Welcome

Doppler is an Ethereum Virtual Machine (EVM) based token launchpad & liquidity bootstrapping protocol. It supports both static bonding curves ("v3") and dynamic bonding curves ("v4") based on a fully onchain dynamic dutch auction. It additionally manages the end to end lifecycle of asset tokenization beyond simply creation, including optional token holder governance and custom fees.

Doppler easily enables developers to...

1

Create arbitrary assets

Memecoins, RWAs, governance tokens, any arbitrary asset, can be created on Doppler

2

Enter price discovery

Efficiently find the correct market driven price for these assets

3

Bootstrap initial liquidity

Build liquidity around the initial price and establish a marketplace for the assets

4

Plug into a thriving ecosystem

Automatically connect your tokens & liquidity to the rich EVM DeFi & Uniswap ecosystems, configure optional token holder governance, have long term customized fees, and more.

Token issuers and application developers no longer have to worry about the complicated, burdensome aspects of a token's lifecycle. From creation to issuance, price discovery to liquidity formation, distribution to ecosystem integrations - Doppler enables you to focus on building compelling, unique applications; not designing auctions, becoming MEV infrastructure experts, or grinding for distribution.

Deployments

Doppler is currently deployed to Base, Unichain, and Ink, with others coming soon.

See the contract addresess, including testnet deployments to Arbitrum, World, and Monad.

Get started

Installation

npm install @whetstone-research/doppler-sdk viem
# or
yarn add @whetstone-research/doppler-sdk viem
# or
pnpm add @whetstone-research/doppler-sdk viem

Quickstart

import { DopplerSDK } from '@whetstone-research/doppler-sdk';
import { createPublicClient, createWalletClient, http } from 'viem';
import { base } from 'viem/chains';

// Set up viem clients
const publicClient = createPublicClient({
  chain: base,
  transport: http(),
});

const walletClient = createWalletClient({
  chain: base,
  transport: http(),
  account: '0x...', // Your wallet address
});

// Initialize the SDK
const sdk = new DopplerSDK({
  publicClient,
  walletClient,
  chainId: base.id,
});

Create your first Doppler token & auction 🎉

import { DynamicAuctionBuilder } from '@whetstone-research/doppler-sdk'

const params = new DynamicAuctionBuilder()
  .tokenConfig({ name: 'My Token', symbol: 'MTK', tokenURI: 'https://example.com/metadata.json' })
  .saleConfig({ initialSupply: parseEther('1000000'), numTokensToSell: parseEther('900000'), numeraire: '0x...' })
  .poolConfig({ fee: 3000, tickSpacing: 60 })
  .auctionByTicks({
    durationDays: 7,
    epochLength: 3600,
    startTick: -92103,
    endTick: -69080,
    minProceeds: parseEther('100'),
    maxProceeds: parseEther('1000'),
    numPdSlugs: 5,
  })
  .withVesting({ duration: BigInt(365 * 24 * 60 * 60) })
  .withMigration({
    type: 'uniswapV4',
    fee: 3000,
    tickSpacing: 60,
    streamableFees: {
      lockDuration: 365 * 24 * 60 * 60,
      beneficiaries: [
        { address: '0x...', percentage: 5000 },
        { address: '0x...', percentage: 5000 },
      ],
    },
  })
  .withUserAddress('0x...')
  .build()

const result = await sdk.factory.createDynamicAuction(params)
console.log('Hook address:', result.hookAddress)
console.log('Token address:', result.tokenAddress)