Trading on Uniswap

This will walk you through the process to interact with the Uniswap V3 protocol using the Stardust API/SDK and the ethers library. By following this example, you’ll be able to create, sign, and send a transaction to interact with the Uniswap V3 protocol

Prerequisites

Node.js installed on your system
Stardust API key and wallet Id or profile Id
dotenv, axios, ethers v6, @uniswap/v3-sdk, and @uniswap/sdk-core libraries

Setup

Install Dependencies First, you need to install the required dependencies:

npm install dotenv axios ethers @uniswap/v3-sdk @uniswap/sdk-core

Create a .env File Create a .env file in your project root directory and add your Stardust API key and profile ID:

PROD_SYSTEM_STARDUST_API_KEY=your_stardust_api_key
PROD_SYSTEM_STARDUST_PROFILE_ID=your_stardust_profile_id

Code Example

1. Import Libraries and Configure Environment

First, import the necessary libraries and configure your environment using the .env file:

import dotenv from 'dotenv';
import axios from 'axios';
import { ethers } from 'ethers';

dotenv.config();

This code imports dotenv, axios, and ethers libraries and sets up the environment variables.

2. Setup Configuration

Next, set up the API key and profile ID from the environment variables:

const apiKey = process.env.PROD_SYSTEM_STARDUST_API_KEY!;
const profileId = process.env.PROD_SYSTEM_STARDUST_PROFILE_ID!;

Next, set up the RPC provider for the EVM network

const rpcUrl = '<evm-rpc-network-here>';
const rpcProvider = new ethers.JsonRpcProvider(rpcUrl);

3. Instantiate the Stardust Ethers V6 signer

Initialize the Stardust SDK, get the wallet, and instantiate the signer:

 // Initialize Stardust SDK
const sdk = new StardustCustodialSDK(apiKey);

// Get Wallet
const profile = await sdk.getProfile(profileId);
const { wallet } = profile;

const evmAddress = await wallet.evm.getAddress();

// Get V6 Signer
const signer = wallet.ethers.v6.getSigner(rpcProvider);

4. Creating the Uniswap V3 transaction

Refer to the Uniswap SDK documentation for detailed steps on creating a transaction. Your transaction object should look something like this:

const tx = {
  data: methodParameters.calldata,
  to: SWAP_ROUTER_ADDRESS,
  value: methodParameters.value,
  from: evmAddress,
  maxFeePerGas: MAX_FEE_PER_GAS,
  maxPriorityFeePerGas: MAX_PRIORITY_FEE_PER_GAS,
}

5. Send the transaction

Finally, send the transaction using the Ethers V6 Signer, previous instantiated:

const txResponse = await signer.sendTransaction(tx);
console.log(`Sent tx object ${JSON.stringify(txResponse)}`);

Conclusion

You have successfully executed a trade on the Uniswap V3 protocol using the Stardust API/SDK and the ethers library. This example demonstrates how to create, sign, and send a transaction to interact with the Uniswap V3 protocol. You can now build more complex trading strategies and applications using this foundation.

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Typescript SDK

Guides

Trading on Uniswap

Prerequisites

Setup

Code Example

1. Import Libraries and Configure Environment

2. Setup Configuration

3. Instantiate the Stardust Ethers V6 signer

4. Creating the Uniswap V3 transaction

5. Send the transaction

Conclusion

​Prerequisites

​Setup

​Code Example

​1. Import Libraries and Configure Environment

​2. Setup Configuration

​3. Instantiate the Stardust Ethers V6 signer

​4. Creating the Uniswap V3 transaction

​5. Send the transaction

​Conclusion

Prerequisites

Setup

Code Example

1. Import Libraries and Configure Environment

2. Setup Configuration

3. Instantiate the Stardust Ethers V6 signer

4. Creating the Uniswap V3 transaction

5. Send the transaction

Conclusion