fix: restrict Miden bridge to priced assets

src/components/crosschain/IntentForm.tsx

@@ -11,7 +11,10 @@ import {
   DEFAULT_TESTNET_CHAIN_ID_STR,
   isSupportedTestnetEvmChain,
 } from "../../constants/chains";
-import { getMidenFaucetDecimals } from "../../constants/miden-tokens";
+import {
+  getMidenFaucetDecimals,
+  isPragmaSupportedMidenAsset,
+} from "../../constants/miden-tokens";
 import { EPOCH_TESTNET_TOKENS } from "../../constants/evm-tokens";
 import { midenscanNoteUrl } from "../../lib/explorers";
 import {
@@ -62,13 +65,18 @@ export function IntentForm({
   const { address } = useAccount();
   const walletChainId = useChainId();
 
+  const supportedMidenAssets = midenAssets.filter((asset) =>
+    isPragmaSupportedMidenAsset(asset, network),
+  );
+  const unsupportedAssetCount =
+    midenAssets.length - supportedMidenAssets.length;
   const [selectedAssetId, setSelectedAssetId] = useState("");
-  const selectedAssetIdIsAvailable = midenAssets.some(
+  const selectedAssetIdIsAvailable = supportedMidenAssets.some(
     (asset) => asset.assetId === selectedAssetId,
   );
   const resolvedSelectedAssetId = selectedAssetIdIsAvailable
     ? selectedAssetId
-    : (midenAssets[0]?.assetId ?? "");
+    : (supportedMidenAssets[0]?.assetId ?? "");
 
   // Follows the connected wallet until the user overrides a field. Not
   // useState defaults: the wallet connects after this mounts.
@@ -106,13 +114,12 @@ export function IntentForm({
     destination.evmAddress.trim(),
   );
 
-  const selectedAsset = midenAssets.find(
+  const selectedAsset = supportedMidenAssets.find(
     (a) => a.assetId.toLowerCase() === resolvedSelectedAssetId.toLowerCase(),
   );
   // Use the hardcoded faucet→decimals map only for display formatting. Do not
   // fall back to the wallet adapter's reported decimals (often defaults to 8
-  // and silently mis-scales). Unknown faucets remain selectable and display
-  // their quoted amount in raw units.
+  // and silently mis-scales).
   const midenFaucetDecimals = resolvedSelectedAssetId
     ? getMidenFaucetDecimals(resolvedSelectedAssetId, network)
     : undefined;
@@ -231,10 +238,11 @@ export function IntentForm({
 
       <div className="mt-4 space-y-4">
         <IntentSourceAssetField
-          assets={midenAssets ?? []}
+          assets={supportedMidenAssets}
           selectedAssetId={resolvedSelectedAssetId}
           selectedAsset={selectedAsset}
           isLoadingAssets={isLoadingMidenAssets}
+          unsupportedAssetCount={unsupportedAssetCount}
           onSelect={(assetId) => {
             setSelectedAssetId(assetId);
             onClearQuote();

src/components/crosschain/intent/IntentSourceAssetField.tsx

@@ -13,6 +13,7 @@ interface Props {
   selectedAssetId: string;
   selectedAsset?: MidenAssetOption;
   isLoadingAssets: boolean;
+  unsupportedAssetCount: number;
   onSelect: (assetId: string) => void;
 }
 
@@ -21,6 +22,7 @@ export function IntentSourceAssetField({
   selectedAssetId,
   selectedAsset,
   isLoadingAssets,
+  unsupportedAssetCount,
   onSelect,
 }: Props) {
   return (
@@ -46,9 +48,23 @@ export function IntentSourceAssetField({
           {selectedAsset?.amount?.toString() ?? "—"}
         </span>
       </p>
-      {!isLoadingAssets && assets.length === 0 && (
+      {!isLoadingAssets &&
+        assets.length === 0 &&
+        unsupportedAssetCount === 0 && (
+          <p className="text-xs text-amber-800">
+            No Miden assets found in this wallet. Fund it before bridging.
+          </p>
+        )}
+      {!isLoadingAssets && assets.length === 0 && unsupportedAssetCount > 0 && (
         <p className="text-xs text-amber-800">
-          No Miden assets found in this wallet. Fund it before bridging.
+          No Pragma-priced assets found. This bridge supports USDC, USDT, DAI,
+          WETH, and WBTC.
+        </p>
+      )}
+      {!isLoadingAssets && assets.length > 0 && unsupportedAssetCount > 0 && (
+        <p className="text-xs text-neutral-500">
+          {unsupportedAssetCount} unsupported wallet
+          {unsupportedAssetCount === 1 ? " asset is" : " assets are"} hidden.
         </p>
       )}
     </div>

src/constants/miden-tokens.ts

@@ -1,6 +1,14 @@
 import { normalizeMidenIdToHex } from "../services/epoch-bridge";
 import type { MidenNetwork } from "../config/miden";
 
+const PRAGMA_SUPPORTED_MIDEN_SYMBOLS = new Set([
+  "USDC",
+  "USDT",
+  "DAI",
+  "WETH",
+  "WBTC",
+]);
+
 /**
  * Hardcoded Miden testnet faucet → decimals map.
  *
@@ -41,3 +49,16 @@ export function getMidenFaucetDecimals(
     return undefined;
   }
 }
+
+/** Returns whether the solver has a Pragma price feed for this wallet asset. */
+export function isPragmaSupportedMidenAsset(
+  asset: { assetId: string; symbol?: string },
+  network: MidenNetwork,
+): boolean {
+  const symbol = asset.symbol?.trim().toUpperCase();
+  if (symbol && PRAGMA_SUPPORTED_MIDEN_SYMBOLS.has(symbol)) return true;
+
+  // Metadata can arrive after the wallet asset list. Keep known testnet faucets
+  // available while their symbol is still loading.
+  return getMidenFaucetDecimals(asset.assetId, network) !== undefined;
+}