Read launch data

Read a dropCopy Anchor Link

const [creatorFeeRecipient, partnerId, creator, launchedAt] =
  await publicClient.readContract({
    address: LAUNCHPAD,
    abi: launchpadAbi,
    functionName: "drops",
    args: [token],
  });

A token that the launchpad did not launch returns zero values. Read the name, symbol, and contractURI() from the token.

Find a poolCopy Anchor Link

poolKey(quote, token) returns the Uniswap v4 pool key of the token's pool with that quote. The pool exists only if positions(poolId).token is the token.

import { encodeAbiParameters, keccak256 } from "viem";

const key = await publicClient.readContract({
  address: LAUNCHPAD,
  abi: launchpadAbi,
  functionName: "poolKey",
  args: [USDC, token],
});

// The pool ID is the keccak256 of the ABI-encoded pool key.
const poolId = keccak256(
  encodeAbiParameters(
    [
      { type: "address" },
      { type: "address" },
      { type: "uint24" },
      { type: "int24" },
      { type: "address" },
    ],
    [key.currency0, key.currency1, key.fee, key.tickSpacing, key.hooks],
  ),
);

const [positionToken, tickLower, tickUpper] = await publicClient.readContract({
  address: LAUNCHPAD,
  abi: launchpadAbi,
  functionName: "positions",
  args: [poolId],
});
const exists = positionToken === token;

To list all pools of a token, read the DropPoolCreated events of the token.

TradeCopy Anchor Link

Drop pools are standard Uniswap v4 pools. To swap, use any Uniswap v4 router, such as the Universal Router, with the pool key above. The hook does not change swap amounts.

Index launchesCopy Anchor Link

Index these events to follow all launches. All of them come from the launchpad, except DropSwap.

const launches = await publicClient.getContractEvents({
  address: LAUNCHPAD,
  abi: launchpadAbi,
  eventName: "DropCreated",
  fromBlock,
  toBlock,
});

Some notes for indexers:

• DropCreated does not include the name, symbol, or contract URI. Read them from the token at the launch block.
• DropSwap has the swap's amount0 and amount1, from the swapper's side. A negative amount is paid into the pool, including the fee. A positive amount is paid out. sqrtPriceX96 is the price after the swap.
• A collection that finds fees emits both fee events for the pool, even if one part is zero. A collection that finds no fees emits nothing. In burn mode, the creator part is the amount credited to 0x…dEaD.
• Unclaimed credits have no event. Read them with claimable(recipient, asset).