/**
 * Metadata from OAuth 2.0 client authentication API as per
 * https://spec.matrix.org/v1.18/client-server-api/#get_matrixclientv1auth_metadata
 * With validated properties required in type
 */
export interface ValidatedAuthMetadata {
    /** List of actions that the account management URL supports. */
    account_management_actions_supported?: string[];
    /** The URL where the user is able to access the account management capabilities of the homeserver. */
    account_management_uri?: string;
    /** URL of the authorization endpoint, necessary to use the authorization code grant. */
    authorization_endpoint: string;
    /**
     * List of OAuth 2.0 Proof Key for Code Exchange (PKCE) code challenge methods that the server supports at the authorization endpoint.
     *
     * This array MUST contain at least the S256 value, for improved security in the authorization code grant.
     */
    code_challenge_methods_supported: string[];
    /** URL of the device authorization endpoint, as defined in RFC 8628, necessary to use the device authorization grant. */
    device_authorization_endpoint?: string;
    /**
     * List of OAuth 2.0 grant type strings that the server supports at the token endpoint.
     *
     * This array MUST contain at least the authorization_code and refresh_token values,
     * for clients to be able to use the authorization code grant and refresh token grant, respectively.
     */
    grant_types_supported: string[];
    /** The authorization server’s issuer identifier, which is a URL that uses the https scheme and has no query or fragment components. */
    issuer: string;
    /** List of OpenID Connect prompt values that the server supports at the authorization endpoint. */
    prompt_values_supported?: string[];
    /** URL of the client registration endpoint, necessary to perform dynamic registration of a client. */
    registration_endpoint: string;
    /**
     * List of OAuth 2.0 response mode strings that the server supports at the authorization endpoint.
     *
     * This array MUST contain at least the query and fragment values, for improved security in the authorization code grant.
     */
    response_modes_supported: string[];
    /**
     * List of OAuth 2.0 response type strings that the server supports at the authorization endpoint.
     *
     * This array MUST contain at least the code value, for clients to be able to use the authorization code grant.
     */
    response_types_supported: string[];
    /** URL of the revocation endpoint, necessary to log out a client by invalidating its access and refresh tokens. */
    revocation_endpoint: string;
    /** URL of the token endpoint, used by the grants. */
    token_endpoint: string;
}
/**
 * Validates OAuth 2.0 auth metadata as defined by
 * https://spec.matrix.org/v1.18/client-server-api/#get_matrixclientv1auth_metadata
 * @param authMetadata - json object
 * @returns boolean of whether the input is valid
 */
export declare const isValidAuthMetadata: (authMetadata: unknown) => authMetadata is ValidatedAuthMetadata;
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