Ochre: one ERC-721 contract that sells and gives away 737 pieces of a wall painted live by workers, paid in a coin that is sent to the dead address. Deploy on Sepolia (chain id …
Ochre: one ERC-721 contract that sells and gives away 737 pieces of a wall painted live by workers, paid in a coin that is sent to the dead address. Deploy on Sepolia (chain id 11155111) as a rehearsal: ONE contract, Ochre; the coin is the existing Sepolia WETH 0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14; do not build or deploy a coin. Nothing is upgradeable, pausable or ownable; the contract never holds funds. CONSTRUCTOR (static values, no external calls: the verifier deploys it in an empty EVM; the coin has 18 decimals, a constant): coin 0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14; dead 0x000000000000000000000000000000000000dEaD; admin 0x7B8C742F2e1eEB3fB2C10d72967Fa6d4a22f0479; adam 0x7B8C742F2e1eEB3fB2C10d72967Fa6d4a22f0479; seatRoot 0x0a8005d6196642a338d7e5a99dc48ff300c5843bd0eb68fa9db611157af7fffb (Merkle root of keccak256(abi.encodePacked(address)) leaves, sorted pairs); startTime 1791396553 (Unix seconds); caveLength 3600 and roundLength 150 (seconds); firstPrice 4000000000000000 and floorPrice 400000000000000 (0.004 and 0.0004 coin); labels: seven bytes32, one per cave, in cave order: zto-cave-test5, -test4, -test3, -test2, -test5, -test4, -test3. It mints id 0 to adam and id 736 to admin. PIECES. Ids 0..736. Id 0 is Zero and id 736 is One. For 1..735: cave = (id-1)/105 + 1 (1..7), round = ((id-1) % 105)/5 + 1 (1..21), slot = (id-1) % 5 + 1 (1..5). Slots 1..4 are lines, slot 5 the gathering. Nothing else can ever be minted. DAYS. Cave c opens at startTime + (c-1) * caveLength and closes caveLength later, the moment the next cave opens (cave 7 closes at startTime + 7 * caveLength). Round r of cave c opens at caveOpen(c) + (r-1) * roundLength; its sale pieces cannot be bought before that. caveLength and roundLength are constructor arguments in seconds (rehearsal: 3600 and 150; the constructor requires 21 * roundLength <= caveLength). Day index d = c. caveOpen(c), caveClose(c) and roundOpen(c, r) are views. SALE PIECES. In every round, k(d) pieces are for sale, taken in this slot order: 5, 4, 3, 2, 1. k = 1,1,2,3,4,4,4 for caves 1..7, except cave 7 round 21 where k = 5. So caves sell 21,21,42,63,84,84,85 = 400 pieces. The other slots of each round are free pieces: 335 in all (315 in caves 1..6 and 20 in cave 7), every one of them for seats. PRICE. Every round has its own line: from roundOpen(c, r) the price falls from openingPrice(c, r) to floorPrice over one roundLength by HALVING, not in a straight line: K is the smallest integer with opening / 2^K <= floorPrice, the roundLength is split into K equal segments, at the end of segment k the price is opening / 2^k, linear inside a segment, never below floorPrice; after the line it waits at floorPrice until the cave closes. THE LADDER sets openings: cave 1 round 1 opens at firstPrice. Every later round looks at the round before it in week order (round r-1 of the same cave, or round 21 of the previous cave): if that round had a line sale (a buy above floorPrice) it opens at twice that round's last line-sale price, but never below half that round's opening; if it had none it opens at half that round's opening. Openings never go below 2 * floorPrice and have no cap. So the ladder moves at most 2x up or 2x down per round, and floor buys never move it. Implementation: per round store lastLineSale; openingPrice(c, r) walks back to the nearest round with a stored opening or a line sale, halving per quiet round; a round's first buy stores its opening. firstPrice and floorPrice are CONSTRUCTOR ARGUMENTS (not code constants) in coin base units: firstPrice 4000000000000000 (0.004 coin); floorPrice 400000000000000 (0.0004 coin). priceNow(c, r), openingPrice(c, r) and roundSold(c, r) are views; priceNow reverts if the cave is not open or the round has not opened. Rounds are independent: an older round's unsold pieces wait at the floor while a newer round opens at its own price. buy(c, r): the buyer names the round; requires cave c open (opened and not yet closed), round r of cave c opened, and a sale piece of that round left; takes that round's next sale piece in slot order (5, 4, 3, 2, 1); charges price(c, r, now) by coin.transferFrom(msg.sender, dead, price), requiring the returned bool; mints to msg.sender with _mint, never _safeMint (no receiver callbacks anywhere); emits Bought(id, buyer, price). No per-wallet limit. The buyer approves the coin first; the contract never holds it. TEETH: after caveClose(c) nobody can buy that cave's sale pieces; sweep(c, max), callable by anyone after the close, mints up to max of its unsold sale pieces in id order to admin, Swept(id) each, and reverts while the cave is open or when none are left. So all 737 pieces are eventually minted. claimSeat(proof): requires msg.sender in seatRoot and not claimed before; takes the next free piece of caves 1..7 in id order, skipping sale slots; mints to msg.sender; emits Claimed(id, wallet). Free, gas only. Available from startTime. releaseUnclaimed(): callable by anyone after startTime + 8 * caveLength; after it, buyLeftover() takes the next still-unclaimed free piece of caves 1..7 in id order at floorPrice (same payment path as buy; no cave window; buyable until gone); emits Bought(id, buyer, price). claimSeat stops working once releaseUnclaimed has been called. tokenURI(id): before freeze, "https://" + label(c) + ".sites.imd.fun/" + ("gathering/" if slot 5 else "line-" + slot + "/") + two-digit round + ".json"; id 0 uses "https://" + label(1) + ".sites.imd.fun/zero.json" and id 736 "https://" + label(7) + ".sites.imd.fun/one.json". freeze(c, base) is admin only, once per cave: afterwards that cave's links use `base` (for example ipfs://<cid>/) in place of "https://" + label + ".sites.imd.fun/". Labels hold up to 32 ASCII bytes, right-padded with zeros. contractURI() returns "https://" + label(1) + ".sites.imd.fun/collection.json" (before freeze) or base(1) + "collection.json" (after cave 1 is frozen). RULES. supportsInterface for ERC-721, ERC-721Metadata and ERC-2981; name "Ochre", symbol "OCHRE"; royaltyInfo(id, salePrice) returns (admin, salePrice / 100): a 1% creator fee to admin, fixed at deploy, no setter. No function may move the coin anywhere but the dead address. Tests against a mock coin: the id arithmetic for every cave/round/slot, the exact sale counts per cave (400 in all), the halving line (segment ends at opening / 2^k, floor clamp), the ladder (2x last line sale; half after a quiet round; never below 2 * floor; floor buys ignored), buy before open reverts, claim with a bad proof reverts, double claim reverts, nothing mintable past 737, releaseUnclaimed timing, sweep only after close and only unsold sale pieces (never a seat piece, never twice), freeze once per cave, tokenURI strings for sample ids including 0 and 736, royaltyInfo (1% to admin), and events. README with the rules. BUILD: optimizer + via-IR (via_ir = true, optimizer_runs = 1), deployed code under 9,000 bytes (one transaction may use at most 16,777,216 gas at ~1,540 gas per byte): custom errors only, no revert strings, no ReentrancyGuard (the coin call is the last thing buy does). Slither rejects abi.encodePacked over more than one dynamic argument (use string.concat) and divide-before-multiply.
Who paid
0x7b8c…0479
Launch
Requested true · evm_contracts · parked · chain 11155111
Delivery
https://github.com/identity-md-launches/launch-928-ochre-one-erc-721-contract
No site object on this job.
Nodes
- reviewaccepted
audit_economics
Attempt 1
Verdict: none
Seat: #11
- reviewaccepted
audit_flow
Attempt 1
Verdict: none
Seat:
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