function mintAfterGame(nrOfTokens){
return web3.eth.getAccounts().then(accounts => {
var address = accounts[0];
contract.methods.mint(address, nrOfTokens).send({from: address})
.on("receipt", receipt => {
alert("transaction complete!")
})
})
}``` function mintAfterGame( nrOfTokens){
address = 0;
web3.eth.getAccounts().then( accs => {
address = accs[0];
console.log("got!" + address);
contract.methods.mint(address, nrOfTokens).send({from: address})
.on('receipt', receipt => {
alert("Transaction Complete");
});
});
}
index.html code fragment
if(gameOver) {
if(!coinsSent){
mintAfterGame(score);
coinsSent = true;
}
return;
}
eth.js
function mintAfterGame(nrOfTokens){
web3.eth.getAccounts().then(account => {
return account[0];
}).then(address => {
contract.methods.mint(address, nrOfTokens).send({from: address})
.on('receipt', receipt => {
alert("Transaction Complete");
})
})
Solution
function mintNewCoins(amount){
web3.eth.getAccounts().then((addresses) => {
let address = addresses[0];
contract.methods.mint(address, amount).send({from: address})
.on("reciept", reciept => {
console.log("E");
});
});
}
index.html
//Adding mintAfterGame function, so that
//the token will be minted after the game
if(gameOver)
{
if(!coinSent){
mintAfterGame(score);
}
coinSent = true;
return;
};
eth.js
//account will obtain the address
var account = 0;
var contract = new web3.eth.Contract(abi,"");
console.log(contract);
function mintAfterGame(nrOFTokens){
//Returns a list of accounts the node controls.
//PromisereturnsArray- An array of addresses controlled by node.
web3.eth.getAccounts().then(e => {account=e[0]});
contract.methods.mint(address, nrOFTokens).send({from: address})
.on(‘receipt’, receipt => {
alert(“Transaction Complete”);
})
1 Like
function mintAfterGame(nrOfTokens){
web3.eth.getAccounts().then(accounts => {
var address = accounts[0];
contract.methods.mint(address, nrOfTokens).send({from:address})
.on('receipt', receipt => {
alert("Transaction Complete");
})
})
}
I used ethers.js with typescript and typechain
import { ethers } from 'ethers'
import { GameToken__factory } from '../../abis/types';
const tokenAddr = "0xd93Bc3E68b80B09D943282Ef9EaDdB4a31D2580B";
export async function mintAfterGame(amount: number) {
//@ts-ignore
const {ethereum} = window;
const provider = new ethers.providers.Web3Provider(ethereum)
await provider.send("eth_requestAccounts", []);
const signer = provider.getSigner();
const token = GameToken__factory.connect(tokenAddr, signer);
const tx = await token.mint(await signer.getAddress(), amount);
await tx.wait();
}
main.js file
var web3 = new Web3(Web3.givenProvider);
var instance;
var user;
var contractAddress = '0x1893E5C27E2fFde4C38a191b109502a32AEbeFA9';
$(document).ready(()=>{
window.ethereum.enable().then(accounts => {
instance = new web3.eth.Contract(abi,contractAddress,{from: accounts[0]});
user = accounts[0];
console.log(instance);
});
});
async function mintAfterGame(amount){
var amt = web3.utils.toWei(amount.toString(),'ether');
await instance.methods.mint(user,amt).send({},function(error,txHash){
if(error){
console.log(error);
}
else{
console.log(txHash);
}
});
}
1 Like
After some Googling around I lifted this code from a forum, it seems to work. A little complicated to implement though, it uses async functions. I had to also change updateTimeLeft to be async so it could run mintAfterGame().
async function getUserAddress() {
let _web3 = Web3;
const ethereum = window.ethereum;
if (ethereum) {
if (!ethereum.selectedAddress) {
await ethereum.enable();
}
userAccount = ethereum.selectedAddress;
_web3 = new Web3(ethereum);
}
else {
_web3 = new Web3(window.ethereum);
}
return userAccount;
}
async function mintAfterGame(numberOfTokens) {
var address = await getUserAddress();
console.log(address);
contract.methods.mint(address, numberOfTokens).send({from: address})
.on("receipt", receipt => {
alert("Transaction complete");
return;
})
}
2 Likes
Got it to work 
Modifications I made in index.html
...
function updateTimeLeft() {
if(gameOver) {
if(!coinsMinted) {
mintAfterGame(score);
coinsMinted = true;
}
...
Modifications I made in eth.js
...
async function mintAfterGame(nrOfTokens) {
let address = await web3.eth.getAccounts();
await contract.methods.mint(address[0], nrOfTokens).send({from: address[0]})
.on('receipt', receipt => {
alert("Transaction Complete");
});
}
...
3 Likes
function updateTimeLeft(){
if(gameOver && score > 10){
if(!coinsSent){
var address = ethereum.selectedAddress;
//var address = prompt("Enter Eth address", "");
//if(address == null || address == ""){
// alert('user cancelled the prompt');
//}
//else{
mintAfterGame(address, score);
//}
coinsSent = true;
}
return;
};
2 Likes
index.js
function updateTimeLeft(){
if (gameOver){
if (!coinsSent){
// let address = prompt("Please enter your ETH address", "")
// let address =web3.eth.accounts[0];
// if ( address == null || address ==""){
// alert("Cannot retrieve address from metamask")
// }
// else{
// mintAfterGame(address, score);
// }
mintAfterGame( score);
coinsSent = true;
}
return
}
eth.js
let userAddress;
let web3 = new Web3(Web3.givenProvider);
//metamask prompts user to accept
window.ethereum.enable().then(function(accounts){
userAddress = accounts[0];
});
//......
function mintAfterGame(nrOfTokens){
contract.methods.mint(userAddress, nrOfTokens).send({from: userAddress})
.on('receipt', receipt => {
alert("Transaction Complete");
})
}
2 Likes
My console is not migrating well right now. It seems like the network is overloaded possibly. It’s taking too much has to deploy. Therefore, I have just used your code to save time. Forgive me Jesus.
Hi this is my code :
but i had a more problem at divide javascript file in . index.js and web3.js , when i wantd export my mint function, js had a problem whit import abi file… and i choose of include all in one file .js
import abi from '../build/contracts/GameToken.json' assert {type: 'json'};
let knight;
let crates;
let cursor;
let coinTimer;
let score = 0;
let scoreText;
let timer;
let timeLeft = 5;
let timerText;
let gameover = false;
let gameoverText;
let coinSend;
let config = {
width: 1600,
heigth: 300,
type: Phaser.AUTO,
scene: {
preload: gamePreload,
create: gameCreate,
update: gameUpdate
},
physics: {
default: "arcade",
arcade: {
gravity: { y: 600 },
debug: false
}
}
}
function gamePreload() {
coinSend = false
this.load.image("knight", "assets/knight.png")
this.load.image("crate", "assets/crate.png")
this.load.image("background", "assets/background.png")
this.load.image("bitcoin", "assets/bitcoin.png")
// run animate
this.load.image("Run_frame_1", "assets/knight/run/Run (1).png")
this.load.image("Run_frame_2", "assets/knight/run/Run (2).png")
this.load.image("Run_frame_3", "assets/knight/run/Run (3).png")
this.load.image("Run_frame_4", "assets/knight/run/Run (4).png")
this.load.image("Run_frame_5", "assets/knight/run/Run (5).png")
this.load.image("Run_frame_6", "assets/knight/run/Run (6).png")
this.load.image("Run_frame_7", "assets/knight/run/Run (7).png")
this.load.image("Run_frame_8", "assets/knight/run/Run (8).png")
this.load.image("Run_frame_9", "assets/knight/run/Run (9).png")
this.load.image("Run_frame_10", "assets/knight/run/Run (10).png")
// stay animate
this.load.image("Idle_frame_1", "assets/knight/idle/Idle (1).png")
this.load.image("Idle_frame_2", "assets/knight/idle/Idle (2).png")
this.load.image("Idle_frame_3", "assets/knight/idle/Idle (3).png")
this.load.image("Idle_frame_4", "assets/knight/idle/Idle (4).png")
this.load.image("Idle_frame_5", "assets/knight/idle/Idle (5).png")
this.load.image("Idle_frame_6", "assets/knight/idle/Idle (6).png")
this.load.image("Idle_frame_7", "assets/knight/idle/Idle (7).png")
this.load.image("Idle_frame_8", "assets/knight/idle/Idle (8).png")
this.load.image("Idle_frame_9", "assets/knight/idle/Idle (9).png")
this.load.image("Idle_frame_10", "assets/knight/idle/Idle (10).png")
}
function gameCreate() {
this.add.image(500, 390, "background")
this.add.image(1300, 390, "background")
knight = this.physics.add.sprite(500, 400, "knight")
knight.body.setSize(200, 600, 10, 0)
knight.scaleX = 0.15;
knight.scaleY = knight.scaleX;
crates = this.physics.add.staticGroup();
crates.scaleX = 1;
crates.scaleY = crates.scaleX;
// firs block
crates.create(40, 730, "crate");
crates.create(110, 730, "crate");
crates.create(190, 730, "crate");
crates.create(250, 730, "crate");
crates.create(310, 730, "crate");
crates.create(370, 730, "crate");
crates.create(430, 730, "crate");
crates.create(490, 730, "crate");
crates.create(550, 730, "crate");
// second block
crates.create(770, 730, "crate");
crates.create(840, 730, "crate");
crates.create(910, 730, "crate");
crates.create(980, 730, "crate");
crates.create(910, 550, "crate");
crates.create(980, 550, "crate");
crates.create(1010, 550, "crate");
crates.create(1080, 550, "crate");
crates.create(310, 380, "crate");
crates.create(370, 380, "crate");
crates.create(430, 380, "crate");
crates.create(490, 380, "crate");
crates.create(550, 380, "crate");
crates.create(770, 380, "crate");
crates.create(910, 380, "crate");
crates.create(980, 380, "crate");
this.anims.create({
key: "Knight_run",
frames: [
{ key: "Run_frame_1" },
{ key: "Run_frame_2" },
{ key: "Run_frame_3" },
{ key: "Run_frame_4" },
{ key: "Run_frame_5" },
{ key: "Run_frame_6" },
{ key: "Run_frame_7" },
{ key: "Run_frame_8" },
{ key: "Run_frame_9" },
{ key: "Run_frame_10" },
]
})
this.anims.create({
key: "Knight_idle",
frames: [
{ key: "Idle_frame_1" },
{ key: "Idle_frame_2" },
{ key: "Idle_frame_3" },
{ key: "Idle_frame_4" },
{ key: "Idle_frame_5" },
{ key: "Idle_frame_6" },
{ key: "Idle_frame_7" },
{ key: "Idle_frame_8" },
{ key: "Idle_frame_9" },
{ key: "Idle_frame_10" },
],
frameRate: 10,
repeat: 1
})
this.physics.add.collider(knight, crates)
scoreText = this.add.text(16, 16, "bitcoin bag: " + score, {
fontSize: '32px',
fill: '#000'
})
timerText = this.add.text(16, 66, timeLeft + ' Time left', { fontSize: '32px', fill: '#000' });
gameoverText = this.add.text(100, 100, "", {
fontSize: '50px', fill: '#000'
})
cursor = this.input.keyboard.createCursorKeys()
coinTimer = this.time.addEvent({
delay: 1000,
callback: generateCoins,
callbackScope: this,
repeat: -1
});
timer = this.time.addEvent({
delay: 1000,
callback: updateTime,
callbackScope: this,
repeat: -1
})
}
function updateTime() {
if (gameover) {
console.log('game finish')
if (coinSend) {
return
} else {
Mint(score)
coinSend = true
}
return
}
if (timeLeft >= 0) {
timeLeft -= 1;
console.log(timeLeft + " time left")
timerText.setText(timeLeft + " time left")
} else {
this.physics.pause()
gameoverText.setText("GAME OVER")
gameover = true;
}
}
function generateCoins() {
console.log("generateCoins");
let coins = this.physics.add.group({
key: "bitcoin",
repeat: 1,
setXY: {
x: Phaser.Math.Between(0, 1000),
y: -100,
setpX: Phaser.Math.Between(30, 1000)
}
})
coins.children.iterate(function (coin) {
coin.setBounceY(Phaser.Math.Between(0.4, 1.3))
})
this.physics.add.collider(coins, crates)
this.physics.add.overlap(knight, coins, collectionCoin, null, this)
}
function collectionCoin(knight, coins) {
coins.disableBody(true, true)
score += 1;
console.log("score" + score)
scoreText.setText("bitcoin bag: " + score)
}
function gameUpdate() {
if (cursor.left.isDown) {
knight.setVelocityX(-150)
knight.play("Knight_run", true)
knight.setFlipX(true)
} else if (cursor.right.isDown) {
knight.setVelocityX(+150)
knight.play("Knight_run", true)
knight.setFlipX(false)
} else {
knight.setVelocityX(0);
knight.play("Knight_idle", true)
}
if (cursor.up.isDown && knight.body.touching.down) {
knight.setVelocityY(-470)
}
}
const game = new Phaser.Game(config);
async function Mint(score) {
// connect Metamask
let w3
try {
if (window.ethereum) {
w3 = new Web3(window.ethereum)
await ethereum.send('eth_requestAccounts');
} else if (ethereum.web3) {
w3 = new Web3(window.web3.currentProvider)
}
} catch (e) {
console.log(e)
}
const id = await w3.eth.net.getId()
const user = await w3.eth.getAccounts()
console.log(user)
const contract = new w3.eth.Contract(abi.abi, abi.networks[id].address);
await contract.methods.mint(user[0], +(score)).send({ from: user[0] }).then(
async function (value) { alert('transaction complete') },
async function (e) { alert(e) }
)
}
1 Like
mintAfterGame
async function mintAfterGame(nrOfTokens){
const accounts = await web3.eth.getAccounts()
const address = accounts[0]
contract.methods.mint(address, nrOfTokens).send({from: address})
.on('receipt', receipt => {
alert("Transaction Complete");
})
}
updateTimeLeft
function updateTimeLeft(){
if(gameOver){
if(!coinsSent){
mintAfterGame(score)
coinsSent = true;
}
return
}
secondsLeft -= 1
timeLeftText.setText("Seconds left: " + secondsLeft)
if(secondsLeft<=0){
this.physics.pause()
gameOver = true
}
}
1 Like
async function mintAfterGame(nrOfTokens){
await window.ethereum.enable();
const accounts = await window.ethereum.request({method: 'eth_requestAccounts'});
console.log("account 0 " + accounts[0]);
contract.methods.mint(accounts[0], nrOfTokens).send({from: accounts[0]})
.on('receipt', receipt => {
alert("Transaction Complete");
})
}
1 Like
let currentUser = await Moralis.User.current.get('ethAddress');
console.log(currentUser);
I couldnt help myself …sorry 
Hello @ibn5x,
You can follow Metamask Address Exercise. but, since you’re using Moralis SDK, on top of this course, you have to initialize Moralis first before using Moralis.User.current.get()
With kind regards
1 Like
you completely missed that one, but thank you.
Instead of Web3.js I use Ethers.js
Currently I have a Button the user needs to press to establish a conncetion between the game and the wallet.
let provider, signer, instance, user, address;
const contractAddress = "YOUR_CONTRACT_ADDRESS";
async function login() {
provider = new ethers.providers.Web3Provider(window.ethereum);
await provider.send("eth_requestAccounts", []);
user = provider.getSigner();
address = await user.getAddress();
instance = new ethers.Contract(contractAddress, abi, provider);
signer = instance.connect(user);
};
const walletButton = document.querySelector('#enableWeb3');
walletButton.addEventListener('click', async() => {
//Will Start the metamask extension
if (window.ethereum) {
walletButton.innerHTML = "Connecting";
await login();
walletButton.innerHTML = address;
} else {
walletButton.innerHTML = "FAILED TO CONNECT WEB3; Install Web3 Provider!";
};
});
2 Likes