export type Algorithms = {
    kem: "X25519";
    kdf: "HKDF-SHA256";
    aead: "CHACHA20-POLY1305";
};
export type CreateHpkeOptions = {
    publicEntities?: "all" | "*" | string[];
    namespace: string;
    kem?: Algorithms["kem"];
    kdf?: Algorithms["kdf"];
    aead?: Algorithms["aead"];
    jwksUrl?: string;
};
import { open } from "./envelope.js";
import { generateKeyPair, selectJwkFromJwks, setJwks, type Jwks, generatePublicJwk } from "./keys.js";
export { canonicalAad, buildCanonicalAad, validateX402Core } from "./aad.js";
export { generateKeyPair, selectJwkFromJwks, generatePublicJwk, generateJwks, generateSingleJwks } from "./keys.js";
export * from "./payment.js";
export * from "./extensions.js";
export * from "./helpers.js";
export { sealChunkXChaCha, openChunkXChaCha } from "./streaming.js";
export * as X402Errors from "./errors.js";
export { CanonicalHeaders, type HeaderEntry, type TransportType } from "./constants.js";
export { x402SecureTransport } from "./x402SecureTransport.js";
export declare const X402_HPKE_VERSION: "v1";
export declare const X402_HPKE_SUITE: "X25519-HKDF-SHA256-CHACHA20POLY1305";
export declare function createHpke(opts: CreateHpkeOptions): {
    namespace: string;
    kem: "X25519";
    kdf: "HKDF-SHA256";
    aead: "CHACHA20-POLY1305";
    version: "v1";
    suite: "X25519-HKDF-SHA256-CHACHA20POLY1305";
    seal: (args: any) => Promise<{
        envelope: import("./envelope.js").Envelope;
        publicHeaders?: Record<string, string>;
        publicBody?: Record<string, any>;
    }>;
    open: (args: Parameters<typeof open>[0]) => Promise<{
        plaintext: Uint8Array;
        body?: Record<string, any>;
        headers?: Array<{
            header: string;
            value: any;
            [k: string]: any;
        }>;
    }>;
    canonicalAad: (x402: any, app?: any) => Uint8Array<ArrayBufferLike>;
    generateKeyPair: typeof generateKeyPair;
    generatePublicJwk: typeof generatePublicJwk;
    selectJwkFromJwks: typeof selectJwkFromJwks;
    fetchJwks(url?: string, ttl?: {
        minTtlMs?: number;
        maxTtlMs?: number;
    }): Promise<Jwks>;
    setJwks: typeof setJwks;
};