Coinbase Smart Wallet

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Introduction

Coinbase Smart Wallets lets your users easily onboard and create wallet accounts without the need for a browser extension or mobile app. You can see a walkthrough of the feature and use with Dynamic below:

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Integration Steps

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Initial Setup

To set up Coinbase Smart Wallet, simply upgrade to our latest v2.1.alpha, ensure you have wallet login set up, and a network compatible with Coinbase Smart Wallet enabled, then we’ll do the rest!

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Recommend Coinbase Smart Wallet

Dynamic gives you the ability to recommend wallets by making them stick to the top of the wallet list, whether or not they are installed.

You can easily recommend Coinbase Smart Wallet by adding the following to your DynamicContext settings:

<DynamicContextProvider
   settings={{
      ...,
      recommendedWallets: [
         { walletKey: "coinbase" },
      ],
   }}>
   <HomePage />
</DynamicContextProvider>

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Coinbase SW + New To Web3

The Dynamic provided UI components include a New to Web3 help section as part of the DynamicWidget, where we show a common wallet for users to get started for each chain.

You can easily recommend Coinbase Smart Wallet by adding the following to your DynamicContext settings:

<DynamicContextProvider
   settings={{
      ...,
      newToWeb3WalletChainMap: {
         primary_chain: 'evm',
         wallets: {
           evm: 'coinbase'
         },
      },
   }}>
   <HomePage />
</DynamicContextProvider>

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How it works

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Overview

Each wallet is created as a smart contract wallet (ERC-4337), and is secured by a user added Passkey, which is tied to the domain “keys.coinbase.com”.

Because the passkey is scoped to Coinbase’s domain, the wallets will work securely across any site that integrates with Coinbase Smart Wallet.

This is a huge unlock for the ecosystem, as it allows users to have a seamless experience across multiple sites, without any extra lift.

Since the wallet is actually an ERC-4337 compliant smart contract, you can also make use of batch transactions and app-defined paymasters which are supported by the Coinbase Smart Wallet.

Lastly, the wallet is integrated with Magic Spend by default, allowing for seamless onramping of funds into the newly created wallet.

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Signing

The user signs with their passkey, and a function named isValidSignature is subsequently called on their Smart Wallet in order to verify that signature (based on EIP-1271).

Since the user’s passkey is an owner on the Smart Wallet’s contract, it would return that the signature is valid and the transaction can be processed from there. However, what happens if the smart acccount has not yet been deployed?

A Smart Wallet is not deployed on a chain until the first transaction on that chain, so there must be a method of handling the signing of an initial transaction offchain. This is done by adopting the solutions outlined in EIP-6492.

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What’s Next

We’re excited to support the move of Coinbase Smart Wallet to mainnet in the coming weeks. With incredible features such as Magic Spend and Batch Transactions, we see a future of even simpler new user onboarding. Learn more in our deeper blog post on Coinbase Smart Wallet.

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Get up to $20k in paymaster credits

Utilizing Coinbase Smart Wallets or AA accounts on @base with Dynamic?

We teamed up with @coinbasewallet to kick it up a notch 💙

You may be eligible for up to $20K in gas credits: $15K from the Smart Wallet Gas Program + $5K just for being a Dynamic customer.

Fill out this form to indicate that you are building with Dynamic and get credits: apply now