export declare class Key {
    readonly value: Uint8Array;
    constructor(value: Uint8Array);
    static from(value: Uint8Array): Key;
    static fromHex(value: string): Key;
    static fromBase64(value: string): Key;
    static fromBigInt(value: bigint): Key;
    toHex(): string;
    toPrefixedHex(): string;
    toBase64(): string;
    toBigInt(): bigint;
    toBech32(prefix: string, limit?: number): string;
    slice(start?: number, end?: number): Key;
    concat(key: Key): Key;
}