BoLD Challenge-Window Finality Classifier

Robinhood Chain is Arbitrum Orbit with BoLD interactive fraud proofs. Settlement inside the roughly week-long challenge window is optimistic, not final. This node classifies a finality claim as soft, posted, challengeable, or final, and flags claims of final finality made while the challenge window is still open. Client-side. Zero PII.

Policy Mandate Export Arbitrum BoLD Robinhood Chain settlement_finality_mandate Proof verified

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L2 / L1 state

L2 inclusion timestamp (unix seconds)

Batch posted to L1

BoLD assertion created

Assertion created timestamp (unix seconds)

Challenge window seconds

Current time (unix seconds)

Claim under test

Finality claim

Finality classification

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See also

This classifier is pinned to one named deployment and to the BoLD interactive fraud-proof model. ART-492 Settlement Finality Classifier is the vendor-neutral equivalent: it takes the challenge window and the settlement parameters as inputs rather than assuming a deployment, and it carries separate tier ladders for optimistic challenge windows, validity proofs and single-slot BFT consensus. Use ART-492 when the deployment is not fixed in advance. This page stays live and unchanged, so receipts it has already produced remain verifiable.