// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

import { Address } from "@openzeppelin/contracts/utils/Address.sol";

import { EIP1271Verifier } from "./eip1271/EIP1271Verifier.sol";

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

// prettier-ignore
import {
    AccessDenied,
    EMPTY_UID,
    Signature,
    InvalidLength,
    NotFound,
    NO_EXPIRATION_TIME,
    uncheckedInc
} from "./Common.sol";

// prettier-ignore
import {
    Attestation,
    AttestationRequest,
    AttestationRequestData,
    DelegatedAttestationRequest,
    DelegatedRevocationRequest,
    IEAS,
    MultiAttestationRequest,
    MultiDelegatedAttestationRequest,
    MultiDelegatedRevocationRequest,
    MultiRevocationRequest,
    RevocationRequest,
    RevocationRequestData
} from "./IEAS.sol";

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

/// @title EAS
/// @notice The Ethereum Attestation Service protocol.
contract EAS is IEAS, Semver, EIP1271Verifier {
    using Address for address payable;

    error AlreadyRevoked();
    error AlreadyRevokedOffchain();
    error AlreadyTimestamped();
    error InsufficientValue();
    error InvalidAttestation();
    error InvalidAttestations();
    error InvalidExpirationTime();
    error InvalidOffset();
    error InvalidRegistry();
    error InvalidRevocation();
    error InvalidRevocations();
    error InvalidSchema();
    error InvalidVerifier();
    error Irrevocable();
    error NotPayable();
    error WrongSchema();

    /// @notice A struct representing an internal attestation result.
    struct AttestationsResult {
        uint256 usedValue; // Total ETH amount that was sent to resolvers.
        bytes32[] uids; // UIDs of the new attestations.
    }

    // The global schema registry.
    ISchemaRegistry private immutable _schemaRegistry;

    // The global mapping between attestations and their UIDs.
    mapping(bytes32 uid => Attestation attestation) private _db;

    // The global mapping between data and their timestamps.
    mapping(bytes32 data => uint64 timestamp) private _timestamps;

    // The global mapping between data and their revocation timestamps.
    mapping(address revoker => mapping(bytes32 data => uint64 timestamp) timestamps) private _revocationsOffchain;

    /// @dev Creates a new EAS instance.
    /// @param registry The address of the global schema registry.
    constructor(ISchemaRegistry registry) Semver(1, 3, 0) EIP1271Verifier("EAS", "1.3.0") {
        if (address(registry) == address(0)) {
            revert InvalidRegistry();
        }

        _schemaRegistry = registry;
    }

    /// @inheritdoc IEAS
    function getSchemaRegistry() external view returns (ISchemaRegistry) {
        return _schemaRegistry;
    }

    /// @inheritdoc IEAS
    function attest(AttestationRequest calldata request) external payable returns (bytes32) {
        AttestationRequestData[] memory data = new AttestationRequestData[](1);
        data[0] = request.data;

        return _attest(request.schema, data, msg.sender, msg.value, true).uids[0];
    }

    /// @inheritdoc IEAS
    function attestByDelegation(
        DelegatedAttestationRequest calldata delegatedRequest
    ) external payable returns (bytes32) {
        _verifyAttest(delegatedRequest);

        AttestationRequestData[] memory data = new AttestationRequestData[](1);
        data[0] = delegatedRequest.data;

        return _attest(delegatedRequest.schema, data, delegatedRequest.attester, msg.value, true).uids[0];
    }

    /// @inheritdoc IEAS
    function multiAttest(MultiAttestationRequest[] calldata multiRequests) external payable returns (bytes32[] memory) {
        // Since a multi-attest call is going to make multiple attestations for multiple schemas, we'd need to collect
        // all the returned UIDs into a single list.
        uint256 length = multiRequests.length;
        bytes32[][] memory totalUIDs = new bytes32[][](length);
        uint256 totalUIDCount = 0;

        // We are keeping track of the total available ETH amount that can be sent to resolvers and will keep deducting
        // from it to verify that there isn't any attempt to send too much ETH to resolvers. Please note that unless
        // some ETH was stuck in the contract by accident (which shouldn't happen in normal conditions), it won't be
        // possible to send too much ETH anyway.
        uint256 availableValue = msg.value;

        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            // The last batch is handled slightly differently: if the total available ETH wasn't spent in full and there
            // is a remainder - it will be refunded back to the attester (something that we can only verify during the
            // last and final batch).
            bool last;
            unchecked {
                last = i == length - 1;
            }

            // Process the current batch of attestations.
            MultiAttestationRequest calldata multiRequest = multiRequests[i];

            // Ensure that data isn't empty.
            if (multiRequest.data.length == 0) {
                revert InvalidLength();
            }

            AttestationsResult memory res = _attest(
                multiRequest.schema,
                multiRequest.data,
                msg.sender,
                availableValue,
                last
            );

            // Ensure to deduct the ETH that was forwarded to the resolver during the processing of this batch.
            availableValue -= res.usedValue;

            // Collect UIDs (and merge them later).
            totalUIDs[i] = res.uids;
            unchecked {
                totalUIDCount += res.uids.length;
            }
        }

        // Merge all the collected UIDs and return them as a flatten array.
        return _mergeUIDs(totalUIDs, totalUIDCount);
    }

    /// @inheritdoc IEAS
    function multiAttestByDelegation(
        MultiDelegatedAttestationRequest[] calldata multiDelegatedRequests
    ) external payable returns (bytes32[] memory) {
        // Since a multi-attest call is going to make multiple attestations for multiple schemas, we'd need to collect
        // all the returned UIDs into a single list.
        uint256 length = multiDelegatedRequests.length;
        bytes32[][] memory totalUIDs = new bytes32[][](length);
        uint256 totalUIDCount = 0;

        // We are keeping track of the total available ETH amount that can be sent to resolvers and will keep deducting
        // from it to verify that there isn't any attempt to send too much ETH to resolvers. Please note that unless
        // some ETH was stuck in the contract by accident (which shouldn't happen in normal conditions), it won't be
        // possible to send too much ETH anyway.
        uint256 availableValue = msg.value;

        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            // The last batch is handled slightly differently: if the total available ETH wasn't spent in full and there
            // is a remainder - it will be refunded back to the attester (something that we can only verify during the
            // last and final batch).
            bool last;
            unchecked {
                last = i == length - 1;
            }

            MultiDelegatedAttestationRequest calldata multiDelegatedRequest = multiDelegatedRequests[i];
            AttestationRequestData[] calldata data = multiDelegatedRequest.data;

            // Ensure that no inputs are missing.
            uint256 dataLength = data.length;
            if (dataLength == 0 || dataLength != multiDelegatedRequest.signatures.length) {
                revert InvalidLength();
            }

            // Verify signatures. Please note that the signatures are assumed to be signed with increasing nonces.
            for (uint256 j = 0; j < dataLength; j = uncheckedInc(j)) {
                _verifyAttest(
                    DelegatedAttestationRequest({
                        schema: multiDelegatedRequest.schema,
                        data: data[j],
                        signature: multiDelegatedRequest.signatures[j],
                        attester: multiDelegatedRequest.attester,
                        deadline: multiDelegatedRequest.deadline
                    })
                );
            }

            // Process the current batch of attestations.
            AttestationsResult memory res = _attest(
                multiDelegatedRequest.schema,
                data,
                multiDelegatedRequest.attester,
                availableValue,
                last
            );

            // Ensure to deduct the ETH that was forwarded to the resolver during the processing of this batch.
            availableValue -= res.usedValue;

            // Collect UIDs (and merge them later).
            totalUIDs[i] = res.uids;
            unchecked {
                totalUIDCount += res.uids.length;
            }
        }

        // Merge all the collected UIDs and return them as a flatten array.
        return _mergeUIDs(totalUIDs, totalUIDCount);
    }

    /// @inheritdoc IEAS
    function revoke(RevocationRequest calldata request) external payable {
        RevocationRequestData[] memory data = new RevocationRequestData[](1);
        data[0] = request.data;

        _revoke(request.schema, data, msg.sender, msg.value, true);
    }

    /// @inheritdoc IEAS
    function revokeByDelegation(DelegatedRevocationRequest calldata delegatedRequest) external payable {
        _verifyRevoke(delegatedRequest);

        RevocationRequestData[] memory data = new RevocationRequestData[](1);
        data[0] = delegatedRequest.data;

        _revoke(delegatedRequest.schema, data, delegatedRequest.revoker, msg.value, true);
    }

    /// @inheritdoc IEAS
    function multiRevoke(MultiRevocationRequest[] calldata multiRequests) external payable {
        // We are keeping track of the total available ETH amount that can be sent to resolvers and will keep deducting
        // from it to verify that there isn't any attempt to send too much ETH to resolvers. Please note that unless
        // some ETH was stuck in the contract by accident (which shouldn't happen in normal conditions), it won't be
        // possible to send too much ETH anyway.
        uint256 availableValue = msg.value;

        uint256 length = multiRequests.length;
        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            // The last batch is handled slightly differently: if the total available ETH wasn't spent in full and there
            // is a remainder - it will be refunded back to the attester (something that we can only verify during the
            // last and final batch).
            bool last;
            unchecked {
                last = i == length - 1;
            }

            MultiRevocationRequest calldata multiRequest = multiRequests[i];

            // Ensure to deduct the ETH that was forwarded to the resolver during the processing of this batch.
            availableValue -= _revoke(multiRequest.schema, multiRequest.data, msg.sender, availableValue, last);
        }
    }

    /// @inheritdoc IEAS
    function multiRevokeByDelegation(
        MultiDelegatedRevocationRequest[] calldata multiDelegatedRequests
    ) external payable {
        // We are keeping track of the total available ETH amount that can be sent to resolvers and will keep deducting
        // from it to verify that there isn't any attempt to send too much ETH to resolvers. Please note that unless
        // some ETH was stuck in the contract by accident (which shouldn't happen in normal conditions), it won't be
        // possible to send too much ETH anyway.
        uint256 availableValue = msg.value;

        uint256 length = multiDelegatedRequests.length;
        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            // The last batch is handled slightly differently: if the total available ETH wasn't spent in full and there
            // is a remainder - it will be refunded back to the attester (something that we can only verify during the
            // last and final batch).
            bool last;
            unchecked {
                last = i == length - 1;
            }

            MultiDelegatedRevocationRequest memory multiDelegatedRequest = multiDelegatedRequests[i];
            RevocationRequestData[] memory data = multiDelegatedRequest.data;

            // Ensure that no inputs are missing.
            uint256 dataLength = data.length;
            if (dataLength == 0 || dataLength != multiDelegatedRequest.signatures.length) {
                revert InvalidLength();
            }

            // Verify signatures. Please note that the signatures are assumed to be signed with increasing nonces.
            for (uint256 j = 0; j < dataLength; j = uncheckedInc(j)) {
                _verifyRevoke(
                    DelegatedRevocationRequest({
                        schema: multiDelegatedRequest.schema,
                        data: data[j],
                        signature: multiDelegatedRequest.signatures[j],
                        revoker: multiDelegatedRequest.revoker,
                        deadline: multiDelegatedRequest.deadline
                    })
                );
            }

            // Ensure to deduct the ETH that was forwarded to the resolver during the processing of this batch.
            availableValue -= _revoke(
                multiDelegatedRequest.schema,
                data,
                multiDelegatedRequest.revoker,
                availableValue,
                last
            );
        }
    }

    /// @inheritdoc IEAS
    function timestamp(bytes32 data) external returns (uint64) {
        uint64 time = _time();

        _timestamp(data, time);

        return time;
    }

    /// @inheritdoc IEAS
    function revokeOffchain(bytes32 data) external returns (uint64) {
        uint64 time = _time();

        _revokeOffchain(msg.sender, data, time);

        return time;
    }

    /// @inheritdoc IEAS
    function multiRevokeOffchain(bytes32[] calldata data) external returns (uint64) {
        uint64 time = _time();

        uint256 length = data.length;
        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            _revokeOffchain(msg.sender, data[i], time);
        }

        return time;
    }

    /// @inheritdoc IEAS
    function multiTimestamp(bytes32[] calldata data) external returns (uint64) {
        uint64 time = _time();

        uint256 length = data.length;
        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            _timestamp(data[i], time);
        }

        return time;
    }

    /// @inheritdoc IEAS
    function getAttestation(bytes32 uid) external view returns (Attestation memory) {
        return _db[uid];
    }

    /// @inheritdoc IEAS
    function isAttestationValid(bytes32 uid) public view returns (bool) {
        return _db[uid].uid != EMPTY_UID;
    }

    /// @inheritdoc IEAS
    function getTimestamp(bytes32 data) external view returns (uint64) {
        return _timestamps[data];
    }

    /// @inheritdoc IEAS
    function getRevokeOffchain(address revoker, bytes32 data) external view returns (uint64) {
        return _revocationsOffchain[revoker][data];
    }

    /// @dev Attests to a specific schema.
    /// @param schemaUID The unique identifier of the schema to attest to.
    /// @param data The arguments of the attestation requests.
    /// @param attester The attesting account.
    /// @param availableValue The total available ETH amount that can be sent to the resolver.
    /// @param last Whether this is the last attestations/revocations set.
    /// @return The UID of the new attestations and the total sent ETH amount.
    function _attest(
        bytes32 schemaUID,
        AttestationRequestData[] memory data,
        address attester,
        uint256 availableValue,
        bool last
    ) private returns (AttestationsResult memory) {
        uint256 length = data.length;

        AttestationsResult memory res;
        res.uids = new bytes32[](length);

        // Ensure that we aren't attempting to attest to a non-existing schema.
        SchemaRecord memory schemaRecord = _schemaRegistry.getSchema(schemaUID);
        if (schemaRecord.uid == EMPTY_UID) {
            revert InvalidSchema();
        }

        Attestation[] memory attestations = new Attestation[](length);
        uint256[] memory values = new uint256[](length);

        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            AttestationRequestData memory request = data[i];

            // Ensure that either no expiration time was set or that it was set in the future.
            if (request.expirationTime != NO_EXPIRATION_TIME && request.expirationTime <= _time()) {
                revert InvalidExpirationTime();
            }

            // Ensure that we aren't trying to make a revocable attestation for a non-revocable schema.
            if (!schemaRecord.revocable && request.revocable) {
                revert Irrevocable();
            }

            Attestation memory attestation = Attestation({
                uid: EMPTY_UID,
                schema: schemaUID,
                refUID: request.refUID,
                time: _time(),
                expirationTime: request.expirationTime,
                revocationTime: 0,
                recipient: request.recipient,
                attester: attester,
                revocable: request.revocable,
                data: request.data
            });

            // Look for the first non-existing UID (and use a bump seed/nonce in the rare case of a conflict).
            bytes32 uid;
            uint32 bump = 0;
            while (true) {
                uid = _getUID(attestation, bump);
                if (_db[uid].uid == EMPTY_UID) {
                    break;
                }

                unchecked {
                    ++bump;
                }
            }
            attestation.uid = uid;

            _db[uid] = attestation;

            if (request.refUID != EMPTY_UID) {
                // Ensure that we aren't trying to attest to a non-existing referenced UID.
                if (!isAttestationValid(request.refUID)) {
                    revert NotFound();
                }
            }

            attestations[i] = attestation;
            values[i] = request.value;

            res.uids[i] = uid;

            emit Attested(request.recipient, attester, uid, schemaUID);
        }

        res.usedValue = _resolveAttestations(schemaRecord, attestations, values, false, availableValue, last);

        return res;
    }

    /// @dev Revokes an existing attestation to a specific schema.
    /// @param schemaUID The unique identifier of the schema to attest to.
    /// @param data The arguments of the revocation requests.
    /// @param revoker The revoking account.
    /// @param availableValue The total available ETH amount that can be sent to the resolver.
    /// @param last Whether this is the last attestations/revocations set.
    /// @return Returns the total sent ETH amount.
    function _revoke(
        bytes32 schemaUID,
        RevocationRequestData[] memory data,
        address revoker,
        uint256 availableValue,
        bool last
    ) private returns (uint256) {
        // Ensure that a non-existing schema ID wasn't passed by accident.
        SchemaRecord memory schemaRecord = _schemaRegistry.getSchema(schemaUID);
        if (schemaRecord.uid == EMPTY_UID) {
            revert InvalidSchema();
        }

        uint256 length = data.length;
        Attestation[] memory attestations = new Attestation[](length);
        uint256[] memory values = new uint256[](length);

        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            RevocationRequestData memory request = data[i];

            Attestation storage attestation = _db[request.uid];

            // Ensure that we aren't attempting to revoke a non-existing attestation.
            if (attestation.uid == EMPTY_UID) {
                revert NotFound();
            }

            // Ensure that a wrong schema ID wasn't passed by accident.
            if (attestation.schema != schemaUID) {
                revert InvalidSchema();
            }

            // Allow only original attesters to revoke their attestations.
            if (attestation.attester != revoker) {
                revert AccessDenied();
            }

            // Please note that also checking of the schema itself is revocable is unnecessary, since it's not possible to
            // make revocable attestations to an irrevocable schema.
            if (!attestation.revocable) {
                revert Irrevocable();
            }

            // Ensure that we aren't trying to revoke the same attestation twice.
            if (attestation.revocationTime != 0) {
                revert AlreadyRevoked();
            }
            attestation.revocationTime = _time();

            attestations[i] = attestation;
            values[i] = request.value;

            emit Revoked(attestations[i].recipient, revoker, request.uid, schemaUID);
        }

        return _resolveAttestations(schemaRecord, attestations, values, true, availableValue, last);
    }

    /// @dev Resolves a new attestation or a revocation of an existing attestation.
    /// @param schemaRecord The schema of the attestation.
    /// @param attestation The data of the attestation to make/revoke.
    /// @param value An explicit ETH amount to send to the resolver.
    /// @param isRevocation Whether to resolve an attestation or its revocation.
    /// @param availableValue The total available ETH amount that can be sent to the resolver.
    /// @param last Whether this is the last attestations/revocations set.
    /// @return Returns the total sent ETH amount.
    function _resolveAttestation(
        SchemaRecord memory schemaRecord,
        Attestation memory attestation,
        uint256 value,
        bool isRevocation,
        uint256 availableValue,
        bool last
    ) private returns (uint256) {
        ISchemaResolver resolver = schemaRecord.resolver;
        if (address(resolver) == address(0)) {
            // Ensure that we don't accept payments if there is no resolver.
            if (value != 0) {
                revert NotPayable();
            }

            if (last) {
                _refund(availableValue);
            }

            return 0;
        }

        // Ensure that we don't accept payments which can't be forwarded to the resolver.
        if (value != 0) {
            if (!resolver.isPayable()) {
                revert NotPayable();
            }

            // Ensure that the attester/revoker doesn't try to spend more than available.
            if (value > availableValue) {
                revert InsufficientValue();
            }

            // Ensure to deduct the sent value explicitly.
            unchecked {
                availableValue -= value;
            }
        }

        if (isRevocation) {
            if (!resolver.revoke{ value: value }(attestation)) {
                revert InvalidRevocation();
            }
        } else if (!resolver.attest{ value: value }(attestation)) {
            revert InvalidAttestation();
        }

        if (last) {
            _refund(availableValue);
        }

        return value;
    }

    /// @dev Resolves multiple attestations or revocations of existing attestations.
    /// @param schemaRecord The schema of the attestation.
    /// @param attestations The data of the attestations to make/revoke.
    /// @param values Explicit ETH amounts to send to the resolver.
    /// @param isRevocation Whether to resolve an attestation or its revocation.
    /// @param availableValue The total available ETH amount that can be sent to the resolver.
    /// @param last Whether this is the last attestations/revocations set.
    /// @return Returns the total sent ETH amount.
    function _resolveAttestations(
        SchemaRecord memory schemaRecord,
        Attestation[] memory attestations,
        uint256[] memory values,
        bool isRevocation,
        uint256 availableValue,
        bool last
    ) private returns (uint256) {
        uint256 length = attestations.length;
        if (length == 1) {
            return _resolveAttestation(schemaRecord, attestations[0], values[0], isRevocation, availableValue, last);
        }

        ISchemaResolver resolver = schemaRecord.resolver;
        if (address(resolver) == address(0)) {
            // Ensure that we don't accept payments if there is no resolver.
            for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
                if (values[i] != 0) {
                    revert NotPayable();
                }
            }

            if (last) {
                _refund(availableValue);
            }

            return 0;
        }

        uint256 totalUsedValue = 0;
        bool isResolverPayable = resolver.isPayable();

        for (uint256 i = 0; i < length; i = uncheckedInc(i)) {
            uint256 value = values[i];

            // Ensure that we don't accept payments which can't be forwarded to the resolver.
            if (value == 0) {
                continue;
            }

            if (!isResolverPayable) {
                revert NotPayable();
            }

            // Ensure that the attester/revoker doesn't try to spend more than available.
            if (value > availableValue) {
                revert InsufficientValue();
            }

            // Ensure to deduct the sent value explicitly and add it to the total used value by the batch.
            unchecked {
                availableValue -= value;
                totalUsedValue += value;
            }
        }

        if (isRevocation) {
            if (!resolver.multiRevoke{ value: totalUsedValue }(attestations, values)) {
                revert InvalidRevocations();
            }
        } else if (!resolver.multiAttest{ value: totalUsedValue }(attestations, values)) {
            revert InvalidAttestations();
        }

        if (last) {
            _refund(availableValue);
        }

        return totalUsedValue;
    }

    /// @dev Calculates a UID for a given attestation.
    /// @param attestation The input attestation.
    /// @param bump A bump value to use in case of a UID conflict.
    /// @return Attestation UID.
    function _getUID(Attestation memory attestation, uint32 bump) private pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    attestation.schema,
                    attestation.recipient,
                    attestation.attester,
                    attestation.time,
                    attestation.expirationTime,
                    attestation.revocable,
                    attestation.refUID,
                    attestation.data,
                    bump
                )
            );
    }

    /// @dev Refunds remaining ETH amount to the attester.
    /// @param remainingValue The remaining ETH amount that was not sent to the resolver.
    function _refund(uint256 remainingValue) private {
        if (remainingValue > 0) {
            // Using a regular transfer here might revert, for some non-EOA attesters, due to exceeding of the 2300
            // gas limit which is why we're using call instead (via sendValue), which the 2300 gas limit does not
            // apply for.
            payable(msg.sender).sendValue(remainingValue);
        }
    }

    /// @dev Timestamps the specified bytes32 data.
    /// @param data The data to timestamp.
    /// @param time The timestamp.
    function _timestamp(bytes32 data, uint64 time) private {
        if (_timestamps[data] != 0) {
            revert AlreadyTimestamped();
        }

        _timestamps[data] = time;

        emit Timestamped(data, time);
    }

    /// @dev Revokes the specified bytes32 data.
    /// @param revoker The revoking account.
    /// @param data The data to revoke.
    /// @param time The timestamp the data was revoked with.
    function _revokeOffchain(address revoker, bytes32 data, uint64 time) private {
        mapping(bytes32 data => uint64 timestamp) storage revocations = _revocationsOffchain[revoker];

        if (revocations[data] != 0) {
            revert AlreadyRevokedOffchain();
        }

        revocations[data] = time;

        emit RevokedOffchain(revoker, data, time);
    }

    /// @dev Merges lists of UIDs.
    /// @param uidLists The provided lists of UIDs.
    /// @param uidCount Total UID count.
    /// @return A merged and flatten list of all the UIDs.
    function _mergeUIDs(bytes32[][] memory uidLists, uint256 uidCount) private pure returns (bytes32[] memory) {
        bytes32[] memory uids = new bytes32[](uidCount);

        uint256 currentIndex = 0;
        uint256 uidListLength = uidLists.length;
        for (uint256 i = 0; i < uidListLength; i = uncheckedInc(i)) {
            bytes32[] memory currentUIDs = uidLists[i];
            uint256 currentUIDsLength = currentUIDs.length;
            for (uint256 j = 0; j < currentUIDsLength; j = uncheckedInc(j)) {
                uids[currentIndex] = currentUIDs[j];

                unchecked {
                    ++currentIndex;
                }
            }
        }

        return uids;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol)

pragma solidity ^0.8.0;

interface IERC5267 {
    /**
     * @dev MAY be emitted to signal that the domain could have changed.
     */
    event EIP712DomainChanged();

    /**
     * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
     * signature.
     */
    function eip712Domain()
        external
        view
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        );
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol)

pragma solidity ^0.8.8;

import "./StorageSlot.sol";

// | string  | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA   |
// | length  | 0x                                                              BB |
type ShortString is bytes32;

/**
 * @dev This library provides functions to convert short memory strings
 * into a `ShortString` type that can be used as an immutable variable.
 *
 * Strings of arbitrary length can be optimized using this library if
 * they are short enough (up to 31 bytes) by packing them with their
 * length (1 byte) in a single EVM word (32 bytes). Additionally, a
 * fallback mechanism can be used for every other case.
 *
 * Usage example:
 *
 * ```solidity
 * contract Named {
 *     using ShortStrings for *;
 *
 *     ShortString private immutable _name;
 *     string private _nameFallback;
 *
 *     constructor(string memory contractName) {
 *         _name = contractName.toShortStringWithFallback(_nameFallback);
 *     }
 *
 *     function name() external view returns (string memory) {
 *         return _name.toStringWithFallback(_nameFallback);
 *     }
 * }
 * ```
 */
library ShortStrings {
    // Used as an identifier for strings longer than 31 bytes.
    bytes32 private constant _FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;

    error StringTooLong(string str);
    error InvalidShortString();

    /**
     * @dev Encode a string of at most 31 chars into a `ShortString`.
     *
     * This will trigger a `StringTooLong` error is the input string is too long.
     */
    function toShortString(string memory str) internal pure returns (ShortString) {
        bytes memory bstr = bytes(str);
        if (bstr.length > 31) {
            revert StringTooLong(str);
        }
        return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));
    }

    /**
     * @dev Decode a `ShortString` back to a "normal" string.
     */
    function toString(ShortString sstr) internal pure returns (string memory) {
        uint256 len = byteLength(sstr);
        // using `new string(len)` would work locally but is not memory safe.
        string memory str = new string(32);
        /// @solidity memory-safe-assembly
        assembly {
            mstore(str, len)
            mstore(add(str, 0x20), sstr)
        }
        return str;
    }

    /**
     * @dev Return the length of a `ShortString`.
     */
    function byteLength(ShortString sstr) internal pure returns (uint256) {
        uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;
        if (result > 31) {
            revert InvalidShortString();
        }
        return result;
    }

    /**
     * @dev Encode a string into a `ShortString`, or write it to storage if it is too long.
     */
    function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {
        if (bytes(value).length < 32) {
            return toShortString(value);
        } else {
            StorageSlot.getStringSlot(store).value = value;
            return ShortString.wrap(_FALLBACK_SENTINEL);
        }
    }

    /**
     * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
     */
    function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {
        if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
            return toString(value);
        } else {
            return store;
        }
    }

    /**
     * @dev Return the length of a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
     *
     * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of
     * actual characters as the UTF-8 encoding of a single character can span over multiple bytes.
     */
    function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {
        if (ShortString.unwrap(value) != _FALLBACK_SENTINEL) {
            return byteLength(value);
        } else {
            return bytes(store).length;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32")
            mstore(0x1c, hash)
            message := keccak256(0x00, 0x3c)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, "\x19\x01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            data := keccak256(ptr, 0x42)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Data with intended validator, created from a
     * `validator` and `data` according to the version 0 of EIP-191.
     *
     * See {recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x00", validator, data));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol)

pragma solidity ^0.8.8;

import "./ECDSA.sol";
import "../ShortStrings.sol";
import "../../interfaces/IERC5267.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
 * separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the
 * separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
 *
 * _Available since v3.4._
 *
 * @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
 */
abstract contract EIP712 is IERC5267 {
    using ShortStrings for *;

    bytes32 private constant _TYPE_HASH =
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _cachedDomainSeparator;
    uint256 private immutable _cachedChainId;
    address private immutable _cachedThis;

    bytes32 private immutable _hashedName;
    bytes32 private immutable _hashedVersion;

    ShortString private immutable _name;
    ShortString private immutable _version;
    string private _nameFallback;
    string private _versionFallback;

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        _name = name.toShortStringWithFallback(_nameFallback);
        _version = version.toShortStringWithFallback(_versionFallback);
        _hashedName = keccak256(bytes(name));
        _hashedVersion = keccak256(bytes(version));

        _cachedChainId = block.chainid;
        _cachedDomainSeparator = _buildDomainSeparator();
        _cachedThis = address(this);
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
            return _cachedDomainSeparator;
        } else {
            return _buildDomainSeparator();
        }
    }

    function _buildDomainSeparator() private view returns (bytes32) {
        return keccak256(abi.encode(_TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /**
     * @dev See {EIP-5267}.
     *
     * _Available since v4.9._
     */
    function eip712Domain()
        public
        view
        virtual
        override
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        return (
            hex"0f", // 01111
            _name.toStringWithFallback(_nameFallback),
            _version.toStringWithFallback(_versionFallback),
            block.chainid,
            address(this),
            bytes32(0),
            new uint256[](0)
        );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/SignatureChecker.sol)

pragma solidity ^0.8.0;

import "./ECDSA.sol";
import "../../interfaces/IERC1271.sol";

/**
 * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA
 * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like
 * Argent and Gnosis Safe.
 *
 * _Available since v4.1._
 */
library SignatureChecker {
    /**
     * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the
     * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) {
        (address recovered, ECDSA.RecoverError error) = ECDSA.tryRecover(hash, signature);
        return
            (error == ECDSA.RecoverError.NoError && recovered == signer) ||
            isValidERC1271SignatureNow(signer, hash, signature);
    }

    /**
     * @dev Checks if a signature is valid for a given signer and data hash. The signature is validated
     * against the signer smart contract using ERC1271.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidERC1271SignatureNow(
        address signer,
        bytes32 hash,
        bytes memory signature
    ) internal view returns (bool) {
        (bool success, bytes memory result) = signer.staticcall(
            abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature)
        );
        return (success &&
            result.length >= 32 &&
            abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

// A zero expiration represents an non-expiring attestation.
uint64 constant NO_EXPIRATION_TIME = 0;

error AccessDenied();
error DeadlineExpired();
error InvalidEAS();
error InvalidLength();
error InvalidSignature();
error NotFound();

/// @notice A struct representing ECDSA signature data.
struct Signature {
    uint8 v; // The recovery ID.
    bytes32 r; // The x-coordinate of the nonce R.
    bytes32 s; // The signature data.
}

/// @notice 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.
}

/// @notice A helper function to work with unchecked iterators in loops.
function uncheckedInc(uint256 i) pure returns (uint256 j) {
    unchecked {
        j = i + 1;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISchemaRegistry } from "./ISchemaRegistry.sol";
import { ISemver } from "./ISemver.sol";
import { Attestation, Signature } from "./Common.sol";

/// @notice A struct representing the arguments of the attestation request.
struct AttestationRequestData {
    address recipient; // The recipient of the attestation.
    uint64 expirationTime; // The time when the attestation expires (Unix timestamp).
    bool revocable; // Whether the attestation is revocable.
    bytes32 refUID; // The UID of the related attestation.
    bytes data; // Custom attestation data.
    uint256 value; // An explicit ETH amount to send to the resolver. This is important to prevent accidental user errors.
}

/// @notice A struct representing the full arguments of the attestation request.
struct AttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData data; // The arguments of the attestation request.
}

/// @notice A struct representing the full arguments of the full delegated attestation request.
struct DelegatedAttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData data; // The arguments of the attestation request.
    Signature signature; // The ECDSA signature data.
    address attester; // The attesting account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @notice A struct representing the full arguments of the multi attestation request.
struct MultiAttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData[] data; // The arguments of the attestation request.
}

/// @notice A struct representing the full arguments of the delegated multi attestation request.
struct MultiDelegatedAttestationRequest {
    bytes32 schema; // The unique identifier of the schema.
    AttestationRequestData[] data; // The arguments of the attestation requests.
    Signature[] signatures; // The ECDSA signatures data. Please note that the signatures are assumed to be signed with increasing nonces.
    address attester; // The attesting account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @notice A struct representing the arguments of the revocation request.
struct RevocationRequestData {
    bytes32 uid; // The UID of the attestation to revoke.
    uint256 value; // An explicit ETH amount to send to the resolver. This is important to prevent accidental user errors.
}

/// @notice A struct representing the full arguments of the revocation request.
struct RevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData data; // The arguments of the revocation request.
}

/// @notice A struct representing the arguments of the full delegated revocation request.
struct DelegatedRevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData data; // The arguments of the revocation request.
    Signature signature; // The ECDSA signature data.
    address revoker; // The revoking account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @notice A struct representing the full arguments of the multi revocation request.
struct MultiRevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData[] data; // The arguments of the revocation request.
}

/// @notice A struct representing the full arguments of the delegated multi revocation request.
struct MultiDelegatedRevocationRequest {
    bytes32 schema; // The unique identifier of the schema.
    RevocationRequestData[] data; // The arguments of the revocation requests.
    Signature[] signatures; // The ECDSA signatures data. Please note that the signatures are assumed to be signed with increasing nonces.
    address revoker; // The revoking account.
    uint64 deadline; // The deadline of the signature/request.
}

/// @title IEAS
/// @notice EAS - Ethereum Attestation Service interface.
interface IEAS is ISemver {
    /// @notice Emitted when an attestation has been made.
    /// @param recipient The recipient of the attestation.
    /// @param attester The attesting account.
    /// @param uid The UID the revoked attestation.
    /// @param schemaUID The UID of the schema.
    event Attested(address indexed recipient, address indexed attester, bytes32 uid, bytes32 indexed schemaUID);

    /// @notice Emitted when an attestation has been revoked.
    /// @param recipient The recipient of the attestation.
    /// @param attester The attesting account.
    /// @param schemaUID The UID of the schema.
    /// @param uid The UID the revoked attestation.
    event Revoked(address indexed recipient, address indexed attester, bytes32 uid, bytes32 indexed schemaUID);

    /// @notice Emitted when a data has been timestamped.
    /// @param data The data.
    /// @param timestamp The timestamp.
    event Timestamped(bytes32 indexed data, uint64 indexed timestamp);

    /// @notice Emitted when a data has been revoked.
    /// @param revoker The address of the revoker.
    /// @param data The data.
    /// @param timestamp The timestamp.
    event RevokedOffchain(address indexed revoker, bytes32 indexed data, uint64 indexed timestamp);

    /// @notice Returns the address of the global schema registry.
    /// @return The address of the global schema registry.
    function getSchemaRegistry() external view returns (ISchemaRegistry);

    /// @notice Attests to a specific schema.
    /// @param request The arguments of the attestation request.
    /// @return The UID of the new attestation.
    ///
    /// Example:
    ///     attest({
    ///         schema: "0facc36681cbe2456019c1b0d1e7bedd6d1d40f6f324bf3dd3a4cef2999200a0",
    ///         data: {
    ///             recipient: "0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf",
    ///             expirationTime: 0,
    ///             revocable: true,
    ///             refUID: "0x0000000000000000000000000000000000000000000000000000000000000000",
    ///             data: "0xF00D",
    ///             value: 0
    ///         }
    ///     })
    function attest(AttestationRequest calldata request) external payable returns (bytes32);

    /// @notice Attests to a specific schema via the provided ECDSA signature.
    /// @param delegatedRequest The arguments of the delegated attestation request.
    /// @return The UID of the new attestation.
    ///
    /// Example:
    ///     attestByDelegation({
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: {
    ///             recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    ///             expirationTime: 1673891048,
    ///             revocable: true,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x1234',
    ///             value: 0
    ///         },
    ///         signature: {
    ///             v: 28,
    ///             r: '0x148c...b25b',
    ///             s: '0x5a72...be22'
    ///         },
    ///         attester: '0xc5E8740aD971409492b1A63Db8d83025e0Fc427e',
    ///         deadline: 1673891048
    ///     })
    function attestByDelegation(
        DelegatedAttestationRequest calldata delegatedRequest
    ) external payable returns (bytes32);

    /// @notice Attests to multiple schemas.
    /// @param multiRequests The arguments of the multi attestation requests. The requests should be grouped by distinct
    ///     schema ids to benefit from the best batching optimization.
    /// @return The UIDs of the new attestations.
    ///
    /// Example:
    ///     multiAttest([{
    ///         schema: '0x33e9094830a5cba5554d1954310e4fbed2ef5f859ec1404619adea4207f391fd',
    ///         data: [{
    ///             recipient: '0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf',
    ///             expirationTime: 1673891048,
    ///             revocable: true,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x1234',
    ///             value: 1000
    ///         },
    ///         {
    ///             recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    ///             expirationTime: 0,
    ///             revocable: false,
    ///             refUID: '0x480df4a039efc31b11bfdf491b383ca138b6bde160988222a2a3509c02cee174',
    ///             data: '0x00',
    ///             value: 0
    ///         }],
    ///     },
    ///     {
    ///         schema: '0x5ac273ce41e3c8bfa383efe7c03e54c5f0bff29c9f11ef6ffa930fc84ca32425',
    ///         data: [{
    ///             recipient: '0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf',
    ///             expirationTime: 0,
    ///             revocable: true,
    ///             refUID: '0x75bf2ed8dca25a8190c50c52db136664de25b2449535839008ccfdab469b214f',
    ///             data: '0x12345678',
    ///             value: 0
    ///         },
    ///     }])
    function multiAttest(MultiAttestationRequest[] calldata multiRequests) external payable returns (bytes32[] memory);

    /// @notice Attests to multiple schemas using via provided ECDSA signatures.
    /// @param multiDelegatedRequests The arguments of the delegated multi attestation requests. The requests should be
    ///     grouped by distinct schema ids to benefit from the best batching optimization.
    /// @return The UIDs of the new attestations.
    ///
    /// Example:
    ///     multiAttestByDelegation([{
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: [{
    ///             recipient: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
    ///             expirationTime: 1673891048,
    ///             revocable: true,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x1234',
    ///             value: 0
    ///         },
    ///         {
    ///             recipient: '0xdEADBeAFdeAdbEafdeadbeafDeAdbEAFdeadbeaf',
    ///             expirationTime: 0,
    ///             revocable: false,
    ///             refUID: '0x0000000000000000000000000000000000000000000000000000000000000000',
    ///             data: '0x00',
    ///             value: 0
    ///         }],
    ///         signatures: [{
    ///             v: 28,
    ///             r: '0x148c...b25b',
    ///             s: '0x5a72...be22'
    ///         },
    ///         {
    ///             v: 28,
    ///             r: '0x487s...67bb',
    ///             s: '0x12ad...2366'
    ///         }],
    ///         attester: '0x1D86495b2A7B524D747d2839b3C645Bed32e8CF4',
    ///         deadline: 1673891048
    ///     }])
    function multiAttestByDelegation(
        MultiDelegatedAttestationRequest[] calldata multiDelegatedRequests
    ) external payable returns (bytes32[] memory);

    /// @notice Revokes an existing attestation to a specific schema.
    /// @param request The arguments of the revocation request.
    ///
    /// Example:
    ///     revoke({
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: {
    ///             uid: '0x101032e487642ee04ee17049f99a70590c735b8614079fc9275f9dd57c00966d',
    ///             value: 0
    ///         }
    ///     })
    function revoke(RevocationRequest calldata request) external payable;

    /// @notice Revokes an existing attestation to a specific schema via the provided ECDSA signature.
    /// @param delegatedRequest The arguments of the delegated revocation request.
    ///
    /// Example:
    ///     revokeByDelegation({
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: {
    ///             uid: '0xcbbc12102578c642a0f7b34fe7111e41afa25683b6cd7b5a14caf90fa14d24ba',
    ///             value: 0
    ///         },
    ///         signature: {
    ///             v: 27,
    ///             r: '0xb593...7142',
    ///             s: '0x0f5b...2cce'
    ///         },
    ///         revoker: '0x244934dd3e31bE2c81f84ECf0b3E6329F5381992',
    ///         deadline: 1673891048
    ///     })
    function revokeByDelegation(DelegatedRevocationRequest calldata delegatedRequest) external payable;

    /// @notice Revokes existing attestations to multiple schemas.
    /// @param multiRequests The arguments of the multi revocation requests. The requests should be grouped by distinct
    ///     schema ids to benefit from the best batching optimization.
    ///
    /// Example:
    ///     multiRevoke([{
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: [{
    ///             uid: '0x211296a1ca0d7f9f2cfebf0daaa575bea9b20e968d81aef4e743d699c6ac4b25',
    ///             value: 1000
    ///         },
    ///         {
    ///             uid: '0xe160ac1bd3606a287b4d53d5d1d6da5895f65b4b4bab6d93aaf5046e48167ade',
    ///             value: 0
    ///         }],
    ///     },
    ///     {
    ///         schema: '0x5ac273ce41e3c8bfa383efe7c03e54c5f0bff29c9f11ef6ffa930fc84ca32425',
    ///         data: [{
    ///             uid: '0x053d42abce1fd7c8fcddfae21845ad34dae287b2c326220b03ba241bc5a8f019',
    ///             value: 0
    ///         },
    ///     }])
    function multiRevoke(MultiRevocationRequest[] calldata multiRequests) external payable;

    /// @notice Revokes existing attestations to multiple schemas via provided ECDSA signatures.
    /// @param multiDelegatedRequests The arguments of the delegated multi revocation attestation requests. The requests
    ///     should be grouped by distinct schema ids to benefit from the best batching optimization.
    ///
    /// Example:
    ///     multiRevokeByDelegation([{
    ///         schema: '0x8e72f5bc0a8d4be6aa98360baa889040c50a0e51f32dbf0baa5199bd93472ebc',
    ///         data: [{
    ///             uid: '0x211296a1ca0d7f9f2cfebf0daaa575bea9b20e968d81aef4e743d699c6ac4b25',
    ///             value: 1000
    ///         },
    ///         {
    ///             uid: '0xe160ac1bd3606a287b4d53d5d1d6da5895f65b4b4bab6d93aaf5046e48167ade',
    ///             value: 0
    ///         }],
    ///         signatures: [{
    ///             v: 28,
    ///             r: '0x148c...b25b',
    ///             s: '0x5a72...be22'
    ///         },
    ///         {
    ///             v: 28,
    ///             r: '0x487s...67bb',
    ///             s: '0x12ad...2366'
    ///         }],
    ///         revoker: '0x244934dd3e31bE2c81f84ECf0b3E6329F5381992',
    ///         deadline: 1673891048
    ///     }])
    function multiRevokeByDelegation(
        MultiDelegatedRevocationRequest[] calldata multiDelegatedRequests
    ) external payable;

    /// @notice Timestamps the specified bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was timestamped with.
    function timestamp(bytes32 data) external returns (uint64);

    /// @notice Timestamps the specified multiple bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was timestamped with.
    function multiTimestamp(bytes32[] calldata data) external returns (uint64);

    /// @notice Revokes the specified bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was revoked with.
    function revokeOffchain(bytes32 data) external returns (uint64);

    /// @notice Revokes the specified multiple bytes32 data.
    /// @param data The data to timestamp.
    /// @return The timestamp the data was revoked with.
    function multiRevokeOffchain(bytes32[] calldata data) external returns (uint64);

    /// @notice Returns an existing attestation by UID.
    /// @param uid The UID of the attestation to retrieve.
    /// @return The attestation data members.
    function getAttestation(bytes32 uid) external view returns (Attestation memory);

    /// @notice Checks whether an attestation exists.
    /// @param uid The UID of the attestation to retrieve.
    /// @return Whether an attestation exists.
    function isAttestationValid(bytes32 uid) external view returns (bool);

    /// @notice Returns the timestamp that the specified data was timestamped with.
    /// @param data The data to query.
    /// @return The timestamp the data was timestamped with.
    function getTimestamp(bytes32 data) external view returns (uint64);

    /// @notice Returns the timestamp that the specified data was timestamped with.
    /// @param data The data to query.
    /// @return The timestamp the data was timestamped with.
    function getRevokeOffchain(address revoker, bytes32 data) external view returns (uint64);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISemver } from "./ISemver.sol";

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

/// @notice 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 ISchemaRegistry
/// @notice The interface of global attestation schemas for the Ethereum Attestation Service protocol.
interface ISchemaRegistry is ISemver {
    /// @notice 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.
    /// @param schema The schema data.
    event Registered(bytes32 indexed uid, address indexed registerer, SchemaRecord schema);

    /// @notice 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);

    /// @notice 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 ^0.8.0;

/// @title ISemver
/// @notice A semver interface.
interface ISemver {
    /// @notice Returns the full semver contract version.
    /// @return Semver contract version as a string.
    function version() external view returns (string memory);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";

import { ISemver } from "./ISemver.sol";

/// @title Semver
/// @notice A simple contract for managing contract versions.
contract Semver is ISemver {
    // Contract's major version number.
    uint256 private immutable _major;

    // Contract's minor version number.
    uint256 private immutable _minor;

    // Contract's patch version number.
    uint256 private immutable _patch;

    /// @dev Create a new Semver instance.
    /// @param major Major version number.
    /// @param minor Minor version number.
    /// @param patch Patch version number.
    constructor(uint256 major, uint256 minor, uint256 patch) {
        _major = major;
        _minor = minor;
        _patch = patch;
    }

    /// @notice Returns the full semver contract version.
    /// @return Semver contract version as a string.
    function version() external view returns (string memory) {
        return
            string(
                abi.encodePacked(Strings.toString(_major), ".", Strings.toString(_minor), ".", Strings.toString(_patch))
            );
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

import { EIP712 } from "@openzeppelin/contracts/utils/cryptography/EIP712.sol";
import { SignatureChecker } from "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";

// prettier-ignore
import {
    AttestationRequestData,
    DelegatedAttestationRequest,
    DelegatedRevocationRequest,
    RevocationRequestData
} from "../IEAS.sol";

import { DeadlineExpired, NO_EXPIRATION_TIME, Signature, InvalidSignature } from "../Common.sol";

/// @title EIP1271Verifier
/// @notice EIP1271Verifier typed signatures verifier for EAS delegated attestations.
abstract contract EIP1271Verifier is EIP712 {
    using Address for address;

    error InvalidNonce();

    // The hash of the data type used to relay calls to the attest function. It's the value of
    // keccak256("Attest(address attester,bytes32 schema,address recipient,uint64 expirationTime,bool revocable,bytes32 refUID,bytes data,uint256 value,uint256 nonce,uint64 deadline)").
    bytes32 private constant ATTEST_TYPEHASH = 0xfeb2925a02bae3dae48d424a0437a2b6ac939aa9230ddc55a1a76f065d988076;

    // The hash of the data type used to relay calls to the revoke function. It's the value of
    // keccak256("Revoke(address revoker,bytes32 schema,bytes32 uid,uint256 value,uint256 nonce,uint64 deadline)").
    bytes32 private constant REVOKE_TYPEHASH = 0xb5d556f07587ec0f08cf386545cc4362c702a001650c2058002615ee5c9d1e75;

    // The user readable name of the signing domain.
    string private _name;

    // Replay protection nonces.
    mapping(address attester => uint256 nonce) private _nonces;

    /// @notice Emitted when users invalidate nonces by increasing their nonces to (higher) new values.
    /// @param oldNonce The previous nonce.
    /// @param newNonce The new value.
    event NonceIncreased(uint256 oldNonce, uint256 newNonce);

    /// @dev Creates a new EIP1271Verifier instance.
    /// @param version The current major version of the signing domain
    constructor(string memory name, string memory version) EIP712(name, version) {
        _name = name;
    }

    /// @notice Returns the domain separator used in the encoding of the signatures for attest, and revoke.
    /// @return The domain separator used in the encoding of the signatures for attest, and revoke.
    function getDomainSeparator() external view returns (bytes32) {
        return _domainSeparatorV4();
    }

    /// @notice Returns the current nonce per-account.
    /// @param account The requested account.
    /// @return The current nonce.
    function getNonce(address account) external view returns (uint256) {
        return _nonces[account];
    }

    /// @notice Returns the EIP712 type hash for the attest function.
    /// @return The EIP712 type hash for the attest function.
    function getAttestTypeHash() external pure returns (bytes32) {
        return ATTEST_TYPEHASH;
    }

    /// @notice Returns the EIP712 type hash for the revoke function.
    /// @return The EIP712 type hash for the revoke function.
    function getRevokeTypeHash() external pure returns (bytes32) {
        return REVOKE_TYPEHASH;
    }

    /// @notice Returns the EIP712 name.
    /// @return The EIP712 name.
    function getName() external view returns (string memory) {
        return _name;
    }

    /// @notice Provides users an option to invalidate nonces by increasing their nonces to (higher) new values.
    /// @param newNonce The (higher) new value.
    function increaseNonce(uint256 newNonce) external {
        uint256 oldNonce = _nonces[msg.sender];
        if (newNonce <= oldNonce) {
            revert InvalidNonce();
        }

        _nonces[msg.sender] = newNonce;

        emit NonceIncreased({ oldNonce: oldNonce, newNonce: newNonce });
    }

    /// @dev Verifies delegated attestation request.
    /// @param request The arguments of the delegated attestation request.
    function _verifyAttest(DelegatedAttestationRequest memory request) internal {
        if (request.deadline != NO_EXPIRATION_TIME && request.deadline < _time()) {
            revert DeadlineExpired();
        }

        AttestationRequestData memory data = request.data;
        Signature memory signature = request.signature;

        bytes32 hash = _hashTypedDataV4(
            keccak256(
                abi.encode(
                    ATTEST_TYPEHASH,
                    request.attester,
                    request.schema,
                    data.recipient,
                    data.expirationTime,
                    data.revocable,
                    data.refUID,
                    keccak256(data.data),
                    data.value,
                    _nonces[request.attester]++,
                    request.deadline
                )
            )
        );
        if (
            !SignatureChecker.isValidSignatureNow(
                request.attester,
                hash,
                abi.encodePacked(signature.r, signature.s, signature.v)
            )
        ) {
            revert InvalidSignature();
        }
    }

    /// @dev Verifies delegated revocation request.
    /// @param request The arguments of the delegated revocation request.
    function _verifyRevoke(DelegatedRevocationRequest memory request) internal {
        if (request.deadline != NO_EXPIRATION_TIME && request.deadline < _time()) {
            revert DeadlineExpired();
        }

        RevocationRequestData memory data = request.data;
        Signature memory signature = request.signature;

        bytes32 hash = _hashTypedDataV4(
            keccak256(
                abi.encode(
                    REVOKE_TYPEHASH,
                    request.revoker,
                    request.schema,
                    data.uid,
                    data.value,
                    _nonces[request.revoker]++,
                    request.deadline
                )
            )
        );
        if (
            !SignatureChecker.isValidSignatureNow(
                request.revoker,
                hash,
                abi.encodePacked(signature.r, signature.s, signature.v)
            )
        ) {
            revert InvalidSignature();
        }
    }

    /// @dev Returns the current's block timestamp. This method is overridden during tests and used to simulate the
    ///     current block time.
    function _time() internal view virtual returns (uint64) {
        return uint64(block.timestamp);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { ISemver } from "../ISemver.sol";
import { Attestation } from "../Common.sol";

/// @title ISchemaResolver
/// @notice The interface of an optional schema resolver.
interface ISchemaResolver is ISemver {
    /// @notice Checks if the resolver can be sent ETH.
    /// @return Whether the resolver supports ETH transfers.
    function isPayable() external pure returns (bool);

    /// @notice 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);

    /// @notice 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);

    /// @notice 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);

    /// @notice 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": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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ISchemaRegistry","name":"registry","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AccessDenied","type":"error"},{"inputs":[],"name":"AlreadyRevoked","type":"error"},{"inputs":[],"name":"AlreadyRevokedOffchain","type":"error"},{"inputs":[],"name":"AlreadyTimestamped","type":"error"},{"inputs":[],"name":"DeadlineExpired","type":"error"},{"inputs":[],"name":"InsufficientValue","type":"error"},{"inputs":[],"name":"InvalidAttestation","type":"error"},{"inputs":[],"name":"InvalidAttestations","type":"error"},{"inputs":[],"name":"InvalidExpirationTime","type":"error"},{"inputs":[],"name":"InvalidLength","type":"error"},{"inputs":[],"name":"InvalidNonce","type":"error"},{"inputs":[],"name":"InvalidOffset","type":"error"},{"inputs":[],"name":"InvalidRegistry","type":"error"},{"inputs":[],"name":"InvalidRevocation","type":"error"},{"inputs":[],"name":"InvalidRevocations","type":"error"},{"inputs":[],"name":"InvalidSchema","type":"error"},{"inputs":[],"name":"InvalidShortString","type":"error"},{"inputs":[],"name":"InvalidSignature","type":"error"},{"inputs":[],"name":"InvalidVerifier","type":"error"},{"inputs":[],"name":"Irrevocable","type":"error"},{"inputs":[],"name":"NotFound","type":"error"},{"inputs":[],"name":"NotPayable","type":"error"},{"inputs":[{"internalType":"string","name":"str","type":"string"}],"name":"StringTooLong","type":"error"},{"inputs":[],"name":"WrongSchema","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":true,"internalType":"address","name":"attester","type":"address"},{"indexed":false,"internalType":"bytes32","name":"uid","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"schemaUID","type":"bytes32"}],"name":"Attested","type":"event"},{"anonymous":false,"inputs":[],"name":"EIP712DomainChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"oldNonce","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newNonce","type":"uint256"}],"name":"NonceIncreased","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":true,"internalType":"address","name":"attester","type":"address"},{"indexed":false,"internalType":"bytes32","name":"uid","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"schemaUID","type":"bytes32"}],"name":"Revoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"revoker","type":"address"},{"indexed":true,"internalType":"bytes32","name":"data","type":"bytes32"},{"indexed":true,"internalType":"uint64","name":"timestamp","type":"uint64"}],"name":"RevokedOffchain","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"data","type":"bytes32"},{"indexed":true,"internalType":"uint64","name":"timestamp","type":"uint64"}],"name":"Timestamped","type":"event"},{"inputs":[{"components":[{"internalType":"bytes32","name":"schema","type":"bytes32"},{"components":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint64","name":"expirationTime","type":"uint64"},{"internalType":"bool","name":"revocable","type":"bool"},{"internalType":"bytes32","name":"refUID","type":"bytes32"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"value","type":"uint256"}],"internalType":"struct AttestationRequestData","name":"data","type":"tuple"}],"internalType":"struct AttestationRequest","name":"request","type":"tuple"}],"name":"attest","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"schema","type":"bytes32"},{"components":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint64","name":"expirationTime","type":"uint64"},{"internalType":"bool","name":"revocable","type":"bool"},{"internalType":"bytes32","name":"refUID","type":"bytes32"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"value","type":"uint256"}],"internalType":"struct AttestationRequestData","name":"data","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct Signature","name":"signature","type":"tuple"},{"internalType":"address","name":"attester","type":"address"},{"internalType":"uint64","name":"deadline","type":"uint64"}],"internalType":"struct DelegatedAttestationRequest","name":"delegatedRequest","type":"tuple"}],"name":"attestByDelegation","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"eip712Domain","outputs":[{"internalType":"bytes1","name":"fields","type":"bytes1"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"version","type":"string"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"address","name":"verifyingContract","type":"address"},{"internalType":"bytes32","name":"salt","type":"bytes32"},{"internalType":"uint256[]","name":"extensions","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAttestTypeHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes32","name":"uid","type":"bytes32"}],"name":"getAttestation","outputs":[{"components":[{"internalType":"bytes32","name":"uid","type":"bytes32"},{"internalType":"bytes32","name":"schema","type":"bytes32"},{"internalType":"uint64","name":"time","type":"uint64"},{"internalType":"uint64","name":"expirationTime","type":"uint64"},{"internalType":"uint64","name":"revocationTime","type":"uint64"},{"internalType":"bytes32","name":"refUID","type":"bytes32"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"address","name":"attester","type":"address"},{"internalType":"bool","name":"revocable","type":"bool"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct Attestation","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getDomainSeparator","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getName","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getNonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"revoker","type":"address"},{"internalType":"bytes32","name":"data","type":"bytes32"}],"name":"getRevokeOffchain","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getRevokeTypeHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getSchemaRegistry","outputs":[{"internalType":"contract ISchemaRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"data","type":"bytes32"}],"name":"getTimestamp","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"newNonce","type":"uint256"}],"name":"increaseNonce","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"uid","type":"bytes32"}],"name":"isAttestationValid","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"schema","type":"bytes32"},{"components":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint64","name":"expirationTime","type":"uint64"},{"internalType":"bool","name":"revocable","type":"bool"},{"internalType":"bytes32","name":"refUID","type":"bytes32"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"value","type":"uint256"}],"internalType":"struct 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RevocationRequestData[]","name":"data","type":"tuple[]"}],"internalType":"struct MultiRevocationRequest[]","name":"multiRequests","type":"tuple[]"}],"name":"multiRevoke","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"schema","type":"bytes32"},{"components":[{"internalType":"bytes32","name":"uid","type":"bytes32"},{"internalType":"uint256","name":"value","type":"uint256"}],"internalType":"struct RevocationRequestData[]","name":"data","type":"tuple[]"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct Signature[]","name":"signatures","type":"tuple[]"},{"internalType":"address","name":"revoker","type":"address"},{"internalType":"uint64","name":"deadline","type":"uint64"}],"internalType":"struct MultiDelegatedRevocationRequest[]","name":"multiDelegatedRequests","type":"tuple[]"}],"name":"multiRevokeByDelegation","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"data","type":"bytes32[]"}],"name":"multiRevokeOffchain","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"data","type":"bytes32[]"}],"name":"multiTimestamp","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"schema","type":"bytes32"},{"components":[{"internalType":"bytes32","name":"uid","type":"bytes32"},{"internalType":"uint256","name":"value","type":"uint256"}],"internalType":"struct RevocationRequestData","name":"data","type":"tuple"}],"internalType":"struct RevocationRequest","name":"request","type":"tuple"}],"name":"revoke","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"schema","type":"bytes32"},{"components":[{"internalType":"bytes32","name":"uid","type":"bytes32"},{"internalType":"uint256","name":"value","type":"uint256"}],"internalType":"struct RevocationRequestData","name":"data","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"internalType":"struct Signature","name":"signature","type":"tuple"},{"internalType":"address","name":"revoker","type":"address"},{"internalType":"uint64","name":"deadline","type":"uint64"}],"internalType":"struct DelegatedRevocationRequest","name":"delegatedRequest","type":"tuple"}],"name":"revokeByDelegation","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"data","type":"bytes32"}],"name":"revokeOffchain","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"data","type":"bytes32"}],"name":"timestamp","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"}]

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0000000000000000000000005ece93be4bdcf293ed61fa78698b594f2135af34

-----Decoded View---------------
Arg [0] : registry (address): 0x5ece93bE4BDCF293Ed61FA78698B594F2135AF34

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000005ece93be4bdcf293ed61fa78698b594f2135af34