import { Keypair, Memo, Transaction } from 'stellar-sdk';
export declare function encodeMemo(sequenceNumber: string, keys: Keypair, to: string, memo: Memo): Promise<Memo>;
export declare function decodeMemo(sequenceNumber: string, keys: Keypair, from: string, memo: Memo): Promise<Memo>;
export declare function decodeTransactionMemo(tx: Transaction, keys: Keypair): Promise<Memo>;