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skins package

Overview

v0 - Unaudited: This is an initial version that has not yet been formally audited. Use in production at your own risk.

Package skins is the catalog of plane skins of gnofly, a multiplayer plane game, and the tokens of the skins sold. Every skin bought is a GRC721 token on gno.land/p/nt/grc721/v0, one per buyer and design.

The tokens are soulbound: there is no TransferFrom, no Approve and no SetApprovalForAll, and the token object is not exported, so nothing can move a skin away from its buyer. Its owner can Burn it, which gives back the storage deposit (not the price).

Supply is unlimited by default; an admin can cap a design. Classic, the look every pilot flies by default, is free and is not a token.

Writers:

  • anyone buys a skin with its price attached (Buy), and burns their own (Burn);
  • the admins of the game realm edit the catalog (SetSkin, SetSkinListed).

The realm keeps no roles and no money: admins and treasury are those of gno.land/r/g1t2kg2vtr3fukg43eujkn6x53gfdyakhngt4sfd/gnofly/game/v0, and every sale is forwarded to the treasury in the same transaction.

A token stores only its owner (the ledger), its design and an entry in the buyer's list: no metadata record and no URI. TokenURI is computed from the design. Reads are plain functions meant for vm/qeval: CatalogJSON, SkinsOf, OwnerOf, SkinOf, TokenURI, Render.

Function

SetSkin

func SetSkin(cur realm, id, name, model, pilot, body, wing, accent string, price, maxSupply int64)

SetSkin creates or updates a design. Admin only.

id is [a-z0-9-]{1,32} and not "classic", name [A-Za-z0-9 '.!-]{1,40}, model [a-z0-9-]{1,16}, pilot none or gnome, colours "#rrggbb" in lowercase, price 1 to 1e12 ugnot, maxSupply 0 for unlimited. A max supply under what is already minted stops the sales, it takes nothing back. Owners keep their tokens whatever happens to the design; its look is read from here, so a change of colours repaints every copy.

Params

Command

# WARNING: This command is running in an INSECURE mode.
# It is strongly recommended to use a hardware device for signing
# and avoid trusting any computer connected to the internet,
# as your private keys could be exposed.

gnokey maketx call -pkgpath "gno.land/r/g1t2kg2vtr3fukg43eujkn6x53gfdyakhngt4sfd/gnofly/nfts/skins" -func "SetSkin" -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -chainid "gnoland-1" -remote "https://rpc.gno.land" ADDRESSgnokey query -remote "https://rpc.gno.land" auth/accounts/ADDRESS
gnokey maketx call -pkgpath "gno.land/r/g1t2kg2vtr3fukg43eujkn6x53gfdyakhngt4sfd/gnofly/nfts/skins" -func "SetSkin" -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -broadcast=false ADDRESS > call.tx
gnokey sign -tx-path call.tx -chainid "gnoland-1" -account-number ACCOUNTNUMBER -account-sequence SEQUENCENUMBER ADDRESS
gnokey broadcast -remote "https://rpc.gno.land" call.tx