Get Started
Getting Started with Doppler V3 SDK
This section guides you through setting up and using the Doppler V3 SDK to interact with the Doppler protocol.
Prerequisites
Node.js: Version
18.14
or highernpm or yarn: Package manager for installing dependencies
Web3 Provider: Access to Ethereum RPC endpoints (Infura, Alchemy, etc.)
Wallet: MetaMask or similar wallet for transaction signing
Installation
Install the Doppler V3 SDK package:
npm install doppler-v3-sdk
# or
yarn add doppler-v3-sdk
Basic Setup
1. Import the SDK
import {
ReadFactory,
ReadWriteFactory,
ReadUniswapV3Pool,
DOPPLER_V3_ADDRESSES
} from 'doppler-v3-sdk';
2. Initialize Drift Client
The SDK uses Drift for blockchain interactions. Set up your Drift client with both read and write capabilities:
import { Drift } from 'drift';
// For read-only operations
const drift = new Drift({
rpcUrl: 'https://sepolia.base.org',
chainId: 84532 // Base Sepolia
});
// For read-write operations (with wallet)
const driftWithWallet = new Drift({
rpcUrl: 'https://sepolia.base.org',
chainId: 84532,
wallet: yourWalletProvider // MetaMask, WalletConnect, etc.
});
3. Get Protocol Addresses
// Get addresses for the current network
const chainId = 84532; // Base Sepolia (change to 8453 for Base Mainnet, 130 for Unichain Mainnet, etc.)
const addresses = DOPPLER_V3_ADDRESSES[chainId];
const airlockAddress = addresses.airlock;
Core Concepts
Factory Classes
The SDK provides two main factory classes:
ReadFactory
: For querying protocol state and reading dataReadWriteFactory
: For creating tokens and interacting with pools
Asset Lifecycle
Token Creation: Deploy new tokens through the factory
Price Discovery: Initial liquidity provision and price discovery phase
Migration: Move liquidity to standard Uniswap V2 pools (or V4 pools if using fee streaming)
Trading: Normal trading on migrated pools
Quick Start Examples
Reading Protocol Data
// Create a read factory instance
const factory = new ReadFactory(airlockAddress, drift);
// Get information about a deployed asset
const assetData = await factory.getAssetData(tokenAddress);
console.log('Asset details:', {
numeraire: assetData.numeraire,
governance: assetData.governance,
pool: assetData.pool,
totalSupply: assetData.totalSupply.toString()
});
// Check module state
const moduleState = await factory.getModuleState(moduleAddress);
console.log('Module state:', moduleState);
Creating a New Token
// Create a read-write factory instance
const factory = new ReadWriteFactory(airlockAddress, driftWithWallet);
// Define token creation parameters
const createParams = {
integrator: integratorAddress,
userAddress: userAddress,
numeraire: numeraireAddress, // USDC, WETH, etc.
contracts: {
tokenFactory: addresses.tokenFactory,
governanceFactory: addresses.governanceFactory,
poolInitializer: addresses.poolInitializer,
liquidityMigrator: addresses.liquidityMigrator
},
tokenConfig: {
name: "My Token",
symbol: "MTK",
decimals: 18
},
vestingConfig: "default" // or custom configuration
};
// Encode the creation parameters
const { createParams: encodedParams } = factory.encode(createParams);
// Simulate the creation transaction
const simulation = await factory.simulateCreate(encodedParams);
console.log('Gas estimate:', simulation.gasEstimate);
// Execute the creation transaction
const txHash = await factory.create(encodedParams);
console.log('Transaction hash:', txHash);
// Wait for transaction confirmation and get the deployed asset address
const receipt = await drift.waitForTransactionReceipt({ hash: txHash });
const createEvent = receipt.logs.find(log =>
log.topics[0] === '0x...' // Create event signature
);
const deployedTokenAddress = `0x${createEvent.topics[1].slice(26)}`;
console.log('Deployed token address:', deployedTokenAddress);
Interacting with Your Created Pool
Once you've created a token, you can interact with its price discovery pool:
// Get the asset data to find the price discovery pool address
const assetData = await factory.getAssetData(deployedTokenAddress);
const poolAddress = assetData.pool;
// Create a pool instance for the price discovery pool
const pool = new ReadUniswapV3Pool(poolAddress, drift);
// Get pool information
const slot0 = await pool.getSlot0();
const token0 = await pool.getToken0();
const token1 = await pool.getToken1();
const fee = await pool.getFee();
console.log('Price discovery pool info:', {
sqrtPriceX96: slot0.sqrtPriceX96.toString(),
tick: slot0.tick,
token0,
token1,
fee
});
// Get pool events (will show the initial mint from token creation)
const mintEvents = await pool.getMintEvents();
const swapEvents = await pool.getSwapEvents();
console.log(`Found ${mintEvents.length} mint events and ${swapEvents.length} swap events`);
// Note: After migration, liquidity moves to a V2 pool (or V4 if using fee streaming)
// The migrationPool address can be found at assetData.migrationPool
Environment Configuration
Required Environment Variables
# RPC Endpoint
RPC_URL="https://sepolia.base.org"
# Wallet Private Key (for automated transactions)
PRIVATE_KEY="your-private-key"
# Network Configuration
CHAIN_ID=84532
Network Support
The SDK supports multiple networks:
Base Sepolia (chainId: 84532) - Testnet
Base Mainnet (chainId: 8453) - Production
Unichain Mainnet (chainId: 130) - Production
Unichain Sepolia (chainId: 1301) - Testnet
Ink (chainId: 57073) - Production
For complete network addresses and additional supported networks, see the Contract Addresses documentation.
You can get free Base Sepolia ETH from the Base Sepolia faucet to test your applications.
Error Handling
The SDK provides comprehensive error handling for common scenarios:
try {
const assetData = await factory.getAssetData(tokenAddress);
} catch (error) {
if (error.message.includes('Asset not found')) {
console.log('Token not deployed on Doppler');
} else {
console.error('Unexpected error:', error);
}
}
Next Steps
Explore the Factory Reference for detailed API documentation
Learn about Token Operations for managing deployed tokens
Understand Quoter Usage for price calculations
Check out V4 Migration for upgrading to V4
Support
For additional help and examples:
Check the Token Launch Examples for comprehensive deployment scenarios
Review the Implementation Guide for protocol details
Join the community for discussions and support
Last updated