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Overview

Wagmi is a TypeScript library for Ethereum development that provides a collection of React Hooks for interacting with Ethereum-compatible blockchains. It’s built on top of viem and offers a modern, developer-friendly API for building dapps. The NPM package @coinbase/cdp-wagmi is a bridge that connects Coinbase’s CDP (Coinbase Developer Platform) Wallets to the wagmi ecosystem—bringing CDP-powered smart wallet functionality into React apps using wagmi hooks. You’ll learn how to install the package, set up the provider, and render your first component.
Check out the CDP Web SDK reference for comprehensive method signatures, types, and examples.

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Prerequisites

  • Node.js 22+ installed
  • A node package manager installed (i.e., npm, pnpm, or yarn)
  • A free CDP Portal account
  • Basic familiarity with React and Wagmi

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1. Install Wagmi and CDP packages

Add the required packages to your project using your preferred package manager. 
# With pnpm
pnpm add @coinbase/cdp-wagmi @coinbase/cdp-core @tanstack/react-query viem wagmi

# With yarn
yarn add @coinbase/cdp-wagmi @coinbase/cdp-core @tanstack/react-query viem wagmi

# With npm
npm install @coinbase/cdp-wagmi @coinbase/cdp-core @tanstack/react-query viem wagmi

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2. Get your CDP Project ID

  1. Sign in to your CDP Portal account
  2. Select a project from the dropdown menu in the top-left
  3. Click the gear icon to view project settings
  4. Copy the Project ID for use in the next step

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3. Configure WagmiProvider

Configure your WagmiProvider with the CDPEmbeddedWalletConnector. CDPEmbeddedWalletConnector provides the necessary context for Wagmi to work correctly with the CDP Frontend SDK. The providerConfig must be provided and is responsible for configuring the EIP-1193 provider’s transports which are used to broadcast non-Base transactions.
main.tsx
import React from 'react';
import ReactDOM from 'react-dom/client';
import { App } from './App'; // Your main App component
import { Config } from '@coinbase/cdp-core';
import { createCDPEmbeddedWalletConnector } from '@coinbase/cdp-wagmi';
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { http } from "viem";
import { baseSepolia, base } from 'viem/chains';
import { WagmiProvider, createConfig, http } from 'wagmi';

// Your CDP config
const cdpConfig: Config = {
  projectId: "your-project-id", // Copy your Project ID here.
}

const connector = createCDPEmbeddedWalletConnector({
  cdpConfig: cdpConfig,
  providerConfig: {
    chains: [base, baseSepolia],
    transports: {
      [base.id]: http(),
      [baseSepolia.id]: http()
    }
  }
});

const wagmiConfig = createConfig({
  connectors: [connector],
  chains: [base, baseSepolia],
  transports: {
    [base.id]: http(),
    [baseSepolia.id]: http(),
  },
});

const queryClient = new QueryClient(); // For use with react-query

ReactDOM.createRoot(document.getElementById('root')!).render(
  <React.StrictMode>
    <WagmiProvider config={wagmiConfig}>
      <QueryClientProvider client={queryClient}>
        <App />
      </QueryClientProvider>
    </WagmiProvider>
  </React.StrictMode>,
);

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4. Sign in the user

Before using Wagmi hooks, users need to be signed in using either CDP React components or hooks. When the user verifies their OTP and is signed in, they will automatically be connected with wagmi. You can use either approach: Option 1: Using React Components 
import { AuthButton } from "@coinbase/cdp-react/components/AuthButton";

<AuthButton /> // Users sign in via this button
Option 2: Using React Hooks 
import { useSignInWithEmail, useVerifyEmailOTP } from "@coinbase/cdp-hooks";
// Implement your own sign-in flow using these hooks
Once signed in, the user’s wallet is automatically available to wagmi.

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5. Use Wagmi hooks

Your application can now call Wagmi hooks. Here’s an example component that demonstrates wagmi’s useSendTransaction hook:
WagmiTransaction.tsx
import { useState } from "react";
import { parseEther } from "viem";
import { useAccount, useSendTransaction, useWaitForTransactionReceipt } from "wagmi";

/**
 * The burn address (0x0000000000000000000000000000000000000000)
 */
const BURN_ADDRESS = "0x0000000000000000000000000000000000000000" as const;

/**
 * The amount to send in ETH (0.00001 ETH)
 */
const AMOUNT_TO_SEND = "0.00001";

/**
 * A component that demonstrates wagmi's useSendTransaction hook
 * by sending 0.00001 ETH to the burn address.
 *
 * @returns A component that allows the user to send a transaction using wagmi.
 */
export default function WagmiTransaction() {
  const { address } = useAccount();
  const [isLoading, setIsLoading] = useState(false);

  const { data: hash, sendTransaction, isPending, error } = useSendTransaction();

  const { isLoading: isConfirming, isSuccess } = useWaitForTransactionReceipt({
    hash,
  });

  const handleSendTransaction = async () => {
    if (!address) return;

    setIsLoading(true);

    try {
      sendTransaction({
        to: BURN_ADDRESS,
        value: parseEther(AMOUNT_TO_SEND),
      });
    } catch (error) {
      console.error("Failed to send transaction:", error);
    } finally {
      setIsLoading(false);
    }
  };

  const handleReset = () => {
    // Reset by refreshing the page or clearing state
    window.location.reload();
  };

  return (
    <div>
      <div>
        <p>
          ⚠️ Warning: This will send {AMOUNT_TO_SEND} ETH to the burn address (0x0000...0000). 
          This transaction cannot be reversed and the ETH will be permanently lost.
        </p>
      </div>

      <div>
        <div>
          <div>Amount: {AMOUNT_TO_SEND} ETH</div>
          <div>To (Burn Address): {BURN_ADDRESS.slice(0, 6)}...{BURN_ADDRESS.slice(-4)}</div>
          <div>From: {address?.slice(0, 6)}...{address?.slice(-4)}</div>
        </div>
      </div>

      {error && (
        <div>
          <strong>Error:</strong> {error.message}
        </div>
      )}

      {!hash && !isPending && !isLoading && (
        <button disabled={!address} onClick={handleSendTransaction}>
          Send {AMOUNT_TO_SEND} ETH to Burn Address
        </button>
      )}

      {(isPending || isConfirming) && (
        <div>
          <div>Sending transaction...</div>
          {hash && (
            <div>
              Hash: {hash.slice(0, 10)}...{hash.slice(-8)}
            </div>
          )}
        </div>
      )}

      {isSuccess && hash && (
        <div>
          <div>
            <div>✅</div>
          </div>

          <div>
            <div>Transaction Confirmed!</div>
            <div>Your transaction has been successfully sent to the burn address</div>
          </div>

          <div>
            <div>Amount: {AMOUNT_TO_SEND} ETH</div>
            <div>To: {BURN_ADDRESS.slice(0, 6)}...{BURN_ADDRESS.slice(-4)}</div>
            <div>
              Block Explorer:{" "}
              <a
                href={`https://sepolia.basescan.org/tx/${hash}`}
                target="_blank"
                rel="noopener noreferrer"
              >
                {hash.slice(0, 10)}...{hash.slice(-8)}
              </a>
            </div>
          </div>

          <button onClick={handleReset}>
            Send Another Transaction →
          </button>
        </div>
      )}
    </div>
  );
}