import { Signature, RawSignature, Base64, UserAddress } from "../interfaces";
export declare function getEthereumDataPrefix(dataLength: number): Uint8Array;
export declare function getEthereumAddressByPublicKey(publicKeyAddress: Uint8Array): UserAddress;
export declare function verifyEthereumSignature(signature: Signature | RawSignature, data: Uint8Array | Base64, userAddress: UserAddress): boolean;
export declare function isValidEVMTxHash(txHash: string): boolean;
export declare function isValidEthereumAddress(address: string, strict?: boolean): boolean;
export declare function toValidEthereumAddress(address: string): UserAddress;
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