How to Develop a DeFi Wallet Like Metamask?

How to Develop a DeFi Wallet Like Metamask?

12 July 2023 • 13 min read

Decentralized finance (DeFi) is rising, and DeFi wallets have become crucial gateways to this evolving ecosystem. These wallets offer unique features and benefits, distinguishing them from traditional banking tools and other crypto wallets. One of the most popular DeFi wallets is Metamask. It has played a significant role in driving the adoption of decentralized finance by providing a user-friendly interface and seamless integration with Ethereum and Ethereum-based tokens.

In this article, we'll share Softermii’s expertise, based on nine years of software development experience, and guide you through a journey to create a DeFi wallet that matches and surpasses the functionality of existing wallets. We'll explore key features and the technology stack required for development, provide a step-by-step guide, and address crucial considerations such as security and privacy.

Key Features and Benefits of DeFi Wallets

DeFi wallets have emerged as a tool to access the rapidly evolving DeFi ecosystem. But before we examine how DeFi wallet works, you should know that there is a broad range of DeFi wallet types, each catering to different user needs:

  • Web Wallets are accessible via a web browser and provide easy access and use.
  • Mobile Wallets are popular due to their convenience and mobility.
  • Hardware Wallets cater to security-focused users, storing private keys on a hardware device.
  • Desktop Wallets are downloaded and installed on a PC, providing an optimal balance between convenience and security.

All these digital wallets provide many benefits and unique features, distinguishing them from traditional banking tools and other cryptocurrency wallets. Here are the key aspects that make DeFi wallets a go-to tool for those seeking financial sovereignty.

Non-Custodial Ownership

Unlike traditional bank systems and some crypto exchanges, DeFi wallets are non-custodial. Such wallets give you complete control over your funds and ensure true ownership of your digital assets with a private key.

Create a DeFi wallet


The DeFi system thrives on interoperability, and DeFi wallets exemplify this trait. They can interact with various DeFi protocols and DApps, allowing users to engage in activities such as trading, staking, lending, and borrowing, all from a single interface.

How DeFi wallet works

User Privacy

DeFi wallets focus on user privacy. They don't require personal information to set up and use, offering anonymity that conventional banking systems do not.

Ease of Access and Use

With a DeFi wallet, financial services become globally accessible. You can access your fund and engage with the DeFi app from anywhere in the world if you have an internet connection. Thanks to user-friendly interfaces, even beginners can easily navigate the complex world of decentralized finance.


DeFi wallets leverage blockchain technology's security features to offer users a high level of protection. Private keys, multi-signature wallets, and two-factor authentication make it harder for unauthorized users to access your wallet and your money.

Metamask Features Overview

One of the leading DeFi wallets in the industry today is Metamask. It offers a user-friendly interface, compatibility with Ethereum and Ethereum-based tokens, and browser integration. These features make it a practical tool for new and experienced users to explore blockchain trends and interact with the DeFi world. There is also an in-built swap function, hardware wallet integration, and the ability to add custom tokens in Metamask.

DeFi wallet example

However, Metamask has its shortcomings. This DeFi wallet example needs more support for networks other than Ethereum, meaning users need to catch up on the burgeoning world of multi-chain decentralized finance. Additionally, some users may need help with the service interface, particularly those new to the crypto world. It also needs advanced features like integrated yield farming or sophisticated asset management options that some other DeFi wallets offer.

Technology Stack for DeFi Wallet Development

Creating a decentralized finance wallet is a multifaceted process that requires the careful selection of the right technologies. The quality and reliability of your DeFi wallet usually depend on the chosen technology stack. Here are the major elements that form the backbone of DeFi wallet development:

Blockchain Protocol

A vital component of your DeFi wallet is the blockchain protocol. For instance, Ethereum is a popular choice due to its advanced smart contract functionality and the large ecosystem of DeFi applications. However, the increasing popularity of chains like Binance Smart Chain, Polkadot, and Solana may steer your choice toward a multi-chain approach, thus enhancing the wallet's versatility and appeal.

Programming Languages

The choice of programming languages is critical for your decentralized finance wallet development. Solidity is often used for Ethereum-based applications due to its native compatibility. Node.js is widely employed for back-end development due to its efficiency and extensive library. For front-end development, JavaScript, along with libraries like React.js or Vue.js, is popular for building dynamic and responsive interfaces.

Smart Contract Development and Auditing

DeFi wallets extensively use smart contracts for interacting with various protocols. Solidity or Vyper can be used for writing these contracts. Afterward, it is crucial to have these contracts audited for any security vulnerabilities, for which tools like MythX and Slither can be employed.

Private Key Management and Wallet Libraries

Secure private key management is a cornerstone of DeFi wallets. With Web3.js or Ethers.js libraries, you can create and manage private keys and addresses, handle transaction signing and broadcasting, and interact with the blockchain.

Step-by-step Guide How to Develop a DeFi Wallet

Creating a DeFi wallet involves meticulous planning and implementation. Each step requires careful attention and a deep understanding of the underlying technologies, user requirements, and the evolving DeFi landscape. With a well-thought-out plan and diligent execution, you can build a DeFi wallet that stands out in the rapidly expanding DeFi space.

Select Platform

Platform choice affects the offered features, programming languages, community support, and compatibility with DeFi. For example, Ethereum has a large ecosystem with higher transaction costs. Binance Smart Chain or Solana is cheaper and faster but has smaller ecosystems.

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Discovery & UI/UX Design

Before embarking on the development journey, it's essential to outline clear goals for your DeFi wallet. Define your target audience, the desired functionality, the supported platforms, and the level of security to maintain. Set well-defined goals to have a solid foundation and a clear direction for your project.

To create an intuitive and pleasing user interface, it's important to use tools like Sketch, Adobe XD, or Figma. The choice of technology should allow for the seamless integration of wallet functionality with the UI panel.

Wallet Architecture and Infrastructure Setup

The architecture of a DeFi wallet includes both front-end and back-end components. The back-end handles transactions, private keys, and interactions with blockchain networks. Meanwhile, the front-end deals with user interface and interaction. 

You'll need to set up infrastructure for these components, often using cloud-based services for scalability and reliability. Infrastructure setup also involves:

  • Selecting a database for storing data;
  • Setting up servers;
  • Choosing an appropriate blockchain protocol.


The development phase starts right after you begin the infrastructure setup. It is a critical stage that translates your project's concept into a functional application. The wallet's core functionalities (creating and managing addresses, signing and broadcasting transactions, and interacting with DeFi protocols) are developed primarily through smart contracts.

Privacy and security measures are also implemented during the development phase. These include secure private key management, encrypted communication, anti-phishing measures, and smart contract audits.

Testing and Quality Assurance

This stage helps to identify bugs, security vulnerabilities, and usability issues. Include unit testing, integration testing, and end-to-end testing to check every aspect of your wallet. Security audits are particularly vital to identify and fix potential vulnerabilities. Quality assurance ensures your DeFi wallet provides a seamless, safe, and efficient user experience.

Technical Documentation

Last but not least, you need to create all the documentation for your DeFi wallet, particularly the product manual.

Read Also: Financial Literacy App Development

How much does it cost to make a DeFi wallet? 

Determining the cost of a DeFi crypto wallet development involves considering a wide range of factors, as this is a highly customized process that can vary based on the specific requirements and objectives of the project:

  • Scope of the Project. The complexity and scope of your DeFi wallet largely dictate the cost. It includes such factors as the number and sophistication of features, the type of wallet, the number of supported blockchain networks, and the level of user interface refinement.
  • Development Team. The cost depends on the team you're hiring: blockchain developers, front-end and back-end developers, UI/UX designers, QA testers, and project managers. It also may vary whether you hire an in-house team, outsource to a dedicated offshore team, or hire freelancers.
  • Time Frame. The time frame for development can also impact the cost. A faster development timeline might require more resources or higher-priced developers to meet the deadline.
  • Security Measures. Given the importance of security in DeFi wallets, you should allocate a significant part of the budget to security measures. They include developing secure features, regular security audits, and penetration testing. Deposit and loan systems should also be implemented securely.
  • Maintenance and Updates. Remember to consider post-development costs such as maintenance, regular updates, new feature additions, and customer support. They can make up a significant part of the wallet's total cost.

Given these factors, a detailed understanding of the project is needed to provide the exact cost estimate. Based on industry averages and our experience, the cost of developing a DeFi wallet can range from $50,000 to $200,000+. The lower end might cover a basic DeFi wallet with essential features and one or two supported networks. In comparison, a wallet at the higher end would be highly refined with a broad feature set, support multiple networks, and include extensive security measures.

In the previous section, we've discussed the essential steps to create your own DeFi wallet. Let's recap those with estimated costs in the table below.

Development Stages




Discovery & UI/UX design

280 hours

$11 200


Architecture and infrastructure setup

480 hours

$19 200



640 hours

$25 600


Testing and quality assurance

240 hours

$9 600


Creating technical documentation

40 hours

$1 600


1 680 hours (approximately 9 months)

$67 200

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Remember, these are estimated costs, and actual ones may vary. Therefore, planning your project and understanding your specific requirements is important. It will give you a clearer understanding of the potential costs involved in your DeFi wallet project.

Security and Privacy Considerations in DeFi Wallet

Security and privacy are among the most pressing concerns when you create a crypto DeFi wallet. Given the irreversible nature of blockchain transactions and the high-value assets often stored in wallets, ensuring robust security and privacy protocols is a top priority.

Private Key Security

The private key is akin to the password for a DeFi wallet; whoever possesses it controls the assets in the wallet. Thus, secure generation, storage, and usage of private keys are paramount. Implementing encrypted storage, secure key recovery methods, and hardware wallet integration can enhance private key security.

Smart Contract Vulnerabilities

Many DeFi wallets rely on smart contracts to interact with other DeFi protocols. However, smart contracts are code and can contain bugs or vulnerabilities. Ensure to address common vulnerabilities like reentrancy attacks, integer overflows, and unchecked external calls. Thus, it's important to perform comprehensive smart contract auditing and testing.

Front-end Vulnerabilities

The wallet's user interface could be a target for attacks like phishing. To combat this, implementing Content Security Policy (CSP) and ensuring secure HTTP headers can be beneficial. Regular penetration testing can also help identify and address potential vulnerabilities.

Network Security

Securing communication between the wallet and the blockchain network is pivotal to preventing man-in-the-middle attacks. Technologies like HTTPS and SSL play a vital role in ensuring this security.

Transaction Confirmation

Inform users about the details of a transaction before confirming it. Implement multiple layers of confirmation and display payment details to prevent user errors or deceitful transactions.

Create a crypto DeFi wallet

Regarding privacy, DeFi wallets can inherently expose some user data on the blockchain, such as transaction history and account balances. However, wallet developers can take the following measures to enhance user privacy:


Unlike traditional banking systems, DeFi wallets do not require users to disclose personal identity information. Keeping user information requirements to a minimum can enhance privacy.

Address Privacy

Regularly changing the address used for transactions can prevent tracing transaction history to a single address.

Network Privacy

VPNs or Tor technologies can help users to secure their internet connection and IP address.

The Softermii team implements state-of-the-art measures to ensure the robust security and privacy of the developed DeFi wallets. It involves everything from secure coding practices and comprehensive testing to user education and proactive response to new threats. We understand the trust users place in us when using our wallets, and we strive to honor and uphold that trust through our steadfast commitment to security and privacy.


DeFi wallets have become one of the main fintech trends in the rapidly evolving DeFi ecosystem, offering unique features and benefits that set them apart from traditional banking tools and other crypto wallets.

Their advantages, such as non-custodial ownership, interoperability, user privacy, ease of access and use, and security, make them indispensable tools for the decentralized finance ecosystem.

At Softermii, we have extensive experience in software development and can provide the expertise needed to navigate the complexities of DeFi wallet app development. We understand the limitations of existing options like Metamask and can help you create a wallet that better serves the growing decentralized finance community.

Contact our team to start developing your own DeFi wallet. We'll be happy to discuss your project requirements, provide further guidance, and bring your vision to life. Trust us to deliver a secure, reliable, and innovative DeFi wallet solution.

Frequently Asked Questions

Can I develop a DeFi wallet on multiple blockchain platforms?

Yes, you can develop a multi-chain wallet. With the growth of the DeFi sector across blockchains like Ethereum, Binance Smart Chain, and Polkadot, these wallets have become increasingly popular. They allow users to interact with DeFi applications across various blockchains, all from a single wallet interface.

How long does it take to develop a DeFi wallet?

The development timeframe for a DeFi wallet depends on various factors. It could take several weeks to a few months for a basic DeFi wallet with standard features. More complex wallets with a range of advanced features could take several months to over a year to develop. Remember that even after the initial development, regular updates and maintenance are essential to ensure the wallet remains secure, functional, and up-to-date with the evolving DeFi landscape.

Can I monetize my DeFi wallet?

There are several ways to monetize a DeFi wallet. One common method is integrating a token swap feature and charging a small fee for every transaction. Wallets can also earn revenue by listing new tokens, where the token issuer pays a fee to be listed in the wallet. You may also offer premium features or services for a fee if your wallet has a large user base.

Can I add features like decentralized exchange (DEX) integration to my DeFi wallet?

You can integrate additional features like decentralized exchange functionality into your DeFi wallet. It would allow users to trade assets directly from their wallet interface, enhancing their DeFi experience. Integration with DEX protocols like Uniswap, SushiSwap, or PancakeSwap can provide seamless token-swapping capabilities within the wallet.

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