{
  "id": 1703106,
  "title": "Tsampi BFT: Leaderless One-Round Voting with Parameterized Finality",
  "url": "https://urgent.news/2026/08/18/tsampi-bft-leaderless-one-round-voting-with-parameterized-finality",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-08-18T12:10:59.000Z",
  "source": {
    "name": "Lobsters",
    "slug": "lobsters",
    "url": "https://www.tsampi.com/tsampi-bft-1.1.pdf"
  },
  "original_language": "en",
  "account": "Tsampi BFT is a leaderless Byzantine fault-tolerant state-replication protocol that requires a single Vote round per Proposed Block, and achieves exact-lineage finality in just two additional Blocks. The protocol records both Block-lineage causality and each Validator's endorsement order through a dual-linked Vote chain. Notably, earlier Votes are neither revoked nor reassigned; every subsequent Vote must prove that it targets a strictly better proposal.\n\nFor a Block to be considered valid, the Validator set must reach a strict supermajority, which is defined as more than two thirds of the total Stake. Q1 represents the strict-supermajority Vote pass that establishes the QuorumBlock. Q2 is the later, independently deduplicated strict-supermajority Vote pass responsible for setting the CoveredBlock. Q2 starts out empty after Q1 concludes its operations.\n\nIt is important to note that a Validator counted in Q1 may also count in Q2, but only through a different, later Vote carried by a different descendant Block. Proposal admission is parameterized independently of finality, meaning that the protocol allows for a lower endorsement threshold. When the Validator set remains unchanged and the endorsement threshold is at least two thirds, the genesis block reaches QuorumBlock in Block 2 and CoveredBlock in Block 3. In the steady-state pipeline, there is a one-Block lag between the two.\n\nWhile proposal admission can employ a lower threshold, it is crucial to remember that every accepted Block must still advance the lineage toward strict-supermajority finality.",
  "summary": "Tsampi BFT is a leaderless Byzantine fault-tolerant state-replication protocol with one Vote round per Proposed Block and exact-lineage finality in as few as two later Blocks. Its dual-linked Vote chain records both Block-lineage causality and each Validator's endorsement order. Earlier Votes are neither revoked nor reassigned; every successor must prove that it targets a strictly better…",
  "key_points": [
    "Tsampi BFT is a leaderless Byzantine fault-tolerant protocol",
    "Achieves exact-lineage finality in two additional Blocks",
    "Requires strict supermajority (over two thirds) for Block validity"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}