io.neow3j.devpack.neo

Class Contract

java.lang.Object

io.neow3j.devpack.neo.Contract

public class Contract
extends java.lang.Object

Represents a Neo smart contract and provides several contract-related methods for use in smart contracts.

Field Summary

Fields

Modifier and Type	Field and Description
byte[]	hash The contract's hash.
int	id The contract's ID.
java.lang.String	manifest The contract's manifest in JSON format.
byte[]	script The contract's VM script.
int	updateCounter The number of times the contract has been updated.

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	call(byte[] scriptHash, java.lang.String method, java.lang.Object[] arguments) Makes a call to the method of the contract with the scriptHash passing the arguments.
static java.lang.Object	call(byte[] scriptHash, java.lang.String method, java.lang.Object[] arguments, byte callFlag) Makes a call to the method of the contract with the scriptHash passing the arguments and the callFlag.
static byte	getCallFlags() Gets the call flags with which the contract has been called.

Methods inherited from class java.lang.Object

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

Field Detail

id

public final int id

The contract's ID. Each contract is assigned an ID at deployment time and is fixed.

updateCounter

public final int updateCounter

The number of times the contract has been updated.

hash

public final byte[] hash

The contract's hash.

script

public final byte[] script

The contract's VM script.

manifest

public final java.lang.String manifest

The contract's manifest in JSON format.

Method Detail

call

public static java.lang.Object call(byte[] scriptHash,
                                    java.lang.String method,
                                    java.lang.Object[] arguments)

Makes a call to the method of the contract with the scriptHash passing the arguments.

Parameters:

scriptHash - The script hash of the contract to invoke.

method - The method to call.

arguments - The arguments to hand to the method.

Returns:

the value returned by the contract method call.

call

public static java.lang.Object call(byte[] scriptHash,
                                    java.lang.String method,
                                    java.lang.Object[] arguments,
                                    byte callFlag)

Makes a call to the method of the contract with the scriptHash passing the arguments and the callFlag.

Parameters:

scriptHash - The script hash of the contract to invoke.

method - The method to call.

arguments - The arguments to hand to the method.

callFlag - The CallFlags to apply to the contract call.

Returns:

the value returned by the contract method call.

getCallFlags

public static byte getCallFlags()

Gets the call flags with which the contract has been called. I.e., use this to know with which call flags your contract is being called.

Returns:

the call flags encoded in one byte.