export type RequestInvitationEmailChallenge = Readonly<{
    invitationId: string;
    token: string;
    challengeId: string;
    confirm: true;
}>;
export type AcceptInvitationEmailChallenge = RequestInvitationEmailChallenge & Readonly<{
    code: string;
}>;
export type RemoteInvitationEmailChallenge = {
    challengeId: string;
    message: string;
    expiresIn: 600;
};
export type RemoteInvitationEmailAcceptance = {
    organizationId: string;
    membershipId: string;
    accepted: true;
    changed: true;
    signInRequired: true;
};
export declare class InvitationEmailInputError extends Error {
    readonly code = "INVITATION_EMAIL_INPUT_INVALID";
    constructor();
}
declare const refusals: {
    readonly INVALID_REQUEST: readonly [400, "Invitation recovery parameters were refused."];
    readonly ORIGIN_REQUIRED: readonly [403, "Invitation recovery requires the configured site origin."];
    readonly INVITATION_PROOF_UNAVAILABLE: readonly [401, "Invitation proof is unavailable. Sign in or explicitly request another recovery code."];
    readonly RATE_LIMITED: readonly [429, "Invitation verification is rate limited. Wait before another deliberate action."];
    readonly INVITATION_BUSY: readonly [503, "Invitation is busy. Sign in to check membership before another deliberate action."];
    readonly INVITATION_DELIVERY_UNAVAILABLE: readonly [503, "Invitation recovery is unavailable on this service."];
};
export type RemoteInvitationEmailErrorCode = keyof typeof refusals;
export declare class RemoteInvitationEmailError extends Error {
    readonly code: RemoteInvitationEmailErrorCode;
    readonly status: number;
    constructor(code: RemoteInvitationEmailErrorCode);
}
export declare class RemoteInvitationEmailUnconfirmedError extends Error {
    readonly action: "challenge" | "accept";
    readonly code = "INVITATION_EMAIL_UNCONFIRMED";
    constructor(action: "challenge" | "accept");
}
export declare function invitationEmailIds(invitationId: unknown, challengeId: unknown): {
    invitationId: string;
    challengeId: string;
};
export declare function invitationEmailInput<A extends "challenge" | "accept">(action: A, input: A extends "accept" ? AcceptInvitationEmailChallenge : RequestInvitationEmailChallenge): {
    code?: string | undefined;
    token: string;
    confirm: true;
    invitationId: string;
    challengeId: string;
};
/** Explicit anonymous protocol: no auth resolver, headers, session creation or persistence. */
export declare function requestInvitationEmail<A extends "challenge" | "accept">(origin: string, action: A, input: A extends "accept" ? AcceptInvitationEmailChallenge : RequestInvitationEmailChallenge): Promise<A extends "accept" ? RemoteInvitationEmailAcceptance : RemoteInvitationEmailChallenge>;
export declare function invitationEmailCustomerError(error: unknown): {
    code: string;
    error: string;
};
export {};