OpenChainGraph Suite · ART-492 · Settlement Finality

Settlement Finality Classifier

Classifies a settlement position under one of three settlement models: an optimistic challenge window, a validity proof, or single-slot BFT consensus. Each model has its own tier ladder and the ladders are never merged, because a posted batch on an optimistic rollup and a committed batch on a validity rollup are not the same claim. If a counterparty asserts a higher tier than the evidence supports, the claim is flagged as overstated.

See also: for ledger-consensus models with terminal-branch or bidirectional outcomes rather than a single tier ladder, such as XRPL or Stellar, use the Ledger Consensus Finality Classifier instead.

Vendor Neutral Parameters Only, No Chain Table Deterministic, No Clock
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Settlement Position
Settlement model
Chain label (free text, echoed)
Free text only. This tool holds no chain list and no published window table, so it cannot go stale when a network changes or shuts down.
as_of_ts (epoch seconds, caller supplied)
The kernel never reads a clock. Evaluation time is an input so the result is reproducible.
Required tier (corridor policy cutoff)
Claimed tier (optional, what a counterparty asserts)
Optimistic Challenge Parameters
assertion_created_at
challenge_window_seconds
batch_posted
Validity Proof Parameters
batch_committed_at
proof_submitted_at
proof_accepted
l1_finalized
l1_finality_seconds
expected_proof_cadence_seconds (optional)
Validity-proof finality is two gates, not a timer: the proof must be accepted and the settlement-layer block carrying it must be finalised. The state between those two gates is reported as proven_unfinalized.
Single-Slot BFT Parameters
included_in_block
quorum_committed
quorum_pct_of_stake (optional)
There is no challenge window and no reorg tier on this model. Settlement risk does not vanish, it moves to cross-chain message trust and validator-set governance.
Classification Detail
Rationale
    Execution Hash (SHA-256)
    See also

    ART-321 BoLD Challenge-Window Finality Classifier classifies an optimistic challenge window on one named deployment. ART-290 Linea L2 Finality Window Check covers a validity rollup with a three-state model. Both remain live and continue to resolve, so receipts they produced stay verifiable.