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NDA-Protected Blockchain Gaming Company

End-to-End Crypto Payment Gateway Integration

Time:
2023 first half
Team:
10
Industy:
Fintech
Engagement model:
Dedicated Team
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Technology Stack

Layer 2
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2kubernetes-logo
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About the client

Client: A blockchain gaming company developing a crypto payment gateway integrated with Binance Smart Chain (BSC) to enable seamless minting, transfer, and management of fungible tokens (BEP-20) and non-fungible tokens (BEP-721) as in-game rewards and assets.

Project: The Crypto Payment Gateway is an end-to-end IT solution facilitating token and NFT minting, deposit, withdrawal, and management processes. The platform integrates backend services with smart contracts on BSC to support game-related assets, reward systems, and token monetization, all underpinned by strict security and scalability requirements.

 

Objectives

  • Develop a scalable and secure crypto payment gateway supporting minting, deposit, and withdrawal of BEP-20 tokens and BEP-721 NFTs.
  • Implement smart contracts compliant with BEP-20 and BEP-721 standards, ensuring full functional coverage and integration with backend services.
  • Enable multi-signature (MultiSig) transaction signing for enhanced security.
  • Ensure seamless interaction between backend systems and blockchain, including event analysis, notifications, and operation verification.
  • Provide a robust interface and webhook system for real-time operation status updates.
  • Support game-specific business logic such as issuing NFTs as rewards and handling tokenized in-game assets.



Solution

We designed and implemented a modular crypto payment gateway architecture with the following key components:

  • Mint Service: Automated token and NFT minting triggered by backend events under predefined conditions.
  • Smart Contracts: Developed on Solidity (version 0.8+) using Hardhat, covering BEP-20 and BEP-721 standards with 100% unit test coverage in TypeScript.
  • MultiSig Transaction Signing: Implemented a secure multi-signature signing method to authorize blockchain transactions.
  • Event Analysis & Notification Service: Real-time monitoring of blockchain events, triggering notifications via webhook integrations.
  • Backend Integration: Trusted backend services handle balances and operations, while smart contracts process minting, deposits, and withdrawals without direct access to user wallet balances.
  • Scalability: Separate wallets for tokens and NFTs with support for high-volume operations and smooth scalability.
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Key Results

  • The gateway enables secure and scalable handling of crypto assets tied to gaming rewards, improving user engagement and monetization opportunities.
  • Automated minting and withdrawal processes reduce manual intervention and operational overhead.
  • Integration with Binance Smart Chain provides low latency and high throughput, enhancing user experience.
  • MultiSig signing improves security, significantly reducing risks of unauthorized transactions.
  • Modular microservice architecture allows for independent feature upgrades, reducing development time and costs.
  • The platform supports potential token capitalization and exchange listing, adding long-term value for the client.