OpCode (utils 2.2.0 API)

java.lang.Object
- java.lang.Enum<OpCode>
- - io.neow3j.constants.OpCode

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<OpCode>
```
public enum OpCode
extends java.lang.Enum<OpCode>
```
This class represents a subset of NEO VM opcodes.

Based on: https://github.com/neo-project/neo-vm/blob/master/src/neo-vm/OpCode.cs

Enum Constant Summary

Enum Constants
Enum Constant and Description
`APPCALL` Reads a script hash and executes the corresponding contract.
`CALL` Current context is copied to the invocation stack.
`CHECKMULTISIG` A set of n public keys (an array or value n followed by n pubkeys) is validated against a set of m signatures (an array or value m followed by m signatures).
`CHECKSIG` The publickey and signature are taken from main stack.
`HASH160` The input is hashed using Hash160: first with SHA-256 and then with RIPEMD-160.
`HASH256` The input is hashed using Hash256: twice with SHA-256.
`JMP` Reads a 2-byte value n and a jump is performed to relative position n-3.
`JMPIF` A boolean value b is taken from main stack and reads a 2-byte value n, if b is True then a jump is performed to relative position n-3.
`JMPIFNOT` A boolean value b is taken from main stack and reads a 2-byte value n, if b is False then a jump is performed to relative position n-3.
`NOP` No operation.
`PACK` A value n is taken from top of main stack.
`PUSH0` An empty array of bytes is pushed onto the stack.
`PUSH1` The number 1 is pushed onto the stack.
`PUSH10` The number 10 is pushed onto the stack.
`PUSH11` The number 11 is pushed onto the stack.
`PUSH12` The number 12 is pushed onto the stack.
`PUSH13` The number 13 is pushed onto the stack.
`PUSH14` The number 14 is pushed onto the stack.
`PUSH15` The number 15 is pushed onto the stack.
`PUSH16` The number 16 is pushed onto the stack.
`PUSH2` The number 2 is pushed onto the stack.
`PUSH3` The number 3 is pushed onto the stack.
`PUSH4` The number 4 is pushed onto the stack.
`PUSH5` The number 5 is pushed onto the stack.
`PUSH6` The number 6 is pushed onto the stack.
`PUSH7` The number 7 is pushed onto the stack.
`PUSH8` The number 8 is pushed onto the stack.
`PUSH9` The number 9 is pushed onto the stack.
`PUSHBYTES1` 0x01-0x4B The next opcode bytes is data to be pushed onto the stack.
`PUSHBYTES33`
`PUSHBYTES64`
`PUSHBYTES75`
`PUSHDATA1` The next byte contains the number of bytes to be pushed onto the stack.
`PUSHDATA2` The next two bytes contain the number of bytes to be pushed onto the stack.
`PUSHDATA4` The next four bytes contain the number of bytes to be pushed onto the stack.
`PUSHF`
`PUSHM1` The number -1 is pushed onto the stack.
`PUSHT`
`RET` Stops the execution if invocation stack is empty.
`SHA1` The input is hashed using SHA-1.
`SHA256` The input is hashed using SHA-256.
`SYSCALL` Reads a string and executes the corresponding operation.
`TAILCALL` Reads a script hash and executes the corresponding contract.
`VERIFY` The publickey, signature and message are taken from main stack.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`byte`	`getValue()`
`static java.lang.String`	`toHexString(OpCode opCode)`
`java.lang.String`	`toString()`
`static OpCode`	`valueOf(java.lang.String name)` Returns the enum constant of this type with the specified name.
`static OpCode[]`	`values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - PUSH0
```
public static final OpCode PUSH0
```
    An empty array of bytes is pushed onto the stack.
  - PUSHF
```
public static final OpCode PUSHF
```
  - PUSHBYTES1
```
public static final OpCode PUSHBYTES1
```
    0x01-0x4B The next opcode bytes is data to be pushed onto the stack.
  - PUSHBYTES33
```
public static final OpCode PUSHBYTES33
```
  - PUSHBYTES64
```
public static final OpCode PUSHBYTES64
```
  - PUSHBYTES75
```
public static final OpCode PUSHBYTES75
```
  - PUSHDATA1
```
public static final OpCode PUSHDATA1
```
    The next byte contains the number of bytes to be pushed onto the stack.
  - PUSHDATA2
```
public static final OpCode PUSHDATA2
```
    The next two bytes contain the number of bytes to be pushed onto the stack.
  - PUSHDATA4
```
public static final OpCode PUSHDATA4
```
    The next four bytes contain the number of bytes to be pushed onto the stack.
  - PUSHM1
```
public static final OpCode PUSHM1
```
    The number -1 is pushed onto the stack.
  - PUSH1
```
public static final OpCode PUSH1
```
    The number 1 is pushed onto the stack.
  - PUSHT
```
public static final OpCode PUSHT
```
  - PUSH2
```
public static final OpCode PUSH2
```
    The number 2 is pushed onto the stack.
  - PUSH3
```
public static final OpCode PUSH3
```
    The number 3 is pushed onto the stack.
  - PUSH4
```
public static final OpCode PUSH4
```
    The number 4 is pushed onto the stack.
  - PUSH5
```
public static final OpCode PUSH5
```
    The number 5 is pushed onto the stack.
  - PUSH6
```
public static final OpCode PUSH6
```
    The number 6 is pushed onto the stack.
  - PUSH7
```
public static final OpCode PUSH7
```
    The number 7 is pushed onto the stack.
  - PUSH8
```
public static final OpCode PUSH8
```
    The number 8 is pushed onto the stack.
  - PUSH9
```
public static final OpCode PUSH9
```
    The number 9 is pushed onto the stack.
  - PUSH10
```
public static final OpCode PUSH10
```
    The number 10 is pushed onto the stack.
  - PUSH11
```
public static final OpCode PUSH11
```
    The number 11 is pushed onto the stack.
  - PUSH12
```
public static final OpCode PUSH12
```
    The number 12 is pushed onto the stack.
  - PUSH13
```
public static final OpCode PUSH13
```
    The number 13 is pushed onto the stack.
  - PUSH14
```
public static final OpCode PUSH14
```
    The number 14 is pushed onto the stack.
  - PUSH15
```
public static final OpCode PUSH15
```
    The number 15 is pushed onto the stack.
  - PUSH16
```
public static final OpCode PUSH16
```
    The number 16 is pushed onto the stack.
  - NOP
```
public static final OpCode NOP
```
    No operation. Nothing is done.
  - JMP
```
public static final OpCode JMP
```
    Reads a 2-byte value n and a jump is performed to relative position n-3.
  - JMPIF
```
public static final OpCode JMPIF
```
    A boolean value b is taken from main stack and reads a 2-byte value n, if b is True then a jump is performed to relative position n-3.
  - JMPIFNOT
```
public static final OpCode JMPIFNOT
```
    A boolean value b is taken from main stack and reads a 2-byte value n, if b is False then a jump is performed to relative position n-3.
  - CALL
```
public static final OpCode CALL
```
    Current context is copied to the invocation stack. Reads a 2-byte value n and a jump is performed to relative position n-3.
  - RET
```
public static final OpCode RET
```
    Stops the execution if invocation stack is empty.
  - APPCALL
```
public static final OpCode APPCALL
```
    Reads a script hash and executes the corresponding contract. If script hash is zero, performs dynamic invoke by taking script hash from main stack.
  - SYSCALL
```
public static final OpCode SYSCALL
```
    Reads a string and executes the corresponding operation.
  - TAILCALL
```
public static final OpCode TAILCALL
```
    Reads a script hash and executes the corresponding contract. If script hash is zero, performs dynamic invoke by taking script hash from main stack. Disposes the top item on invocation stack.
  - SHA1
```
public static final OpCode SHA1
```
    The input is hashed using SHA-1.
  - SHA256
```
public static final OpCode SHA256
```
    The input is hashed using SHA-256.
  - HASH160
```
public static final OpCode HASH160
```
    The input is hashed using Hash160: first with SHA-256 and then with RIPEMD-160.
  - HASH256
```
public static final OpCode HASH256
```
    The input is hashed using Hash256: twice with SHA-256.
  - CHECKSIG
```
public static final OpCode CHECKSIG
```
    The publickey and signature are taken from main stack.
    
    Verifies if transaction was signed by given publickey and a boolean output is put on top of the main stack.
  - VERIFY
```
public static final OpCode VERIFY
```
    The publickey, signature and message are taken from main stack.
    
    Verifies if given message was signed by given publickey and a boolean output is put on top of the main stack.
  - CHECKMULTISIG
```
public static final OpCode CHECKMULTISIG
```
    A set of n public keys (an array or value n followed by n pubkeys) is validated against a set of m signatures (an array or value m followed by m signatures).
    
    Verify transaction as multisig and a boolean output is put on top of the main stack.
  - PACK
```
public static final OpCode PACK
```
    A value n is taken from top of main stack. The next n items on main stack are removed, put inside n-sized array and this array is put on top of the main stack.
- Method Detail
  - values
```
public static OpCode[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (OpCode c : OpCode.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static OpCode valueOf(java.lang.String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
    
    java.lang.NullPointerException - if the argument is null
  - getValue
```
public byte getValue()
```
  - toHexString
```
public static java.lang.String toHexString(OpCode opCode)
```
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Enum<OpCode>

Enum OpCode

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

PUSH0

PUSHF

PUSHBYTES1

PUSHBYTES33

PUSHBYTES64

PUSHBYTES75

PUSHDATA1

PUSHDATA2

PUSHDATA4

PUSHM1

PUSH1

PUSHT

PUSH2

PUSH3

PUSH4

PUSH5

PUSH6

PUSH7

PUSH8

PUSH9

PUSH10

PUSH11

PUSH12

PUSH13

PUSH14

PUSH15

PUSH16

NOP

JMP

JMPIF

JMPIFNOT

CALL

RET

APPCALL

SYSCALL

TAILCALL

SHA1

SHA256

HASH160

HASH256

CHECKSIG

VERIFY

CHECKMULTISIG

PACK

Method Detail

values

valueOf

getValue

toHexString

toString