Documentation

# PNG or JPG, up to 1 MB. Returns the IPFS hash used in createLaunchpadToken.
curl -F "file=@meme.png" https://launchpad-api.arrowfinance.io/api/image
# → { "data": { "ipfsHash": "Qm..." } }

import { createPublicClient, createWalletClient, http, parseAbi, parseEther } from 'viem';

const chain = {
  id: 4663, name: 'Robinhood Chain',
  nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
  rpcUrls: { default: { http: ['https://rpc.mainnet.chain.robinhood.com'] } },
};
const LAUNCHPAD = '0x1Badc838AAe6ac41829180744ea2e1C89b452aAe';
const abi = parseAbi([
  'function creationCost() view returns (uint64)',
  'function createLaunchpadToken((string name,string symbol) tokenConfig,(string ipfsHash,string website,string twitter,string telegram,string description,string metadata) metadataConfig,(uint256 minAmountOut) snipeConfig) payable returns (address token,address gauge)',
]);

const publicClient = createPublicClient({ chain, transport: http() });
const cost = await publicClient.readContract({ address: LAUNCHPAD, abi, functionName: 'creationCost' });

const initialBuy = parseEther('0.001'); // optional: buy your own launch in the same tx (0n to skip)
const { request, result } = await publicClient.simulateContract({
  address: LAUNCHPAD, abi, functionName: 'createLaunchpadToken',
  args: [
    { name: 'My Meme', symbol: 'MEME' },
    { ipfsHash, website: '', twitter: '', telegram: '', description: 'to the moon', metadata: '' },
    { minAmountOut: 0n }, // slippage floor for the initial buy
  ],
  value: BigInt(cost) + initialBuy, // deploy fee + initial buy, one payment
  account,
});
const [token, gauge] = result;      // your new token + its bonding-curve market
await walletClient.writeContract(request);

import { parseAbi, parseEther, zeroHash } from 'viem';

const LAUNCHPAD = '0x1Badc838AAe6ac41829180744ea2e1C89b452aAe';       // quotes
const ROUTER = '0xC216662891De8eaf591cfc74E1b33ABc1779eaFb';     // trades
const quoteAbi = parseAbi([
  'function quote(address token,uint256 amount,uint8 quoteType) view returns ((uint256 amountInEth,uint256 amountInToken,uint256 amountOutEth,uint256 amountOutToken))',
]);
const routerAbi = parseAbi([
  'function buyExactEth(address token,uint256 minAmountOut,bytes32 code) payable',
  'function sellExactTokens(address token,uint256 amountIn,uint256 minAmountOut,bytes32 code)',
]);

// BUY: quoteType 2 = buyExactEth (exact ETH in)
const spend = parseEther('0.01');
const q = await publicClient.readContract({
  address: LAUNCHPAD, abi: quoteAbi, functionName: 'quote', args: [token, spend, 2],
});
const minOut = (q.amountOutToken * 99n) / 100n; // 1% slippage
await walletClient.writeContract({
  address: ROUTER, abi: routerAbi, functionName: 'buyExactEth',
  args: [token, minOut, zeroHash], value: spend, account, chain,
});

// SELL: approve the router once, then quoteType 1 = sellExactTokens (exact tokens in)
// await walletClient.writeContract({ address: token, abi: erc20Abi, functionName: 'approve', args: [ROUTER, amountIn], ... })
const sq = await publicClient.readContract({
  address: LAUNCHPAD, abi: quoteAbi, functionName: 'quote', args: [token, amountIn, 1],
});
await walletClient.writeContract({
  address: ROUTER, abi: routerAbi, functionName: 'sellExactTokens',
  args: [token, amountIn, (sq.amountOutEth * 99n) / 100n, zeroHash], account, chain,
});

// After graduation the curve refuses trades. Swap the token/WETH pair on
// Uniswap V3 instead (SwapRouter02 0xCaf681a66D020601342297493863E78C959E5cb2, 1% fee tier).