Interactive Design of a Zcash Trailing Finality Layer (Hybrid PoW+PoS)
summary
Workshop proposes adding a Zcash hybrid PoW+PoS “trailing finality” layer using an idealized trailing finality oracle then a real PoS finality Gadget, with messages for block status, roster updates and evidence; nodes prefer chains with longer final prefixes, halt on finality violations, and use a default delay (e.g. K=3 example) before finalizing. Open specifics: how to pick K (rollbacks >100 blocks are rare), how issuance splits and staking rewards change miner income, and the minimum cost to attack metric that may become the minimum of compromising finalizers or miners.
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chapters (10)
- 0:00Trailing finality layer design
- 1:49Motivations for Zcash finality
- 8:20Defining trailing finality
- 19:25Security analysis and attacks
- 29:23Idealized finality Oracle
- 35:49Transition to PoS Gadget
- 42:25Accounting and privacy rules
- 50:22Social coordination steps
- 54:14Community next steps
- 57:08Q&A
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