> For the complete documentation index, see [llms.txt](https://whitepaper.litho.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.litho.ai/docs/developers/examples/wagmi-example.md).
# wagmi + Next.js example
Goal: connect a wallet, show the connected user's LITHO balance, and call a LEP-100 `transfer` from a Next.js 14 app — using the Lithosphere SDK's network registry and ABIs.
## Install
```bash
pnpm add @lithosphere/sdk wagmi viem @tanstack/react-query
```
`@lithosphere/sdk` re-exports the `NETWORKS` registry and `LEP100_ABI` you need; no other Lithosphere packages required.
## Configure wagmi
Set up a single `wagmi.ts` module so every page reuses the same config.
```ts
// app/wagmi.ts
'use client';
import { http, createConfig } from 'wagmi';
import { injected } from 'wagmi/connectors';
import { defineChain } from 'viem';
import { NETWORKS } from '@lithosphere/sdk';
const net = NETWORKS.mainnet;
export const lithosphere = defineChain({
id: net.chainId,
name: 'Lithosphere',
nativeCurrency: {
name: net.currency.name,
symbol: net.currency.symbol,
decimals: net.currency.decimals,
},
rpcUrls: {
default: { http: [net.rpcUrl] },
},
blockExplorers: {
default: { name: 'Makalu Explorer', url: net.explorerUrl ?? '' },
},
});
export const config = createConfig({
chains: [lithosphere],
connectors: [injected()],
transports: {
[lithosphere.id]: http(),
},
});
```
## Wrap the app
```tsx
// app/providers.tsx
'use client';
import { WagmiProvider } from 'wagmi';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import { config } from './wagmi';
import { ReactNode } from 'react';
const queryClient = new QueryClient();
export function Providers({ children }: { children: ReactNode }) {
return (
{children}
);
}
```
```tsx
// app/layout.tsx
import { Providers } from './providers';
export default function RootLayout({ children }: { children: React.ReactNode }) {
return (
{children}
);
}
```
## Balance + Transfer page
```tsx
// app/page.tsx
'use client';
import { useAccount, useBalance, useConnect, useDisconnect, useWriteContract } from 'wagmi';
import { injected } from 'wagmi/connectors';
import { parseUnits } from 'viem';
import { LEP100_ABI } from '@lithosphere/sdk';
const TOKEN_ADDR = '0xreplace-with-your-token-contract...' as const;
export default function Home() {
const { address, isConnected } = useAccount();
const { connect } = useConnect();
const { disconnect } = useDisconnect();
const { data: bal } = useBalance({ address });
const { writeContract, isPending } = useWriteContract();
if (!isConnected) {
return (
);
}
return (
Connected as {address}{' '}
Balance: {bal?.formatted ?? '…'} {bal?.symbol}
);
}
```
## Run it
```bash
pnpm dev
```
Open , click **Connect wallet**, switch your wallet to Lithosphere (chain ID 700777, RPC `https://rpc.litho.ai`), then click **Send**.
## Notes
* `NETWORKS.mainnet` is the live testnet today — there is no separate mainnet chain yet. See [chain-parameters.md](/docs/network/chain-parameters.md).
* For typed inference on `writeContract`, the `as const` re-assertion shown above is not strictly required — wagmi/viem accept `LEP100_ABI` as-is — but adding it gives narrower types in your IDE.
* If you need a server-side read client (e.g. in a Next.js Route Handler), use `new LithoClient('mainnet')` from `@lithosphere/sdk` directly. See the [ethers example](/docs/developers/examples/ethers-example.md) for the Node-side pattern.
---
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