/**
 * Schema Normalization
 *
 * Functions to normalize receipt claims to a canonical form for comparison.
 * Produces byte-identical JCS output regardless of how the receipt was created.
 */
import type { PEACReceiptClaims, Subject } from './types.js';
import type { ParseSuccess } from './receipt-parser.js';
/**
 * Normalized core claims for comparison.
 *
 * This is the minimal set of fields that represent the semantic meaning
 * of a receipt. All optional fields that are undefined are omitted.
 */
export interface CoreClaims {
    /** Issuer URL */
    iss: string;
    /** Audience / resource URL */
    aud: string;
    /** Receipt ID */
    rid: string;
    /** Issued at timestamp */
    iat: number;
    /** Expiry timestamp (omitted if not present) */
    exp?: number;
    /** Amount in smallest currency unit (commerce receipts) */
    amt?: number;
    /** Currency code (ISO 4217, commerce receipts) */
    cur?: string;
    /** Normalized payment evidence (commerce receipts) */
    payment?: NormalizedPayment;
    /** Subject (omitted if not present) */
    subject?: Subject;
    /** Control block (omitted if not present) */
    control?: NormalizedControl;
}
/**
 * Normalized payment evidence for comparison.
 *
 * Only includes the semantic fields, not rail-specific evidence.
 */
export interface NormalizedPayment {
    rail: string;
    reference: string;
    amount: number;
    currency: string;
    asset: string;
    env: 'live' | 'test';
    network?: string;
    aggregator?: string;
    routing?: 'direct' | 'callback' | 'role';
}
/**
 * Normalized control block for comparison.
 */
export interface NormalizedControl {
    chain: NormalizedControlStep[];
}
/**
 * Normalized control step for comparison.
 */
export interface NormalizedControlStep {
    engine: string;
    result: string;
}
/**
 * Extract core claims from a receipt for comparison.
 *
 * Supports both commerce and attestation receipts. Accepts either a
 * ParseSuccess result from parseReceiptClaims() (preferred) or bare
 * PEACReceiptClaims (backward compat).
 *
 * For attestation receipts, maps sub -> subject.uri (normative mapping
 * per PEAC attestation profile -- sub is a URI identifying the
 * interaction target).
 *
 * The output:
 * - Contains only semantically meaningful fields
 * - Omits undefined optional fields (not null, not empty string)
 * - Uses consistent field ordering (JCS handles this)
 * - Strips rail-specific evidence details
 *
 * @param input - Parsed receipt result or bare commerce claims
 * @returns Normalized core claims
 *
 * @example
 * ```ts
 * import { parseReceiptClaims, toCoreClaims } from '@peac/schema';
 *
 * const parsed = parseReceiptClaims(decodedPayload);
 * if (parsed.ok) {
 *   const core = toCoreClaims(parsed);
 * }
 * ```
 */
export declare function toCoreClaims(parsed: ParseSuccess): CoreClaims;
export declare function toCoreClaims(claims: PEACReceiptClaims): CoreClaims;
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