Stake-Weighted F3 Finality

A draft Filecoin Improvement Proposal and its supporting analyses. The discussion is on the FIPs repo: https://github.com/filecoin-project/FIPs/discussions/1288.

• Stake-Weighted F3 FinalityThe draft FIP. Finality weighted by staked FIL, paid per signed certificate, funding left open.
• Funding the finality reward: options and a recommendationWhere the ~100M FIL of pool income could come from, what each option costs and who pays, and a recommendation.
• How the finality reward is paid forThe funding numbers walked through in plain language: posted rate, release schedule, what a staker and a storage provider see, FAQ.
• Analysis of storage-only attacks under Expected Consensus, QAP Fast Finality, and Stake FinalityWhat storage power alone can do under Expected Consensus, F3 on QAP, and F3 on stake, and what each share of QAP costs.
• Two classes of stake: an idea for explorationAn idea for exploration: a locked class of stake pledged behind provider sectors. Not part of the FIP.
• Beyond the chain: operationalizing stake-weighted finalityWhat has to exist outside the protocol for the mechanism to work: operators, custodians, wallets, finality consumers, dashboards, and the recruitment campaign.