import type { Lock } from '../crypto/index.ts';
export type Keys = {
    readonly held: string;
    readonly vouched: string | null;
    readonly open: string;
    readonly offered: string;
};
export type HeirRecord = {
    readonly state: 'fresh';
} | ({
    readonly state: 'spent';
    readonly highest: number;
    readonly honoured: readonly number[];
} & Keys) | ({
    readonly state: 'kept';
} & Keys);
export type KeptLock = {
    readonly ek: string;
    readonly dk: string;
};
export interface Relations {
    lock(): Lock | undefined;
    setLock(lock: Lock): void;
    get(heir: string): HeirRecord | undefined;
    set(heir: string, record: HeirRecord): void;
    delete(heir: string): void;
    kept(): Promise<boolean>;
}
export declare const lockOf: (kept: KeptLock | undefined) => Lock | undefined;
export declare const keptLock: (lock: Lock) => KeptLock;
export declare const GONE = 256;
export declare class MemoryRelations implements Relations {
    #private;
    lock(): Lock | undefined;
    setLock(lock: Lock): void;
    get(heir: string): HeirRecord | undefined;
    set(heir: string, record: HeirRecord): void;
    delete(heir: string): void;
    kept(): Promise<boolean>;
}