import { Connection, PublicKey } from '@solana/web3.js';
export declare const validPublicKey: (input: string) => boolean;
export declare const getRentSync: (dataSize: number) => number;
export declare const getLamports: (conn: Connection, acct: PublicKey) => Promise<number | undefined>;
export declare const isUserRejectedSigningError: (err: any) => boolean;
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