// File: contracts/rrp/AirnodeRrpV0.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;

import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "./AuthorizationUtilsV0.sol";
import "./TemplateUtilsV0.sol";
import "./WithdrawalUtilsV0.sol";
import "./interfaces/IAirnodeRrpV0.sol";

/// @title Contract that implements the Airnode request–response protocol (RRP)
contract AirnodeRrpV0 is
    AuthorizationUtilsV0,
    TemplateUtilsV0,
    WithdrawalUtilsV0,
    IAirnodeRrpV0
{
    using ECDSA for bytes32;

    /// @notice Called to get the sponsorship status for a sponsor–requester
    /// pair
    mapping(address => mapping(address => bool))
        public
        override sponsorToRequesterToSponsorshipStatus;

    /// @notice Called to get the request count of the requester plus one
    /// @dev Can be used to calculate the ID of the next request the requester
    /// will make
    mapping(address => uint256) public override requesterToRequestCountPlusOne;

    /// @dev Hash of expected fulfillment parameters are kept to verify that
    /// the fulfillment will be done with the correct parameters. This value is
    /// also used to check if the fulfillment for the particular request is
    /// expected, i.e., if there are recorded fulfillment parameters.
    mapping(bytes32 => bytes32) private requestIdToFulfillmentParameters;

    /// @notice Called by the sponsor to set the sponsorship status of a
    /// requester, i.e., allow or disallow a requester to make requests that
    /// will be fulfilled by the sponsor wallet
    /// @dev This is not Airnode-specific, i.e., the sponsor allows the
    /// requester's requests to be fulfilled through its sponsor wallets across
    /// all Airnodes
    /// @param requester Requester address
    /// @param sponsorshipStatus Sponsorship status
    function setSponsorshipStatus(address requester, bool sponsorshipStatus)
        external
        override
    {
        // Initialize the requester request count for consistent request gas
        // cost
        if (requesterToRequestCountPlusOne[requester] == 0) {
            requesterToRequestCountPlusOne[requester] = 1;
        }
        sponsorToRequesterToSponsorshipStatus[msg.sender][
            requester
        ] = sponsorshipStatus;
        emit SetSponsorshipStatus(msg.sender, requester, sponsorshipStatus);
    }

    /// @notice Called by the requester to make a request that refers to a
    /// template for the Airnode address, endpoint ID and parameters
    /// @dev `fulfillAddress` is not allowed to be the address of this
    /// contract. This is not actually needed to protect users that use the
    /// protocol as intended, but it is done for good measure.
    /// @param templateId Template ID
    /// @param sponsor Sponsor address
    /// @param sponsorWallet Sponsor wallet that is requested to fulfill the
    /// request
    /// @param fulfillAddress Address that will be called to fulfill
    /// @param fulfillFunctionId Signature of the function that will be called
    /// to fulfill
    /// @param parameters Parameters provided by the requester in addition to
    /// the parameters in the template
    /// @return requestId Request ID
    function makeTemplateRequest(
        bytes32 templateId,
        address sponsor,
        address sponsorWallet,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes calldata parameters
    ) external override returns (bytes32 requestId) {
        address airnode = templates[templateId].airnode;
        // If the Airnode address of the template is zero the template does not
        // exist because template creation does not allow zero Airnode address
        require(airnode != address(0), "Template does not exist");
        require(fulfillAddress != address(this), "Fulfill address AirnodeRrp");
        require(
            sponsorToRequesterToSponsorshipStatus[sponsor][msg.sender],
            "Requester not sponsored"
        );
        uint256 requesterRequestCount = requesterToRequestCountPlusOne[
            msg.sender
        ];
        requestId = keccak256(
            abi.encodePacked(
                block.chainid,
                address(this),
                msg.sender,
                requesterRequestCount,
                templateId,
                sponsor,
                sponsorWallet,
                fulfillAddress,
                fulfillFunctionId,
                parameters
            )
        );
        requestIdToFulfillmentParameters[requestId] = keccak256(
            abi.encodePacked(
                airnode,
                sponsorWallet,
                fulfillAddress,
                fulfillFunctionId
            )
        );
        requesterToRequestCountPlusOne[msg.sender]++;
        emit MadeTemplateRequest(
            airnode,
            requestId,
            requesterRequestCount,
            block.chainid,
            msg.sender,
            templateId,
            sponsor,
            sponsorWallet,
            fulfillAddress,
            fulfillFunctionId,
            parameters
        );
    }

    /// @notice Called by the requester to make a full request, which provides
    /// all of its parameters as arguments and does not refer to a template
    /// @dev `fulfillAddress` is not allowed to be the address of this
    /// contract. This is not actually needed to protect users that use the
    /// protocol as intended, but it is done for good measure.
    /// @param airnode Airnode address
    /// @param endpointId Endpoint ID (allowed to be `bytes32(0)`)
    /// @param sponsor Sponsor address
    /// @param sponsorWallet Sponsor wallet that is requested to fulfill
    /// the request
    /// @param fulfillAddress Address that will be called to fulfill
    /// @param fulfillFunctionId Signature of the function that will be called
    /// to fulfill
    /// @param parameters All request parameters
    /// @return requestId Request ID
    function makeFullRequest(
        address airnode,
        bytes32 endpointId,
        address sponsor,
        address sponsorWallet,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes calldata parameters
    ) external override returns (bytes32 requestId) {
        require(airnode != address(0), "Airnode address zero");
        require(fulfillAddress != address(this), "Fulfill address AirnodeRrp");
        require(
            sponsorToRequesterToSponsorshipStatus[sponsor][msg.sender],
            "Requester not sponsored"
        );
        uint256 requesterRequestCount = requesterToRequestCountPlusOne[
            msg.sender
        ];
        requestId = keccak256(
            abi.encodePacked(
                block.chainid,
                address(this),
                msg.sender,
                requesterRequestCount,
                airnode,
                endpointId,
                sponsor,
                sponsorWallet,
                fulfillAddress,
                fulfillFunctionId,
                parameters
            )
        );
        requestIdToFulfillmentParameters[requestId] = keccak256(
            abi.encodePacked(
                airnode,
                sponsorWallet,
                fulfillAddress,
                fulfillFunctionId
            )
        );
        requesterToRequestCountPlusOne[msg.sender]++;
        emit MadeFullRequest(
            airnode,
            requestId,
            requesterRequestCount,
            block.chainid,
            msg.sender,
            endpointId,
            sponsor,
            sponsorWallet,
            fulfillAddress,
            fulfillFunctionId,
            parameters
        );
    }

    /// @notice Called by Airnode to fulfill the request (template or full)
    /// @dev The data is ABI-encoded as a `bytes` type, with its format
    /// depending on the request specifications.
    /// This will not revert depending on the external call. However, it will
    /// return `false` if the external call reverts or if there is no function
    /// with a matching signature at `fulfillAddress`. On the other hand, it
    /// will return `true` if the external call returns successfully or if
    /// there is no contract deployed at `fulfillAddress`.
    /// If `callSuccess` is `false`, `callData` can be decoded to retrieve the
    /// revert string.
    /// This function emits its event after an untrusted low-level call,
    /// meaning that the order of these events within the transaction should
    /// not be taken seriously, yet the content will be sound.
    /// @param requestId Request ID
    /// @param airnode Airnode address
    /// @param data Fulfillment data
    /// @param fulfillAddress Address that will be called to fulfill
    /// @param fulfillFunctionId Signature of the function that will be called
    /// to fulfill
    /// @return callSuccess If the fulfillment call succeeded
    /// @return callData Data returned by the fulfillment call (if there is
    /// any)
    function fulfill(
        bytes32 requestId,
        address airnode,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes calldata data,
        bytes calldata signature
    ) external override returns (bool callSuccess, bytes memory callData) {
        require(
            keccak256(
                abi.encodePacked(
                    airnode,
                    msg.sender,
                    fulfillAddress,
                    fulfillFunctionId
                )
            ) == requestIdToFulfillmentParameters[requestId],
            "Invalid request fulfillment"
        );
        require(
            (
                keccak256(abi.encodePacked(requestId, data))
                    .toEthSignedMessageHash()
            ).recover(signature) == airnode,
            "Invalid signature"
        );
        delete requestIdToFulfillmentParameters[requestId];
        (callSuccess, callData) = fulfillAddress.call( // solhint-disable-line avoid-low-level-calls
            abi.encodeWithSelector(fulfillFunctionId, requestId, data)
        );
        if (callSuccess) {
            emit FulfilledRequest(airnode, requestId, data);
        } else {
            // We do not bubble up the revert string from `callData`
            emit FailedRequest(
                airnode,
                requestId,
                "Fulfillment failed unexpectedly"
            );
        }
    }

    /// @notice Called by Airnode if the request cannot be fulfilled
    /// @dev Airnode should fall back to this if a request cannot be fulfilled
    /// because static call to `fulfill()` returns `false` for `callSuccess`
    /// @param requestId Request ID
    /// @param airnode Airnode address
    /// @param fulfillAddress Address that will be called to fulfill
    /// @param fulfillFunctionId Signature of the function that will be called
    /// to fulfill
    /// @param errorMessage A message that explains why the request has failed
    function fail(
        bytes32 requestId,
        address airnode,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        string calldata errorMessage
    ) external override {
        require(
            keccak256(
                abi.encodePacked(
                    airnode,
                    msg.sender,
                    fulfillAddress,
                    fulfillFunctionId
                )
            ) == requestIdToFulfillmentParameters[requestId],
            "Invalid request fulfillment"
        );
        delete requestIdToFulfillmentParameters[requestId];
        emit FailedRequest(airnode, requestId, errorMessage);
    }

    /// @notice Called to check if the request with the ID is made but not
    /// fulfilled/failed yet
    /// @dev If a requester has made a request, received a request ID but did
    /// not hear back, it can call this method to check if the Airnode has
    /// called back `fail()` instead.
    /// @param requestId Request ID
    /// @return isAwaitingFulfillment If the request is awaiting fulfillment
    /// (i.e., `true` if `fulfill()` or `fail()` is not called back yet,
    /// `false` otherwise)
    function requestIsAwaitingFulfillment(bytes32 requestId)
        external
        view
        override
        returns (bool isAwaitingFulfillment)
    {
        isAwaitingFulfillment =
            requestIdToFulfillmentParameters[requestId] != bytes32(0);
    }
}

// File: @openzeppelin/contracts/utils/cryptography/ECDSA.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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
    }

    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");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' 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) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        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.
            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 if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } 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;
        uint8 v;
        assembly {
            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
            v := add(shr(255, vs), 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 (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // 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) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @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) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// File: contracts/rrp/AuthorizationUtilsV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./interfaces/IAuthorizationUtilsV0.sol";
import "../authorizers/interfaces/IAuthorizerV0.sol";

/// @title Contract that implements authorization checks
contract AuthorizationUtilsV0 is IAuthorizationUtilsV0 {
    /// @notice Uses the authorizer contracts of an Airnode to decide if a
    /// request is authorized. Once an Airnode receives a request, it calls
    /// this method to determine if it should respond. Similarly, third parties
    /// can use this method to determine if a particular request would be
    /// authorized.
    /// @dev This method is meant to be called off-chain, statically by the
    /// Airnode to decide if it should respond to a request. The requester can
    /// also call it, yet this function returning true should not be taken as a
    /// guarantee of the subsequent request being fulfilled.
    /// It is enough for only one of the authorizer contracts to return true
    /// for the request to be authorized.
    /// @param authorizers Authorizer contract addresses
    /// @param airnode Airnode address
    /// @param requestId Request ID
    /// @param endpointId Endpoint ID
    /// @param sponsor Sponsor address
    /// @param requester Requester address
    /// @return status Authorization status of the request
    function checkAuthorizationStatus(
        address[] calldata authorizers,
        address airnode,
        bytes32 requestId,
        bytes32 endpointId,
        address sponsor,
        address requester
    ) public view override returns (bool status) {
        for (uint256 ind = 0; ind < authorizers.length; ind++) {
            IAuthorizerV0 authorizer = IAuthorizerV0(authorizers[ind]);
            if (
                authorizer.isAuthorizedV0(
                    requestId,
                    airnode,
                    endpointId,
                    sponsor,
                    requester
                )
            ) {
                return true;
            }
        }
        return false;
    }

    /// @notice A convenience function to make multiple authorization status
    /// checks with a single call
    /// @param authorizers Authorizer contract addresses
    /// @param airnode Airnode address
    /// @param requestIds Request IDs
    /// @param endpointIds Endpoint IDs
    /// @param sponsors Sponsor addresses
    /// @param requesters Requester addresses
    /// @return statuses Authorization statuses of the request
    function checkAuthorizationStatuses(
        address[] calldata authorizers,
        address airnode,
        bytes32[] calldata requestIds,
        bytes32[] calldata endpointIds,
        address[] calldata sponsors,
        address[] calldata requesters
    ) external view override returns (bool[] memory statuses) {
        require(
            requestIds.length == endpointIds.length &&
                requestIds.length == sponsors.length &&
                requestIds.length == requesters.length,
            "Unequal parameter lengths"
        );
        statuses = new bool[](requestIds.length);
        for (uint256 ind = 0; ind < requestIds.length; ind++) {
            statuses[ind] = checkAuthorizationStatus(
                authorizers,
                airnode,
                requestIds[ind],
                endpointIds[ind],
                sponsors[ind],
                requesters[ind]
            );
        }
    }
}

// File: contracts/rrp/TemplateUtilsV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./interfaces/ITemplateUtilsV0.sol";

/// @title Contract that implements request templates
contract TemplateUtilsV0 is ITemplateUtilsV0 {
    struct Template {
        address airnode;
        bytes32 endpointId;
        bytes parameters;
    }

    /// @notice Called to get a template
    mapping(bytes32 => Template) public override templates;

    /// @notice Creates a request template with the given parameters,
    /// addressable by the ID it returns
    /// @dev A specific set of request parameters will always have the same
    /// template ID. This means a few things: (1) You can compute the expected
    /// ID of a template before creating it, (2) Creating a new template with
    /// the same parameters will overwrite the old one and return the same ID,
    /// (3) After you query a template with its ID, you can verify its
    /// integrity by applying the hash and comparing the result with the ID.
    /// @param airnode Airnode address
    /// @param endpointId Endpoint ID (allowed to be `bytes32(0)`)
    /// @param parameters Static request parameters (i.e., parameters that will
    /// not change between requests, unlike the dynamic parameters determined
    /// at request-time)
    /// @return templateId Request template ID
    function createTemplate(
        address airnode,
        bytes32 endpointId,
        bytes calldata parameters
    ) external override returns (bytes32 templateId) {
        require(airnode != address(0), "Airnode address zero");
        templateId = keccak256(
            abi.encodePacked(airnode, endpointId, parameters)
        );
        templates[templateId] = Template({
            airnode: airnode,
            endpointId: endpointId,
            parameters: parameters
        });
        emit CreatedTemplate(templateId, airnode, endpointId, parameters);
    }

    /// @notice A convenience method to retrieve multiple templates with a
    /// single call
    /// @dev Does not revert if the templates being indexed do not exist
    /// @param templateIds Request template IDs
    /// @return airnodes Array of Airnode addresses
    /// @return endpointIds Array of endpoint IDs
    /// @return parameters Array of request parameters
    function getTemplates(bytes32[] calldata templateIds)
        external
        view
        override
        returns (
            address[] memory airnodes,
            bytes32[] memory endpointIds,
            bytes[] memory parameters
        )
    {
        airnodes = new address[](templateIds.length);
        endpointIds = new bytes32[](templateIds.length);
        parameters = new bytes[](templateIds.length);
        for (uint256 ind = 0; ind < templateIds.length; ind++) {
            Template storage template = templates[templateIds[ind]];
            airnodes[ind] = template.airnode;
            endpointIds[ind] = template.endpointId;
            parameters[ind] = template.parameters;
        }
    }
}

// File: contracts/rrp/WithdrawalUtilsV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./interfaces/IWithdrawalUtilsV0.sol";

/// @title Contract that implements logic for withdrawals from sponsor wallets
contract WithdrawalUtilsV0 is IWithdrawalUtilsV0 {
    /// @notice Called to get the withdrawal request count of the sponsor
    /// @dev Can be used to calculate the ID of the next withdrawal request the
    /// sponsor will make
    mapping(address => uint256) public override sponsorToWithdrawalRequestCount;

    /// @dev Hash of expected fulfillment parameters are kept to verify that
    /// the fulfillment will be done with the correct parameters
    mapping(bytes32 => bytes32) private withdrawalRequestIdToParameters;

    /// @notice Called by a sponsor to create a request for the Airnode to send
    /// the funds kept in the respective sponsor wallet to the sponsor
    /// @dev We do not need to use the withdrawal request parameters in the
    /// request ID hash to validate them at the node-side because all of the
    /// parameters are used during fulfillment and will get validated on-chain.
    /// The first withdrawal request a sponsor will make will cost slightly
    /// higher gas than the rest due to how the request counter is implemented.
    /// @param airnode Airnode address
    /// @param sponsorWallet Sponsor wallet that the withdrawal is requested
    /// from
    function requestWithdrawal(address airnode, address sponsorWallet)
        external
        override
    {
        bytes32 withdrawalRequestId = keccak256(
            abi.encodePacked(
                block.chainid,
                address(this),
                msg.sender,
                ++sponsorToWithdrawalRequestCount[msg.sender]
            )
        );
        withdrawalRequestIdToParameters[withdrawalRequestId] = keccak256(
            abi.encodePacked(airnode, msg.sender, sponsorWallet)
        );
        emit RequestedWithdrawal(
            airnode,
            msg.sender,
            withdrawalRequestId,
            sponsorWallet
        );
    }

    /// @notice Called by the Airnode using the sponsor wallet to fulfill the
    /// withdrawal request made by the sponsor
    /// @dev The Airnode sends the funds to the sponsor through this method
    /// to emit an event that indicates that the withdrawal request has been
    /// fulfilled
    /// @param withdrawalRequestId Withdrawal request ID
    /// @param airnode Airnode address
    /// @param sponsor Sponsor address
    function fulfillWithdrawal(
        bytes32 withdrawalRequestId,
        address airnode,
        address sponsor
    ) external payable override {
        require(
            withdrawalRequestIdToParameters[withdrawalRequestId] ==
                keccak256(abi.encodePacked(airnode, sponsor, msg.sender)),
            "Invalid withdrawal fulfillment"
        );
        delete withdrawalRequestIdToParameters[withdrawalRequestId];
        emit FulfilledWithdrawal(
            airnode,
            sponsor,
            withdrawalRequestId,
            msg.sender,
            msg.value
        );
        (bool success, ) = sponsor.call{value: msg.value}(""); // solhint-disable-line avoid-low-level-calls
        require(success, "Transfer failed");
    }
}

// File: contracts/rrp/interfaces/IAirnodeRrpV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./IAuthorizationUtilsV0.sol";
import "./ITemplateUtilsV0.sol";
import "./IWithdrawalUtilsV0.sol";

interface IAirnodeRrpV0 is
    IAuthorizationUtilsV0,
    ITemplateUtilsV0,
    IWithdrawalUtilsV0
{
    event SetSponsorshipStatus(
        address indexed sponsor,
        address indexed requester,
        bool sponsorshipStatus
    );

    event MadeTemplateRequest(
        address indexed airnode,
        bytes32 indexed requestId,
        uint256 requesterRequestCount,
        uint256 chainId,
        address requester,
        bytes32 templateId,
        address sponsor,
        address sponsorWallet,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes parameters
    );

    event MadeFullRequest(
        address indexed airnode,
        bytes32 indexed requestId,
        uint256 requesterRequestCount,
        uint256 chainId,
        address requester,
        bytes32 endpointId,
        address sponsor,
        address sponsorWallet,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes parameters
    );

    event FulfilledRequest(
        address indexed airnode,
        bytes32 indexed requestId,
        bytes data
    );

    event FailedRequest(
        address indexed airnode,
        bytes32 indexed requestId,
        string errorMessage
    );

    function setSponsorshipStatus(address requester, bool sponsorshipStatus)
        external;

    function makeTemplateRequest(
        bytes32 templateId,
        address sponsor,
        address sponsorWallet,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes calldata parameters
    ) external returns (bytes32 requestId);

    function makeFullRequest(
        address airnode,
        bytes32 endpointId,
        address sponsor,
        address sponsorWallet,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes calldata parameters
    ) external returns (bytes32 requestId);

    function fulfill(
        bytes32 requestId,
        address airnode,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        bytes calldata data,
        bytes calldata signature
    ) external returns (bool callSuccess, bytes memory callData);

    function fail(
        bytes32 requestId,
        address airnode,
        address fulfillAddress,
        bytes4 fulfillFunctionId,
        string calldata errorMessage
    ) external;

    function sponsorToRequesterToSponsorshipStatus(
        address sponsor,
        address requester
    ) external view returns (bool sponsorshipStatus);

    function requesterToRequestCountPlusOne(address requester)
        external
        view
        returns (uint256 requestCountPlusOne);

    function requestIsAwaitingFulfillment(bytes32 requestId)
        external
        view
        returns (bool isAwaitingFulfillment);
}

// File: @openzeppelin/contracts/utils/Strings.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @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] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// File: contracts/rrp/interfaces/IAuthorizationUtilsV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IAuthorizationUtilsV0 {
    function checkAuthorizationStatus(
        address[] calldata authorizers,
        address airnode,
        bytes32 requestId,
        bytes32 endpointId,
        address sponsor,
        address requester
    ) external view returns (bool status);

    function checkAuthorizationStatuses(
        address[] calldata authorizers,
        address airnode,
        bytes32[] calldata requestIds,
        bytes32[] calldata endpointIds,
        address[] calldata sponsors,
        address[] calldata requesters
    ) external view returns (bool[] memory statuses);
}

// File: contracts/authorizers/interfaces/IAuthorizerV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IAuthorizerV0 {
    function isAuthorizedV0(
        bytes32 requestId,
        address airnode,
        bytes32 endpointId,
        address sponsor,
        address requester
    ) external view returns (bool);
}

// File: contracts/rrp/interfaces/ITemplateUtilsV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ITemplateUtilsV0 {
    event CreatedTemplate(
        bytes32 indexed templateId,
        address airnode,
        bytes32 endpointId,
        bytes parameters
    );

    function createTemplate(
        address airnode,
        bytes32 endpointId,
        bytes calldata parameters
    ) external returns (bytes32 templateId);

    function getTemplates(bytes32[] calldata templateIds)
        external
        view
        returns (
            address[] memory airnodes,
            bytes32[] memory endpointIds,
            bytes[] memory parameters
        );

    function templates(bytes32 templateId)
        external
        view
        returns (
            address airnode,
            bytes32 endpointId,
            bytes memory parameters
        );
}

// File: contracts/rrp/interfaces/IWithdrawalUtilsV0.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IWithdrawalUtilsV0 {
    event RequestedWithdrawal(
        address indexed airnode,
        address indexed sponsor,
        bytes32 indexed withdrawalRequestId,
        address sponsorWallet
    );

    event FulfilledWithdrawal(
        address indexed airnode,
        address indexed sponsor,
        bytes32 indexed withdrawalRequestId,
        address sponsorWallet,
        uint256 amount
    );

    function requestWithdrawal(address airnode, address sponsorWallet) external;

    function fulfillWithdrawal(
        bytes32 withdrawalRequestId,
        address airnode,
        address sponsor
    ) external payable;

    function sponsorToWithdrawalRequestCount(address sponsor)
        external
        view
        returns (uint256 withdrawalRequestCount);
}