/** A one-use ticket. Grant key, expected revision and payload slot are opaque strings. */
export interface ProviderTicket {
    readonly active: boolean;
    readonly key: string;
    readonly expected: string;
    readonly payload: string;
}
export type ProviderPlan = {
    readonly $: "Denied";
} | {
    readonly $: "Write";
    readonly key: string;
    readonly expected: string;
    readonly value: string;
};
/** Consume the ticket and plan its write, when the live grant names this key at the expected revision. */
export declare const providerTake: (ticket: ProviderTicket, key: string, observed: string, stopped: boolean) => {
    next: ProviderTicket;
    plan: ProviderPlan;
};
export declare const providerRevoke: (ticket: ProviderTicket) => ProviderTicket;
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