# 7.2 Soulbound NFT

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Unique system of non-transferable NFT tokens linked to the participant's account in the Nava DAO ecosystem.

*Upon registration, each user automatically receives a personal NFT that cannot be sold or transferred to another participant. This approach guarantees the authenticity of digital identity and prevents account trading.*&#x20;

The token's metadata dynamically reflects the user's current level and accumulated rating in the ecosystem. The reveal mechanism allows the NFT's visual design to be hidden until the official launch, and then revealed to all participants. The contract is integrated with the Nava X contract to obtain up-to-date data on user achievements. Only the central contract is allowed to mint new NFTs, which prevents unauthorized token creation. The ERC721 standard ensures compatibility with popular wallets and marketplaces for viewing the collection. The updatable UUPS architecture allows the functionality of NFTs to be expanded as the ecosystem develops.

**Nava NFT** is a programmatically-generated utility NFT token issued under the NavaX program. The token implements a core utility function: its metadata updates dynamically based on user activity within the personal account and through interactions with the Nava ecosystem products.

The token's functional properties include automatic **Level** increases based on the user's investment volume, number of reinvestments, and other targeted actions. Leveling up grants access to enhanced features and privileges within other Nava ecosystem products.

#### **Use Cases:**

* **Nava SALE:** The sale's smart contract is integrated with the Nava NFT contract and performs on-chain reading of the NFT metadata. Based on the Level and allocation parameters bound to a specific NFT, the user is granted the right to purchase tokens up to the allocation limit corresponding to their NFT.
* **Nava Lottery:** The NFT Level directly affects the user's participation rights and bonuses:
  * **Level 3–5** — grants entry into the super-game.
  * **Level 6–8** — grants entry into the super-game and adds a **+1 bonus** to the final dice roll sum.
  * **Level 9–10** — grants entry into the super-game and adds a **+2 bonus** to the final dice roll sum.
  * **Premium ticket** — grants entry regardless of NFT ownership and adds a **+1 bonus** to any final sum.

**Calculation Example:**\
A user owns a Level 9 NFT and a Premium ticket. If the dice roll sum is 12, the final value will be:\
`12 (dice) + 2 (Level 9 bonus) + 1 (Premium ticket bonus) = 15`.

Thus, the Nava NFT implements a flexible **on-chain mechanism** for tracking user activity and provides extended access rights and advantages across various products within the Nava ecosystem.

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