feat: add retry UI for failed transactions

src/components/common/CreatorCard.tsx

@@ -1,10 +1,12 @@
+import { useRef, useState } from 'react';
 import { useAccount } from 'wagmi';
 import { Button } from '@/components/ui/button';
 import type { Course } from '@/services/course.service';
 import { cn } from '@/lib/utils';
 import { ShoppingCart, Wallet, Link as LinkIcon } from 'lucide-react';
 import toast from 'react-hot-toast';
 import showToast from '@/utils/toast.util';
+import TransactionRetryNotice from '@/components/common/TransactionRetryNotice';
 
 interface CreatorCardProps {
 	creator: Course;
@@ -13,6 +15,32 @@ interface CreatorCardProps {
 
 const CreatorCard: React.FC<CreatorCardProps> = ({ creator, className }) => {
 	const { isConnected } = useAccount();
+	const [transactionState, setTransactionState] = useState<
+		'idle' | 'submitting' | 'failed'
+	>('idle');
+	const hasFailedOnceRef = useRef(false);
+
+	const runPurchaseAttempt = () => {
+		setTransactionState('submitting');
+		showToast.loading(`Purchasing keys for ${creator.title}...`);
+
+		window.setTimeout(() => {
+			toast.remove();
+
+			if (!hasFailedOnceRef.current) {
+				hasFailedOnceRef.current = true;
+				setTransactionState('failed');
+				return;
+			}
+
+			hasFailedOnceRef.current = false;
+			setTransactionState('idle');
+			showToast.transactionSuccess(
+				'Purchase Successful!',
+				`You successfully bought a key for ${creator.title}`
+			);
+		}, 1500);
+	};
 
 	const handleBuy = () => {
 		if (!isConnected) {
@@ -23,14 +51,7 @@ const CreatorCard: React.FC<CreatorCardProps> = ({ creator, className }) => {
 			return;
 		}
 
-		showToast.loading(`Purchasing keys for ${creator.title}...`);
-		// Implementation for contract interaction would go here
-		setTimeout(() => {
-			showToast.transactionSuccess(
-				'Purchase Successful!',
-				`You successfully bought a key for ${creator.title}`
-			);
-		}, 1500);
+		runPurchaseAttempt();
 	};
 
 	return (
@@ -82,14 +103,15 @@ const CreatorCard: React.FC<CreatorCardProps> = ({ creator, className }) => {
 					onClick={handleBuy}
 					variant={isConnected ? 'default' : 'outline'}
 					size="sm"
+					disabled={transactionState === 'submitting'}
 					className={cn(
 						'rounded-xl font-bold',
 						!isConnected &&
 							'border-white/10 text-white/60 hover:bg-white/5'
 					)}
 				>
 					<ShoppingCart className="mr-2 size-4" />
-					Buy Key
+					{transactionState === 'submitting' ? 'Processing...' : 'Buy Key'}
 				</Button>
 			</div>
 
@@ -99,6 +121,15 @@ const CreatorCard: React.FC<CreatorCardProps> = ({ creator, className }) => {
 					Wallet Required
 				</div>
 			)}
+
+			{transactionState === 'failed' && (
+				<TransactionRetryNotice
+					className="mt-4"
+					message="The previous purchase attempt failed before confirmation. Retry the Stellar action to try again."
+					retryLabel="Retry Purchase"
+					onRetry={runPurchaseAttempt}
+				/>
+			)}
 		</div>
 	);
 };

src/components/common/TransactionRetryNotice.tsx

@@ -0,0 +1,57 @@
+import { AlertTriangle, RotateCcw } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { cn } from '@/lib/utils';
+
+interface TransactionRetryNoticeProps {
+	message: string;
+	onRetry: () => void;
+	title?: string;
+	retryLabel?: string;
+	className?: string;
+	disabled?: boolean;
+}
+
+const TransactionRetryNotice: React.FC<TransactionRetryNoticeProps> = ({
+	title = 'Transaction failed',
+	message,
+	onRetry,
+	retryLabel = 'Retry',
+	className,
+	disabled = false,
+}) => {
+	return (
+		<div
+			role="status"
+			aria-live="polite"
+			className={cn(
+				'rounded-2xl border border-red-500/20 bg-red-500/10 p-4 text-left',
+				className
+			)}
+		>
+			<div className="flex items-start gap-3">
+				<div className="mt-0.5 rounded-full bg-red-500/15 p-2 text-red-300">
+					<AlertTriangle className="size-4" />
+				</div>
+				<div className="min-w-0 flex-1">
+					<p className="font-jakarta text-sm font-bold text-white">{title}</p>
+					<p className="mt-1 font-jakarta text-sm leading-relaxed text-white/70">
+						{message}
+					</p>
+					<Button
+						type="button"
+						size="sm"
+						variant="outline"
+						onClick={onRetry}
+						disabled={disabled}
+						className="mt-3 border-red-400/30 bg-transparent text-white hover:bg-red-500/10"
+					>
+						<RotateCcw className="size-4" />
+						{retryLabel}
+					</Button>
+				</div>
+			</div>
+		</div>
+	);
+};
+
+export default TransactionRetryNotice;