Integration Guide

import { createPublicClient, createWalletClient, http, parseEther } from "viem"
import { privateKeyToAccount } from "viem/accounts"

const INK_MAINNET = {
  id: 57073,
  name: "Ink",
  nativeCurrency: { name: "Ether", symbol: "ETH", decimals: 18 },
  rpcUrls: { default: { http: ["https://rpc-gel.inkonchain.com"] } },
}

const HOOK = "0x4cC8F6d5B7cE150CCC0A9B7664532B1283b96AC4"

const publicClient = createPublicClient({ chain: INK_MAINNET, transport: http() })
const account = privateKeyToAccount(process.env.PRIVATE_KEY)
const walletClient = createWalletClient({ account, chain: INK_MAINNET, transport: http() })

const state = await publicClient.readContract({
  address: HOOK,
  abi: INKY_PUMP_HOOK_ABI,
  functionName: "getLaunchState",
  args: [launchId],
})

console.log("Finalized:", state.finalized)
console.log("Target raise:", state.targetRaise)
console.log("Tokens remaining on curve:", state.tokensRemaining)

const LAUNCH_VIEW_MODULE = "0xce83E3659251116d114Ec1CA729ffB49B99403c3"

const state = await publicClient.readContract({
  address: HOOK,
  abi: INKY_PUMP_HOOK_ABI,
  functionName: "getLaunchState",
  args: [launchId],
})

const { tokensOut, cost, refund, tokensRemaining } = await publicClient.readContract({
  address: LAUNCH_VIEW_MODULE,
  abi: LAUNCH_VIEW_MODULE_ABI,
  functionName: "previewBuyLocal",
  args: [
    state.saleSupply,
    state.targetRaise,
    state.gainBps,
    state.sold,
    state.saleSupply - state.sold,   // remaining
    parseEther("0.1"),                // ethIn
  ],
})

const minTokensOut = (tokensOut * 99n) / 100n  // 1 percent slippage

const captcha = await fetchCaptchaFromBackend({ launchId, account: account.address })

const hash = await walletClient.writeContract({
  address: HOOK,
  abi: INKY_PUMP_HOOK_ABI,
  functionName: "buy",
  args: [launchId, minTokensOut, captcha],
  value: parseEther("0.1"),
})

const receipt = await publicClient.waitForTransactionReceipt({ hash })

const emptyCaptcha = { deadline: 0n, signature: "0x" }

import { parseAbiItem } from "viem"

const tradeEvent = parseAbiItem(
  "event Trade(uint256 indexed launchId, address indexed trader, uint8 tradeType, (uint256 priceAfter, uint256 marketCap) priceData, (uint256 ethAmount, uint256 tokenAmount, uint256 fee) tradeData, uint256 refund)"
)

const unwatch = publicClient.watchEvent({
  address: HOOK,
  event: tradeEvent,
  onLogs: (logs) => {
    for (const log of logs) {
      console.log("Trade:", log.args)
    }
  },
})

const referralEvent = parseAbiItem(
  "event Referral(uint256 indexed launchId, address indexed trader, string referralCode)"
)

const params = {
  name: "My Token",
  ticker: "MINE",
  description: "...",
  imageUrl: "https://...",
  telegram: "",
  twitter: "",
  website: "",
  creatorFeeSplitBps: 7000,
  gainBps: 50_000,
  targetRaise: parseEther("3"),
  antiSnipeDuration: 40,
  startTime: 0n,
}
// To prebuy, pass `value: parseEther("0.1")` (or any amount) on the writeContract call below.

const hash = await walletClient.writeContract({
  address: HOOK,
  abi: INKY_PUMP_HOOK_ABI,
  functionName: "createLaunch",
  args: [params],
  value: 0n,
})

const receipt = await publicClient.waitForTransactionReceipt({ hash })

// Parse the LaunchCreated event from receipt.logs to get the launchId and token address

const hash = await walletClient.writeContract({
  address: HOOK,
  abi: INKY_PUMP_HOOK_ABI,
  functionName: "withdrawFees",
})

const poolKey = {
  currency0: tokenAddress < WETH ? tokenAddress : WETH,
  currency1: tokenAddress < WETH ? WETH : tokenAddress,
  fee: 1_000,
  tickSpacing: 60,
  hooks: HOOK,
}

cast call 0x4cC8F6d5B7cE150CCC0A9B7664532B1283b96AC4 \
  "getLaunchState(uint256)" \
  $LAUNCH_ID \
  --rpc-url https://rpc-gel.inkonchain.com