Overview

The IdentityRegistry is a Solidity smart contract (^0.8.20) that provides a minimal, gas-efficient system for mapping identity labels to ENS names and IPFS content identifiers.

Key Features

• Multi-owner whitelist access control system
• Mapping of human-readable labels to identity records
• Each identity record contains: owner address, ENS name, IPFS CID, and timestamp
• Functions for setting, reading, and revoking identities

Contract Structure

Error Handling

• NotAuthorized(): Thrown when unauthorized access is attempted
• ZeroAddress(): Thrown when zero address is provided
• EmptyCID(): Thrown when empty IPFS CID is provided
• SameValue(): Thrown when attempting to set a value that's already set

Data Structures

struct Identity {
    address owner;     // controller of this identity record
    string ensName;    // e.g. "keccake256.eth"
    string ipfsCid;    // e.g. "ipfs://bafybe..."
    uint256 updatedAt;
}

State Variables

• mapping(address => bool) public allowedOwners - Whitelist of authorized owners
• mapping(bytes32 => Identity) private identities - Maps hashed key labels to Identity structs

Events

• IdentitySet - Emitted when an identity is created or updated