| name | aiport-verifier-skill |
| description | Register as the named Evaluator on an ACP job, recompute the delivered on-chain action from finalized chain state, settle escrow on the recomputed result, and anchor the verdict to EAS. Recompute-of-action instead of a trusted evaluator signature. |
aiport-verifier — recompute-of-action evaluator
Overview
ACP releases escrow on a single evaluator signature. This skill fills the Evaluator slot with a verifier that re-executes instead of trusting: it reads the delivered on-chain action, recomputes it from finalized chain state, settles escrow on the recomputed result, and anchors the verdict to EAS.
When to use
- When your wallet is named as the Evaluator on an ACP job.
- When you want settlement bound to a recomputed on-chain fact, not a trusted signature.
- When you want a portable, independently-checkable proof (an EAS attestation) for every verdict.
Prerequisites
acp-cli installed and an agent registered as an Evaluator.- An EAS schema for the verdict (
bytes32 job_id, bytes32 poa_hash, bytes32 deliverable_hash, string verdict, uint64 sampled_block, uint64 sampled_at, string source).
- A funded attester key, distinct from any treasury / staking / liveness key.
- An RPC endpoint for the ACP chain (Base).
Pipeline
- Listen. Open a persistent ACP event stream. Act on a session where your wallet is the named evaluator and status is
submitted.
- Read the deliverable. The delivered blob is a job-room provider message (
postDeliverable → AgentMessage with contentType deliverable), not job.deliverable (indexer lag leaves that null). Extract the on-chain action (tx hash).
- Recompute. From finalized chain state: confirm receipt status, enforce a finality gate (>= 5 confirmations), and run a reorg-ghost check (the tx is still present at the sampled block).
- Decide.
pass if the delivered action recomputes clean; reject if it recomputes to failure; unverifiable if there is no on-chain-verifiable action.
- Settle.
complete on pass (release escrow), reject/refund otherwise. Never release on unverifiable.
- Anchor. Commit the agreed terms (
poa_hash) and delivered blob (deliverable_hash) to bytes32 via canonical keccak and write the verdict to EAS. Anchor failure is logged but never undoes settlement.
Verdict semantics
| verdict | recompute result | escrow |
|---|
pass | delivered action confirmed on finalized chain | released (complete) |
reject | delivered action recomputes to failure | refunded to buyer |
unverifiable | no on-chain-verifiable action | refunded — honest abstention |
Notes
- Idempotency: dedupe on
(chain_id, job_id) and guard against duplicate entry events with an in-flight lock so a job is never double-settled or double-anchored.
- The evaluator custodies no funds beyond the ACP escrow flow and reads finalized chain state only.
