fix: add simple file-based browser-like storage

create-wallet.js

@@ -1,14 +1,24 @@
+"use strict";
+
 // See https://dashplatform.readme.io/docs/tutorial-create-and-fund-a-wallet
-const Dash = require('dash');
+const Dash = require("dash");
+
+const DomStorage = require("dom-storage");
+const myLocalStorage = new DomStorage("./db.json", { strict: true, ws: "  " });
+const JsonStorage = require("json-storage").JsonStorage;
+const store = JsonStorage.create(myLocalStorage, "dash", { stringify: true });
+store.getItem = store.get;
+store.setItem = store.set;
 
 const clientOpts = {
-  network: 'testnet',
+  network: "testnet",
   wallet: {
+    adapter: store,
     mnemonic: null, // this indicates that we want a new wallet to be generated
-                    // if you want to get a new address for an existing wallet
-                    // replace 'null' with an existing wallet mnemonic
-    offlineMode: true,  // this indicates we don't want to sync the chain
-                        // it can only be used when the mnemonic is set to 'null'
+    // if you want to get a new address for an existing wallet
+    // replace 'null' with an existing wallet mnemonic
+    offlineMode: true, // this indicates we don't want to sync the chain
+    // it can only be used when the mnemonic is set to 'null'
   },
 };
 
@@ -19,16 +29,16 @@ const createWallet = async () => {
 
   const mnemonic = client.wallet.exportWallet();
   const address = account.getUnusedAddress();
-  console.log('Mnemonic:', mnemonic);
-  console.log('Unused address:', address.address);
+  console.log("Mnemonic:", mnemonic);
+  console.log("Unused address:", address.address);
 };
 
 createWallet()
-  .catch((e) => console.error('Something went wrong:\n', e))
+  .catch((e) => console.error("Something went wrong:\n", e))
   .finally(() => client.disconnect());
 
 // Handle wallet async errors
-client.on('error', (error, context) => {
+client.on("error", (error, context) => {
   console.error(`Client error: ${error.name}`);
   console.error(context);
-});
+});

package.json

@@ -17,7 +17,9 @@
   },
   "homepage": "https://github.com/dashevo/platform-readme-tutorials#readme",
   "dependencies": {
-    "dash": "^3.22.7"
+    "dash": "^3.22.7",
+    "dom-storage": "^2.1.0",
+    "json-storage": "^2.1.2"
   },
   "devDependencies": {
     "dotenv": "^16.0.0",