Smart-contract-interaction NPM

smart-contract-interaction

A powerful SDK for interacting with smart contracts, supporting multiple index symbols and environments like wallet extensions and mainnets.

Installation

To install the package, run the following command:

npm i smart-contract-interaction

Usage

SDK Initialization

To begin, create a new instance of the NexIndex class with the index symbol and the current configuration object:

import { NexIndex, Environment } from 'smart-contract-interaction';

// Define the configuration for connecting to the smart contract
const CurrentConfig = {
  env: Environment.WALLET_EXTENSION, // Choose the environment (e.g., WALLET_EXTENSION, LOCAL, MAINNET)
  rpc: {
    local: '<your_local_url>',      // Add your local RPC URL here
    mainnet: '<your_rpc_url>',      // Add your mainnet RPC URL here
    wallet: window.ethereum         // If using a wallet extension like MetaMask, pass the wallet object
  },
  wallet: {
    address: '<your_address>',      // Your wallet address here
    privateKey: '<your_private_key>' // Your wallet's private key for write operations
  }
};

// Instantiate the NexIndex class with the chosen index symbol
const index = new NexIndex('ANFI', CurrentConfig);

Allowed Index Symbols

You can interact with any of the following index symbols:

ANFI
CRYPTO5
MAG7
ARBEI

Allowed From Mint Symbols

You can interact with any of the following index symbols:

USDT
USDC ( for MAG7 only )
Configuration Fields
env: Environment for smart contract interaction. Choose between:
- LOCAL
- MAINNET
- WALLET_EXTENSION
rpc: RPC URLs for different environments.
wallet: Contains wallet details (wallet address and private key).

Methods

Read Methods

getAddress()
- Returns the connected user's wallet address.
- Arguments: None
```
const address = await index.getAddress();
console.log(address);
```
getBalance()
- Returns the total balance of the selected index for the connected user.
- Arguments: None
```
const balance = await index.getBalance();
console.log(balance);
```
getAllowance()
- Returns the allowance of the selected index.
- Arguments: None
```
const allowance = await index.getAllowance();
console.log(allowance);
```
getTotalSupply()
- Returns the total supply of the selected index.
- Arguments: None
```
const totalSupply = await index.getTotalSupply();
console.log(totalSupply);
```
Write Methods
approve(fromSymbol, amount)
- Approve the transfer of a specified amount of tokens from a given symbol.
- Arguments:
  - fromSymbol: Symbol from which you want to approve the token.
  - amount: The amount of tokens to approve.
```
await index.approve('USDT', 100);
```
mint(fromSymbol, amount)
- Mint tokens for the specified index.
- Arguments:
  - fromSymbol: Symbol from which you want to mint the token.
  - amount: The amount of tokens to mint.
```
await index.mint('USDT', 50);
```

burn(amount)

Burn the specified amount of tokens.
Arguments:
- amount: The amount of tokens to burn.
```
await index.burn(25);
```

Example

// Import the necessary classes and environment enum
import { NexIndex, Environment } from 'smart-contract-interaction';

// Configuration for interacting with the smart contract
const CurrentConfig = {
  env: Environment.MAINNET,
  rpc: {
    local: 'http://localhost:8545',
    mainnet: 'https://mainnet.infura.io/v3/YOUR_INFURA_PROJECT_ID',
    wallet: window.ethereum
  },
  wallet: {
    address: '0xYourWalletAddress',
    privateKey: '0xYourPrivateKey'
  }
};

// Initialize the NexIndex instance with a chosen index symbol
const index = new NexIndex('MAG7', CurrentConfig);

// Get the connected user's address
const address = await index.getAddress();
console.log(`User address: ${address}`);

// Get the user's balance for the selected index
const balance = await index.getBalance();
console.log(`Balance: ${balance}`);

// Approve a token transfer
await index.approve('USDC', 100);

// Mint new tokens
await index.mint('USDC', 50);

// Burn tokens
await index.burn(20);

Widget Implementation

If the user wants to interact with our indices, they can do so via our provided widget.

Usage

To use the widget, integrate it into your front-end as shown below:

<Swap configs={configs} />

The configs object contains the necessary configuration for the swap widget to function correctly. An example configuration is as follows:

const configs: SwapPropsObjectType = {
  connectionConfig: CurrentConfig,   // Pass the connection config object
  mode: 'dark',                      // Set the theme to either 'dark' or 'light'
  onCompletion: handleSwapCallback,   // Callback function triggered after swap
  swapFromCurrSymbol: 'USDT',         // OPTIONAL: Currency symbol to swap from (default: USDT)
  swapToCurrSymbol: 'CRYPTO5',        // OPTIONAL: Index symbol to swap to (default: ANFI)
};

SwapPropsObjectType Definition

The widget requires a configuration object of type SwapPropsObjectType:

interface SwapPropsObjectType {
  connectionConfig: Config;                 // Configuration for connecting to the smart contract
  mode: modeType;                           // Choose between 'dark' or 'light' mode
  swapFromCurrSymbol?: allowedIndexSymbolProps | allowedMintSymbolProps  // Symbol for currency to swap from
  swapToCurrSymbol?: allowedIndexSymbolProps | allowedMintSymbolProps    // Symbol for index to swap to
  onCompletion: (data: SwapResult) => void; // Callback to handle swap completion
}

Types and Definitions

allowedMintSymbolProps

The allowed symbols for minting are:

type allowedMintSymbolProps = 'USDT' | 'USDC';

allowedIndexSymbolProps

The allowed index symbols for swapping are:

type allowedIndexSymbolProps = 'ANFI' | 'CRYPTO5' | 'MAG7' | 'ARBEI';

modeType

The widget can either be in dark or light mode:

type modeType = 'dark' | 'light';

SwapResult Interface

The SwapResult interface defines the structure of the callback data returned upon swap completion:

interface SwapResult {
  success: boolean;                  // Indicates if the swap was successful
  message: string;                   // Message describing the outcome of the swap
  error?: Error;                     // Optional error field if the swap fails
  receipt?: TransactionReceipt;      // Contains the transaction receipt in case of write functions
}

The onCompletion function will be invoked with the result of the swap, providing details such as whether the swap was successful, any errors, and the transaction receipt if available.

Example Widget Integration

Here's an example of how to integrate the swap widget into your project:

import { Swap, Config, SwapResult } from 'smart-contract-interaction';

const CurrentConfig: Config = {
  env: Environment.WALLET_EXTENSION, // Wallet extension environment (e.g., MetaMask)
  rpc: {
    local: 'http://localhost:8545',
    mainnet: 'https://mainnet.infura.io/v3/YOUR_INFURA_PROJECT_ID',
    wallet: window.ethereum
  },
  wallet: {
    address: '0xYourWalletAddress',
    privateKey: '0xYourPrivateKey'
  }
};

const configs: SwapPropsObjectType = {
  connectionConfig: CurrentConfig,
  mode: 'dark',                      // Set mode to 'dark'
  swapFromCurrSymbol: 'USDT',         // Swap from USDT
  swapToCurrSymbol: 'CRYPTO5',        // Swap to CRYPTO5 index
  onCompletion: (data: SwapResult) => {
    if (data.success) {
      console.log('Swap successful:', data.receipt);
    } else {
      console.error('Swap failed:', data.error);
   }
  }
};

<Swap configs={configs} />

The onCompletion callback will handle the result of the swap, providing either the transaction receipt for successful swaps or an error message if the swap fails.