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What is RHP4 protocol?

What is RHP4 Protocol?

RHP4 stands for "Renter-Host Protocol 4" and is the latest iteration of the protocol used for data communication between renters and hosts on the Sia decentralized storage network. It is a major technical upgrade slated to follow Sia's upcoming V2 hard fork (Utreexo upgrade), scheduled for June 6, 20251.

Key Features and Improvements

  • Increased Parallelism: RHP4 allows renters and hosts to conduct multiple data uploads or downloads concurrently, improving speeds and overall performance.
  • Reduced Protocol Overhead: The new protocol is engineered to streamline transactions and decrease inefficiencies in data exchange between network participants.
  • Enhanced Browser Usability: With RHP4, end users will be able to upload and download data directly from their web browser, eliminating the need for dedicated client software.
  • New Storage Features: RHP4 is a foundational requirement for several upcoming Sia features, such as:
    • Early contract termination
    • Storage capacity reservation
    • Contract renewal fund rollover

Technical Benefits

  • Modular Integration: The new protocol is integrated into updated Sia software components like coreutils, hostd, and renterd, facilitating better scalability and ease of development.
  • Decentralized and Scalable: Supports broader hardware compatibility, making it possible to run Sia full nodes on devices as lightweight as smartphones and browsers21.
  • Performance Benchmarks: RHP4 introduces significant improvements over prior protocols, especially concerning upload/download speeds and decentralized operation from the browser1.

Roadmap and Implementation

  • Implementation Timeline:
    • October 2024: RHP4 support in coreutils in progress.
    • November–December 2024: RHP4 support added to major Sia software modules, release of v2.0-ready software in tandem with the "V2" hardfork1.
  • Release Note Highlights:
    • Support for contract revision/renewal directly through the protocol.
    • Refined data structure for contract management.
    • Removal of unused parameters to improve efficiency3.

Summary Table

FeatureDescription
Parallel uploadsMultiple uploads/downloads at once, improving data transfer performance
Browser supportUpload/download files directly in a web browser, no extra software needed
Early contract terminationEnd storage contracts before expiry if needed
Capacity reservationReserve storage in advance
Contract renewal fund rolloverMaintain balances across contract renewals
Modular integrationEasily integrates into updated Sia services (coreutils, hostd, and renterd)

References

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