Smart Contract for Dataset Tokenization
Smart contracts are the backbone of dataset tokenization, registering assets on the blockchain for transparency and control. The DatasetToken contract exemplifies this, integrating IPFS and PoSp mechanisms within the EVM pallet:
Contract Structure
Defining Dataset Attributes, Mappings, and Events within the DatasetToken Smart Contract
pragma solidity ^0.8.0; contract DatasetToken { struct Dataset { string cid; // IPFS Content Identifier uint256 size; // Dataset size in bytes address provider; // Data provider's address uint256 timestamp; // Registration timestamp bool isActive; // Status flag }
Purchaser Browsing mapping(uint256 => Dataset) public datasets; uint256 public datasetCount; address public contractOwner; mapping(address => bool) public approvedProviders; uint256 public registrationFee;
Purchaser Browsing event DatasetRegistered(uint256 indexed datasetId, address indexed provider, string cid, uint256 timestamp); event DatasetRevoked(uint256 indexed datasetId, address indexed provider, uint256 timestamp); }
Zero Knowledge Ownership Verification
Tracking Dataset Attributes, Ownership, and Auditability through On-Chain Events
The Dataset struct captures essential attributes: the CID links to IPFS storage, size informs resource requirements, provider identifies the owner, timestamp tracks registration, and isActive indicates availability. State variables track datasets and providers, while events ensure auditability through the event system.
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