/**
 * HTTP Signature error codes per execution pack specification.
 */
export declare const ErrorCodes: {
    /** Signature-Input header parse failed */
    readonly SIGNATURE_INPUT_MALFORMED: "E_SIGNATURE_INPUT_MALFORMED";
    /** No Signature header present */
    readonly SIGNATURE_MISSING: "E_SIGNATURE_MISSING";
    /** Required param (created/keyid/alg) missing */
    readonly SIGNATURE_PARAM_MISSING: "E_SIGNATURE_PARAM_MISSING";
    /** Algorithm not ed25519 */
    readonly SIGNATURE_ALGORITHM_UNSUPPORTED: "E_SIGNATURE_ALGORITHM_UNSUPPORTED";
    /** Signature expired (now > expires) */
    readonly SIGNATURE_EXPIRED: "E_SIGNATURE_EXPIRED";
    /** Signature from future (created > now + skew) */
    readonly SIGNATURE_FUTURE: "E_SIGNATURE_FUTURE";
    /** Cryptographic verification failed */
    readonly SIGNATURE_INVALID: "E_SIGNATURE_INVALID";
    /** Ed25519 WebCrypto not supported */
    readonly WEBCRYPTO_UNAVAILABLE: "E_WEBCRYPTO_UNAVAILABLE";
    /** Key not found by resolver */
    readonly KEY_NOT_FOUND: "E_KEY_NOT_FOUND";
};
export type ErrorCode = (typeof ErrorCodes)[keyof typeof ErrorCodes];
/**
 * HTTP status codes for each error.
 */
export declare const ErrorHttpStatus: Record<ErrorCode, number>;
/**
 * HTTP Signature error with code and HTTP status.
 */
export declare class HttpSignatureError extends Error {
    readonly code: ErrorCode;
    readonly httpStatus: number;
    constructor(code: ErrorCode, message: string);
}
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