Writing a dApp using Solidity, Truffle, Ganache, MetaMask | Part 1

[@craigkanyemba]

This is good, you just helped me on the bootstrap to vanilla js. Keep it up: )

[@blackninja2.027]

Thanks and waiting for part 2❤

[@WebDevCody]

It’s already published

[@akmalll_-1286]

any solution, when i deploy, gas not be used in ganache and no transactions

[@salvigi1676]

Very good tutorial.

[@AlexZaharia24]

does the test create a new instance of the 'Tickets' contract each time? If yes, then why isn't it saved in ganache? The funds are withdrawn to the accounts and transfered to the new contract instances, but the contract instances are not persisted.

[@silihuang1731]

thanks for your tutorial !

[@yongchanghe5576]

Great Cody! Thank you for your detailed tutorial! I have learned a lot from these tutorial resources. And by the way, would you please share another tutorial using react as the front end to set up the UI and interact with the solidity smart contract deployed by truffle and ganache? Thank you in advance! I have worked with drizzle (using react as a front-end tool) but because I am lacking the knowledge of React, I cannot go any further. Cheers bro!😜

[@SeibertSwirl]

Good job babe!

[@thayaganthusiyanthan9708]

Nice this is good!

[@crypto_peng]

would you use Hardhat or Foundry?

[@HassanHatem-e8f]

Can I Withdraw This (ETH) Or This Watch Only?

[@jianmao4560]

Thanks, that's great! But in the last step after I run truffle test, there is an error: Returned error: VM Exception while processing transaction: revert. What does this mean?

[@blackninja2.027]

After running the truffle test um getting this error. > Everything is up to date, there is nothing to compile. Contract: Tickets 1) should allower a user to buy a ticket > No events were emitted 0 passing (173ms) 1 failing 1) Contract: Tickets should allower a user to buy a ticket: TypeError: instance.buyTickets is not a function at Context. (test/Tickets.js:13:24) at processTicksAndRejections (internal/process/task_queues.js:97:5) Could you help me to fix this?

[@AlexZaharia24]

it should be instance.buyTicket() (drop the 's')

[@emphaticstew5807]

This is is something that confuses me, what if my contract is already deployed? Do I still need to deploy or just compile the contracts? Thanks awesome videos!

[@WebDevCody]

You’d need to redeploy a brand new contract from what I understand

[@sugamkuber9057]

Thanks a lot, It really helped a lot, hope u keep doing great content like this..hehe :)

[@WebDevCody]

Haha idk, at this point I’m not a strong believer in web3. I may go back to my normal react tutorials

[@harshnambiar]

Hey! Nice tutorial. Could you cover the deployment to a couple of other EVM chains like Tron and FTM as well? Everything else would be same as ETH expect the deployment. There aren't many tutorials on these so this might be pretty cool.

[@marcosemenzato9277]

Hi, this is a very cool tutorial thankyou. But for some reason I can't get it working. I mean, I can create the 10 items over the blockchain and with Ganache I can see them. The problem is that seems that the constructor is never called. The price is fixed to 0, and also the owner (I changed it to 1 for a test). What could be the problem?

[@marcosemenzato9277]

I found out that I had already deployed the contract and so the constructor never got called. To solve the problem I just created a new project. Now, is there a way to force the deployment procedure from the beginning?

[@chiranjithraghava8322]

Hey . How do deploy tickets again

[@fatimahnaqvi9086]

Hey, I am kinda new to solidity and really need to write the test code for my contract Can you please help me write test code for my contract if I send you my smart contract code? Need it urgently!

[@kenansari]

great tuto thank you Cody! A Question: How did you learn to code with Solidity? What was your source? the documentation? Thank you

[@WebDevCody]

I just used copilot to help me generate code and then I’d google the keywords if I didn’t understand them.

[@kenansari]

@@WebDevCody thanks

[@nikitakehlerr311]

@@WebDevCody genius

[@marsalan8720]

truffle migration giving an error. anybody can solve this kindly.

[@francescosalzano5848]

I receive: "Tickets" hit an invalid opcode while deploying. Try: * Verifying that your constructor params satisfy all assert conditions. * Verifying your constructor code doesn't access an array out of bounds. * Adding reason strings to your assert statements.

[@francescosalzano5848]

resolved, I changed the solidity version using the docker: true properties in the config

[@LoremIpsum85]

yep, I changed solidity version to ^0.8.19 and kept //docker: true commented out

[@SniperAlys]

I have problem in 17:52 when do the truffle migration, i get this error Error: Error: CompileError: ParsedContract.sol:5:1: ParserError: Expected pragma, import directive or contract/interface/library definition. public uint256 constant TOTAL_TICKETS = 10; ^----^ ------> i have the same exactly code as you !!!! :(

[@SniperAlys]

and if I move constant declaration inside the contract, also i have another error about: SyntaxError: No visibility specified. Did you intend to add "public"? constructor() { ^ (Relevant source part starts here and spans across multiple lines). Any ideas? Sorry im new on Solidity :(

[@matthewallen4295]

@@SniperAlys I'm coming across the same error. Were you able to solve?

[@matthewallen4295]

@@SniperAlys I was able to solve it dude. Hit me up.

[@SniperAlys]

​@@matthewallen4295 yes I solved it too, it was a problem with the Solidity version if I remember correctly

[@matthewallen4295]

@@SniperAlys Okay cool, i did it another way. But i'm now running into a new error with the test section.

[@sugamkuber9057]

can you please tell me the VSC extensions you used

[@WebDevCody]

I think I just used a solidity extension

[@nh7788]

How long is the waitlist for Copilot?

[@WebDevCody]

I’m not sure I got in a day after applying

[@dhanviakash726]

Where those money paid for tickets will go ??

[@WebDevCody]

Into the contract. You’d need to add a withdraw money to get it out

[@dhanviakash726]

@@WebDevCody if we add a withdraw money option First user with id 0 will get that money right?

[@WebDevCody]

@@dhanviakash726 you can code withdrawal to send the contract balance to whatever other account address you want.

[@dhanviakash726]

@@WebDevCody okk thank you...

[@Regalman]

none of this works truffle is broken