import { GrumpkinScalar } from '@aztec/foundation/curves/grumpkin';
import { BufferReader } from '@aztec/foundation/serialize';
export declare class KeyValidationHint {
    /** Master secret key used to derive sk_app and pk_m. */
    skM: GrumpkinScalar;
    constructor(
    /** Master secret key used to derive sk_app and pk_m. */
    skM: GrumpkinScalar);
    static fromBuffer(buffer: Buffer | BufferReader): KeyValidationHint;
    toBuffer(): Buffer<ArrayBufferLike>;
    static empty(): KeyValidationHint;
}
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