/** Protocol version — bumped on breaking changes to the wire format. The SW
 *  compares versions during the handshake and refuses to route if they diverge
 *  (the extension and SDK weren't updated at the same time). */
export declare const PROTOCOL_VERSION: 1;
/** Cancel message: the client sent cancel(id), the server looks up the matching
 *  AbortController among the active requests and aborts it. Has no response —
 *  fire-and-forget. */
export interface CancelEnvelope {
    type: 'cancel';
    id: string;
}
export type RequestKind = 'billing.bootstrap' | 'billing.getCachedBootstrap' | 'billing.getUser' | 'billing.getCachedUser' | 'billing.getSettledUser' | 'billing.getBalances' | 'billing.getCachedBalances' | 'billing.createCheckout' | 'billing.listPurchases' | 'billing.cancelSubscription' | 'billing.getCustomerPortalUrl' | 'billing.getIdentity' | 'billing.setIdentity' | 'billing.getVisitorId' | 'billing.stageSupportFile' | 'billing.createSupportTicket' | 'auth.signInWithEmail' | 'auth.signUp' | 'auth.signOut' | 'auth.getCachedSession' | 'auth.refresh' | 'auth.requestPasswordReset' | 'auth.updatePassword' | 'auth.sendOtp' | 'auth.verifyOtp' | 'auth.resendConfirmation' | 'auth.revokeAllSessions' | 'auth.oauthStart' | 'auth.oauthExchange' | 'auth.oauthAdopt' | 'auth.getAccessToken' | 'auth.signInAnonymously' | 'auth.getLastLogin' | 'tracker.track' | 'storage.get' | 'storage.set' | 'storage.remove' | 'trial.check' | 'trial.recordBlock' | 'trial.reset' | 'handshake' | 'subscribe' | 'unsubscribe';
export interface RequestEnvelope<P = unknown> {
    type: 'request';
    id: string;
    kind: RequestKind;
    params: P;
}
export interface ResponseOk<R = unknown> {
    type: 'response';
    id: string;
    ok: true;
    result: R;
}
export interface ResponseErr {
    type: 'response';
    id: string;
    ok: false;
    error: SerializedError;
}
export type ResponseEnvelope<R = unknown> = ResponseOk<R> | ResponseErr;
export type EventKind = 'userChange' | 'authChange' | 'balancesChange';
export interface EventEnvelope<P = unknown> {
    type: 'event';
    kind: EventKind;
    payload: P;
}
/** A flat snapshot of PaywallError that survives structured cloning. The
 *  reconstruct happens in RemoteBillingClient via `new PaywallError(...)` — so
 *  that the host's `error instanceof PaywallError` works as usual. */
export interface SerializedError {
    name: string;
    code: string;
    message: string;
    status?: number;
    /** Stack from offscreen — for debugging in the content-script's DevTools. */
    stack?: string;
}
export type Envelope = RequestEnvelope | ResponseEnvelope | EventEnvelope | CancelEnvelope;
export type RequestParams<K extends RequestKind> = K extends keyof RequestParamsMap ? RequestParamsMap[K] : unknown;
export type RequestResult<K extends RequestKind> = K extends keyof RequestResultMap ? RequestResultMap[K] : unknown;
export type EventPayload<K extends EventKind> = K extends keyof EventPayloadMap ? EventPayloadMap[K] : unknown;
export interface RequestParamsMap {
}
export interface RequestResultMap {
}
export interface EventPayloadMap {
}
//# sourceMappingURL=protocol.d.ts.map