add signatures

src/components/Demo.tsx

@@ -1,6 +1,12 @@
 import { useEffect, useCallback, useState } from "react";
 import sdk, { type FrameContext } from "@farcaster/frame-sdk";
-import { useAccount, useSendTransaction } from "wagmi";
+import {
+  useAccount,
+  useSendTransaction,
+  useSignMessage,
+  useSignTypedData,
+  useWaitForTransactionReceipt,
+} from "wagmi";
 
 import { Button } from "~/components/ui/Button";
 import { truncateAddress } from "~/lib/truncateAddress";
@@ -9,9 +15,34 @@ export default function Demo() {
   const [isSDKLoaded, setIsSDKLoaded] = useState(false);
   const [context, setContext] = useState<FrameContext>();
   const [isContextOpen, setIsContextOpen] = useState(false);
+  const [txHash, setTxHash] = useState<string | null>(null);
 
   const { address, isConnected } = useAccount();
-  const { sendTransaction } = useSendTransaction();
+  const {
+    sendTransaction,
+    error: sendTxError,
+    isError: isSendTxError,
+    isPending: isSendTxPending,
+  } = useSendTransaction();
+
+  const {
+    signMessage,
+    error: signError,
+    isError: isSignError,
+    isPending: isSignPending,
+  } = useSignMessage();
+
+  const {
+    signTypedData,
+    error: signTypedError,
+    isError: isSignTypedError,
+    isPending: isSignTypedPending,
+  } = useSignTypedData();
+
+  const { isLoading: isConfirming, isSuccess: isConfirmed } =
+    useWaitForTransactionReceipt({
+      hash: txHash as `0x${string}`,
+    });
 
   useEffect(() => {
     const load = async () => {
@@ -33,16 +64,49 @@ export default function Demo() {
   }, []);
 
   const sendTx = useCallback(() => {
-    sendTransaction({
-      to: "0x4bBFD120d9f352A0BEd7a014bd67913a2007a878",
-      data: "0x9846cd9efc000023c0",
-    });
+    sendTransaction(
+      {
+        to: "0x4bBFD120d9f352A0BEd7a014bd67913a2007a878",
+        data: "0x9846cd9efc000023c0",
+      },
+      {
+        onSuccess: (hash) => {
+          setTxHash(hash);
+        },
+      }
+    );
   }, [sendTransaction]);
 
+  const sign = useCallback(() => {
+    signMessage({ message: "Hello from Frames v2!" });
+  }, [signMessage]);
+
+  const signTyped = useCallback(() => {
+    signTypedData({
+      domain: {
+        name: "Frames v2 Demo",
+        version: "1",
+        chainId: 8453,
+      },
+      types: {
+        Message: [{ name: "content", type: "string" }],
+      },
+      message: {
+        content: "Hello from Frames v2!",
+      },
+      primaryType: "Message",
+    });
+  }, [signTypedData]);
+
   const toggleContext = useCallback(() => {
     setIsContextOpen((prev) => !prev);
   }, []);
 
+  const renderError = (error: Error | null) => {
+    if (!error) return null;
+    return <div className="text-red-500 text-xs mt-1">{error.message}</div>;
+  };
+
   if (!isSDKLoaded) {
     return <div>Loading...</div>;
   }
@@ -110,9 +174,47 @@ export default function Demo() {
         {isConnected && (
           <>
             <div className="mb-4">
-              <Button onClick={sendTx} disabled={!isConnected}>
+              <Button
+                onClick={sendTx}
+                disabled={!isConnected || isSendTxPending}
+                isLoading={isSendTxPending}
+              >
                 Send Transaction
               </Button>
+              {isSendTxError && renderError(sendTxError)}
+              {txHash && (
+                <div className="mt-2 text-xs">
+                  <div>Hash: {truncateAddress(txHash)}</div>
+                  <div>
+                    Status:{" "}
+                    {isConfirming
+                      ? "Confirming..."
+                      : isConfirmed
+                      ? "Confirmed!"
+                      : "Pending"}
+                  </div>
+                </div>
+              )}
+            </div>
+            <div className="mb-4">
+              <Button
+                onClick={sign}
+                disabled={!isConnected || isSignPending}
+                isLoading={isSignPending}
+              >
+                Sign Message
+              </Button>
+              {isSignError && renderError(signError)}
+            </div>
+            <div className="mb-4">
+              <Button
+                onClick={signTyped}
+                disabled={!isConnected || isSignTypedPending}
+                isLoading={isSignTypedPending}
+              >
+                Sign Typed Data
+              </Button>
+              {isSignTypedError && renderError(signTypedError)}
             </div>
           </>
         )}

src/components/ui/Button.tsx

@@ -1,14 +1,21 @@
 interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
   children: React.ReactNode;
+  isLoading?: boolean;
 }
 
-export function Button({ children, className = "", ...props }: ButtonProps) {
+export function Button({ children, className = "", isLoading = false, ...props }: ButtonProps) {
   return (
     <button
       className={`w-full max-w-xs mx-auto block bg-[#7C65C1] text-white py-3 px-6 rounded-lg transition-colors disabled:opacity-50 disabled:cursor-not-allowed disabled:hover:bg-[#7C65C1] hover:bg-[#6952A3] ${className}`}
       {...props}
     >
-      {children}
+      {isLoading ? (
+        <div className="flex items-center justify-center">
+          <div className="animate-spin h-5 w-5 border-2 border-white border-t-transparent rounded-full" />
+        </div>
+      ) : (
+        children
+      )}
     </button>
   );
 }