/**
 * JCS RFC 8785 canonicalisation with the AlgoVoi-discipline rules.
 *
 * The canonicalisation discipline is the shared normative substrate for
 * x402, AP2, A2A, and MPP receipts, authored by AlgoVoi and proposed in PR #2453 in
 * x402-foundation/x402 (sole AlgoVoi authorship; replaces closed PR #2436). This module
 * wraps the `canonicalize` npm package (v3.0.0) with the discipline's
 * pre-canonicalisation rules.
 *
 * Reference matrix: https://gist.github.com/chopmob-cloud/b327814c4e17ed9fc7b4f29c8bda523c
 */
/**
 * Pin the discipline version. Receipts emitted under this substrate carry
 * this string in their canon_version field so a year-five verifier can pick
 * the correct re-canonicalisation rule from the retained bytes alone.
 */
export declare const CANON_VERSION: "jcs-rfc8785-v1";
export declare class CanonicalizationError extends Error {
    constructor(message: string);
}
/**
 * Return the canonical JCS string representation of obj.
 *
 * Applies AlgoVoi-discipline pre-canonicalisation type validation, then
 * delegates to canonicalize (RFC 8785) for the canonical bytes.
 *
 * Throws CanonicalizationError on type-validation failure.
 */
export declare function canonicalize(obj: unknown): string;
/**
 * Return the canonical JCS UTF-8 bytes of obj as a Uint8Array.
 */
export declare function canonicalizeBytes(obj: unknown): Uint8Array;
/**
 * Return the lowercase hex SHA-256 of the JCS canonical bytes of obj.
 *
 * This is the substrate primitive used by action_ref, compliance receipts,
 * audit chain entries, and the composite trust-query algorithm. The string
 * is plain hex without an algorithm prefix.
 */
export declare function sha256Jcs(obj: unknown): string;
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