import { Bitcoind } from '../../types';
type WalletPassphraseChangeParams = {
    bitcoind: Bitcoind;
    oldpassphrase: string;
    newpassphrase: string;
};
/**
 * walletpassphrasechange "oldpassphrase" "newpassphrase"
 *
 * Changes the wallet passphrase from 'oldpassphrase' to 'newpassphrase'.
 *
 */
export declare function walletPassphraseChange(params: WalletPassphraseChangeParams): Promise<any>;
export {};