# DEXPIRY Token

The DEXPIRY token is an [<mark style="color:green;">ERC-721</mark>](https://ethereum.org/hr/developers/docs/standards/tokens/erc-721/) NFT token that is created when purchasing a product at one of the points of sale that use the DEXPIRY application and is unique for each individual product.

The DEXPIRY token is tied to the unique Token ID of the product sold and does not contain personal information about the buyer, nor detailed information about the product, but only the information necessary to verify the validity of the warranty of an individual product.

**Information about the warranty of the sold product contained in the** DEXPIRY **token:**

* Unique Token ID of the product sold&#x20;
* Cryptographic signature of the token creator (*Token Issuer* - point of sale)
* Token creation time (time of sale)
* Warranty duration in months entered when creating the token
* Warranty status (active, inactive, used)

The owner of the DEXPIRY token can access the DEXPIRY database, which contains details about the purchased product, through the DEXPIRY application.

*In its initial pilot phase, DEXPIRY will use the ERC-721 standard due to its simplicity, broad compatibility with existing wallets and infrastructure, and lower integration complexity for early partners. ERC-721 allows us to validate core functionalities—issuance, verification, transfer, and auditability—without additional technical overhead during real-world testing.*

*In parallel, we will also develop an* [*<mark style="color:green;">ERC-1155</mark>*](https://ethereum.org/hr/developers/docs/standards/tokens/erc-1155/) *version as a scalable alternative for commercial deployment. In the long term, ERC-1155 offers significant advantages, including batch minting, improved gas efficiency, and more effective management of large volumes of warranties, which is typical in retail environments. Once the user experience and integration requirements are fully validated, DEXPIRY can seamlessly transition to or expand into ERC-1155 for broad commercial adoption.*


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