import { ExtData } from './ExtData';
export declare type ExtensionDecoderType = (data: Uint8Array, extensionType: number) => unknown;
export declare type ExtensionEncoderType<T> = (input: T) => Uint8Array;
export declare type ExtensionIdentifier = (ext: unknown) => boolean;
export interface ExtensionCodecType {
    encode(object: unknown): ExtData;
    decode(data: Uint8Array, extType: number): unknown;
}
export declare class ExtensionCodec implements ExtensionCodecType {
    static readonly defaultCodec: ExtensionCodecType;
    private readonly encoders;
    private readonly decoders;
    private readonly identifiers;
    register<EncodeType>({ type, identifier, encode, decode, }: {
        type: number;
        identifier: ExtensionIdentifier;
        encode: ExtensionEncoderType<EncodeType>;
        decode: ExtensionDecoderType;
    }): void;
    encode(object: unknown): ExtData;
    decode(data: Uint8Array, type: number): unknown;
}