How to Create a Cross-Chain NFT Marketplace

How to Create a Cross-Chain NFT Marketplace | Step-by-Step Guide

The digital landscape is rapidly evolving, with Non-Fungible Tokens (NFTs) at the forefront of this transformation. While NFTs have opened up unprecedented opportunities for creators and collectors, the limitations of single-chain marketplaces have become increasingly apparent. This article delves into the intricacies of building a cross-chain NFT marketplace, exploring its benefits, key components, technical aspects, user experience, monetization strategies, and the challenges involved.

Introduction to NFTs and Cross-Chain Technology

NFTs, or Non-Fungible Tokens, are unique digital assets stored on a blockchain, representing ownership or proof of authenticity for a wide range of items, from digital art and collectibles to music, in-game assets, and even real estate. Unlike cryptocurrencies, which are fungible (meaning each unit is identical and interchangeable), each NFT possesses distinct characteristics and a unique identifier, making it irreplaceable. This inherent uniqueness has fueled their rapid adoption in the digital world, empowering creators with new monetization avenues and offering collectors verifiable ownership of digital scarcity.

A cross-chain NFT marketplace, in essence, is a decentralized platform that enables the seamless buying, selling, and trading of NFTs across multiple distinct blockchain networks. Traditional NFT marketplaces typically operate on a single blockchain, such as Ethereum or Solana. However, the rise of a multi-blockchain ecosystem necessitates a solution that transcends these siloed environments. A cross-chain marketplace addresses this by allowing users to interact with NFTs from various chains within a single, unified interface.

The relevance of cross-chain marketplaces in the current blockchain landscape stems from the need for greater interoperability and liquidity. The benefits of such a platform over traditional single-chain ones are manifold. It breaks down the barriers imposed by individual blockchains, offering a broader audience reach for creators and unlocking more liquidity for collectors. Users are no longer restricted to a single network’s offerings or its native currency, fostering a more vibrant and interconnected NFT ecosystem.

Why Cross-Chain Technology is Important for NFTs

The burgeoning NFT market, while exciting, has faced significant limitations due to its single-chain nature. These limitations include:

• Platform Lock-in: NFTs minted on one blockchain are often confined to that specific network. This means an NFT created on Ethereum cannot be easily traded on a marketplace built on Binance Smart Chain (BSC) without complex bridging solutions, limiting its exposure and potential buyers.
• Limited Audience: A single-chain marketplace restricts an NFT’s reach to users active only on that specific blockchain. This creates fragmented markets and reduces the overall addressable audience for creators.
• High Transaction Fees and Congestion: Blockchains like Ethereum, despite their popularity, often suffer from high gas fees and network congestion during peak times, making smaller transactions economically unfeasible and impacting user experience.

Cross-chain solutions emerge as a powerful answer to these challenges, offering compelling advantages:

• Broader Audience Reach: By supporting multiple blockchains, a cross-chain marketplace can tap into diverse communities and user bases, significantly expanding the visibility and potential market for NFTs.
• More Liquidity: With NFTs from various chains available on a single platform, liquidity is amplified. This means more buyers and sellers can interact, leading to more efficient price discovery and easier trading.
• Access to NFTs Across Multiple Chains: Users gain the flexibility to browse, buy, and sell NFTs regardless of the blockchain they were originally minted on, fostering a truly universal NFT experience.
• Reduced Transaction Costs and Faster Speeds: Users can leverage networks with lower fees and faster transaction speeds for their NFT activities, optimizing their experience and minimizing expenses.

At the heart of cross-chain solutions lies the concept of interoperability. In the blockchain context, interoperability refers to the ability of different blockchain networks to communicate, share data, and transfer assets seamlessly. For NFTs, interoperability is paramount as it enables the free flow of digital assets across disparate ecosystems, unlocking their full potential and fostering a more connected and efficient decentralized future.

Key Components of a Cross-Chain NFT Marketplace

Building a robust cross-chain NFT marketplace requires a sophisticated blend of technologies and protocols. Here are the key components:

• Blockchain Interoperability: This is the foundational element that allows different blockchains to communicate and share data. It involves mechanisms for validating transactions and asset transfers across disparate networks. This can be achieved through various methods, including:
  • Blockchain Bridges: These are protocols that enable the transfer of assets and information between two distinct blockchains. They typically involve locking an asset on the source chain and minting a wrapped version of that asset on the destination chain.
  • Relay Networks: These networks facilitate communication between blockchains by relaying messages and verifying transactions.
  • Atomic Swaps: Direct peer-to-peer exchanges of cryptocurrencies or NFTs between different blockchains without the need for an intermediary.
• Smart Contracts: Smart contracts are self-executing contracts with the terms of the agreement directly written into code. In a cross-chain NFT marketplace, smart contracts play a critical role in facilitating every aspect of a transaction:
  • NFT Minting: Contracts define the rules for creating new NFTs.
  • Listing and Sales: Contracts manage the listing of NFTs for sale, their pricing, and the transfer of ownership upon purchase.
  • Cross-Chain Transfers: Specialized smart contracts are deployed on each connected blockchain to manage the locking, unlocking, and wrapping/unwrapping of NFTs for cross-chain movement.
  • Royalty Distribution: Ensuring creators receive their predetermined royalties on secondary sales across all supported chains.
• Wallet Integration: A crucial aspect of user experience, supporting multi-chain wallets is essential. Users should be able to connect popular wallets like MetaMask, Trust Wallet, Phantom (for Solana), and others to manage their NFTs and cryptocurrency across different networks seamlessly. The marketplace needs to detect which chain the user’s wallet is currently connected to and adjust its interface accordingly.
• NFT Standards: To ensure compatibility and smooth operations, the marketplace must support widely adopted NFT token standards. The most common include:
  • ERC-721: The original and most prevalent standard for unique, non-fungible tokens on Ethereum.
  • ERC-1155: A multi-token standard that allows for both fungible and non-fungible tokens within a single contract, offering greater efficiency for collections with many items.
  • Other blockchain-specific standards like SPL Token Standard for Solana NFTs will also need to be integrated.
• Decentralized Exchange (DEX) Protocols: While not always a primary component for NFT trading itself, integrating with DEX protocols can be beneficial for facilitating token swaps, allowing users to acquire the necessary native cryptocurrency of a particular blockchain to complete NFT transactions on that chain.
• Backend Infrastructure: This encompasses the storage and data management considerations for NFTs across multiple chains. While NFT ownership is recorded on the blockchain, the actual digital asset (image, video, etc.) is often stored off-chain using decentralized storage solutions like IPFS (InterPlanetary File System) or Arweave. The backend must efficiently manage the metadata associated with NFTs and ensure its availability across all integrated chains.

Choosing the Right Blockchain Networks for Your Marketplace

The selection of blockchain networks is a pivotal decision for a cross-chain NFT marketplace, directly impacting its performance, cost-effectiveness, and user base. Here’s a look at popular choices and key considerations:

• Ethereum:
  • Strengths: The pioneer of NFTs, boasts the largest ecosystem, highest security, and a massive developer and user community. Most blue-chip NFTs reside on Ethereum.
  • Weaknesses: High gas fees and network congestion can deter users, especially for smaller transactions.
• Binance Smart Chain (BSC):
  • Strengths: Offers significantly lower transaction fees and faster transaction speeds compared to Ethereum, making it attractive for more frequent and smaller NFT trades. Has a large user base within the Binance ecosystem.
  • Weaknesses: More centralized than Ethereum, and security concerns have been raised by some.
• Polygon:
  • Strengths: A Layer 2 scaling solution for Ethereum, offering extremely low transaction fees and fast speeds while still benefiting from Ethereum’s security. Highly compatible with Ethereum’s tooling.
  • Weaknesses: Relies on Ethereum for its security, and some argue it’s not truly decentralized as a full Layer 1.
• Solana:
  • Strengths: Renowned for its incredibly high transaction throughput (TPS) and ultra-low fees. Ideal for high-volume NFT projects and gaming applications.
  • Weaknesses: Has experienced network outages and has a relatively less mature developer ecosystem compared to Ethereum.
• Flow:
  • Strengths: Developed specifically for NFTs and gaming (e.g., NBA Top Shot), offering a user-friendly experience and scalable infrastructure.
  • Weaknesses: More centralized and less decentralized compared to other major blockchains.
• Avalanche:
  • Strengths: Offers high transaction speeds and low fees with a modular architecture that allows for custom blockchains (subnets).
  • Weaknesses: Smaller NFT ecosystem compared to Ethereum or Solana.

Factors to Consider when Selecting Blockchain Networks:

• Transaction Fees: High fees can significantly impact user engagement, especially for frequent traders. Prioritize chains with competitive fee structures.
• Speed (Transaction Throughput): Fast transaction confirmation times are crucial for a smooth user experience, particularly for time-sensitive auctions or drops.
• Security: The underlying security of the blockchain network is paramount to protect user assets and prevent malicious attacks.
• Community Adoption and Developer Ecosystem: A large and active community means more potential users and a wider pool of developers and resources.
• Scalability: The ability of the network to handle a growing number of transactions and users without compromising performance.
• NFT Standards Compatibility: Ensure the chosen chains support relevant NFT standards (e.g., ERC-721, ERC-1155).

The importance of supporting a wide range of blockchains cannot be overstated. A diverse selection maximizes marketplace adoption by catering to varied user preferences regarding fees, speed, and existing asset holdings. It also positions the marketplace as a central hub for the fragmented NFT market, enhancing its value proposition.

Technical Aspects of Building a Cross-Chain NFT Marketplace

The technical implementation of a cross-chain NFT marketplace involves intricate design and development.

• Blockchain Bridges: These are fundamental to cross-chain functionality. Bridges essentially facilitate the transfer of an NFT’s representation from one chain to another. When an NFT is moved across a bridge, it’s typically “locked” on the original chain, and a “wrapped” or “mirrored” version is minted on the destination chain. The bridge smart contracts manage this locking and minting process, ensuring that the original NFT remains secured and the wrapped NFT on the new chain correctly reflects its ownership and attributes. Different types of bridges exist, including:
  • Lock-and-Mint bridges: The most common type, where the original asset is locked on the source chain, and a new, wrapped asset is minted on the destination chain.
  • Burn-and-Mint bridges: The original asset is burned on the source chain, and a new asset is minted on the destination chain.
  • Liquidity Network bridges: Rely on liquidity pools on both sides of the bridge. Designing and implementing secure and efficient bridges is a complex undertaking, often involving multiple smart contracts and validators.
• Interoperability Protocols: While bridges handle direct asset transfers, interoperability protocols provide a more generalized framework for cross-chain communication and interaction.
  • Polkadot (with Parachains and Bridges): Polkadot is designed as a multi-chain network where different specialized blockchains (parachains) can communicate and interoperate through a central Relay Chain. Bridges connect Polkadot to external networks like Ethereum.
  • Cosmos (with Inter-Blockchain Communication Protocol – IBC): Cosmos aims to create an “Internet of Blockchains” where independent blockchains can communicate and exchange data using the IBC protocol. This allows for sovereign blockchains to connect without relying on a central authority.
  • Chainlink (Cross-Chain Interoperability Protocol – CCIP): Chainlink’s CCIP provides a secure, reliable, and standardized way for applications to send messages, transfer tokens, and execute arbitrary logic across different blockchains. It leverages Chainlink’s oracle networks to ensure tamper-proof interactions. These protocols are crucial for enabling not just asset transfers, but also more complex cross-chain dApp functionality and data sharing.
• Smart Contract Design: The smart contracts are the backbone of the marketplace. For a cross-chain marketplace, their design must account for interactions with multiple chains.
  • NFT Minting: Contracts must be flexible enough to allow minting on different chains or through a central minting service that then bridges the NFT.
  • Listing and Trading: The listing contracts need to be aware of the NFT’s original chain and manage its transfer and sale regardless of where it resides. This often involves a “proxy” or “wrapper” contract on the marketplace’s primary chain that represents the cross-chain NFT.
  • Royalty Management: Ensuring that creator royalties are consistently applied and distributed across all secondary sales, regardless of the chain on which the sale occurs, requires careful smart contract logic and potentially oracle solutions.
  • Security Audits: Given the complexity and value of assets involved, rigorous security audits of all smart contracts are non-negotiable to identify and mitigate vulnerabilities.
• APIs and SDKs: To integrate multiple blockchains seamlessly into your marketplace’s front-end and backend, a robust set of APIs (Application Programming Interfaces) and SDKs (Software Development Kits) are indispensable. These tools provide standardized ways to:
  • Query blockchain data (NFT metadata, ownership, transaction history).
  • Initiate and monitor transactions on different networks.
  • Interact with smart contracts.
  • Connect user wallets. Many blockchain networks provide their own APIs and SDKs, and third-party solutions (e.g., Moralis, Alchemy, Infura) offer abstracted interfaces for multi-chain development.
• Security Measures: Security is paramount in a cross-chain environment, which introduces additional attack vectors.
  • Smart Contract Auditing: Regular and thorough audits by reputable security firms are essential to identify and fix vulnerabilities in smart contracts.
  • Bridge Security: Bridges are often targets for exploits due to the large amount of locked value. Implementing robust security measures for bridges, including multi-signature approvals, time-locks, and continuous monitoring, is critical.
  • User Wallet Security: Educating users on best practices for securing their private keys and encouraging the use of hardware wallets. The marketplace itself should not hold user private keys.
  • Decentralized Storage Security: Ensuring that off-chain NFT data (e.g., images, videos) is securely stored and immutably linked to the NFT on the blockchain.
  • Threat Monitoring: Continuous monitoring for suspicious activities and rapid response mechanisms to potential threats.

User Experience (UX) Considerations for a Cross-Chain Marketplace

A cross-chain NFT marketplace, while technically complex, must present a simple and intuitive user experience (UX) to foster widespread adoption. Users should ideally not need to understand the underlying complexities of blockchain interoperability.

• Simple, Intuitive UI/UX: The interface should be clean, uncluttered, and easy to navigate. Key information, such as NFT details, pricing, and blockchain origin, should be clearly displayed. Visual cues can help users understand which blockchain an NFT is currently on or can be bridged to.
• User Flows for Connecting Wallets and Managing NFTs Across Chains:
  • Effortless Wallet Connection: The process of connecting a multi-chain wallet (e.g., MetaMask, WalletConnect) should be straightforward, with clear prompts and instructions.
  • Unified Inventory View: Users should have a single, consolidated view of all their NFTs, regardless of the blockchain they reside on. The marketplace should abstract away the underlying chain, allowing users to easily filter and sort their collection.
  • Seamless Cross-Chain Listing: Listing an NFT should be a consistent process, whether it’s native to the marketplace’s primary chain or needs to be bridged. The marketplace should guide users through the bridging process if necessary, clearly explaining the steps and associated costs.
  • Intuitive Bridging Interface: For users who wish to move their NFTs between chains, a dedicated and user-friendly bridging interface is essential. This interface should clearly show the source and destination chains, estimated gas fees, and estimated completion times.
• Cross-Chain Transactions: Ensuring Smooth, Seamless Trading:
  • Transparent Gas Fees: Clearly display the estimated transaction fees for each blockchain, allowing users to make informed decisions.
  • Real-time Transaction Status: Provide real-time updates on the status of cross-chain transactions, informing users of delays or successful completions.
  • Error Handling: Implement clear and helpful error messages for any issues encountered during cross-chain operations, guiding users on how to resolve them.
  • Currency Flexibility: Allow users to pay for NFTs using cryptocurrencies from different chains (e.g., paying for an Ethereum NFT with Polygon’s MATIC, facilitated by integrated swap protocols).
• Importance of User Education: Given the novelty of cross-chain technology for many users, comprehensive user education is paramount.
  • Guides and FAQs: Provide detailed guides, tutorials, and frequently asked questions (FAQs) covering all aspects of cross-chain interactions, from connecting wallets to bridging NFTs and understanding gas fees.
  • In-app Tooltips and Explanations: Integrate helpful tooltips and short explanations within the UI to clarify complex terms or processes.
  • Support Channels: Offer accessible customer support channels to assist users with any issues or queries related to cross-chain functionality.

Monetization Strategies for a Cross-Chain NFT Marketplace

A successful cross-chain NFT marketplace needs diverse and sustainable monetization strategies.

• Transaction Fees: This is the most common revenue model for NFT marketplaces. A percentage fee is charged on every successful sale or transaction. For a cross-chain marketplace, this fee can be applied consistently across all supported chains.
• Listing Fees: Some marketplaces charge a small fee for listing an NFT, either a flat rate or a percentage of the listing price. This can help filter out low-quality listings and incentivize serious sellers.
• Membership Subscriptions: Offering tiered membership subscriptions can provide access to premium features, such as:
  • Lower transaction fees.
  • Early access to exclusive NFT drops.
  • Advanced analytics and market insights.
  • Priority customer support.
• Premium Features: Monetizing specific advanced functionalities:
  • Featured Listings/Promotions: Allowing artists or collectors to pay to have their NFTs highlighted on the marketplace’s homepage or specific categories for increased visibility.
  • Lazy Minting: While often offered as a free feature to encourage creation, a marketplace could charge a small fee for “gasless” minting where the NFT is only minted when it’s sold.
  • Customizable Storefronts: Offering artists enhanced customization options for their profile pages or galleries.
• Integrating Additional Services:
  • NFT Auctions: Implementing various auction formats (English, Dutch, sealed-bid) and potentially charging a premium for certain auction types or features.
  • Collaborations with Artists: Partnering directly with renowned artists or brands for exclusive NFT drops, where the marketplace takes a larger share of the primary sale.
  • Virtual Goods Markets: If the marketplace integrates with gaming or metaverse projects, it can facilitate the buying and selling of in-game items or virtual land, potentially taking a cut from these transactions.
  • NFT Staking: Allowing users to stake their NFTs to earn rewards, with the marketplace taking a small percentage of the rewards.
• Potential Partnerships:
  • Existing Blockchain Projects: Collaborating with established blockchain networks or Layer 2 solutions to optimize cross-chain bridging and reduce costs.
  • NFT Projects and DAOs: Partnering with popular NFT collections or Decentralized Autonomous Organizations (DAOs) to host exclusive drops or provide specialized services.
  • DeFi Protocols: Integrating with DeFi protocols to offer lending, borrowing, or fractional ownership of NFTs, generating additional revenue streams from interest or service fees.
  • Analytics Providers: Partnering with data analytics companies to offer advanced market insights as a premium service.

Legal and Regulatory Considerations

Navigating the complex legal and regulatory landscape is crucial for any NFT marketplace, especially one operating across multiple chains and jurisdictions.

• Compliance with Global Regulations:
  • Anti-Money Laundering (AML) and Know Your Customer (KYC): Depending on the nature of the marketplace and its level of decentralization, it may be subject to AML and KYC regulations. This could involve verifying user identities for high-value transactions to prevent illicit activities.
  • Data Protection (e.g., GDPR): If the marketplace collects and processes personal data, it must comply with data protection regulations like GDPR (General Data Protection Regulation) in Europe, which mandates strict rules on data collection, storage, and processing.
  • Securities Laws: The classification of NFTs as securities varies by jurisdiction. If certain NFTs on the platform are deemed securities, the marketplace could fall under securities regulations, requiring specific licenses and compliance measures. This is a highly evolving area of law.
• Potential Legal Challenges:
  • Copyright Issues: A significant concern in the NFT space is copyright infringement. The marketplace must have robust mechanisms to address claims of unauthorized use of copyrighted material, including takedown policies and dispute resolution procedures.
  • Intellectual Property Rights (IPR): Clarifying the intellectual property rights associated with an NFT is essential. Does purchasing an NFT grant full commercial rights, or just ownership of the digital token? The marketplace’s terms of service should clearly define these distinctions.
  • Jurisdictional Concerns: Operating globally means dealing with a patchwork of legal frameworks. A transaction between a buyer in one country and a seller in another, involving an NFT minted on a blockchain headquartered elsewhere, raises complex questions about which jurisdiction’s laws apply. This requires careful legal counsel and a robust terms of service.
• Importance of Establishing Terms of Service and Privacy Policies:
  • Clear Terms of Service (ToS): A comprehensive ToS document is vital. It should cover:
    • User rights and responsibilities.
    • Dispute resolution mechanisms.
    • Ownership rights of NFTs.
    • Prohibited activities (e.g., sale of illegal content).
    • Liability limitations of the marketplace.
    • Fees and payment terms.
  • Transparent Privacy Policy: A clear privacy policy is necessary to inform users about what data is collected, how it’s used, and how it’s protected. This builds trust and ensures compliance with data protection laws.
• Regulatory Sandboxes and Legal Counsel: Given the dynamic nature of blockchain regulations, seeking ongoing legal counsel specializing in blockchain and digital assets is highly recommended. Participating in regulatory sandboxes, where available, can also provide a structured environment to test and refine compliance strategies.

Challenges in Building a Cross-Chain NFT Marketplace

Developing a cross-chain NFT marketplace is a highly ambitious endeavor, fraught with several significant challenges:

• Technical Challenges:
  • Blockchain Compatibility: Different blockchains have distinct architectures, consensus mechanisms, programming languages, and token standards. Achieving seamless compatibility between them, especially for complex NFT functionalities, is a major hurdle.
  • Smart Contract Complexity: Designing smart contracts that can reliably interact with multiple chains while ensuring security and efficiency is extremely difficult. The logic for locking, minting, burning, and relaying information across chains adds layers of complexity.
  • Cross-Chain Communication Reliability: The stability and speed of cross-chain communication protocols (bridges, relay networks) are critical. Any delays or failures can lead to a poor user experience, lost funds, or security vulnerabilities. Ensuring atomicity and finality of transactions across chains is a non-trivial problem.
  • State Synchronization: Keeping the state of NFTs synchronized across different blockchains, especially concerning ownership and metadata updates, is a complex data management challenge.
• User Adoption:
  • Educating Users: Many users are still unfamiliar with basic blockchain concepts, let alone the intricacies of cross-chain interactions. Educating users on the benefits, risks, and usage of a cross-chain marketplace requires clear, concise, and accessible information.
  • Simplifying User Experience: While the underlying technology is complex, the user interface must be intuitive. Abstracting away the complexity of cross-chain operations without compromising transparency is a delicate balance.
  • Wallet Management: Users might be overwhelmed by the need to manage multiple wallets or understand different chain networks.
• Security Risks:
  • Vulnerabilities in Cross-Chain Protocols: Cross-chain bridges and interoperability protocols have historically been prime targets for hackers due to the large sums of locked assets. Exploits in these protocols can lead to significant financial losses and erode user trust.
  • Smart Contract Exploits: Bugs or vulnerabilities in the marketplace’s smart contracts (both on-chain and bridge-related) can be exploited, leading to unauthorized access, theft of NFTs, or manipulation of market data.
  • User Wallet Security: While not directly the marketplace’s fault, phishing attacks and insecure user practices (e.g., losing private keys) can lead to asset loss, impacting the overall user perception of security.
  • Front-Running and Sandwich Attacks: In volatile NFT markets, sophisticated traders can exploit transaction ordering to gain an unfair advantage, especially in auction-based systems.
• Scalability and Performance Issues:
  • Network Congestion: Even with multiple chains, a popular marketplace can still face performance bottlenecks if individual chains become congested or if the cross-chain infrastructure struggles to handle high transaction volumes.
  • Latency: Cross-chain operations inherently introduce latency as transactions need to be confirmed on multiple networks. This can impact the real-time nature of NFT trading.
  • Data Storage and Retrieval: Managing and retrieving large amounts of NFT metadata and transaction history across disparate chains can be computationally intensive and impact performance.
  • Regulatory Uncertainty: The evolving and fragmented regulatory landscape for NFTs across different jurisdictions adds a layer of risk and compliance burden, making it challenging to operate globally.

Final Thoughts

The emergence of Non-Fungible Tokens has irrevocably altered the digital landscape, establishing a new paradigm for digital ownership and creation. However, the initial phase of NFT marketplaces, largely confined to single blockchain networks, presented significant limitations in terms of liquidity, audience reach, and user experience. The advent of cross-chain technology is the crucial evolutionary step, promising to unlock the full potential of NFTs by fostering seamless interoperability across diverse blockchain ecosystems.

Building a successful cross-chain NFT marketplace is a monumental undertaking, demanding a deep understanding of blockchain interoperability, robust smart contract development, and an unwavering commitment to user-centric design. From selecting the most suitable blockchain networks to implementing secure bridging mechanisms and intuitive user interfaces, each component plays a vital role in creating a truly global and accessible platform. Navigating the complex technical hurdles, ensuring stringent security, addressing regulatory ambiguities, and educating users on this nascent technology are paramount challenges that must be meticulously addressed.

Despite these complexities, the future of NFTs is undeniably intertwined with cross-chain interoperability. As the blockchain space continues to mature and cross-chain solutions become more robust and standardized, we can anticipate a future where digital assets flow freely across networks, fostering unprecedented liquidity, innovation, and mainstream adoption for NFTs, ultimately shaping a more interconnected and decentralized digital economy.