/**
 * @license
 * @preserve
 *
 * KeeeX SAS Public code
 * https://keeex.me
 * Copyright 2013-2023 KeeeX All Rights Reserved.
 * 
 * These computer program listings and specifications, herein,
 * are and remain the property of KeeeX SAS. The intellectual
 * and technical concepts herein are proprietary to KeeeX SAS
 * and may be covered by EU and foreign patents,
 * patents in process, trade secrets and copyright law.
 * 
 * These listings are published as a way to provide third party
 * with the ability to process KeeeX data.
 * As such, support for public inquiries is limited.
 * They are provided "as-is", without warrany of any kind.
 * 
 * They shall not be reproduced or copied or used in whole or
 * in part as the basis for manufacture or sale of items unless
 * prior written permission is obtained from KeeeX SAS.
 * 
 * For a license agreement, please contact:
 * <mailto: contact@keeex.net>
 * 
 */
import { type TypePredicate } from "@keeex/utils/types/types.js";
import { SignatureFormat } from "./io.js";
/** Common option to generate signature */
export interface SignatureSettings<MessageFormat> {
    /** Output format (default to utf8) */
    encoding?: SignatureFormat;
    /**
     * Message handling.
     *
     * Values are specific to each key type, and each have a default value.
     */
    messageType?: MessageFormat;
}
export declare const isSignatureSettings: <MessageFormat>(messageFormatPredicate: TypePredicate<MessageFormat>) => TypePredicate<SignatureSettings<MessageFormat>>;
export interface SignatureSettingsBuf8<MessageFormat> extends SignatureSettings<MessageFormat> {
    encoding: SignatureFormat.raw;
}
export interface SignatureSettingsUtf8<MessageFormat> extends SignatureSettings<MessageFormat> {
    encoding: SignatureFormat.utf8;
}
export declare enum KeyType {
    bitcoin = "bitcoin",
    ethereum = "ethereum",
    x509 = "x509"
}
export declare const keyTypeFromString: (typeStr: string) => KeyType;