RaptorChain implements a hybrid consensus mechanism that combines Proof of Stake (PoS) for high-speed transaction validation with a Byzantine Fault Tolerance (BFT) protocol to ensure security without sacrificing speed.

Additionally, it integrates an edge computing layer that preprocesses data locally to minimize latency.

Each node in the network is equipped with an edge computing unit that can locally verify and temporarily store data before syncing it with the main blockchain.

This layered approach reduces the computational load on the main network, allowing it to handle real-time data streams efficiently while keeping the integrity and security of data intact.

The solution leverages existing technologies like PoS and BFT, which are mature and well-understood, thus minimizing technical risk.

The main challenge lies in optimizing the interaction between consensus and edge units, a field ripe for innovation but demanding strong software engineering skill.

Regulatory landscapes around blockchain technology are still maturing, requiring careful navigation.