Add getConnectError helper

lib/errorHelpers.ts

@@ -0,0 +1,26 @@
+const getConnectError = (error: unknown): string => {
+  const rawErrorMsg =
+    error instanceof Error ? error.message.toLowerCase() : String(error).toLowerCase();
+
+  // Keplr
+  if (rawErrorMsg.includes("window.keplr is undefined")) {
+    return "Keplr needs to be installed";
+  }
+
+  // Ledger
+  if (rawErrorMsg.includes("navigator.usb is undefined")) {
+    return "Your browser is not compatible with ledger";
+  }
+
+  if (rawErrorMsg.includes("no device selected")) {
+    return "A ledger device needs to be selected";
+  }
+
+  if (rawErrorMsg.includes("open the cosmos ledger app")) {
+    return "The Cosmos Ledger app needs to be open";
+  }
+
+  return "Error when connecting to wallet";
+};
+
+export { getConnectError };