Cassette Summer

1// SPDX-License-Identifier: MIT
2pragma solidity ^0.8.27;
3 
4import {IEAS} from "./interfaces/IEAS.sol";
5import {IPAssetAuth} from "./IPAssetAuth.sol";
6 
7/// @notice Tracks transferable rights and their on-chain ownership history.
8/// @dev Each right is identified by a deterministic rightId derived from
9///      keccak256(recordId, rightType). Right types match the music-rights
10///      schema enum: 0 master_economic_interest, 1 catalog_administration,
11///      2 publishing_administration, 3 neighboring_rights, 4 sync_clearance,
12///      5 mechanical_administration.
13contract RightsRegistry {
14    IEAS public immutable eas;
15    IPAssetAuth public immutable auth;
16 
17    struct Right {
18        address currentOwner;
19        bytes32 subLabel;
20        uint8 rightType;
21        uint64 lastTransferAt;
22        bool exists;
23    }
24 
25    mapping(bytes32 => Right) public rights;
26 
27    event RightRegistered(
28        bytes32 indexed rightId,
29        bytes32 indexed subLabel,
30        uint8 indexed rightType,
31        address initialOwner,
32        bytes32 attestationUID
33    );
34 
35    event RightsTransferred(
36        bytes32 indexed rightId,
37        address indexed from,
38        address indexed to,
39        uint8 rightType,
40        bytes32 attestationUID,
41        uint64 timestamp
42    );
43 
44    /// @notice Compute the deterministic right ID for a (recordId, rightType).
45    function rightIdOf(string memory recordId, uint8 rightType) public pure returns (bytes32) {
46        return keccak256(abi.encodePacked(recordId, rightType));
47    }
48 
49    /// @notice Register a right for the first time. Caller must hold
50    ///         ROLE_REGISTER for the sub-label; attestationUID references the
51    ///         MUSIC_RECORDING_v1 attestation for the underlying recording.
52    function registerRight(
53        string calldata recordId,
54        bytes32 subLabel,
55        uint8 rightType,
56        address initialOwner,
57        bytes32 attestationUID
58    ) external returns (bytes32 rightId) {
59        require(auth.canRegister(msg.sender, subLabel), "RightsRegistry: not authorized");
60        require(rightType <= 5, "RightsRegistry: bad rightType");
61        _verifyAttestationExists(attestationUID);
62 
63        rightId = rightIdOf(recordId, rightType);
64        require(!rights[rightId].exists, "RightsRegistry: already registered");
65 
66        rights[rightId] = Right({
67            currentOwner: initialOwner,
68            subLabel: subLabel,
69            rightType: rightType,
70            lastTransferAt: uint64(block.timestamp),
71            exists: true
72        });
73 
74        emit RightRegistered(rightId, subLabel, rightType, initialOwner, attestationUID);
75    }
76 
77    /// @notice Transfer a right. Caller must be the current owner. The
78    ///         attestation must be a RIGHTS_TRANSFER_v1 with both signatures.
79    function transferRight(bytes32 rightId, address to, bytes32 attestationUID) external {
80        Right storage r = rights[rightId];
81        require(r.exists, "RightsRegistry: unknown right");
82        require(msg.sender == r.currentOwner, "RightsRegistry: not current owner");
83        _verifyAttestationExists(attestationUID);
84 
85        address from = r.currentOwner;
86        r.currentOwner = to;
87        r.lastTransferAt = uint64(block.timestamp);
88 
89        emit RightsTransferred(rightId, from, to, r.rightType, attestationUID, uint64(block.timestamp));
90    }
91 
92    function ownerOf(bytes32 rightId) external view returns (address) {
93        require(rights[rightId].exists, "RightsRegistry: unknown right");
94        return rights[rightId].currentOwner;
95    }
96}