ERC20 Token Tutorial | Create Your Own Cryptocurrency

[@BlockExplorerMedia]

A lot of people have been asking how to deploy to mainnet. In retrospect, I should have had that in the video! First add a 'mainnet' configuration in hardhat.config.js, under 'networks'. Then add your mainnet endpoint from Infura to the 'url' field. Finally target that configuration when you issue the deploy command, like this: 'npx hardhat run scripts/deploy.js --network mainnet'. Hope this helps.

[@bethchen87]

@BlockExplorerMedia I was inplementing your code at 1:03:45, but got the error message: TypeError: oceanToken.deployed is not a function at main (C:\Projects\erc-20-tutorial\ocean-token\scripts\deploy.js:8:20) at processTicksAndRejections (node:internal/process/task_queues:95:5) What might be the problem? Can somebody figure it out?

[@jacek0x-b7u]

@47:00 I believe there's no need to duplicate the code in the _mint override of the token. Simply using super should suffice, as it will invoke the capped contract logic, which then triggers the ERC20 logic. This approach should maintain functionality without redundant code.

[@MikeDougherty]

It's been a while, so maybe you realized this already, but at 1:10:00 the explorer shows two transfers. One for the 1,000,000 and another to a different address for 50. I assume that is the blockReward you were trying to find toward the end, no?

[@adityasingh11156]

Thanks😊 for sharing it. Your teaching style is very good. I like how you explain in detail each related concept smoothly rather than rushing through topic fastly.

[@BlockExplorerMedia]

Thanks Aditya - I appreciate the feedback and glad you liked it.

[@SmillaBoyRishRush-lx5nf]

9.45​@@BlockExplorerMedia

[@suryarghyasaha4984]

I'm new to Blockchain Development and your videos helped me so much to grasp all the concepts so fast. You're an amazing teacher and I look forward to learning more and more from you. And since I recently made my own ERC20 token inspired by this tutorial, I sent some of them to the wallet address you mentioned in the descriptions. Thank You So Much man. Please keep up the good work.🙏🤝

[@BlockExplorerMedia]

Thanks so much and congrats on your token. May I know the smart contract address so I can import the token in my wallet? Nice work : )

[@kevinjurden9114]

Could you create a video showing how to create a Token, and instead of minting rewards to 'miners'. Create an Liquidity pool, and mint rewards to those who are staking? Could be implemented into a Defi/Dapp video

[@alexismollet6751]

I loved this video very new to coding and got stuck on some coding errors, but your explaining was very detailed and I watched the whole thing anyway

[@MohamedMokhtar101]

Thank you so much for an amazing explanation! I have a question if you can explain or link to video about the concept of pegging a token to an already established stable coin like USDT C, and what would be the impact in implementing this pegging of a token?

[@Akhbash]

It does display the mining reward in rinkeby etherscan, but it is inside the same transaction. Look at 1:10:00, there are two token transfers ;D

[@BlockExplorerMedia]

Oh good catch! I wonder why the transaction is bundled like that. In the past the reward was always a separate transaction. Thanks for letting me know!

[@abrahamhicksah]

Please can you clarify, why do we need the mining reward? Just a little confused about the need for that part of the code.

[@BlockExplorerMedia]

I want to be clear that the mining reward part is totally optional! It is just an example of one way of generating new token supply into circulation. There are many different options here and you could also not have any supply-generating mechanism and mint all tokens up front. It's really up to the developer. Hope that helps!

[@GauravSinghnikumb]

the soidity version also takes into consideration the openzeppelin pragma solidity version , so keep that in mind

[@andrecastro7817]

hey thanks alot for your video!! can this be deployed on the Binance Smart chian Network ? im trying to make one that taxes and gives reflections on each transactions.

[@TheTravelHubs]

thanks, bro, I created one token and I sent it to your wallet 1m also... thanks again

[@motivationalwebsite7173]

Hello bhai

[@elmergriffen3010]

How do i contact you?

[@tokunbosuleimon4802]

Thanks😊 for sharing it. Your teaching style is very good. I like how you explain in detail each related concept smoothly rather than rushing through topic fastly, and please can you do a front -end

[@tanaytambe396]

Can we use goerli test network ? in my system there is not rinkeby network avaliable. Can you please help me how can i go further?

[@kirazami2282]

Hi did you find a solution ? Thanks

[@tanaytambe396]

@@kirazami2282 not yetbro!

[@albechannel1]

Thanks a lot for this! Just a question: now that Rinkeby has been deprecated, would you suggest (to a newby like me…) how to use another testnet?

[@shjndohjkaru]

you can using sepolia for same

[@advikmarini]

Rinkeby has now been turned into Sepolia by the same company “alchemy” so I just went ahead and used the sepolia test network

[@talhagerginn7672]

Error: cannot estimate gas; transaction may fail or may require manual gas limit Help me

[@TradeMarker-t4f]

same here. are there any solution here?

[@eurekachi863]

Thanks for sharing the knowledge; its massive.

[@adonides]

11:08 Why does the message “infinite gas 733800 gas” appear to me? How can I avoid this? Thanks!

[@nehmetekle7274]

thanks for this amazing video, I have a question can I use your strategy and implement it to my senior project? I am using angular as frontend.

[@elmmacwebmobileapps]

Thanks for teaching master. I appreciate. Question is, how do you give or set a value to the token. say 1000000 tokens, have seen in the tutorial wher it say 1000000 and value $0.00 | so ho do i change or give value to the tokens.??

[@osempo]

Amazing video, the best tutorial on how to create and deploy a token, I hope you keep uploading content more often!

[@AroseLove]

Amazing great stuff a few additional errors here and there (my own doing as only downloaded visual studio code today so was mainly extension errors) Thank you so much for this tutorial, there isn’t another started tutorial I’ve seen as good as this. 🙏🏻

[@nosktech7818]

Can you show or direct me to adding the coding for a “creator reward” for receiving a percentage on every transaction , thank you great walk through 👍

[@sirnawaz]

39:45. `block.coinbase`.. How does this field `coinbase` come from? Is it defined by (or related to) Coinbase Exchange? What is the type of `block`? Is it some `any` kind where arbitrary fields can be added by anyone?

[@Luxorians]

If you want to split the sale, First Pre-sale and after that the main one, how to be organized in the contract?

[@TimKariuki]

Is it possible to add custom metadata to a token?

[@TRVLCreative]

Awesome video. Awesome teacher. Thank you for taking the time to teach the world about web3 effectively :)

[@vaerube6670]

thanks for sharing... hi sir @BlockExplorerMedia i got a question, when I perform the npx hardhat test, it shows "0 passing (1ms) ". I notice your terminal using is "node" instead of "powershell", is that the problems ?& how to solve it? 🙏

[@aayushchopra6080]

Same, unsure what's goin on

[@DEWITTJefferson]

I admire Web3 Infinity's team's transparency. It's an endeavour with moral integrity.

[@bethchen87]

@BlockExplorerMedia I was inplementing your code at 1:03:45, but got the error message: TypeError: oceanToken.deployed is not a function at main (C:\Projects\erc-20-tutorial\ocean-token\scripts\deploy.js:8:20) at processTicksAndRejections (node:internal/process/task_queues:95:5) What might be the problem? Can somebody figure it out?

[@HexElement]

Hey bro I have a quick question. This is my first crypto Im messing around with and am a total noob. When it comes to the Capped supply vs the Max Total Supply, I want to own 80% of the token and have 20% on the market. I put the cap amount at 10 mill and my amount to send the owner 8 mil. Does this mean there is only 8 mil in existence and 2 more mil can be minted.... Or does it mean that 2 mill can be bought and or minted? I need there to be a max supply of 10 mil and 2 mil of that is ready to be traded by the public, but etherscan is only showing 8. I know this is a crazy noob question, but I appreciate your time bro! Awesome tutorial!

[@BlockExplorerMedia]

hey Hex - great question. so for the tokens that you want to make publicly available on the market, those should go to your wallet first (at the time of contract deployment) and then you would transfer those tokens from your wallet into liquidity pools, for example on Uniswap, to be made available for trading. the remaining 20% left unminted could be for miner rewards or any other utility that you can think of. at least that's how I've always done it. some tokens don't have any kind of time-based minting or mining rewards. so at the simplest, you could send yourself 100%, provide 20% of that as liquidity and keep the remaining 80%. hope this helps.

[@HexElement]

@@BlockExplorerMedia You just saved my life! Thats exactly what I was wanting to figure out. Thank you man, you got a subscriber!

[@BlockExplorerMedia]

You bet - thanks!!

[@franklinokafor3229]

​@@HexElementcan you guys teach me i will pay.

[@Globetrottersz1]

@@BlockExplorerMedia a quick one, have compiled as successful unfortunately on. Js test have only managed 3 passing and 4 failing. Where might I be wrong!!?. Thanks in advance

[@АлександрГудов-э5ч]

Hi all! Would you share ,please, how to import assign a picture/avatar for a token?

[@andrew54933]

Hello, very informative video. I'm stuck though, when i try to run "npx hardhat compile" it tells me there is nothing to compile. Am i missing something?

[@officialjobsdekho5426]

bro which code editor should I use to install hardhat? I am not familiar with visual code. If you can make a video about visual code for deploying the contract it would be easy to understand.

[@VVAIBHAVTIWARI]

vs code

[@hberrios23]

do you have any videos on creating a coin on different block chain network or all of the are the same?

[@BlockExplorerMedia]

So far I've only done Ethereum, but the code would be the same for any EVM-compatible chain (such as Polygon). You would just create a network config specific to that chain in the Hardhat config file and then target that for your deploy. For something like Solana it would be totally different code and process though.

[@Pjaming]

So how do you load the coin to main net and on crypto exchanges?

[@alihosseini7708]

Hi, why i dont have any other mainnet than görli and sepolia (59:10)?

[@BlockExplorerMedia]

Other testnets where phased out after the Ethereum 2.0 merge in Sept 2022. The recommendation is to use Goerli going forward.

[@24PetrocoinLLC]

can you include initial token pricing in the contract before deployment?

[@jimgarlie]

Great video, and I see the Rinkeby is now longer available so can you expand on using Sapolia or any others?

[@BillyBishop589]

thanks for this great tutorial.. first tutorial in this blockchain space that worked.. everytime i write code i hit a brick wall with deprecated and outdated info.. thanks much when i go mainnet on polygon ill definitely will be sending a fat stack your way thanks again..

[@coinlisting_net]

how is your token doing mate.

[@shaikhnabeel6443]

Thankyou you really made it look so simple ❤️. Can you tell me if can make NFT on testnet and buy that nft using test ethers? Can i do that?

[@ivanlagade]

Continue making valuable content sir. God bless you more.

[@SultHes]

Many thanks for your time. In blockchain my USDT shows with ERC20 * * * network ( ERC20 with 3 astrikes). what does it mean? I can not find such network. Kindly tell me what to do?

[@AliFarther]

Hello thank you for the video, how can we deploy to main net, can you help with the configuration?

[@BlockExplorerMedia]

I pinned a comment to the top of this video explaining how. Let me know if you have any other questions.

[@telego1151]

Hey, thank you for the video, super thorough and helpful! One quick question though, is the coding the same for minting and BlockRewards now that Ethereum has moved to Proof of Stake or should we do anything different?

[@paranormalgamesstudios]

Any MEV Blocker protection included in this?

[@Bobbybaitz]

Hi, I'm running into this error: npm : The term 'npm' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. At line:1 char:1 + npm init + ~~~ + CategoryInfo : ObjectNotFound: (npm:String) [], CommandNotFoundException + FullyQualifiedErrorId : CommandNotFoundE xception Any help?

[@sayantanmitra4851]

hey have you installed npm

[@sayantanmitra4851]

node package manager

[@AashishK1993]

@@sayantanmitra4851 I just did but it's still saying the same thing? Any idea why?

[@williamwallace5707]

Very in-depth, great tutorial. I was wondering what type of environment you are coding in. Are you using Docker, a VM, cloud or your PC? I am new to coding, very basic understanding and am concerned about installing and experimenting with various scripts/software and blockchain based things.

[@mobiactive]

Good morning, to create a BSC network, do I need to change the router or do I have to change something else in the code?

[@digitalthoughts334]

Thanks for uploading this tutorial. Amazing work. I am facing issues at 36:56 and getting this error: TypeError: Derived contract must override function "_mint". Two or more base classes define function with same name and parameter types. Could you please suggest what could be causing these issues? I don't see you have any issues.

[@drawcontent3664]

This error occurs when a contract is derived from two or more base contracts that have a function with the same name and input parameter types. In your case, it seems that you have defined the _mint function in your derived contract and also inherited it from one or more base contracts. To resolve this error, you need to override the _mint function in your derived contract to ensure that it has the same function signature as the base contract(s). This means that the function name, input parameter types, and return type must be exactly the same. Here's an example of how you can override the _mint function in your derived contract: javascript Copy code function _mint(address account, uint256 amount) public onlyOwner { require(account != address(0), "ERC20: mint to the zero address"); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); } This adds the onlyOwner modifier to restrict minting to the contract owner, but you can modify it as per your requirements. Just make sure that the function signature is the same as the base contract(s) to avoid the error.

[@kirazami2282]

Hi did you find solution ? thanks

[@shachar991]

​ It happens because of multiple references to the ERC20 contract (ERC20Capped & ERC20Burnable). If are talking about the _mint function (defined in both ERC20 and ERC20Capped contracts), you should override the function in your Token contract (add override(ERC20, ERC20Capped) to the _mint() signature - the order doesn't matter) and call super._mint(). The code will use the ERC20Capped function since we are using super and it's "closer" in the inheritance chain (you can also just use ERC20Capped._mint() explicitly). Hope it helped.

[@Dekon7]

What is presale, private presale l, fairlaunch, stealth launch etc. Plz make a video on that sir! On all the launch types

[@jhhnadkins5669]

Hello, thanks very much for video. Process is same for bep20 token too? Can I find out? And can we add halving?

[@thelegendjustice]

it says "infinite gas" for me on creating the constructor, what did i do wrong ? thanks

[@jcw1197]

Your block reward was showing in the tx hash! Just FYI, 🙂

[@VioletClaw816]

Derived contract must override function "_mint". Two or more base classes define function with same name and parameter types when I inherited those two contracts.

[@dadsquad_8914]

im assuming to figured this problem out by now?

[@VioletClaw816]

@@dadsquad_8914 ha. I think so. I finished that project but I forgot what I did.

[@DrRAZI99]

brother anything Rinkeby related just doesn't work anymore , what should i change it to ?

[@PulokPandit]

what will be the procedure to deploy it to main net and does it gonna cost me something ??

[@xTazzyD]

In the beggining of the program VS its says: 'npm : The term 'npm' is not recognized as the name of a cmdlet, function, script file, or operabl e program. Check the spelling of the name, or if a path was included, verify that the path is cor rect and try again. At line:1 char:1 + npm init + ~~~ + CategoryInfo : ObjectNotFound: (npm:String) [], CommandNotFoundException + FullyQualifiedErrorId : CommandNotFoundException' can you tell me what to do ?

[@ardianzzz1]

i got an error : TypeError: Cannot read properties of undefined (reading 'formatEther') How can you successfully compiled it without importing ether.js?

[@myhapylife]

I got the same, you managed to solve this?

[@ObscureOdysseys]

Alright so after a lot of debugging I actually got it to work on sepolia, what a great feeling! But, you never went back and taught us how to deploy on mainnet. Is it simply changing the infura endpoint link to mainnet link?

[@BlockExplorerMedia]

Yes, exactly. I pinned a comment to the top explaining. A lot of people have been asking this. Thanks!

[@jaspaw.5473]

Am getting an "import error" on my code which I don't know how to solve. I downloaded your source code and it is giving me the same error.... I have a feeling that something with my visual code IDE is not right. ,Could someone please help me with this, it's been stressing me out for hours now. Thanks in advance.

[@okarakas4086]

Hi. I created token but I can't verfiy. tried many ways, including flattened contract file, but this did not resolve the issue. Could you tell how to solve problem and verify contract please? The contract created by Remix for BSC, ERC20. And contract deployed. Also all toknes transferred to Metamask. But can not verify!

[@superfunsurf]

cool. and how do you setup an image url?

[@armanqlf2220]

And do you know it now?

[@superfunsurf]

@@armanqlf2220 with etherscan

[@galeraonthebeat]

Why do we need ERC20Capped if we created the same function (_mint) inside our token contract? We do not have a function that overrides cap value so we could just use our cap value that we could declare in constructor.

[@ng8530]

Please, a tutorial to launch an ICO 🙏🙏🙏

[@TreelandPlantation-oy5lc]

when im in visual studio and type npm init it gives an error and says npm term is not recognized as the name cmdlet and check the name and etc

[@jeffman97]

m.kzbin.info/www/bejne/m5LYg3ifZduqeJI&pp=ygUNbm9kZWpzIHZzY29kZQ%3D%3D

[@BlockExplorerMedia]

Check to make sure you have NodeJS installed on your machine first - that's what will give you npm. nodejs.org/en/download

[@hybrid_animals68]

i have error please help me : Should set the max capped supply to the argument provided during deployment: TypeError: Cannot read properties of undefined (reading 'formatEther')

[@REZAZIMohamedabdessamed]

Thanks for the quality explanation. I've a question, on the Transfer method I checked the original ERC20 implementation and they didn't multiply the amount input with the decimals... however it is still working (the balance got updated correctly).. how is that

[@astrofoundation]

Can you make a video where we create an ICO - full dApp ?

[@BlockExplorerMedia]

Yeah I've been thinking about something like that to follow this one up with - thanks for the suggestion.

[@rosariosway]

Thank you for this video! I have learned a lot of stuff through it, you did an excellent job! 👏

[@EclipseEgg]

will you get in trouble if you don't include MIT license statement?

[@opionetics]

whats the block reward for?

[@advikmarini]

I am getting another error when I try to run "npx hardhat run --network rinkeby scripts/deploy.js" This is the error that I am getting: TypeError: no matching function (argument="key", value="deployed", code=INVALID_ARGUMENT, version=6.6.4) I understand that it has something to do with the ethers version that I am using, but I'm not quite sure what the substitute would be for "deployed" in the current version that I am using for ethers, and I haven't been able to find a substitute on the internet for this function. Thanks!

[@syamimirfan4303]

I'm using GoerliETH for my project. How many GoerliETH do I need to fix Error: insufficient funds for intrinsic transaction cost this error?

[@kirazami2282]

Did it work for you on goerli ?

[@syamimirfan4303]

@@kirazami2282 nope it didn't. But I change to sepoliaETH instead of GoerliETH.

[@richiebrown6065]

which state are you in?

[@MichaelWongManTak]

Sir, thanks for your video. Is it possible to get support in real time guidance in setting up our token. ??

[@mrcrazy3960]

Please I’m getting this error any help “Before each” hook for “should set the right owner”: HardhatError; HH700: Artifact for contract “sunToken” not Found

[@xVngi]

is Rinkeby still viable, even though the website you displayed in here, no longer works & is no longer a metamask test network, is there another alternative, you'd recommend?

[@BlockExplorerMedia]

Rinkeby and others were deprecated after the Ethereum 2.0 merge. Recommendation is to use Goerli now.

[@xVngi]

@@BlockExplorerMedia Thanks for the response, I actually attempted this too although once I attempt to deploy i see: Error HH100: Network goerli doesn't exist

[@xVngi]

I actually resolved this, I made a slight typo, oops although now I see this: reason: 'insufficient funds for intrinsic transaction cost', code: 'INSUFFICIENT_FUNDS'

[@kanjinft]

@@xVngi How did you solved it?

[@kanjinft]

@@xVngi Did you used Goerli Faucet?

[@ediilie664]

whitch is the difference to deploy on maynnet ?

[@brenobertulucci134]

on minute 53 i received this error on 3 last test function: TypeError: Cannot read properties of undefined (reading 'address')

[@UsmanKhan-nc2md]

honestelly sir this is one of the best vidio

[@mikelac2]

Will this work with prc-20?

[@samrahul1993]

when ever im tring to do npm init.. its giving me an error npm : The term 'npm' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. At line:1 char:1 + npm init + ~~~

[@UsmanKhan-nc2md]

Thank You So much Sir I learned Alot

[@indiuma]

still get solidity version error tho it matches to hardhat file doesnt compile

[@donaldschell1696]

npm init gives me an error... npm ; the term 'npm' is not recognized as the cmdlet, function, script file, or operable program....

[@realfightnation]

how did you fix this?

[@bearsbestanimals]

Hello, how do I add a picture to the token?

[@SoftWorkDotNg]

The correct link contains a subdirectory "blob", that was what you missed.

[@MarketMasteryMedia]

How can I set Buy and Sell Tax 5% on my token? Could you help me?

[@kruzoty929]

hello, how i can add a web site and a twitter account to my contract erc20 ? a specifical code lign ?

[@noahcurry4510]

Around 15 minutes, we’re trying to deploy and run transactions but I keep getting a “false transaction mined but execution failed” it looks like it’s giving me an error pertaining to gas fees. Anybody know a fix?

[@jiaxunhoa4274]

why you switch from remix to VS code IDE?

[@BlockExplorerMedia]

I use VS code IDE to develop and Remix for testing due to the convenient contract UI interface.

[@SuryaVino]

at 44.35 you dont have artifacts folder and then 44.41 artifacts is shown here how

[@HarbingerOfDank]

Imagine the post office uses tokens/nfts to ship letters and such. It would include a built in tracking system. The nft could represent the Stamp and include to:/from: information. Or nfts that represent land in real world. Owners of the nft land could be incentivized by rental income, land development, etc. Or small business nft that would be backed by material or products. In lieu of rasing capital and giving away % in your company. Take a nft loan by backing your purchase orders with nfts designed to return a certain %.

[@williamchen8368]

I am trying all on your steps, but i am stuck at the contract RTXToken is ERC20 {....sadly i cant compile with success.

[@stevelawless1]

Hey I loved your video, I have a dating app just about to launch which I am looking at creating a token for a variety of reward reasons for my users, I develop in javascript and php and wondered if you had a video which would build on this video, and tie in how to programmatically send tokens to users who meet certain goals, any help would be great thanks.

[@pantherverse]

Hey man, am getting this error 'aquaToken contract "before each" hook for "Should set the right owner": HardhatError: HH700: Artifact for contract "AquaToken" not found.' What might be the problem?

[@apricotcomputers3943]

Is erc20 the same as brp20

[@kirazami2282]

Hi Rinkeby test network has been deprecated, any solutions ? Thanks

[@ericcribbs4715]

The npm init command is not taking in my vs code terminal im at a loss how this is working for yall

[@illuminaughty666]

You must have nodeJS installed in your pc