NEO blockchain, programming tutorials, Javascript — 4

NEP5 Token Transfer

neon-js

This is a series of how you can start to build a decentralized app on the top of NEO. Before moving forward, I will guide you the fundamental aspect before we get started.

I am a full-stack javascript developer and one of the contributors for NEO blockchain project.

How To Get Started

NEO blockchain, programming tutorials, Javascript — 1

Transfer NEP5 Token

Goal: Transfer 22.22 ONT

const NEON = require('@cityofzion/neon-js')
const { api, wallet, u } = NEON
const account = new wallet.Account(**privateKey**)
const toAddress = 'AWXWmwm3UCXeDcLM8RpF7QLdsMrnrbHNxj'
const ontTokenScriptHash = 'ceab719b8baa2310f232ee0d277c061704541cfb'
const ontTransferAmount = 100.001
Neon.api.doInvoke({
  net: 'MainNet',
  account: account,
  intents: api.makeIntent({ GAS: 0.00000001 }, account.address),
  script: {
    scriptHash: ontTokenScriptHash,
    operation: 'transfer',
    args: [
      u.reverseHex(wallet.getScriptHashFromAddress(account.address)),
      u.reverseHex(wallet.getScriptHashFromAddress(toAddress)),
      new u.Fixed8(ontTransferAmount).toReverseHex(),
    ],
  },
})
.then(response => {
  ...update ui accordingly
})

Tip of the day

doInvoke under the hood is actually doing lots of things for you in order to communicate with rpc .

• Step 1
  fillUrl — With provided net , it would help you to decide the best rpc among all the available rpcs
• Step 2
  fillKeys — With provided account , it would help you out to fill out keys of address, privateKey and publicKey
• Step 3
  fillBalance — With provided account , it has the ability the abstract address from it. Then it would use API call to get your balance.
• Step 4
  createTx — Create a transaction invocation, and check all the necessary fields are provided before using your privateKey to sign it
• Step 5
  signTx — Sign the invocation that was created with your privateKey

I have intentionally leak out some information that I think it not necessary for transfer nep5 token. Feel free to check out their source code for more information.

Stay Tune

For coming Monday topic, I will look at the response message and see which one that might fit for the coming topic. Feel free to drop message to me if you want to suggest a topic for me.

I make one post on every Monday UTC+0 time zone, but if I have more than 500 claps, I make another post immediately.

Useful Link

「Blockchain Programing」
1.「NEO blockchain, programming tutorials, Javascript — 1」
2.「NEO blockchain, programming tutorials, Javascript — 2」
3.「NEO blockchain, programming tutorials, Javascript — 3」
4.「NEO blockchain, programming tutorials, Javascript — 4」
5.「NEO blockchain, programming tutorials, Javascript — 5」

NEP5 Token ScriptHash List
NEP5 token scriptHash

What Is Ontology?
What is Ontology? (Programmer Explain) / 什麼是 Ontology? 聽聽工程師怎麼說

Github
My Github

Neon-JS
NEON-JS-SDK

Blockchain Link List
Blockchain Posts List

About me
I am a full-stack javascript developer and one of the contributors for NEO blockchain project.

Build Decentralized Application with Javascript on the top of NEO?
NEO blockchain, programming tutorials, Javascript

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