
+    };
+
     const fetchInvoice = async () => {
         setIsLoading(true);
         try {
             const ln = new LightningAddress(lnAddress);
             await ln.fetch();
-            const invoice = await ln.requestInvoice({ satoshi: amount });
+            const invoice = await ln.requestInvoice({ satoshi: discountApplied ? calculateDiscount(amount).discountedAmount : amount });
             setInvoice(invoice);
             setDialogVisible(true);
         } catch (error) {
@@ -70,7 +85,7 @@ const CoursePaymentButton = ({ lnAddress, amount, onSuccess, onError, courseId }
             const purchaseData = {
                 userId: session.user.id,
                 courseId: courseId,
-                amountPaid: parseInt(amount, 10)
+                amountPaid: discountApplied ? calculateDiscount(amount).discountedAmount : parseInt(amount, 10)
             };
 
             const result = await axios.post('/api/purchase/course', purchaseData);
@@ -90,9 +105,56 @@ const CoursePaymentButton = ({ lnAddress, amount, onSuccess, onError, courseId }
     };
 
     return (
-        <>
+        <div className="flex flex-col gap-2">
+            {!showDiscountInput ? (
+                <button 
+                    onClick={() => setShowDiscountInput(true)}
+                    className="text-sm text-blue-500 hover:text-blue-700 underline self-start flex items-center gap-1"
+                >
+                    <i className="pi pi-tag text-xs"></i>
+                    Have a discount code?
+                </button>
+            ) : (
+                <div className="flex flex-col gap-2 w-full">
+                    <div className="flex gap-2 items-center">
+                        <div className="relative flex-1">
+                            <InputText 
+                                value={discountCode}
+                                onChange={(e) => {
+                                    setDiscountCode(e.target.value);
+                                    setDiscountApplied(e.target.value === DISCOUNT_CODE);
+                                }}
+                                placeholder="Enter discount code"
+                                className="text-sm w-full p-2"
+                            />
+                            <button 
+                                onClick={() => {
+                                    setShowDiscountInput(false);
+                                    setDiscountCode('');
+                                    setDiscountApplied(false);
+                                }}
+                                className="absolute right-2 top-1/2 transform -translate-y-1/2 text-gray-400 hover:text-gray-600"
+                            >
+                                <i className="pi pi-times text-xs"></i>
+                            </button>
+                        </div>
+                        {discountApplied && (
+                            <span className="text-green-500 text-sm whitespace-nowrap flex items-center gap-1">
+                                <i className="pi pi-check-circle"></i>
+                                {calculateDiscount(amount).savedPercentage}% off!
+                            </span>
+                        )}
+                    </div>
+                    {discountApplied && (
+                        <div className="text-xs text-gray-500 flex items-center gap-1">
+                            <span className="line-through">{amount} sats</span>
+                            <span className="text-green-500 font-semibold">→ {calculateDiscount(amount).discountedAmount} sats</span>
+                        </div>
+                    )}
+                </div>
+            )}
             <GenericButton
-                label={`${amount} sats`}
+                label={`${discountApplied ? calculateDiscount(amount).discountedAmount : amount} sats`}
                 icon="pi pi-wallet"
                 onClick={() => {
                     if (status === 'unauthenticated') {
@@ -133,7 +195,7 @@ const CoursePaymentButton = ({ lnAddress, amount, onSuccess, onError, courseId }
                     <p>Loading payment details...</p>
                 )}
             </Dialog>
-        </>
+        </div>
     );
 };
 

src/components/content/courses/CourseDetails.js

@@ -91,7 +91,7 @@ export default function CourseDetails({ processedEvent, paidCourse, lessons, dec
         }
 
         if (paidCourse && decryptionPerformed && author && processedEvent?.pubkey !== session?.user?.pubkey && !session?.user?.role?.subscribed) {
-            return <GenericButton icon="pi pi-check" label={`Paid ${processedEvent.price} sats`} severity="success" outlined size="small" className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
+            return <GenericButton icon="pi pi-check" label={`Paid`} severity="success" outlined size="small" tooltip={`You paid ${processedEvent.price} sats to access this course (or potentially less if a discount was applied)`} tooltipOptions={{ position: 'top' }} className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
         }
 
         if (paidCourse && author && processedEvent?.pubkey === session?.user?.pubkey) {

src/components/content/documents/DocumentDetails.js

@@ -77,11 +77,11 @@ const DocumentDetails = ({ processedEvent, topics, title, summary, image, price,
 
         // if the user paid for the course that this lesson is in, show a message that says you have this lesson through the course and show how much you paid for the course
         if (isLesson && course && session?.user?.purchased?.some(purchase => purchase.courseId === course)) {
-            return <GenericButton tooltipOptions={{ position: 'top' }} tooltip={`You have this lesson through purchasing the course it belongs to. You paid ${session?.user?.purchased?.find(purchase => purchase.courseId === course)?.course?.price} sats for the course.`} icon="pi pi-check" label={`Paid ${session?.user?.purchased?.find(purchase => purchase.courseId === course)?.course?.price} sats`} severity="success" outlined size="small" className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
+            return <GenericButton tooltipOptions={{ position: 'top' }} tooltip={`You have this lesson through purchasing the course it belongs to. You paid ${session?.user?.purchased?.find(purchase => purchase.courseId === course)?.course?.price} sats for the course.`} icon="pi pi-check" label={`Paid`} severity="success" outlined size="small" className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
         }
 
         if (paidResource && decryptedContent && author && processedEvent?.pubkey !== session?.user?.pubkey && !session?.user?.role?.subscribed) {
-            return <GenericButton icon="pi pi-check" label={`Paid ${processedEvent.price} sats`} severity="success" outlined size="small" className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
+            return <GenericButton icon="pi pi-check" label={`Paid`} severity="success" outlined size="small" tooltip={`You paid ${processedEvent.price} sats to access this content (or potentially less if a discount was applied)`} tooltipOptions={{ position: 'top' }} className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
         }
 
         if (paidResource && author && processedEvent?.pubkey === session?.user?.pubkey) {

src/config/appConfig.js

@@ -11,7 +11,7 @@ const appConfig = {
       "wss://purplerelay.com/",
       "wss://relay.devs.tools/"
     ],
-    authorPubkeys: ["f33c8a9617cb15f705fc70cd461cfd6eaf22f9e24c33eabad981648e5ec6f741", "c67cd3e1a83daa56cff16f635db2fdb9ed9619300298d4701a58e68e84098345"],
+    authorPubkeys: ["f33c8a9617cb15f705fc70cd461cfd6eaf22f9e24c33eabad981648e5ec6f741", "c67cd3e1a83daa56cff16f635db2fdb9ed9619300298d4701a58e68e84098345", "468f729dd409053dac5e7470622c3996aad88db6ed1de9165cb1921b5ab4fd5e"],
     customLightningAddresses: [
       {
         // todo remove need for lowercase