Crank lifecycle: pay at the machine and the charm lands in your wallet, its roll comes from the crank's own block once that block is sealed and is revealed seconds later, then polish it and wear it.

--- title: "Keychains — Le Depanneur" description: "The keychain shop: crank the capsule machine, get a random one-of-one charm. The exact mechanics, the provably fair roll, the money math, and what you actually own." category: "keychains" keywords: ["depanneur", "capsule machine", "crank", "mint", "fair draw", "odds", "royalty", "money"] last_updated: "2026-10-12" --- # Le Depanneur Every Montreal block has one: the corner store with the lotto terminal, the cooler hum, and the capsule machine by the door. PD's is called **Le Depanneur ☯**, and its capsule machine sells exactly one thing: Keychains. **How:** Tap KEYCHAINS ⚷ at the bottom of your PriceSprite card, or the ⚷ key in the wallet settings row. ## One coin, one turn — the exact mechanics There is no picking, no previewing, no quantity stepper — but there IS one choice: the machine has **two coin slots, YIN and YANG**, and the slot you drop your coin in steers the roll's palette, face, and accessory weights (the [overview](/docs/keychains/overview#every-trait-every-odds) tables show both columns). Shapes are universal — the ALIEN odds are identical on either slot. The rules of the machine, all enforced by the contract: - **One crank mints one charm.** You cannot batch cranks in a single transaction. A capsule machine you can empty in one pull isn't a capsule machine. - **The price is exact.** The machine takes precisely its posted price — overpay or underpay and the whole transaction refuses. The price sits in sticker-sheet territory and is tunable the same way sheet prices are, so it holds its dollar target as ETH drifts. - **The machine has a switch.** PD can pause sales; a pause never touches charms already out in the world. - **The charm is yours the instant the crank lands** — the machine keeps turning for the few seconds its roll takes to reveal, then it drops. No separate claim, nothing else to tap. ## The fair roll Keychains use the same fairness engineering as sticker-pack peels: - **The crank commits, the next block reveals.** Your crank pins the charm to the block it lands in; the dice are that block's hash, mixed with the charm's number and the machine's address — chain data that does not exist yet while your crank is running. Once the block is sealed, anyone can record the seed (PD's server does it within seconds; until then the charm shows REVEALING). Nobody — not you, not PD, not a bot watching pending transactions — can know the charm before its block is sealed. - **Nobody can fish for an ALIEN.** The roll doesn't exist yet when you crank: it comes from the crank's own block, which is only sealed after the crank is final. That closes the classic casino exploit — a bot that wraps the crank, checks the result, and cancels unless it hit an ALIEN — for every kind of wallet, with nothing to refuse. - **The odds are public and locked.** Every weight table on the [overview](/docs/keychains/overview#every-trait-every-odds) is the contract's literal source — readable by anyone, identical for everyone, unchangeable forever. - **The roll is frozen forever.** Your charm's genes are stamped at crank and never re-rolled, re-weighted, or "rebalanced." What the machine gives you is what exists. ## The money, exactly Le Depanneur runs on the sticker-shop's rails, to the letter: - **95% to the shop, 5% to the platform**, paid out inside the purchase transaction itself, gone the moment you pay. The one price you see also carries a small **reveal fee** (`revealFeeWei`, 0.0002 ETH at launch), which goes to the wallet that sends your charm's reveal and pays its gas. The machine never holds a balance — there is nothing inside it to hack, drain, or freeze. - **Secondary sales pay a 5% royalty**, split on the same standing terms as everything else on PD — on a $100 secondary sale, $5 flows back. - During the test phase in-app Le Depanneur runs on sim-ETH like the sticker store; the contract is the mainnet machine. ## What you actually own A Keychain is a token in your wallet, and more than most: - **The genes** — shape, palette, material, face, pose, accessory — are yours forever, stamped at crank. - **The art is served by the chain itself.** There is no image host, no metadata server, nothing that can rot or be taken down. Ask the contract for your charm tomorrow or in twenty years; it draws it fresh either time — swing, blink, and all. - **The rolls and the luck** — palette, finish, chain metal, and the Luck your streak bought at the crank — are the charm's own, forever. - **The keeper's record** — the PriceStreak and PriceRank traits that polish writes — belongs to whoever keeps it. See [The Living Charm](/docs/keychains/the-living-charm). ## Trading a charm **How:** Le Depanneur ☯ → tap your charm. Someone else's charm: tap it where it hangs on their profile, or its tile in the Marketplace's Collectibles tab. - **Your charm:** POLISH · LIST at your price (and CANCEL) · ACCEPT an offer · SEND it to an @name or a wallet. - **Someone else's charm:** BUY at the listed price · OFFER your own price (and CANCEL it). Every sale pays the seller 95%; the 5% royalty splits 3% to the shop and 2% to PD, exactly as the contract's royalty does. A charm that changes hands keeps its look, its Luck and its name; its PriceStreak and PriceRank traits reset for the new keeper. ## The one thing to know before you buy secondhand A charm's look never changes hands differently from how it dropped: a GOLD chain or a CHROME finish bought secondhand is still exactly that, and so is its Luck. What resets is the keeper's record — **the PriceStreak and PriceRank traits go back to 0** on every transfer, and the new keeper polishes their own life onto it.