org.web3j.crypto

Class ContractUtils

java.lang.Object

org.web3j.crypto.ContractUtils

public class ContractUtils
extends java.lang.Object

Smart Contract utility functions.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ADDRESS_BYTE_SIZE
static int	SALT_SIZE

Constructor Summary

Constructors

Constructor and Description
ContractUtils()

Method Summary

Modifier and Type	Method and Description
static byte[]	generateContractAddress(byte[] address, java.math.BigInteger nonce) Generate a smart contract address.
static java.lang.String	generateContractAddress(java.lang.String address, java.math.BigInteger nonce)
static byte[]	generateCreate2ContractAddress(byte[] address, byte[] salt, byte[] initCode) Generate a CREATE2 smart contract address.
static java.lang.String	generateCreate2ContractAddress(java.lang.String address, byte[] salt, byte[] initCode)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SALT_SIZE

public static final int SALT_SIZE

See Also:

Constant Field Values

ADDRESS_BYTE_SIZE

public static final int ADDRESS_BYTE_SIZE

See Also:

Constant Field Values

Constructor Detail

ContractUtils

public ContractUtils()

Method Detail

generateContractAddress

public static byte[] generateContractAddress(byte[] address,
                                             java.math.BigInteger nonce)

Generate a smart contract address. This enables you to identify what address a smart contract will be deployed to on the network.

Parameters:

address - of sender

nonce - of transaction

Returns:

the generated smart contract address

generateContractAddress

public static java.lang.String generateContractAddress(java.lang.String address,
                                                       java.math.BigInteger nonce)

generateCreate2ContractAddress

public static byte[] generateCreate2ContractAddress(byte[] address,
                                                    byte[] salt,
                                                    byte[] initCode)

Generate a CREATE2 smart contract address. Further details are available here.

Parameters:

address - The address which is creating this new address

salt - A 32 bytes salt

initCode - The init code of the contract being created

Returns:

the generated CREATE2 smart contract address

generateCreate2ContractAddress

public static java.lang.String generateCreate2ContractAddress(java.lang.String address,
                                                              byte[] salt,
                                                              byte[] initCode)