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add token example playground
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‎sdk-examples/categories/token/.gitignore‎

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# Logs
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logs
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*.log
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*
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pnpm-debug.log*
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lerna-debug.log*
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# Runtime data
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*.pid
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*.seed
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*.pid.lock
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coverage
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*.lcov
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# nyc test coverage
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bower_components
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# Optional REPL history
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*.tgz
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# dotenv environment variables file
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# parcel-bundler cache (https://parceljs.org/)
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‎sdk-examples/categories/token/.prettierignore‎

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‎sdk-examples/categories/token/.prettierrc‎

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‎sdk-examples/categories/token/README.md‎

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# Token Example
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This example demonstrates how to use the `@crypto.com/developer-platform-client` Token module to interact with blockchain tokens.
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## Table of Contents
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- [Installation](#installation)
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- [Environment Variables](#environment-variables)
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- [Features](#features)
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- [Usage](#usage)
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- [Build](#build)
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- [Development](#development)
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- [License](#license)
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## Installation
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Navigate to the app folder and install dependencies:
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```sh
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cd developer-platform-sdk-examples/sdk-examples/categories/token
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npm install
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```
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## Environment Variables
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This example uses a client-side SDK and may require an API key. You can initialize the SDK inside your app code like so:
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```ts
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import { Client } from "@crypto.com/developer-platform-client";
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Client.init({
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apiKey: "sk-proj-...",
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});
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```
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> **Note:** Never expose real or production API keys in a public or client-side app.
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## Features
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## Features
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This example showcases the following **Token module** functions:
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- **getNativeTokenBalance**: Retrieve the native token balance for a given wallet address (supports `.cro` addresses)
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- **getERC20TokenBalance**: Retrieve the ERC20 token balance for a wallet and contract address
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- **getERC721TokenBalance**: Retrieve the ERC721 token balance for a wallet and contract address
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- **getTokenOwner**: Get the owner of a specific ERC721 token ID
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- **getTokenUri**: Get the token URI for a specific ERC721 token ID
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- **getERC20Metadata**: Fetch metadata (name, symbol, decimals) for an ERC20 token
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- **getERC721Metadata**: Fetch metadata for an ERC721 token contract
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- **transferToken**: Initiate a native or ERC20 token transfer transaction
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- **wrapToken**: Wrap native tokens into wrapped tokens
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- **swapToken**: Swap tokens between ERC20 contracts
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## Usage
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To run the app in development mode:
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```sh
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npm run dev
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```
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Open your browser and navigate to the provided local URL (typically `http://localhost:5173`).
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The application provides a user interface to test Token module functions. You can:
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- Enter a wallet address to fetch native, ERC20, or ERC721 token balances
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- View token metadata (name, symbol, decimals) for ERC20 and ERC721 contracts
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- Initiate token transfers, swaps, and wraps
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- Fetch ERC721 token owner and token URI information
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- View formatted JSON responses with token data
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## Build
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To generate a production-ready build:
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```sh
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npm run build
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```
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To preview the build:
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```sh
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npm run preview
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```
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## Development
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- `npm run dev` - Start development server
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- `npm run build` - Build for production
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- `npm run lint` - Run ESLint
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- `npm run preview` - Preview production build
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## API Key Requirements
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Some functions may require valid API credentials. Make sure to provide valid credentials when testing blockchain transaction features.
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## License
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This project is licensed under the MIT License. See the LICENSE file for details.

‎sdk-examples/categories/token/eslint.config.js‎

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import js from '@eslint/js'
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import reactHooks from 'eslint-plugin-react-hooks'
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import reactRefresh from 'eslint-plugin-react-refresh'
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import globals from 'globals'
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import tseslint from 'typescript-eslint'
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export default tseslint.config(
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{ ignores: ['dist'] },
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{
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extends: [js.configs.recommended, ...tseslint.configs.recommended],
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files: ['**/*.{ts,tsx}'],
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languageOptions: {
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ecmaVersion: 2020,
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globals: globals.browser,
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},
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plugins: {
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'react-hooks': reactHooks,
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'react-refresh': reactRefresh,
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},
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rules: {
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...reactHooks.configs.recommended.rules,
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'react-refresh/only-export-components': [
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'warn',
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{ allowConstantExport: true },
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],
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},
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},
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)

‎sdk-examples/categories/token/index.html‎

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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<link rel="icon" type="image/svg+xml" href="/favicon.svg" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>SDK Token Example</title>
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</head>
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<body>
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<div id="root"></div>
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<script type="module" src="/src/main.tsx"></script>
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</body>
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</html>

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