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Caldera

Hotel matchbook PFPs

Marketplace

Launch on OpenSea, Robinhood Chain.

Caldera ships as layered APNG traits and as flattened GIF tokens. OpenSea wants the GIF bake of those loops. The mint is $0.25. The APNG stack stays in this repo for the studio and any later restack.

OpenSea · Robinhood Chain
Network
Robinhood Chain
Chain ID
4663
Currency
ETH
Supply
10,000
Mint
$0.25

Project description

Paste this into OpenSea.

Collection name Caldera. Symbol CALD. Category PFPs. The same copy lives in public/metadata/caldera-description.txt.

Caldera.

A 10,000-piece collection of looping hotel-matchbook PFP GIFs on Robinhood Chain. Each book is stacked from seven plates — cloth, sleeve, inn, comb, strike, flame, and mark — then flattened onto one 12-frame GIF. Eight inns: cactus, lodge, diner, buoy, crown, shield, palm, and ticket. The print is cardboard. The flame is the loop.

A souvenir matchbook on a cafe cloth, not a tin toy. Not a snow globe. Not neon tubing. No sticker edge. No egg. Not a shadow puppet. Not a fold. The book stays seated on one envelope. The strike is the flame. One shared clock.

Minting at $0.25 on Robinhood Chain (chain ID 4663). Gas is ETH.

Listing kit

Logo, featured, banner, collection GIF.

OpenSea wants a square logo, a 3:2 featured image, and a wide 4:1 banner — three different pictures, no type on the marketplace images. The site hero can reuse the taller banner.

  • Logo preview

    Logo

    512×512, 1:1

    public/brand/logo-caldera.png

  • Featured preview

    Featured

    1200×800, 3:2

    public/brand/featured-caldera.jpg

  • OpenSea banner preview

    OpenSea banner

    2800×700, 4:1

    public/brand/banner-caldera-opensea.jpg

  • Collection GIF preview

    Collection GIF

    1000×1000 loop

    public/brand/collection-caldera.gif

Wallet setup

RPC https://rpc.mainnet.chain.robinhood.com
Explorer https://robinhoodchain.blockscout.com

  1. 1

    Traits stay layered. The drop is flattened.

    OpenSea does not stack APNG layers for you. Studio is a live compositor. For a Drop you upload finished GIFs plus a CSV. Bake the full 10,000-token pack with python scripts/generate_caldera.py --all — gifs/, CALDERA-opensea-drop.csv, and the kit README land in generated/caldera/.

  2. 2

    Create a Drop on Robinhood Chain

    In OpenSea Studio, create a Drop on Robinhood Chain (chain ID 4663). Set supply to 10,000, set mint to $0.25, paste the project description, and upload the listing kit from public/brand.

  3. 3

    Bulk-upload GIFs + CSV

    Upload every file in generated/caldera/gifs (1.gif–10000.gif) and generated/caldera/CALDERA-opensea-drop.csv. The CSV already uses OpenSea’s required headers (tokenID, name, description, file_name, attributes[Trait]). OpenSea plays GIF, not APNG. Preview the loops, then publish.

  4. 4

    Or deploy the ERC-721 yourself

    contracts/Caldera.sol mints token IDs 1–10,000 at 0.0001 ETH (about $0.25; owner can retune the wei amount). Pin generated/caldera/json and set the base URI. Import that contract on OpenSea instead of using a Drop if you want a custom mint. Gas is ETH.

Drop upload notes: Preparing metadata for your drop. Live collections: Robinhood Chain. OpenSea on Robinhood Chain: Robinhood Chain is live on OpenSea.