Dynamic.xyz

Crossmint Smart Wallets are compatible with Dynamic.xyz. This guide explains how to automatically attach a Smart Wallet to your dynamic embedded wallet, to enable smart wallet features such as gasless transactions, modules, chain abstracted balance, and more, while continuing to leverage dynamic for authentication and key custody.

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Create an API Key

The first step for integrating 3rd party authentication into your project with Crossmint is to obtain a client-side API key. You can find more info for creating a client-side API key here.

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Use Dynamic.xyz for API Key Authentication

After the key is generated, you need to set it to require dynamic.xyz auth tokens for authorization.

To begin, go to the Dynamic dashboard at https://app.dynamic.xyz/.

Once logged in, select an existing project or create a new one.

Then expand the “Developers” section in the left-hand navigation and select “SDK and API Keys” to find your Dynamic Environment ID.

Copy the Dynamic Environment ID and return to the Crossmint developer console. Within the JWT authentication section, select “3P Auth providers” option, and then select Dynamic. Add your Environment ID and save changes.

You now have a properly configured client-side API key to use. Continue on to learn how to add Crossmint Smart Wallets to your application that uses Dynamic for authentication.

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Integration Guide

To integrate Crossmint Smart Wallets with Dynamic as the auth provider you need to begin by configuring the environment ID you located in the above steps to work with the chain you want to create the smart wallet on. With the same project selected as above select the “Chains and Networks” option in the left-hand navigation.

Then click the EVM option to reveal a drawer where you can toggle chain support on and off.

Enable the desired chain for smart wallet support. In this guide, the example will be using polygon-amoy.

With the Dynamic environment ID configuration taken care of, you can now move on to integrating the smart wallets into your app.

Install the Crossmint React UI SDK:

Add your Crossmint client-side API key to your environment file:

NEXT_PUBLIC_DYNAMIC_ENV_ID=_YOUR_DYNAMIC_ENV_ID_
NEXT_PUBLIC_CROSSMINT_API_KEY=_YOUR_CROSSMINT_API_KEY_

The providers.tsx code snippet below is adapted from the demo repository provided by Dynamic. You can view that repo here: https://github.com/dynamic-labs/nextjs-viem-wagmi.

Add a new file with the contents of the CrossmintWrapper.tsx tab to your app and then update your providers.tsx file as demonstrated.

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Load/Create Smart Wallet Using a Wallet Connected via Dynamic.xyz

Using a wallet connected via the Dynamic.xyz SDK as the signer is demonstrated below. You simply pass that wallet as the signer to the getOrCreateWallet function.

Update the default page.tsx file with the content below. This will enable using a Dynamic.xyz embedded wallet or even a browser wallet connected through the Dynamic.xyz SDK.

"use client";

import { useEffect } from "react";
import { useWallet } from "@crossmint/client-sdk-react-ui";
import type { ExternalSigner } from "@crossmint/client-sdk-react-ui";
import { DynamicWidget } from "../lib/dynamic";
import { useDynamicContext, useUserWallets } from "@dynamic-labs/sdk-react-core";
import { isEthereumWallet } from "@dynamic-labs/ethereum";

export default function MyComponent() {
    const { getOrCreateWallet, wallet, status } = useWallet();
    const { primaryWallet: dynamicWallet } = useDynamicContext();

    useEffect(() => {
        const createWalletIfNeeded = async () => {
            if (!dynamicWallet || !isEthereumWallet(dynamicWallet)) {
                return;
            }

            if (status === "not-loaded") {
                const walletClient = await dynamicWallet?.getWalletClient();
                getOrCreateWallet({ type: "evm-smart-wallet", signer: walletClient as ExternalSigner });
            }
        };

        createWalletIfNeeded();
    }, [userWallets, status]);

    return (
        <>
            <DynamicWidget />
            <div>crossmint smart wallet: {wallet?.address}</div>
            <div>dynamic signer wallet: {dynamicWallet?.address}</div>
            <div>status: {status}</div>
        </>
    );
}

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Troubleshooting Tips

If you’re following along using the repo linked above (https://github.com/dynamic-labs/nextjs-viem-wagmi) and are having build issues, check these tips:

  "resolutions": {
    "rpc-websockets": "7.11.0"
  }

import { http, createConfig } from "wagmi";
import { polygonAmoy } from "wagmi/chains";

export const config = createConfig({
    chains: [polygonAmoy],
    multiInjectedProviderDiscovery: false,
    ssr: true,
    transports: {
        [polygonAmoy.id]: http(),
    },
});

declare module "wagmi" {
    interface Register {
        config: typeof config;
    }
}

  ...
  <DynamicContextProvider
      settings={{
        // CHECK THIS NEXT LINE
        environmentId: process.env.NEXT_PUBLIC_DYNAMIC_ENV_ID || "",
        walletConnectors: [EthereumWalletConnectors],
      }}
    >
  ...