Clear DefinitionsHyperledger Sawtooth
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Pronunciation
[hy-per-lɛdʒər saw-tooth]
Analogy
Hyperledger Sawtooth is like a factory assembly line with interchangeable machines—you can swap out consensus mechanisms or transaction processors without halting production.
Definition
A modular blockchain platform under Hyperledger that supports parallel transaction execution and pluggable consensus algorithms for enterprise applications.
Key Points Intro
Sawtooth’s design focuses on flexibility and scalability through these features:
Key Points
Pluggable consensus: Swap consensus engines (PoET, PBFT, Raft) without rewriting application logic.
Parallel execution: Transaction families run in parallel using an execution scheduler.
Separation of concerns: Core blockchain and application logic are decoupled.
On‑chain governance: Allows dynamic updates to network parameters via proposals.
Example
A supply‑chain consortium uses Sawtooth with PoET consensus and a custom transaction family to track provenance of goods, dynamically updating endorsement policies via on‑chain governance.
Technical Deep Dive
Sawtooth’s architecture splits into validator, REST API, transaction processors, and consensus engine. Validators manage the global state Merkle tree and schedule transactions in parallel. Transaction families define state transition logic in any language via a standardized SDK. Consensus engines communicate with the validator over ZMQ. The global state is stored in a Merkle Radix Tree, enabling efficient proofs and state sync.
Security Warning
When deploying custom transaction processors, validate inputs rigorously; buggy processors can corrupt the global state tree.
Caveat
Parallel execution can lead to non‑determinism if transaction families share state without proper synchronization.
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