To build a crypto banking infrastructure, the client needed their own EVM-compatible blockchain. Binance Smart Chain (BSC) was chosen as the foundation, and we performed a Hard Fork with a consensus modification to implement zero transaction fees. Additionally, a reliable JS library was required for secure wallet management, digital assets, and NFTs within the banking ecosystem.

We forked BSC and modified the consensus to eliminate fees. Deployed 4 servers: a full node and 3 validators, set up Grafana for monitoring and Blockscout for transaction tracking. Developed a TypeScript library for wallet generation, deploying ERC-20 and ERC-721 contracts, managing tokens, transferring funds and NFTs with status tracking. Added a Highload contract for batch transactions with rollback in case of errors. All code was thoroughly tested.

The client received a fully functional private BSC network with zero fees, a robust infrastructure, and a convenient library for integration into their projects.