Leader fault detection and rotation within primary execution committee

oasisprotocol / oasis-core

Performant and Confidentiality-Preserving Smart Contracts + Blockchains

https://oasisprotocol.org

Apache License 2.0

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Leader fault detection and rotation within primary execution committee #340

Open ryscheng opened 6 years ago

ryscheng commented 6 years ago

Any worker can act maliciously in an execution committee. The most problematic is the leader, who drives 1. transaction ordering/batching, 2. forwarding to other workers 3. coordinating commit-reveal, 4. storing states to storage.

Any of these steps can be mishandled. We need ways to

Detect faulty leaders
Prove the consensus layer of its faults
Rotate leaders to satisfy liveness

kostko commented 6 years ago

Leader rotation depends on #366.