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// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import { EMPTY_UID } from "./Types.sol";
import { ISchemaRegistry, SchemaRecord } from "./ISchemaRegistry.sol";

import { ISchemaResolver } from "./resolver/ISchemaResolver.sol";

/**
 * @title The global schema registry.
 */
contract SchemaRegistry is ISchemaRegistry {
    error AlreadyExists();

    // The version of the contract.
    string public constant VERSION = "0.26";

    // The global mapping between schema records and their IDs.
    mapping(bytes32 uid => SchemaRecord schemaRecord) private _registry;

    /**
     * @inheritdoc ISchemaRegistry
     */
    function register(string calldata schema, ISchemaResolver resolver, bool revocable) external returns (bytes32) {
        SchemaRecord memory schemaRecord = SchemaRecord({
            uid: EMPTY_UID,
            schema: schema,
            resolver: resolver,
            revocable: revocable
        });

        bytes32 uid = _getUID(schemaRecord);
        if (_registry[uid].uid != EMPTY_UID) {
            revert AlreadyExists();
        }

        schemaRecord.uid = uid;
        _registry[uid] = schemaRecord;

        emit Registered(uid, msg.sender);

        return uid;
    }

    /**
     * @inheritdoc ISchemaRegistry
     */
    function getSchema(bytes32 uid) external view returns (SchemaRecord memory) {
        return _registry[uid];
    }

    /**
     * @dev Calculates a UID for a given schema.
     *
     * @param schemaRecord The input schema.
     *
     * @return schema UID.
     */
    function _getUID(SchemaRecord memory schemaRecord) private pure returns (bytes32) {
        return keccak256(abi.encodePacked(schemaRecord.schema, schemaRecord.resolver, schemaRecord.revocable));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISchemaResolver } from "./resolver/ISchemaResolver.sol";

/**
 * @title A struct representing a record for a submitted schema.
 */
struct SchemaRecord {
    bytes32 uid; // The unique identifier of the schema.
    ISchemaResolver resolver; // Optional schema resolver.
    bool revocable; // Whether the schema allows revocations explicitly.
    string schema; // Custom specification of the schema (e.g., an ABI).
}

/**
 * @title The global schema registry interface.
 */
interface ISchemaRegistry {
    /**
     * @dev Emitted when a new schema has been registered
     *
     * @param uid The schema UID.
     * @param registerer The address of the account used to register the schema.
     */
    event Registered(bytes32 indexed uid, address registerer);

    /**
     * @dev Submits and reserves a new schema
     *
     * @param schema The schema data schema.
     * @param resolver An optional schema resolver.
     * @param revocable Whether the schema allows revocations explicitly.
     *
     * @return The UID of the new schema.
     */
    function register(string calldata schema, ISchemaResolver resolver, bool revocable) external returns (bytes32);

    /**
     * @dev Returns an existing schema by UID
     *
     * @param uid The UID of the schema to retrieve.
     *
     * @return The schema data members.
     */
    function getSchema(bytes32 uid) external view returns (SchemaRecord memory);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

// A representation of an empty/uninitialized UID.
bytes32 constant EMPTY_UID = 0;

/**
 * @dev A struct representing EIP712 signature data.
 */
struct EIP712Signature {
    uint8 v; // The recovery ID.
    bytes32 r; // The x-coordinate of the nonce R.
    bytes32 s; // The signature data.
}

/**
 * @dev A struct representing a single attestation.
 */
struct Attestation {
    bytes32 uid; // A unique identifier of the attestation.
    bytes32 schema; // The unique identifier of the schema.
    uint64 time; // The time when the attestation was created (Unix timestamp).
    uint64 expirationTime; // The time when the attestation expires (Unix timestamp).
    uint64 revocationTime; // The time when the attestation was revoked (Unix timestamp).
    bytes32 refUID; // The UID of the related attestation.
    address recipient; // The recipient of the attestation.
    address attester; // The attester/sender of the attestation.
    bool revocable; // Whether the attestation is revocable.
    bytes data; // Custom attestation data.
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { Attestation } from "../Types.sol";

/**
 * @title The interface of an optional schema resolver.
 */
interface ISchemaResolver {
    /**
     * @dev Returns whether the resolver supports ETH transfers.
     */
    function isPayable() external pure returns (bool);

    /**
     * @dev Processes an attestation and verifies whether it's valid.
     *
     * @param attestation The new attestation.
     *
     * @return Whether the attestation is valid.
     */
    function attest(Attestation calldata attestation) external payable returns (bool);

    /**
     * @dev Processes multiple attestations and verifies whether they are valid.
     *
     * @param attestations The new attestations.
     * @param values Explicit ETH amounts which were sent with each attestation.
     *
     * @return Whether all the attestations are valid.
     */
    function multiAttest(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable returns (bool);

    /**
     * @dev Processes an attestation revocation and verifies if it can be revoked.
     *
     * @param attestation The existing attestation to be revoked.
     *
     * @return Whether the attestation can be revoked.
     */
    function revoke(Attestation calldata attestation) external payable returns (bool);

    /**
     * @dev Processes revocation of multiple attestation and verifies they can be revoked.
     *
     * @param attestations The existing attestations to be revoked.
     * @param values Explicit ETH amounts which were sent with each revocation.
     *
     * @return Whether the attestations can be revoked.
     */
    function multiRevoke(
        Attestation[] calldata attestations,
        uint256[] calldata values
    ) external payable returns (bool);
}

{
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "none",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "remappings": [],
  "viaIR": true,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[],"name":"AlreadyExists","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"uid","type":"bytes32"},{"indexed":false,"internalType":"address","name":"registerer","type":"address"}],"name":"Registered","type":"event"},{"inputs":[],"name":"VERSION","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"uid","type":"bytes32"}],"name":"getSchema","outputs":[{"components":[{"internalType":"bytes32","name":"uid","type":"bytes32"},{"internalType":"contract ISchemaResolver","name":"resolver","type":"address"},{"internalType":"bool","name":"revocable","type":"bool"},{"internalType":"string","name":"schema","type":"string"}],"internalType":"struct SchemaRecord","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"schema","type":"string"},{"internalType":"contract ISchemaResolver","name":"resolver","type":"address"},{"internalType":"bool","name":"revocable","type":"bool"}],"name":"register","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"}]

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