fix: do not allow max to go below 0

Author: limpbrains

src/screens/Wallets/LNURLPay/Amount.tsx

@@ -67,8 +67,9 @@ const Amount = ({
 
 	const max = useMemo(() => {
 		// TODO: get routing fee
-		const fee = 100;
-		return Math.min(spendingBalance - fee, maxSendable);
+		const fee = 10;
+		const min = Math.min(spendingBalance - fee, maxSendable);
+		return min < 0 ? 0 : min;
 	}, [maxSendable, spendingBalance]);
 
 	const maxSendableProps = {