/**
 * Signature base construction per RFC 9421 Section 2.5.
 *
 * The signature base is a canonical string constructed from
 * covered components and signature parameters.
 */
import { ParsedSignatureParams, SignatureRequest } from './types.js';
/**
 * Build signature base string for verification.
 *
 * @param request - Request data
 * @param params - Parsed signature parameters
 * @returns Signature base string
 */
export declare function buildSignatureBase(request: SignatureRequest, params: ParsedSignatureParams, options?: {
    preferSerializedParams?: boolean;
}): string;
/**
 * Convert signature base string to bytes for cryptographic verification.
 */
export declare function signatureBaseToBytes(signatureBase: string): Uint8Array;
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