/**
 * Interface for objects that represent API Access Tokens.
 */
export interface IAccessToken {
    /**
     * Retrieves user's identity from the token.
     * @returns {string}
     */
    identity(): string;
    /**
     * Returns the string representation of the token.
     * @returns {string}
     */
    toString(): string;
}
/**
 * Interface for objects that provide context to the
 * {@link IAccessTokenProvider} implementations, i.e. which operation
 * is being performed, identity of the user performing the operation
 * and whether to force a new token to be retrieved in case the tokens
 * are being cached by the provider.
 */
export interface ITokenContext {
    /**
     * Name of the Service requested.
     */
    readonly service: string;
    /**
     * Identity of the user performing the operation that
     * requires Access Token. May be `undefined`.
     */
    readonly identity?: string;
    /**
     * Name of the operation that requires an Access Token.
     */
    readonly operation: string;
    /**
     * Indicates whether to force a new token to be retrieved in case the
     * tokens are being cached by the provider.
     */
    readonly forceReload?: boolean;
}
/**
 * Interface to be implemented by classes able to provide API
 * Access Tokens asynchronously.
 */
export interface IAccessTokenProvider {
    /**
     * Provides an API Access Token asynchronously.
     *
     * @param {ITokenContext} context - The context object describing the
     * operation for which the token is needed.
     *
     * @returns {Promise<IAccessToken>}
     */
    getToken(context: ITokenContext): Promise<IAccessToken>;
}