/**
 * Copyright (c) 2025, WSO2 LLC. (https://www.wso2.com).
 *
 * WSO2 LLC. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/**
 * Constants related to Proof Key for Code Exchange (PKCE) implementation.
 * This object contains all the necessary constants for implementing PKCE
 * flow in the OAuth 2.0 authorization code grant.
 *
 * @remarks
 * PKCE is an extension to the authorization code flow to prevent CSRF and
 * authorization code injection attacks. The constants are organized into
 * storage-related sections for managing PKCE state.
 *
 * @example
 * ```typescript
 * // Using storage keys
 * const codeVerifierKey = PKCEConstants.Storage.StorageKeys.CODE_VERIFIER;
 * const separator = PKCEConstants.Storage.StorageKeys.SEPARATOR;
 * ```
 */
declare const PKCEConstants: {
    readonly DEFAULT_CODE_CHALLENGE_METHOD: string;
    readonly Storage: {
        readonly StorageKeys: {
            readonly CODE_VERIFIER: string;
            readonly SEPARATOR: string;
        };
    };
};
export default PKCEConstants;
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