declare module "ext:core/ops" {
  export function op_kv_open(args: [path: string, access: string, create: boolean]): Promise<number>;
  export function op_kv_close(id: number): Promise<void>;
  export function op_kv_list_keyspaces(id: number): Promise<string[]>;
  export function op_kv_get_many(
    args: [db: number, keyspace: string, keys: Uint8Array[]],
  ): Promise<([value: Uint8Array, stamp: string] | null)[]>;
  export function op_kv_set(
    args: [db: number, keyspace: string, key: Uint8Array, value: Uint8Array],
  ): Promise<string>;
  export function op_kv_delete(args: [db: number, keyspace: string, key: Uint8Array]): Promise<void>;
  export function op_kv_list(args: {
    db: number;
    keyspace: string;
    start: Uint8Array | null;
    end: Uint8Array | null;
    prefix: Uint8Array | null;
    limit: number;
    reverse: boolean;
  }): Promise<[key: Uint8Array, value: Uint8Array, stamp: string][]>;
  export function op_kv_clear(args: [db: number, keyspace: string]): Promise<void>;
  export function op_kv_atomic(
    args: [
      db: number,
      ops: (
        | { t: "check"; ks: string; key: Uint8Array; expected: string | null }
        | { t: "set"; ks: string; key: Uint8Array; value: Uint8Array }
        | { t: "delete"; ks: string; key: Uint8Array }
      )[],
    ],
  ): Promise<[ok: boolean, stamp: string | null]>;
}