Stratum V2 Protocol Specification

This repository contains the Stratum V2 protocol specification.

• 0. Abstract
• 1. Motivation
• 2. Design Goals
• 3. Protocol Overview
• 3.1. Data Types Mapping
• 3.2. Framing
  • 3.2.1. Routing Frames over Channels
• 3.3. Reconnecting Downstream Nodes
• 3.4. Protocol Extensions
  • 3.4.1. Implementing Extensions Support
• 3.4.1. Stratum V2 TLV Encoding Model
• 3.5. Error Codes
• 3.6. Common Protocol Messages
  • 3.6.1. SetupConnection (Client -> Server)
  • 3.6.2. SetupConnection.Success (Server -> Client)
  • 3.6.3. SetupConnection.Error (Server -> Client)
  • 3.6.4. ChannelEndpointChanged (Server -> Client)
  • 3.6.5. Reconnect (Server -> Client)
• 4. Protocol Security
• 4.1. Motivation for Authenticated Encryption with Associated Data
• 4.2. Motivation for Using the Noise Protocol Framework
• 4.3. Choice of cryptographic primitives
  • 4.3.1. Elliptic Curve
    • 4.3.1.1. EC point encoding remarks
  • 4.3.2. Hash function
  • 4.3.3. Cipher function for authenticated encryption
• 4.4. Cryptographic operations
  • 4.4.1. CipherState object
  • 4.4.2. Handshake Operation
• 4.5. Authenticated Key Agreement Handshake
  • 4.5.1. Handshake Act 1: NX-handshake part 1 -> e
    • 4.5.1.1. Initiator
    • 4.5.1.2. Responder
  • 4.5.2. Handshake Act 2: NX-handshake part 2 <- e, ee, s, es, SIGNATURE_NOISE_MESSAGE
    • 4.5.2.1. Responder
    • 4.5.2.2. Initiator
  • 4.5.3. Server authentication
    • 4.5.3.1. Signature structure
• 4.6. Encrypted stratum message framing
• 4.7. URL Scheme and Pool Authority Key
  • 4.7.1. Test vector:
• 4.8. References
• 5. Mining Protocol
• 5.1. Job
  • 5.1.1. Standard Job
  • 5.1.2. Extended Job
    • 5.1.2.1. Extended Extranonce
  • 5.1.3. Future Job
  • 5.1.4. Custom Job
• 5.2. Channel
  • 5.2.1. Standard Channel
  • 5.2.2. Extended Channel
  • 5.2.3. Group Channel
• 5.3. Mining Protocol Messages
  • 5.3.1. SetupConnection Flags for Mining Protocol
  • 5.3.2. OpenStandardMiningChannel (Client -> Server)
  • 5.3.3. OpenStandardMiningChannel.Success (Server -> Client)
  • 5.3.4. OpenExtendedMiningChannel (Client -> Server)
  • 5.3.5. OpenExtendedMiningChannel.Success (Server -> Client)
  • 5.3.6. OpenMiningChannel.Error (Server -> Client)
  • 5.3.7. UpdateChannel (Client -> Server)
  • 5.3.8. UpdateChannel.Error (Server -> Client)
  • 5.3.9. CloseChannel (Client -> Server, Server -> Client)
  • 5.3.10. SetExtranoncePrefix (Server -> Client)
  • 5.3.11. SubmitSharesStandard (Client -> Server)
  • 5.3.12. SubmitSharesExtended (Client -> Server)
  • 5.3.13. SubmitShares.Success (Server -> Client)
  • 5.3.14. SubmitShares.Error (Server -> Client)
  • 5.3.15. NewMiningJob (Server -> Client)
  • 5.3.16. NewExtendedMiningJob (Server -> Client)
  • 5.3.17. SetNewPrevHash (Server -> Client, broadcast)
  • 5.3.18. SetCustomMiningJob (Client -> Server)
  • 5.3.19. SetCustomMiningJob.Success (Server -> Client)
  • 5.3.20. SetCustomMiningJob.Error (Server -> Client)
  • 5.3.21. SetTarget (Server -> Client)
  • 5.3.22. SetGroupChannel (Server -> Client)
• 6. Job Declaration Protocol
• 6.1. Job Declarator Server
• 6.2. Job Declarator Client
• 6.3. Job Declaration Modes
  • 6.3.1. Coinbase-only Mode
  • 6.3.2. Full-Template Mode
  • 6.3.3. Coinbase-only vs Full-Template
• 6.4. Job Declaration Protocol Messages
  • 6.4.1. SetupConnection Flags for Job Declaration Protocol
  • 6.4.2. AllocateMiningJobToken (JDC -> JDS)
  • 6.4.3. AllocateMiningJobToken.Success (Server -> Client)
  • 6.4.4. DeclareMiningJob (Client -> Server)
  • 6.4.5. DeclareMiningJob.Success (Server -> Client)
  • 6.4.6. DeclareMiningJob.Error (Server->Client)
  • 6.4.7. ProvideMissingTransactions (Server->Client)
  • 6.4.8. ProvideMissingTransactions.Success (Client->Server)
  • 6.4.9. PushSolution (Client -> Server)
• 7. Template Distribution Protocol
• 7.1. CoinbaseOutputConstraints (Client -> Server)
• 7.2. NewTemplate (Server -> Client)
• 7.3. SetNewPrevHash (Server -> Client)
• 7.4. RequestTransactionData (Client -> Server)
• 7.5. RequestTransactionData.Success (Server->Client)
• 7.6. RequestTransactionData.Error (Server->Client)
• 7.7. SubmitSolution (Client -> Server)
• 8. Message Types
• 9. Extensions
• 10. Discussion
• 10.1. Speculative Mining Jobs
• 10.2. Rolling nTime
  • 10.2.1. Hardware nTime rolling
• 10.3. Notes
• 10.4. Usage Scenarios
  • 10.4.1. End Device (v2 ST)
  • 10.4.2. Transparent Proxy (v2 any -> v2 any)
  • 10.4.3. Difficulty Aggregating Proxy (v2 any -> v2 EX)
  • 10.4.4. Proxy (v1 -> v2)
  • 10.4.5. Proxy (v2 -> v1)
• 10.5. FAQ
  • 10.5.1. Why is the protocol binary?
• 10.6. Terminology
• 10.7. Open Questions / Issues

Authors

Pavel Moravec pavel@braiins.com
Jan Čapek jan@braiins.com
Matt Corallo bipstratum@bluematt.me