add a password manager app demo

packages/nextjs/app/nillion-pw-manager/page.tsx

@@ -0,0 +1,241 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import type * as NillionTypes from "@nillion/nillion-client-js-browser/nillion_client_js_browser.d.ts";
+import type { NextPage } from "next";
+import { useAccount } from "wagmi";
+import { CopyString } from "~~/components/nillion/CopyString";
+import Dropdown from "~~/components/nillion/Dropdown";
+import { NillionOnboarding } from "~~/components/nillion/NillionOnboarding";
+import RetrieveSecretCommand from "~~/components/nillion/RetrieveSecretCommand";
+import SecretForm from "~~/components/nillion/SecretForm";
+import { Address } from "~~/components/scaffold-eth";
+import { getUserKeyFromSnap } from "~~/utils/nillion/getUserKeyFromSnap";
+import { retrieveSecretBlob } from "~~/utils/nillion/retrieveSecretBlob";
+import { storeSecretsBlob } from "~~/utils/nillion/storeSecretsBlob";
+
+interface StoredSecrets {
+  [secretName: string]: string; // store_id
+}
+const Home: NextPage = () => {
+  const { address: connectedAddress } = useAccount();
+  const [connectedToSnap, setConnectedToSnap] = useState<boolean>(false);
+  const [userKey, setUserKey] = useState<string | null>(null);
+  const [userId, setUserId] = useState<string | null>(null);
+  const [nillion, setNillion] = useState<any>(null);
+  const [nillionClient, setNillionClient] = useState<any>(null);
+  const [selectedSecretName, setSelectedSecretName] = useState<string>("");
+  const [selectedStoreId, setSelectedStoreId] = useState<string | null>(null);
+  const [latestSecretName, setLatestSecretName] = useState<string | null>(null);
+  const [storedSecrets, setStoredSecrets] = useState<StoredSecrets>({});
+  const [retrievedValue, setRetrievedValue] = useState<string | null>(null);
+
+  async function handleConnectToSnap() {
+    const snapResponse = await getUserKeyFromSnap();
+    setUserKey(snapResponse?.user_key || null);
+    setConnectedToSnap(snapResponse?.connectedToSnap || false);
+  }
+
+  useEffect(() => {
+    if (userKey) {
+      const getNillionClientLibrary = async () => {
+        const nillionClientUtil = await import("~~/utils/nillion/nillionClient");
+        const libraries = await nillionClientUtil.getNillionClient(userKey);
+        setNillion(libraries.nillion);
+        setNillionClient(libraries.nillionClient);
+        return libraries.nillionClient;
+      };
+
+      getNillionClientLibrary().then(nillionClient => {
+        const user_id = nillionClient.user_id;
+        setUserId(user_id);
+      });
+    }
+  }, [userKey]);
+
+  async function handleSecretFormSubmit(
+    secretName: string,
+    secretValue: string,
+    permissionedUserIdForRetrieveSecret: string | null,
+    permissionedUserIdForUpdateSecret: string | null,
+    permissionedUserIdForDeleteSecret: string | null,
+  ) {
+    await storeSecretsBlob(
+      nillion,
+      nillionClient,
+      [{ name: secretName, value: secretValue }],
+      permissionedUserIdForRetrieveSecret ? [permissionedUserIdForRetrieveSecret] : [],
+      permissionedUserIdForUpdateSecret ? [permissionedUserIdForUpdateSecret] : [],
+      permissionedUserIdForDeleteSecret ? [permissionedUserIdForDeleteSecret] : [],
+    ).then((store_id: string) => {
+      setStoredSecrets(prevSecrets => ({
+        ...prevSecrets,
+        [secretName]: store_id,
+      }));
+
+      setLatestSecretName(secretName);
+    });
+  }
+
+  async function handleRetrieveSecretBlob(store_id: string, secret_name: string) {
+    await retrieveSecretBlob(nillionClient, store_id, secret_name).then(setRetrievedValue);
+  }
+
+  const handleSecretDropdownSelection = (secretName: string) => {
+    setSelectedSecretName(secretName);
+    setSelectedStoreId(storedSecrets[secretName]);
+  };
+
+  const resetNillion = () => {
+    setConnectedToSnap(false);
+    setUserKey(null);
+    setUserId(null);
+    setNillion(null);
+    setNillionClient(null);
+  };
+
+  const resetForm = () => {
+    setLatestSecretName(null);
+    setRetrievedValue(null);
+  };
+
+  useEffect(() => {
+    if (!connectedAddress) {
+      resetNillion();
+    }
+  }, [connectedAddress]);
+
+  return (
+    <>
+      <div className="flex items-center flex-col pt-10">
+        <div className="px-5 flex flex-col">
+          <h1 className="text-xl">
+            <span className="block text-4xl font-bold text-center">Nillion Password Manager</span>
+
+            {!connectedAddress && <p>Connect your MetaMask Flask wallet</p>}
+            {connectedAddress && connectedToSnap && !userKey && (
+              <a target="_blank" href="https://nillion-snap-site.vercel.app/" rel="noopener noreferrer">
+                <button className="btn btn-sm btn-primary mt-4">
+                  No Nillion User Key - Generate and store user key here
+                </button>
+              </a>
+            )}
+          </h1>
+
+          {connectedAddress && (
+            <div className="flex justify-center items-center space-x-2">
+              <p className="my-2 font-medium">Connected Wallet Address:</p>
+              <Address address={connectedAddress} />
+            </div>
+          )}
+
+          {connectedAddress && !connectedToSnap && (
+            <button className="btn btn-sm btn-primary mt-4" onClick={handleConnectToSnap}>
+              Connect to Snap with your Nillion User Key
+            </button>
+          )}
+
+          {connectedToSnap && (
+            <div>
+              {userKey && (
+                <div>
+                  <div className="flex justify-center items-center space-x-2">
+                    <p className="my-2 font-medium">
+                      🤫 Nillion User Key from{" "}
+                      <a target="_blank" href="https://nillion-snap-site.vercel.app/" rel="noopener noreferrer">
+                        MetaMask Flask
+                      </a>
+                      :
+                    </p>
+
+                    <CopyString str={userKey} />
+                  </div>
+
+                  {userId && (
+                    <div className="flex justify-center items-center space-x-2">
+                      <p className="my-2 font-medium">Connected as Nillion User ID:</p>
+                      <CopyString str={userId} />
+                    </div>
+                  )}
+                </div>
+              )}
+            </div>
+          )}
+        </div>
+
+        <div className="flex-grow bg-base-300 w-full mt-16 px-8 py-12">
+          <div className="flex justify-center items-center gap-12 flex-col sm:flex-row">
+            {!connectedToSnap ? (
+              <NillionOnboarding />
+            ) : (
+              <div className="flex flex-row justify-between">
+                {/* Store secret blob */}
+                <div className="flex flex-col bg-base-100 px-10 py-10 text-center items-center w-full rounded-3xl my-2 justify-between mx-5">
+                  <h1 className="text-xl">Store a new password</h1>
+                  <div className="flex flex-row w-full justify-between items-center my-10 mx-10">
+                    <div className="flex-1 px-2">
+                      {latestSecretName ? (
+                        <>
+                          <RetrieveSecretCommand
+                            secretType="SecretBlob"
+                            userKey={userKey}
+                            storeId={storedSecrets[latestSecretName]}
+                            secretName={latestSecretName || ""}
+                          />
+                          <button className="btn btn-sm btn-primary mt-4" onClick={resetForm}>
+                            Add another password
+                          </button>
+                        </>
+                      ) : (
+                        <SecretForm
+                          secretName={""}
+                          onSubmit={handleSecretFormSubmit}
+                          secretType="text"
+                          isLoading={false}
+                          // use customSecretName boolean prop to signal that the form should set the secret name
+                          customSecretName
+                          hidePermissions
+                          itemName="password"
+                        />
+                      )}
+                    </div>
+                  </div>
+                </div>
+
+                {/* Retrieve secret blob */}
+
+                <div className="flex flex-col bg-base-100 px-10 py-10 text-center items-center w-full rounded-3xl my-2 justify-between mx-5">
+                  <h1 className="text-xl">Retrieve passwords from Nillion</h1>
+                  <div className="flex flex-row w-full justify-between items-center my-10 mx-10">
+                    <div className="flex-1 px-2 flex-col">
+                      <div>
+                        <Dropdown
+                          options={Object.keys(storedSecrets).map(s => ({ value: s, label: s }))}
+                          onDropdownUpdate={selectedName => handleSecretDropdownSelection(selectedName)}
+                          itemName="a password"
+                          disabled={Object.keys(storedSecrets).length === 0}
+                        />
+                      </div>
+
+                      <button
+                        className="btn btn-sm btn-primary mt-4"
+                        onClick={() => handleRetrieveSecretBlob(selectedStoreId || "", selectedSecretName)}
+                        disabled={!selectedStoreId}
+                      >
+                        Retrieve and decode {selectedSecretName}
+                      </button>
+
+                      {retrievedValue && <p>✅ Retrieved value: {retrievedValue}</p>}
+                    </div>
+                  </div>
+                </div>
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </>
+  );
+};
+
+export default Home;

packages/nextjs/app/page.tsx

@@ -38,6 +38,19 @@ const Home: NextPage = () => {
               packages/hardhat/contracts
             </code>
           </p>
+
+          <div className="flex flex-col bg-base-100 px-10 py-10 text-center items-center rounded-3xl">
+            <span className="block text-2xl font-bold pb-4">Nillion demo apps</span>
+            <Link href="/nillion-pw-manager" passHref className="link">
+              Nillion Password Manager
+            </Link>{" "}
+            <Link href="/nillion-hello-world-complete" passHref className="link">
+              Nillion Hello World
+            </Link>{" "}
+            <Link href="/nillion-compute" passHref className="link">
+              Nillion Blind Compute
+            </Link>{" "}
+          </div>
         </div>
 
         <div className="flex-grow bg-base-300 w-full mt-16 px-8 py-12">

packages/nextjs/components/Header.tsx

@@ -20,15 +20,15 @@ export const menuLinks: HeaderMenuLink[] = [
     href: "/",
   },
   {
-    label: "🖥️ Nillion Blind Computation Demo",
+    label: "🖥️ Blind Computation",
     href: "/nillion-compute",
   },
   {
-    label: "🎯 Nillion Hello World",
+    label: "🎯 Hello World",
     href: "/nillion-hello-world",
   },
   {
-    label: "✅ Nillion Hello World Demo",
+    label: "✅ Hello World",
     href: "/nillion-hello-world-complete",
   },
   {

packages/nextjs/components/nillion/Dropdown.tsx

@@ -0,0 +1,36 @@
+import React, { useState } from "react";
+
+interface DropdownOption {
+  value: string;
+  label: string;
+}
+
+interface DropdownProps {
+  options: DropdownOption[];
+  onDropdownUpdate: (value: string) => void;
+  disabled?: boolean;
+  itemName?: string;
+}
+
+const Dropdown: React.FC<DropdownProps> = ({ options, onDropdownUpdate, itemName, disabled = false }) => {
+  const [selectedOption, setSelectedOption] = useState<string | null>(null);
+
+  const handleSelect = (e: React.ChangeEvent<HTMLSelectElement>) => {
+    const selectedValue = e.target.value;
+    setSelectedOption(selectedValue);
+    onDropdownUpdate(selectedValue);
+  };
+
+  return (
+    <select value={selectedOption || ""} onChange={e => handleSelect(e)} disabled={disabled}>
+      <option value="">Select {itemName} name</option>
+      {options.map((option, index) => (
+        <option key={index} value={option.value}>
+          {option.label}
+        </option>
+      ))}
+    </select>
+  );
+};
+
+export default Dropdown;