Exact

Exact Union RegExp

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Transaction Science 29ee437557 mesh: a cut journal is caught by the receipts the steward handed out, and the receipt chain survives a restart ... After #301 the journal re-established spend on restart, but nothing could tell whether records had been cut from its end. Removing a serve's records restored the grant's spend and unspent its presentation, so the captured presentation could be replayed. Separately, a restarted steward began a new receipt chain at sequence 0. - The journal is one chain of records `{seq, prev, entry}`, `prev` being the BLAKE3 hash of the previous record's encoding. A record removed from the middle, edited or moved fails the replay. Only a cut from the end leaves a whole chain. - Every receipt, granted or not, gets a `Sealed` record (its sequence and envelope id), written before the receipt is handed out. `ReceiptLog::seal_next` / `advance` split sealing from advancing, so a receipt that cannot be recorded is not handed out and the chain does not pass it. - On restart the receipt chain continues from the last `Sealed` record (`ReceiptLog::resume`) instead of starting over at 0. - `Mesh::witness(receipt, envelope)`: anyone holding a receipt the steward sealed can show it. If the journal does not hold that receipt, records were cut after it left, so the steward returns `JournalCut` and refuses every grant from then on. A witness that is not the steward's own unaltered receipt is `WitnessInvalid`. - SPEC §2.2, §6.3, §7 and §8 describe it. That includes what remains: a cut that removes only an in-flight serve, which produced no receipt, leaves no evidence outside the steward. Checked on the build host: - mesh-rs: 77 tests pass, four of them new. They cover a receipt proving a cut, chain continuity across a restart, a record removed from the middle or edited, and a foreign or altered witness. The existing journal tests now count seal records. - Every `mesh/1` vector is byte-identical, every Cargo.lock is current, and clippy is clean. - Mutations each fail tests: a witness that always passes, a detected cut that is ignored, seals not recorded, no chain check, and a chain not resumed. Co-Authored-By: Claude Opus 5.5 <[email protected]>		2026-10-17 17:13:58 -04:00
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src	mesh: a cut journal is caught by the receipts the steward handed out, and the receipt chain survives a restart	2026-10-17 17:13:58 -04:00
Cargo.toml