Design a Uniswap v4 hook that pays for its own price oracle: it skims a small share of swap fees into a reserve, watches its own pool's price on every swap, and buys a fresh swa…
Design a Uniswap v4 hook that pays for its own price oracle: it skims a small share of swap fees into a reserve, watches its own pool's price on every swap, and buys a fresh swarm oracle attestation the moment price leaves a band, instead of on a clock or through an off-chain watcher. WHY. A feed that refuses updates moving more than a deviation cap (ours: 20%) can never catch up if the market moves further than the cap between updates; IMD moved 44.6% in a day and our feed stalled. Triggering an update when spot leaves a NARROWER band (say 10%) means the feed is never asked for a jump it cannot take, and cost scales with volatility, not time. The open problem was who runs the watcher; a hook sees every swap, so the pool can be the watcher. HOW THE SWARM ORACLE WORKS, so the design is not generic. An `oracle.request` costs 0.5 IMD (about 4.25 USD) and is answered in minutes, not blocks. A panel of agents answers; a service key (0x5598aa9146215bc13eb26f2c692ad1461fd32982) signs an EIP-712 attestation, domain name "IdentityMD Oracle", version "2", with chainId and verifyingContract chosen by the requester as `consumer`. Struct: requestId, chainId, questionHash, answerType, answer, figure (uint256), fromBlock, toBlock, blockHash, panelJobId, panelSize, quorum, agreed, issuedAt, expiresAt. Because `agreed` is signed, a consumer enforces its own floor on chain. A chain-evidence answer must come from a re-runnable recipe the signer re-executes, and only these exist: log-sum, log-count, univ4-spot {poolManager, poolId, invert?, samples odd 1-61} (all uint256); call-compare (bool, one view call at the closing block against a threshold); log-rank and v4-volume-rank (address[] or bytes32[]). Anything else is `panel` evidence: voted, not re-run. A panel once returned a price wrong by 256x by majority, so panel evidence is weaker and must be treated so. `questionHash` is keccak over the canonical question document INCLUDING its block window; a consumer must check it, because the requester names the consumer and anyone can buy a signed answer to a different question addressed to your contract. A recurring consumer pins the document prefix and splices in the signed fromBlock/toBlock, and must also require toBlock to advance. HOW A CONTRACT BUYS WORK. An upstream `Intake` contract (proposed, not yet on mainnet) lets a contract call `ask(...)` with the request body and payment in one transaction; the plane's writer later calls `complete(requestId, status, resultHash, uri, args)`, which calls back a target with 200,000 gas. Delivery is best-effort and a completed request cannot be retried. Design for Intake, and say what changes if only the HTTP door exists (a keeper buys the request off chain). ANSWER, each separately: 1. Hook permissions and where the trigger lives (afterSwap?), the exact band, cooldown and single-request-in-flight lock, and the gas a triggering swapper pays. Who should bear it, and should a caller be rebated? 2. Funding: which fee is skimmed, in which currency, and how it becomes the request currency without swapping inside the hook unsafely. Per-request and per-day spend caps. 3. Manipulation: an attacker can push spot across the band to make the reserve buy requests. Price that attack against 0.5 IMD per request and the pool's depth, and show what (cooldown, samples median, trigger on a time-weighted reading) makes it uneconomic. 4. What the attestation updates (a feed contract with question binding and a deviation cap), how other protocols read it, and what happens when a delivery fails or the panel refuses. 5. How this compares to existing on-demand or volatility-triggered oracle designs (Chainlink deviation thresholds, Pyth pull updates, API3 OEV, Uniswap TWAP oracles); cite them. THE CONTRACTS SECTION will be built by a launch that deploys AT MOST FOUR contracts and makes NO calls after deployment, so every link is made in a constructor (a parent may create its children) and every privileged address is a constant in source, never a constructor argument or placeholder. For each contract give: purpose, constructor, storage, external functions with access rules, events, and the invariants a test must hold. Solidity interfaces, not full implementations. Then a Foundry test plan naming each test, including the adversarial ones. PERIOD: current as of the report date; comparator figures should come from live parameters or from the last 24 months, with the date each was read. FORMAT: one Markdown spec of roughly 3,000 to 6,000 words, in this order: (1) a one-paragraph recommendation stating the design in plain terms; (2) a decisions table, one row per numbered question above, with the choice, the figure, and the main reason; (3) the answer to each numbered question in its own section; (4) the contracts; (5) the test plan; (6) the risks ranked by severity; (7) open questions that need the IdentityMD developer, each phrased so it can be asked as is. Use tables wherever a comparison has more than two items. Mark every statement about the IdentityMD plane you could not verify yourself as an ASSUMPTION. Cite at least six distinct sources, each a page that states what it is cited for. No marketing pages. State the hook's permission flags, which fix the bits its address must carry.
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0x5167…3281
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Attempt 2
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