Space NFT

:::note Optional layer This page describes the Solana layer. It keeps working and is frozen for new features. Nothing in Ekza's main path requires it: creators publish, games approve and players play with an email account. Solana adds public proof of ownership, limited editions and trading. See Architecture. :::

A Space is a virtual room, scene, world, game area, or collaborative creative zone represented by a Solana NFT and a PDA with editable settings.

It is not just an image NFT. The NFT proves ownership, while the PDA stores configuration that can point to an IPFS manifest for the actual Space content.

Program

Repository:

solana-ekza-space

Program:

solana_ekza_space
Bms233NNbKb5FAcsjCmmCAU98oCuBXwLrLXNE5sBRdbb

Accounts

Config

Seed:

["config"]

Fields:

Field	Meaning
authority	Config authority.
treasury	SOL recipient for Space mint payments.
total_spaces	Maximum number of Spaces.
minted_spaces	Number of minted Spaces.
price_lamports	Mint price.
collection_mint	Optional collection mint or default pubkey.
bump	PDA bump.

Space

Seed:

["space_v1", config_pubkey, space_id_le_bytes]

Fields:

Field	Meaning
space_id	Unique ID from 1..=total_spaces.
mint	NFT mint representing the Space.
owner	Owner of Space settings, synced with NFT holder on owner update.
name	Human-readable Space name, max 64 bytes.
space_config_uri	Off-chain config URI, max 512 bytes.
is_open	Whether other users can enter.
is_editable_by_others	Whether non-owners may update shared state.
editors	Explicit editor allowlist, max 10 pubkeys.
bump	PDA bump.
reserved	Reserved bytes for future extensions.

Instructions

init_config

Initializes the global Config PDA.

Arguments:

• total_spaces: u32
• price_lamports: u64
• treasury: Pubkey
• collection_mint: Option<Pubkey>

update_config

Updates mutable config fields. The signer must be the config authority.

Arguments:

• new_price_lamports: Option<u64>
• new_treasury: Option<Pubkey>

mint_next_space

Mints a Space NFT and creates its Space PDA.

Behavior:

1. Validates capacity and space_id.
2. Transfers mint payment to treasury when price is non-zero.
3. Creates a mint with zero decimals.
4. Creates the payer ATA.
5. Mints exactly one token.
6. Creates canonical Metaplex metadata.
7. Revokes mint authority.
8. Initializes Space PDA settings.
9. Emits SpaceMinted.

Arguments:

• space_id: u32
• uri: Option<String>

If uri is not provided, metadata defaults to:

https://meta.ekza.space/spaces/{space_id}.json

update_space_settings

Updates Space settings.

The signer must provide a token account holding one NFT for the Space mint. Settings access is split:

Field	Who can update
name	NFT owner only.
is_open	NFT owner only.
is_editable_by_others	NFT owner only.
add_editor	NFT owner only.
remove_editor	NFT owner only.
space_config_uri	NFT owner, editor, or any signer when shared editing is enabled.

This lets a Space owner keep authoritative ownership while allowing shared room state updates for collaborative worlds.

Space Config URI

space_config_uri should point to a JSON manifest describing the Space:

{
  "schema": "ekza.space.config.v1",
  "name": "Studio Room",
  "scene": "ipfs://bafy.../scene.glb",
  "spawn": [0, 1.7, 0],
  "assets": [
    {
      "assetId": "stellar:release:...",
      "role": "environment",
      "uri": "ipfs://bafy.../asset-manifest.json"
    }
  ],
  "permissions": {
    "open": true,
    "editableByOthers": false
  }
}

The NFT proves ownership. The manifest describes the world.