export type OwnerIdentity = {
  pid: number;
  startedAt: string;
  sessionKey: string;
  token?: string;
  pidStartTime?: string;
};

export function stateDir(): string;
export function statePath(root: string, me: string): string;
export function lockPath(root: string, me: string): string;
export function backupPath(root: string, me: string): string;
export function claim(options: {
  root: string;
  me: string;
  pid: number;
  startedAt: string;
  sessionKey: string;
  token?: string;
}): Promise<{ owner: boolean; identity?: OwnerIdentity; currentOwner?: OwnerIdentity | null }>;
export function release(options: {
  root: string;
  me: string;
  identity: OwnerIdentity;
  clearActiveId?: boolean;
}): Promise<boolean>;
export function currentOwner(root: string, me: string): Promise<OwnerIdentity | null>;
export function isOwner(root: string, me: string, identity: OwnerIdentity): Promise<boolean>;
export function sameOwnerIdentity(a: OwnerIdentity | null, b: OwnerIdentity | null): boolean;
export function appendProcessedIds(root: string, me: string, ids: string[]): Promise<string[]>;
export function processedIds(root: string, me: string): Promise<string[]>;
export function hasProcessed(root: string, me: string, id: string): Promise<boolean>;
export function setActiveId(root: string, me: string, id: string | null): Promise<void>;
export function pushActiveId(root: string, me: string, id: string, options?: { expectedActiveId?: string | null; deferOnLimit?: boolean }): Promise<{ pushed: boolean; activeId: string | null; reason: string | null }>;
export function popActiveId(root: string, me: string, id: string): Promise<{ popped: boolean; activeId: string | null }>;
export function removeActiveId(root: string, me: string, id: string): Promise<{ removed: boolean; activeId: string | null }>;
export function setActiveIdIfIdle(root: string, me: string, id: string): Promise<{ activated: boolean; activeId: string }>;
export function resumeCompletedActiveStack(root: string, me: string): Promise<{ changed: boolean; activeId: string | null; stack: string[] }>;
export function getActiveStack(root: string, me: string): Promise<string[]>;
export function getActiveId(root: string, me: string): Promise<string | null>;
export function resetActiveId(root: string, me: string): Promise<void>;
export function getMigrated0002(root: string, me: string): Promise<boolean>;
export function setMigrated0002(root: string, me: string, flag: boolean): Promise<void>;
export function beginMigration(root: string, me: string): Promise<boolean>;