declare class Relay {
    static instance: Relay;
    build(data: number[] | Uint8Array | Array<number> | string | ArrayBuffer): Uint8Array<ArrayBufferLike>;
    withChecksum(arr: Uint8Array | Array<number>): number;
    static connection(channel?: number): Uint8Array<ArrayBufferLike>;
    static deactivate(channel?: number): Uint8Array<ArrayBufferLike>;
    static activate(channel?: number): Uint8Array<ArrayBufferLike>;
    static custom(data: Uint8Array | Array<number> | string | ArrayBuffer): Uint8Array<ArrayBufferLike>;
}
export { Relay };
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