/// <reference types="node" />
import { ChannelId, Value } from "@node-lightning/core";
import { MessageType } from "../MessageType";
import { IWireMessage } from "./IWireMessage";
/**
 * The `closing_signed` message is sent by the channel funder after
 * the `shutdown_message`. The funder chooses a fee it thinks
 * is fair, and signs the closing transaction with the scriptpubkey fields from
 * the shutdown messages (along with its chosen fee) and sends the signature.
 * The other node then replies similarly, using a fee it thinks is fair.
 * One of the benefits of mutual close is that the fee rate can be negotiated
 * down from the existing fee rate(which is generally expensive) to a more reasonable one.
 * In order for fee rate to converge, it has to be strictly between the last proposed
 * and the counterparty's last proposed value. This exchange continues using the
 * channelID until both agree on the same fee or when one side fails the channel.
 */
export declare class ClosingSignedMessage implements IWireMessage {
    static type: MessageType;
    /**
     * Deserializes the closing_signed message
     * @param buf
     * @returns
     */
    static deserialize(buf: Buffer): ClosingSignedMessage;
    /**
     * The type for message. Closing_Signed = 39
     */
    readonly type: MessageType;
    /**
     * ChannelId generated from the funding transactions outpoint.
     */
    channelId: ChannelId;
    /**
     * Expected value for fee_satoshis could vary how fee rate negotiations happens between the
     * two nodes.Assuming initially both nodes have different fee estimates, in every iteration
     * they should ensure fee rate is strictly between their last proposed and the counterparty's
     * last proposed value. Hence changes are made accordingly on both ends and communicated
     * between the channel until both of them comes to an agreement or when one side fails the
     * channel.
     */
    feeSatoshis: Value;
    /**
     * Sender signs the closing transaction with the scriptpubkey fields from the
     * shutdown messages (along with its chosen fee) and sends the signature;
     */
    signature: Buffer;
    /**
     * Serializes the message into a Buffer
     */
    serialize(): Buffer;
}