Multi-Network Access Control

Enhanced a service by introducing token gating and NFT minting support with custom metadata, implemented using Ethereum-based smart contracts and Web3 for validation and minting, while also overcoming challenges related to contract address validation, token ownership verification, and testing on various networks.

The story

The client specializes in creating interactive and immersive experiences for live events and broadcasts. It offers a platform that integrates with existing streaming services and enables features such as interactive polls, realtime chats, virtual reality (VR) experiences, augmented reality (AR) elements, and social media integration. Their solutions aim to bring a sense of community and interactivity to live events, allowing viewers to actively participate, share their opinions, and connect with other viewers.

This project aimed to enhance a service by introducing token gating and NFT minting support with custom metadata. It also included implementing airdropping of NFT collections. The goal was to create a robust and user-friendly system for controlling access to services and minting NFTs across multiple networks.

The challenge

In Token Gating, the primary challenge revolved around the validation of contract addresses, ensuring their existence on the selected network. Meanwhile, in the domain of Token Ownership Verification, the complexity arose when verifying user access for non-fungible tokens endowed with attributes, necessitating the examination of multiple tokens until one matched the specified attributes. NFT Minting introduced another challenge, demanding the dynamic configuration of network types and the creation of contract instances based on user preferences, all while ensuring successful contract creation.

Furthermore, the hurdle of Multi-NFT Minting was overcome by addressing the absence of existing functionality for bulk minting, necessitating an alternative approach due to the gas fees associated with storing collections on-chain. Lastly, in the broader context of general challenges, the testing phase encountered obstacles such as the scarcity of test network coins, the deprecation of test networks, and the prohibitively high costs associated with using real coins for testing purposes.

The solution

In addressing Token Gating, contract address validation was achieved through the creation of a contract instance with Web3, where the contract’s name was checked meticulously. Any errors detected during this process were thoughtfully caught and then prominently displayed on the user interface, effectively preventing the creation of chat rooms with invalid contract addresses. Token Ownership Verification saw an elegant solution with the introduction of support for Enumerable within the smart contract. This addition streamlined the retrieval of token IDs, significantly reducing the computational load associated with searching for specific token IDs.

For NFT Minting, a provider was ingeniously crafted using ethers to facilitate network switching and contract instance creation. Leveraging the mintNFT function, NFTs were minted based on user preferences and corresponding IPFS URLs. In tackling the intricacies of Multi-NFT Minting, a tailor-made ‘bulkMintNfts’ function was expertly implemented. This function allowed for the efficient mass minting of NFTs, complete with custom metadata. To mitigate gas fees, an ingenious approach was employed: off-chain collection creation with immutable metadata. Moreover, a custom event filter named ‘CollectionNFTMinted’ was thoughtfully integrated to retrieve token IDs specific to a particular collection.

Lastly, in the face of General Challenges, the project exhibited resilience by seeking alternative solutions to combat the scarcity of test network coins. It adeptly adapted to the ever-evolving landscape of test networks, skillfully navigating through their deprecation. Furthermore, the project demonstrated fiscal prudence by circumventing the exorbitant costs associated with using real coins for testing purposes.

The outcome

The project successfully implemented token gating, NFT minting, and multi-NFT minting, providing a secure and efficient solution for decentralized services. The system ensured access control for service owners and enhanced user engagement. It also addressed challenges in testing, making the project more resilient and cost-effective.

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