# DAT Lifecycle Example

<figure><img src="https://lh7-rt.googleusercontent.com/docsz/AD_4nXfSqf8H4pIdgfoD3qQdDZS6n4tsL0_exWI-cjdtUjDsG9xdvuLAk-rFN0e_H5W2-Uf70bQt7CdZ13v4zJAr6pl03tWAIlK1KhdTp25oOsAJcSY8AdDAj6UlYuv5pKUoRx5jS3r3?key=S_AVxe4Pa4t7GMdXHRa1L20C" alt=""><figcaption></figcaption></figure>

#### Step 1: Create Class (AI Asset Category)

`createClass(`

&#x20; `1,`

&#x20; `"Medical Dataset",`

&#x20; `"Open-source dataset for disease classification",`

&#x20; `"ipfs://metadata/med-dataset-class"`

`)`

#### Step 2: Mint DAT Token (Bind & Issue Asset)

`mintDAT(`

&#x20; `user1,`

&#x20; `1,`           // classId: Medical Dataset

&#x20; `1000 * 1e6,`        // value: 1000 (6 decimals)

&#x20; `500,`              // shareRatio: 5%

&#x20; `0`                // expireAt: never expires

`);`

💡 **Option:** Mint multiple DATs to simulate multi-user ownership

#### Step 3: Service Payment (Agent Invocation)

`transferValue(user1TokenId, agentTreasuryTokenId, 100 * 1e6);`

* `agentTreasuryTokenId` may be a treasury contract address
* Supports “pay-as-you-use” or delegated billing models

#### Step 4: Revenue Share Demonstration (Future Extension)

Assume an agent earns 10 USDC:

`agent.payToDATHolders(classId, 10 USDC);`

* Contract calculates each DAT’s shareRatio
* Distributes revenue proportionally

#### Step 5: Token Expiration (Optional)

`require(block.timestamp < dats[tokenId].expireAt, "Token expired");`

Used for subscription-based AI services or time-bound licenses


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