Lightning Network
The Lightning Network is a second-layer payment protocol built on top of the Bitcoin blockchain that enables fast, cheap, and scalable transactions. It operates by creating a network of payment channels between users, allowing them to route payments across multiple nodes without needing a direct channel with the final recipient.
This structure allows for thousands of transactions per second, far exceeding the capacity of the base layer. The network uses Hashed Time-Lock Contracts to ensure that payments are routed securely without the risk of intermediary nodes stealing funds.
Each hop in the route is secured by a cryptographic proof, ensuring that the payment only completes if the entire path is successful. This technology is critical for Bitcoin to function as a medium of exchange for small, everyday transactions.
It effectively solves the scalability bottleneck while maintaining the security of the underlying blockchain. The Lightning Network represents a major evolution in how decentralized payment systems can achieve global efficiency.