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Doppler is an onchain protocol for launching tokens through various price discovery auctions. Applications integrate Doppler, configure their token launch parameters, and get to market faster than building in-house smart contracts. Teams including Zora, Paragraph, Noice, and Bankr use Doppler to create new tokens by configuring inputs such as supply curves, vesting + inflation schedules, governance structures, and ongoing economics, such as fees or treasury management.

Doppler is now available on Solana devnet. View the SDK examples to get started.

Start building on Base

npm install @whetstone-research/doppler-sdk viem

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

// 1. Set up viem clients
const publicClient = createPublicClient({
  chain: base,
  transport: http(),
});

// 2. Set up your local wallet client
const walletClient = createWalletClient({
  chain: base,
  transport: http(),
  account: '0x...', // Your wallet address
});

// 3. Initialize the SDK
const sdk = new DopplerSDK({
  publicClient,
  walletClient,
  chainId: base.id,
});

// 4. Configure a multicurve auction using market cap ranges
const WETH = '0x4200000000000000000000000000000000000006';

const params = sdk
  .buildMulticurveAuction()
  .tokenConfig({
    name: 'TEST',
    symbol: 'TEST',
    tokenURI: 'https://example.com/metadata.json'
  })
  .saleConfig({
    initialSupply: parseEther('1000000000'),
    numTokensToSell: parseEther('900000000'),
    numeraire: WETH,
  })
  .withCurves({
    numerairePrice: 3000, // ETH = $3000 USD
    curves: [
      {
        marketCap: { start: 500_000, end: 1_500_000 },
        numPositions: 10,
        shares: parseEther('0.4')
      },
      {
        marketCap: { start: 1_000_000, end: 5_000_000 },
        numPositions: 10,
        shares: parseEther('0.5')
      },
      {
        marketCap: { start: 5_000_000, end: 'max' },
        numPositions: 1,
        shares: parseEther('0.1')
      },
    ],
  })
  .withGovernance({ type: 'noOp' })
  .withMigration({ type: 'noOp' })
  .withUserAddress('0x...')
  .build()

const result = await sdk.factory.createMulticurve(params)
console.log('Pool:', result.poolId)
console.log('Token address:', result.tokenAddress)

Example configuration details

With this Doppler Multicurve Launch on Base, we configured:

• Token config - metadata such as the name, symbol, and other relevant data like an image.

• Sale config - allocations of the token and how much is available for sale.

• Curves - Defined in USD, the first curve ($500k) sets launch price.

• Governance & Migration - no onchain governance or protocol migration configured.

Next steps

Continue learning more about Doppler and follow along with other SDK examples.