import type { EnvelopeDecodeOptions, EnvelopeEncodeOptions, EnvelopeSignOptions, SignaturePayload, PayloadSpec, DecodedEnvelope, DelegationPayload, InvocationPayload, Payload } from './types.js';
import type { SignatureType } from 'iso-signatures/types';
/** Version */
export declare const VERSION = "1.0.0-rc.1";
/**
 * Get the signature payload for a given payload
 */
export declare function getSignaturePayload(options: {
    spec: PayloadSpec;
    payload: Payload;
    version?: string;
    signatureType: SignatureType;
}): SignaturePayload;
/**
 * Decode a signature payload
 */
export declare function decodeSignaturePayload(bytes: Uint8Array): {
    alg: SignatureType;
    enc: import("./types.js").VarsigEncoding;
    payload: Payload<unknown>;
};
/**
 * Check if a payload is an invocation payload
 */
export declare function isInvocationPayload(payload: Payload): payload is InvocationPayload;
/**
 * Check if a payload is a delegation payload
 */
export declare function isDelegationPayload(payload: Payload): payload is DelegationPayload;
export declare function sign(options: EnvelopeSignOptions): Promise<{
    signature: Uint8Array<ArrayBufferLike>;
    signaturePayload: SignaturePayload;
}>;
/**
 * Encode a UCAN envelope
 *
 * @see https://github.com/ucan-wg/spec#envelope
 */
export declare function encode(options: EnvelopeEncodeOptions): Uint8Array;
/**
 * Decode a UCAN envelope
 *
 * @see https://github.com/ucan-wg/spec#envelope
 */
export declare function decode<Spec extends PayloadSpec>(options: EnvelopeDecodeOptions): DecodedEnvelope<Spec>;
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