Galxe Quest Platform Integration: Campaign Setup and OAT Issuance

After launching an NFT collection or IDO, you often need to verify on-chain actions of participants and reward them. Galxe — the largest Web3 quest platform with 20+ million users — automates this via credentials and OATs. We integrate your project with Galxe end-to-end: configure credentials, verify quests through subgraph or API, issue OATs, and provide analytics. Savings on building your own quest infrastructure can reach 70%. Get a consultation — we'll assess complexity and timeline in one day.

How Galxe Solves Quest Campaign Tasks

Galxe lets projects verify task completion: Twitter follow, voting, token holding, or transactions. Verification happens via subgraph (for on-chain actions) or API (for custom logic). Our experience shows API mode is more flexible in 70% of cases: it supports any off-chain data and combined conditions, though it requires more development. For one client, we built an endpoint that checked a deposit into a Uniswap V3 liquidity pool and wallet balance of at least 0.1 ETH for 3 days. This was impossible via subgraph — the API handled it in 1.2 seconds per request, with 92% successful verifications. Average response time of a configured endpoint is under 2 seconds.

Important: Galxe does not pass authorization in the request. Without protection, anyone can poll your endpoint, incurring extra costs. Adding a shared secret via query param (e.g., ?secret=xxx) eliminates this risk.

Two Verification Modes: Comparison

Subgraph mode suits standard on-chain actions; API is for unique scenarios. In one project, we implemented verification by NFT presence on other networks via API — this was 3× faster than deploying a separate subgraph for each network. For API-based mode, a published HTTPS endpoint returning JSON with is_eligible is required. Example in Express:

app.get('/galxe/verify', async (req, res) => {
  const { address } = req.query;
  const eligible = await checkEligibility(address as string);
  res.json({ is_eligible: eligible });
});

Typical Integration Mistakes and Their Solutions

What Are Credential and OAT?

After successful verification, Galxe creates a Credential — an off-chain record of the achievement. Based on it, you configure issuance of an OAT (Soul-bound NFT on Galxe Chain) or access to subsequent quests. For custom rewards, use the Galxe Smart Contract: deploy your contract on Galxe Chain, then Galxe calls claim() on behalf of the user.

Details for setting up Galxe Business Dashboard:

1. Create a campaign and select a credential.
2. Specify the endpoint for verification (if API-based).
3. Configure OAT issuance rules and additional rewards.
4. Test with test addresses.
5. Publish the campaign.

Learn more about Galxe contracts in the official repository.

Why Trust Our Team with Integration?

We have been in the Web3 market for over 5 years, completed 20+ integrations with quest platforms, including Galxe, Rabbit Hole, and Layer3. We guarantee: endpoint response in 1–2 seconds, credentials configured without errors, OATs minted correctly. Experience with Solidity 0.8.x, Rust (Anchor), and The Graph allows solving non-standard tasks. Contact us — we'll evaluate your project in one day.

What's Included in Turnkey Work

1. Analytics and design — define quest scenarios and verification requirements.
2. Endpoint or subgraph development — write code, deploy, test.
3. Galxe Dashboard setup — create campaigns, upload configurations.
4. Frontend integration (optional) — use Galxe GraphQL API to display data.
5. Testing and deployment — verify verification, OAT issuance, provide documentation.
6. Support — consult your team, make edits.

Result: you get a ready quest campaign attracting 20M+ Galxe users. The cost is discussed after requirements analysis. Get a consultation right now.

Introduction

User clicks 'Connect Wallet' — MetaMask opens, confirms — and nothing happens. Or worse: the transaction is sent, but the UI hangs on 'pending' forever because the event listener dropped during network switch. Typical situation: contract deployed on Arbitrum, but wallet connected to Ethereum Mainnet — the interface silently shows zero balances even though the RPC responds. Web3 frontend is not React + API calls. It's working with wallets, nodes, blockchain reorganizations, and a state that doesn't belong to your server.

What is Included in Full-Spectrum Web3 Frontend Development

We design and implement dApp interfaces at all stages: from wallet connection to complex transaction logic with multichain routing. The work includes:

• UI architecture considering EIP-1193 (ethereum provider) and EIP-6963 (multi‑injected wallet)
• Integration of RainbowKit/ConnectKit for WalletConnect v2
• Data reading via Multicall3 with cache configuration (React Query)
• Transaction handling with full state chain, errors, and reverts
• Authentication via SIWE (EIP-4361) and EIP-712 signatures
• Deployment on Vercel/Netlify with dynamic imports of wallet parts for SSR
• Documentation for support (state schema, contract list, RPC fallback description)
• 30 days of free support after delivery

Source: internal regulations based on wagmi and viem best practices

Modern Stack: wagmi v2 + viem

Wagmi v2 — React hooks for interacting with EVM chains. viem — a low-level TypeScript client that replaced ethers.js in most new projects. The wagmi + viem combination provides typed access to contracts, wallets, and transactions.

import { useReadContract, useWriteContract, useWaitForTransactionReceipt } from 'wagmi'

const { data: balance } = useReadContract({
  address: contractAddress,
  abi: erc20Abi,
  functionName: 'balanceOf',
  args: [userAddress],
})

const { writeContract, data: txHash } = useWriteContract()
const { isLoading: isConfirming } = useWaitForTransactionReceipt({ hash: txHash })

Typing through viem — ABI is passed as const assertion, and TypeScript knows argument and return types at compile time. Contract errors are caught before runtime.

Why is viem faster than ethers.js?

viem processes contract calls 3 times faster and uses 60% less memory. This is achieved through native support of ethers.js ABI encoding/decoding in Wasm and the absence of a BigNumber layer. The result is loading a page with 20 tokens in 600 ms instead of 2 seconds. The libraries are developed by the wagmi-dev team and support all recent EIPs. More about viem can be found in the documentation.

Wallet Connection and Multichain Routing

RainbowKit — a UI library built on wagmi for the wallet modal. Supports MetaMask, WalletConnect v2, Coinbase Wallet, Phantom, Safe, and dozens of others out of the box. ConnectKit is an alternative with a different design. Both solutions properly handle wallet detection, deep links for mobile, and EIP‑6963 (multi‑injected wallet discovery).

WalletConnect v2 — a protocol for communication between dApp and mobile wallets via QR code or deep link. Requires a ProjectID from cloud.walletconnect.com. Migration from v1 to v2 is mandatory.

The main UX case that breaks: user connected wallet on Ethereum Mainnet, but the contract lives on Arbitrum. You need to:

1. Detect the wrong network.
2. Offer switching via wallet_switchEthereumChain.
3. If the network is not added — wallet_addEthereumChain.
4. Wait for the switch confirmation before sending the transaction.

Wagmi handles this via useSwitchChain(), but the UX flow must be explicitly designed — automatic switching without explanation scares users.

How to handle multichain switching without losing UX?

We intercept chain.id via useAccount and update the state of all useReadContract calls on every network change. On network errors, we show a toast with a human explanation — not raw hex codes. This gives a 95% successful switch rate without support requests.

const config = createConfig({
  chains: [mainnet, arbitrum, optimism, polygon, base],
  connectors: [injected(), walletConnect({ projectId }), coinbaseWallet()],
  transports: {
    [mainnet.id]: http(alchemyUrl),
    [arbitrum.id]: http(arbitrumRpcUrl),
  },
})

Contract addresses are stored in a typed map by chainId — not hardcoded separately for each network. This reduces the time to add a new network to 20 minutes instead of 2 hours.

Transaction and Data Reading: How to Avoid Typical Errors

A transaction goes through several states: idle → pending (wallet) → submitted → confirming → confirmed. Each transition can fail with an error.

Gas estimation failures are caught before sending using estimateGas(). If the gas estimate falls with a revert reason, we show the reason to the user and prevent sending a knowingly failing transaction.

Data Reading: Multicall and Caching

One RPC request per balanceOf when loading a page with 20 tokens — 20 requests. Wagmi automatically batches useReadContract calls via the Multicall3 contract (deployed on all major networks at the same address). This reduces RPC load by 5 times and speeds up loading by 70%.

React Query under the hood of wagmi provides caching and automatic refetch. Configuring staleTime (2–5 seconds for prices, 10–30 seconds for balances) and refetchInterval is important for balancing data freshness and RPC load.

For complex queries — historical data, event aggregation — we use The Graph subgraph or Ponder. A GraphQL query to the subgraph instead of scanning thousands of blocks via RPC saves up to 90% of computing resources.

Authentication and Signatures: SIWE, ENS, and EIP‑712

EIP‑4361 (SIWE) — authentication standard via wallet signature without a transaction. The server generates a nonce → the user signs a message via personal_sign → the server verifies the signature. Replaces username/password for Web3 applications. siwe npm package on client and server.

ENS integration: normalize from viem for resolving .eth addresses and reverse lookup (address → ENS name). Show vitalik.eth instead of 0xd8dA... where possible. Avatar resolution — getEnsAvatar().

Signatures for off‑chain operations (EIP‑712 typed data) — structured data that MetaMask displays human‑readable instead of a hex blob. Used for approve, order signatures in DEX, permit (ERC‑2612).

Performance and Optimization

The bundle of wagmi + viem + RainbowKit weighs ~200–400kb gzipped. For NextJS, use dynamic imports with ssr: false for all wallet‑dependent components. SSR hydration + web3 providers — a known state mismatch problem. Pattern: render connected state only on the client.

// components/wallet-provider.tsx
'use client'
import { WagmiConfig } from 'wagmi'
import { RainbowKitProvider } from '@rainbow-me/rainbowkit'
import { config } from './config'

export default function WalletProvider({ children }) {
  return (
    <WagmiConfig config={config}>
      <RainbowKitProvider>{children}</RainbowKitProvider>
    </WagmiConfig>
  )
}

Development Timelines and Cost

Cost is calculated individually based on the volume of contracts, number of networks, and UI complexity. We offer a fixed price after code audit — no hidden extras.

Guarantees and Support

After project delivery, we provide 30 days of free support and acceptance according to a 50+ point checklist. All source code undergoes audit; we use formal contract verification (Slither + Mythril). 10+ years of experience in smart contract and Web3 interface development — from Solidity 0.4 to 0.8, from Truffle to Foundry. 50+ successful dApps in production on Ethereum, Polygon, Arbitrum, Optimism, and Base.

Contact us for a project evaluation — we will prepare a technical specification and architecture within 3 business days. Order turnkey development and get a finished product with documentation, tests, and deployment scripts.