Registry (Basic)

Registry is a basic Smart Contract for registering accounts and devices, storing metadata URLs and device information. It is suitable for use cases that require a simpler structure than EDHAccountRegistry.

Data Structures

struct AccountRecord {
    string metadataUrl;   // Account metadata URL
    uint timestamp;       // Registration timestamp
}

struct DeviceRecord {
    uint256 deviceId;     // Device ID
    bytes32 deviceName;   // Device name (keccak256 hash)
    string metadataUrl;   // Device metadata URL
    uint timestamp;       // Registration timestamp
}

Events

event AccountRegistered(address id, uint timestamp);
event DeviceRegistered(address id, uint256 deviceId, uint timestamp);

Functions

Interface: Registry

contract Registry {

    // Register an account with a metadata URL (owner only)
    function registerAccount(string memory metadataUrl) public onlyOwner;

    // Register a new device (owner only)
    function registerDevice(
        uint256 deviceId,
        string memory deviceName,
        string memory metadataUrl
    ) public onlyOwner;

    // Read account metadata URL
    function getAccount() public view returns (string memory);

    // List all devices
    function getDevices() public view returns (DeviceRecord[] memory);

    // Get device information by deviceId
    function getDeviceInfo(uint256 deviceId) public view returns (DeviceRecord memory);
}

registerAccount : Registers an account with a metadata URL. Each address can only register once. Can only be called by the contract owner.

registerDevice : Adds a new device to the account. The device name is hashed with keccak256 to prevent duplicate names. Each device has a deviceId, deviceName, and metadataUrl.

getAccount : View function for reading the current account's metadata URL.

getDevices : View function for listing all devices of the account.

getDeviceInfo : View function for looking up device information by deviceId.

Comparison with EDHAccountRegistry

Feature	Registry (Basic)	EDHAccountRegistry
PKI (Public Key Infrastructure)	None	Yes — stores encryption public keys
Multi-Device Wallet	None	Yes — EDHAccount is a multi-owner wallet
Data Storage	Metadata URL	On-chain public keys + SeedVault
Access Control	Owner only	All active devices
Meta-Transaction (ERC-2771)	Not supported	Supported
End-to-End Encryption	None	Yes — via NaCl key exchange
Suitable For	Systems requiring a simple structure	Full EDH system

ヒント

For full EDH platform usage, it is recommended to use EDHAccountRegistry, which supports end-to-end encryption, multi-device management, and meta-transactions.

See Also

• Account — Full EDHAccountRegistry and EDHAccount