/**
 * Sets the signature to be used to authenticate the current user. You can also set the signature when calling [[`changeUser`]].
 * This signature will only have an effect if the `enableSdkAuthentication` initialization option is set to true.
 *
 * @param signature - The signature to add to network requests to authenticate the current user.
 *
 * @returns Whether or not the signature is valid.
 */
export declare function setSdkAuthenticationSignature(signature: string): Promise<boolean>;