/// <reference types="node" />
import { BehaviorSubject } from "rxjs";
import { ByzCoinRPC, InstanceID, IStorage } from "@dedis/cothority/byzcoin";
import { IdentityDarc } from "@dedis/cothority/darc";
import { LongTermSecret } from "@dedis/cothority/calypso";
import { AddressBook } from "./addressBook";
import { CoinBS, DarcBS, DarcsBS } from "./byzcoin";
import { CredentialSignerBS, CSTypesBS } from "./credentialSignerBS";
import { CredentialInstanceMapBS, CredentialPublic, CredentialStructBS } from "./credentialStructBS";
import { KeyPair } from "./keypair";
import { User } from "./user";
/**
 * Fetcher implements convenience methods to get instances needed for a credential.
 * This class can retrieve different instances from a ByzCoin chain.
 * All methods retrieve the information from ByzCoin.
 *
 * The use of `dbBase` is to allow for different users in the same IStorage.
 */
export declare class Fetcher {
    bc: ByzCoinRPC;
    db: IStorage;
    constructor(bc: ByzCoinRPC, db: IStorage);
    retrieveUser(credID: InstanceID, privBuf: Buffer, dbBase?: string): Promise<User>;
    retrieveUserByEphemeral(ephemeral: KeyPair, dbBase?: string): Promise<User>;
    retrieveUserByURL(urlStr: string, dbBase?: string): Promise<User>;
    retrieveUserByDB(dbBase?: string): Promise<User>;
    retrieveUserKeyCredID(dbBase?: string): Promise<[Buffer, Buffer]>;
    retrieveAddressBook(cp: CredentialPublic): Promise<AddressBook>;
    retrieveCoinBS(coinID: BehaviorSubject<InstanceID> | InstanceID): Promise<CoinBS>;
    retrieveCredentialSignerBS(credStructBS: CredentialStructBS): Promise<CredentialSignerBS>;
    retrieveCST(signerBS: DarcBS, cimbs: CredentialInstanceMapBS, prefix: string): Promise<CSTypesBS>;
    retrieveCredentialStructBS(id: InstanceID): Promise<CredentialStructBS | undefined>;
    retrieveDarcsBS(aisbs: BehaviorSubject<InstanceID[]>): Promise<DarcsBS>;
    retrieveDarcBS(darcID: BehaviorSubject<InstanceID> | InstanceID): Promise<DarcBS | undefined>;
    retrieveSignerIdentityDarc(credDarcID: InstanceID): Promise<IdentityDarc>;
    retrieveLTS(ltsid: InstanceID): Promise<LongTermSecret>;
}