runtime

package
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Published: Jul 19, 2020 License: MIT Imports: 0 Imported by: 53

Documentation

Overview

Package runtime provides various service functions related to execution environment. It has similar function to Runtime class in .net framwork for Neo.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Application

func Application() byte

Application returns the Application trigger type value to compare with GetTrigger return value.

func CheckWitness

func CheckWitness(hashOrKey []byte) bool

CheckWitness verifies if the given script hash (160-bit BE value in a 20 byte slice) or key (compressed serialized 33-byte form) is one of the signers of this invocation. It uses `Neo.Runtime.CheckWitness` syscall.

func Deserialize

func Deserialize(b []byte) interface{}

Deserialize unpacks previously serialized value from a byte slice, it's the opposite of Serialize. It uses `Neo.Runtime.Deserialize` syscall.

func GetTime

func GetTime() int

GetTime returns the timestamp of the most recent block. Note that when running script in test mode this would be the last accepted (persisted) block in the chain, but when running as a part of the new block the time returned is the time of this (currently being processed) block. This function uses `Neo.Runtime.GetTime` syscall.

func GetTrigger

func GetTrigger() byte

GetTrigger returns the smart contract invocation trigger which can be either verification or application. It can be used to differentiate running contract as a part of verification process from running it as a regular application. Some interop functions (especially ones that change the state in any way) are not available when running with verification trigger. This function uses `Neo.Runtime.GetTrigger` syscall.

func Log

func Log(message string)

Log instructs VM to log the given message. It's mostly used for debugging purposes as these messages are not saved anywhere normally and usually are only visible in the VM logs. This function uses `Neo.Runtime.Log` syscall.

func Notify

func Notify(arg ...interface{})

Notify sends a notification (collecting all arguments in an array) to the executing environment. Unlike Log it can accept any data and resulting notification is saved in application log. It's intended to be used as a part of contract's API to external systems, these events can be monitored from outside and act upon accordingly. This function uses `Neo.Runtime.Notify` syscall.

func Serialize

func Serialize(item interface{}) []byte

Serialize serializes any given item into a byte slice. It works for all regular VM types (not ones from interop package) and allows to save them in storage or pass into Notify and then Deserialize them on the next run or in the external event receiver. It uses `Neo.Runtime.Serialize` syscall.

func Verification

func Verification() byte

Verification returns the Verification trigger type value to compare with GetTrigger return value.

Types

This section is empty.

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