automatic cctp: use MinAmountError (#703)

Author: kev1n-peters

connect/src/routes/cctp/automatic.ts

@@ -13,6 +13,7 @@ import { TransferState } from "../../types.js";
 import { Wormhole } from "../../wormhole.js";
 import type { StaticRouteMethods } from "../route.js";
 import { AutomaticRoute } from "../route.js";
+import { MinAmountError } from "../types.js";
 import type {
   Quote,
   QuoteResult,
@@ -163,9 +164,7 @@ export class AutomaticCCTPRoute<N extends Network>
 
     const minAmount = (fee * 105n) / 100n;
     if (amount.units(amt) < minAmount) {
-      throw new Error(
-        `Minimum amount is ${amount.display(request.amountFromBaseUnits(minAmount))}`,
-      );
+      throw new MinAmountError(amount.fromBaseUnits(minAmount, amt.decimals));
     }
 
     const redeemableAmount = amount.units(amt) - fee;