chore: Browser file management

examples/browser-file-management/.env.simple

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+NEXT_PUBLIC_GRPC_URL=https://gnfd-testnet-fullnode-tendermint-ap.bnbchain.org
+
+NEXT_PUBLIC_GREENFIELD_RPC_URL=https://gnfd-testnet-fullnode-tendermint-ap.bnbchain.org
+NEXT_PUBLIC_GREEN_CHAIN_ID=5600
+
+# BSC End POINT
+NEXT_PUBLIC_BSC_RPC_URL=https://data-seed-prebsc-1-s1.binance.org:8545
+NEXT_PUBLIC_BSC_CHAIN_ID=97

examples/browser-file-management/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

examples/browser-file-management/README.md

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+# Browser File Management
+
+```bash
+> cp .env.simple .env
+```
+
+And then fill your account info in `.env`.

examples/browser-file-management/next.config.js

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+const _getPublicEnv = (prefix) => {
+  const envs = process.env;
+  const res = {};
+
+  Object.keys(envs).forEach((k) => {
+    if (k.startsWith(prefix)) {
+      res[k] = envs[k];
+    }
+  });
+
+  return res;
+};
+
+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  reactStrictMode: false,
+  trailingSlash: true,
+  publicRuntimeConfig: {
+    ..._getPublicEnv('NEXT_PUBLIC_'),
+  },
+  eslint: {
+    // Warning: This allows production builds to successfully complete even if
+    // your project has ESLint errors.
+    ignoreDuringBuilds: true,
+  },
+  webpack: (config) => {
+    config.resolve.fallback = {
+      fs: false,
+      net: false,
+      tls: false,
+    };
+
+    return config;
+  },
+};
+
+module.exports = nextConfig;

examples/browser-file-management/package.json

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+{
+  "name": "browser-file-management",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@bnb-chain/greenfield-js-sdk": "latest",
+    "@bnb-chain/reed-solomon": "latest",
+    "@rainbow-me/rainbowkit": "^1.3.0",
+    "@types/node": "20.6.0",
+    "@types/react": "18.2.21",
+    "@types/react-dom": "18.2.7",
+    "next": "13.4.19",
+    "react": "18.2.0",
+    "react-dom": "18.2.0",
+    "typescript": "5.2.2",
+    "viem": "^1.19.11",
+    "wagmi": "^1.4.8"
+  }
+}

examples/browser-file-management/src/client/index.ts

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+import { GREEN_CHAIN_ID, GRPC_URL } from '@/config/env';
+import { Client } from '@bnb-chain/greenfield-js-sdk';
+
+export const client = Client.create(GRPC_URL, String(GREEN_CHAIN_ID), {
+  zkCryptoUrl: 'https://unpkg.com/@bnb-chain/[email protected]/dist/node/zk-crypto.wasm',
+});
+
+export const getSps = async () => {
+  const sps = await client.sp.getStorageProviders();
+  const finalSps = (sps ?? []).filter((v: any) => v.endpoint.includes('nodereal'));
+
+  return finalSps;
+};
+
+export const getAllSps = async () => {
+  const sps = await getSps();
+
+  return sps.map((sp) => {
+    return {
+      address: sp.operatorAddress,
+      endpoint: sp.endpoint,
+      name: sp.description?.moniker,
+    };
+  });
+};
+
+export const selectSp = async () => {
+  const finalSps = await getSps();
+
+  const selectIndex = Math.floor(Math.random() * finalSps.length);
+
+  const secondarySpAddresses = [
+    ...finalSps.slice(0, selectIndex),
+    ...finalSps.slice(selectIndex + 1),
+  ].map((item) => item.operatorAddress);
+  const selectSpInfo = {
+    id: finalSps[selectIndex].id,
+    endpoint: finalSps[selectIndex].endpoint,
+    primarySpAddress: finalSps[selectIndex]?.operatorAddress,
+    sealAddress: finalSps[selectIndex].sealAddress,
+    secondarySpAddresses,
+  };
+
+  return selectSpInfo;
+};