Buffer error and ui

packages/snap/package.json

@@ -54,6 +54,7 @@
     "@metamask/snaps-ui": "^3.1.0",
     "buffer": "^6.0.3",
     "cosmjs-types": "^0.8.0",
+    "lodash": "^4.17.21",
     "osmojs": "^16.5.1",
     "ses": "^0.18.4"
   },

packages/snap/snap.config.ts

@@ -9,6 +9,9 @@ const config: SnapConfig = {
   stats: {
     buffer: false,
   },
+  environment: {
+    DENO_SERVERLESS_URL: process.env.DENO_SERVERLESS_URL,
+  },
 };
 
 export default config;

packages/snap/snap.manifest.json

@@ -4,10 +4,10 @@
   "proposedName": "Cosmos Extension",
   "repository": {
     "type": "git",
-    "url": "https://github.com/cosmos/snap.git"
+    "url": "git+https://github.com/cosmos/snap.git"
   },
   "source": {
-    "shasum": "70Y16tDS8kL5RMQhR1coQlID5bwKy0TeCmYgqwTIWlk=",
+    "shasum": "f6e8RsKUURq4joa44SVbSIIwH8SdkhwOiulSa1bWqpA=",
     "location": {
       "npm": {
         "filePath": "dist/bundle.js",
@@ -89,7 +89,8 @@
     "endowment:rpc": {
       "snaps": false,
       "dapps": true
-    }
+    },
+    "endowment:page-home": {}
   },
   "manifestVersion": "0.1"
 }

packages/snap/src/index.ts

@@ -1,4 +1,4 @@
-import { OnRpcRequestHandler } from "@metamask/snaps-sdk";
+import { OnHomePageHandler, OnRpcRequestHandler, address, image, row } from "@metamask/snaps-sdk";
 import { AccountData } from '@cosmjs/amino';
 import { panel, text, heading, divider, copyable } from "@metamask/snaps-ui";
 import { initializeChains } from "./initialize";
@@ -14,6 +14,8 @@ import Long from "long";
 import { Key } from '@keplr-wallet/types';
 import { fromBech32 } from '@cosmjs/encoding';
 import { isTxBodyEncodeObject } from "@cosmjs/proto-signing";
+import { getBalances } from "./utils";
+import _ from "lodash";
 
 /**
  * Handle incoming JSON-RPC requests, sent through `wallet_invokeSnap`.
@@ -957,3 +959,40 @@ export const onRpcRequest: OnRpcRequestHandler = async ({
       throw new Error("Method not found.");
   }
 };
+
+export const onHomePage: OnHomePageHandler = async () => {
+  const main: any[] = [
+    heading('Metamask Extension'),
+    text('Manage everything across the Cosmos!'),
+    divider(),
+    heading('Accounts'),
+    divider(),
+  ]
+  const addressesP = ChainState.getChainAddresses();
+  const chainsP = ChainState.getChains();
+  const [addresses, chainsInWallet] = await Promise.all([addressesP, chainsP]);
+  const chains = _.values(_.merge(_.keyBy(addresses, 'chain_id'), _.keyBy(chainsInWallet.chains, 'chain_id')))
+  const balances = await getBalances(chains);
+  addresses.forEach((address) => {
+    const chain = balances.find((balance) => balance.chain_id === address.chain_id);
+    if (!chain) {
+      throw new Error(`No chain found for ${address.chain_id}`);
+    }
+    main.push(heading(chain ? chain.pretty_name : address.chain_id))
+    main.push(text("**Balances**"))
+    chain.balances.forEach((balance) => {
+      main.push(copyable(`${_.round((Number(balance.amount) / 1_000_000), 2)} ${balance.display}`))
+    })
+    main.push(text("**Address**"))
+    main.push(copyable(address.address))
+    main.push(divider())
+  })
+
+  // Direct them to the dashboard for more advanced things
+  main.push(
+    text('[Manage My Assets](https://metamask.mysticlabs.xyz/)')
+  );
+  return {
+    content: panel(main),
+  };
+};

packages/snap/src/utils.ts

@@ -0,0 +1,38 @@
+import { Coin } from "@cosmjs/amino";
+import { Chain } from "./types/chains";
+
+if (!process.env.DENO_SERVERLESS_URL) {
+  throw new Error("DENO_SERVERLESS_URL not set...");
+}
+export const denoUrl = process.env.DENO_SERVERLESS_URL;
+
+export interface CoinIBC extends Coin {
+  ibc: boolean;
+  ibc_denom?: string;
+  display: string;
+}
+
+export interface ChainBalances extends Chain {
+    balances: CoinIBC[];
+}
+
+export const getBalances = async (chains: Chain[]): Promise<ChainBalances[]> => {
+    try {
+        const res = await fetch(`${denoUrl}/balances`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json', 'Cache-Control': 'no-cache' },
+            body: JSON.stringify({ chains: chains })
+        });
+
+        if (!res.ok) {
+            throw new Error(`HTTP error ${res.status}`);
+        }
+
+        const data = await res.json();
+
+        return data.balances;
+    } catch (error) {
+        console.error(error);
+        throw error;
+    }
+};

packages/snap/src/wallet.ts

@@ -1,6 +1,7 @@
 import { DirectSecp256k1Wallet } from "@cosmjs/proto-signing";
 import { Secp256k1Wallet } from "@cosmjs/amino";
 import { Chain } from "./types/chains";
+import { Buffer } from "buffer";
 
 export const getWallet = async (chain: Chain) => {
     // get signer info

yarn.lock

@@ -2280,6 +2280,7 @@ __metadata:
     eslint-plugin-node: ^11.1.0
     eslint-plugin-prettier: ^4.2.1
     jest: ^29.7.0
+    lodash: ^4.17.21
     node-fetch: 2
     osmojs: ^16.5.1
     prettier: ^2.2.1