What You Are Changing

As per the docs, The buyer can prove that the NFT collection was originally signed and created by Picasso himself because the NFT would show that it came from a smart contract signed by Picasso. Remember, **Picasso signed the collection with his public address!** Usually, artists publicly announce their wallet address so no one can pretend to be them!

Shouldn't it be private key? I think Picasso would sign the collection with his private key and artists announce their public key, so that it can be verified that it was signed by Picasso's private key.

Translate into spanish the Section_1-lesson_1 of Solidity_And_Smart_Contracts course

What You Are Changing

unable to upload terminal screenshot at the end of the lession
Clicking the button does nothing.

Screen Recording:
https://user-images.githubusercontent.com/32238400/143722462-c0afedae-7d0b-48fc-b720-297008e9077a.mov

Client details:
Mac OS | chrome | 95.0.4638

What You Are Changing

leave more "food for thought" for the hungry, more pointers to going deeper and more pro.

• how to charge for mint?
• how to add a creator fee for resale?
• how to use hardhat and web3 / ethers and run it locally instead of rinkeby. I got pretty far with that.... but hit an error.
  -- there is some cool stuff like npx hardhat node to run a local development you could at least hint at.
• how to map the number of possible combinations to the number of nfts available and make sure that there will never be a duplicate, that could be cool

What You Are Changing

The code to show the toast is using the state variable boss instead it should be showToast, fixed the same.

Anything else?

Created a PR for the same #277

During the course I didn't want to just copy and paste the code you showed, I wanted to understand what exactly was added, and having a diff should help with that.

But at the same time, I understand that it will be harder for people to just copy and paste the code because they'll have to remove + and - at the beginning of the lines.

^ from @sergey-tyan

Started on this PR which was a pretty cool way to approach it, but would require us to change all our lessons to account for this #136

Course Title

Build a Web3 App with Solidity + Ethereum Smart Contracts

Lesson Title

Deploy locally so we can start building the website

Why Are You Updating it?

Adding the accountBalance variable declaration to avoid issues when running the deploy scriptt

PR: #6

What You Are Changing

A small typo in the instructions.

What You Are Changing

when listening for new events isn't it better to filter the events to the current account to avoid a problem where there are multiple people minting at the same time

Anything else?

The course is wonderful. 😁

when I run this command the following error pops up and after i write ' solana --version ' it says "zsh: command not found: solana"

Please help me fix this.
./scripts/cargo-install-all.sh .
./scripts/cargo-install-all.sh: line 12: greadlink: command not found
Install location: /Users/aksharmehta/solana (release)
Note: Performance libraries are only available for Linux

• '' build --release --bin solana --bin solana-bench-exchange --bin solana-bench-tps --bin solana-faucet --bin solana-gossip --bin solana-install --bin solana-keygen --bin solana-ledger-tool --bin solana-log-analyzer --bin solana-net-shaper --bin solana-sys-tuner --bin solana-validator --bin cargo-build-bpf --bin cargo-test-bpf --bin solana-dos --bin solana-install-init --bin solana-stake-accounts --bin solana-test-validator --bin solana-tokens --bin solana-watchtower --bin solana-genesis
  ./scripts/cargo-install-all.sh: line 130: : command not found

Course Topic

• deeper dive into Solidity smart contracts
  • the web3 course has been GREAT to get an overview of common FE tooling and a bit of smart contract writing...it would be great if we could have a follow-up as a deeper dive into writing smart contracts.
  • ex: breaking down a well-known, existing smart contract by finding it on etherscan and using it to teach holistic concepts beyond syntax. These concepts could further be cemented as part of more complicated user project. As a follow-up, users (or groups of users) could do their own independent research on a smart contract of their choice and create their own smart contract(s) using what they've learned.

Have You Taken a Course On This Topic Before

• nope!

Do You Want To Write This Course?

• don't think I'd be qualified to write it, but would definitely be down to pair up and learn

What You Are Changing

In Ethereum this is easy. It's all synchronous and atomic so we don't need to think about that.

Shouldn't this be asynchronous? Meaning not happing at the same time?

What You Are Changing

Some of the end-of-section modals contain typos. Grep for "alongisde" and "alonside". Should read "alongside"

Add a note to reconnect wallet if you encounter the "Call revert exception" issue

• A bunch of people in discord had this "Call revert exception" bug and got really frustrated by it.
• After a bunch of googling and testing, I realized it's an issue with the signer not being able to connect with the contract ABI. It happened because my metamask was on a different network while I was working on the project. source
• I fixed it by disconnecting my wallet then reconnecting on Rinkeby!
• It would help folks to add a note somewhere in the lesson that if they see this error, they should do the same!
• Not sure if this is coming up later in the course, but would be useful add validation that prompts the user to change network instead of throwing this error.

Course Topic

After taking this course, I'd like to be able to answer questions like:

• What problems do web3, cryptocurrencies, and blockchains solve?
• What is the essence of these technologies? What are their key properties?
• Suppose these technologies become mainstream solutions in the future. What might that future look like?
• What are some of the most promising applications of these technologies that have been released or are in development?

Have You Taken a Course On This Topic Before

No

Do You Want To Write This Course?

I'd be open to participating in discussion about the course design.

Other Thoughts

I think it'd be useful to have a course like this that focuses on these kinds of bigger picture questions. If such a course isn't a good fit for buildspace, I think it'd be useful for buildspace to link to some resources that explore these kinds of questions.

What You Are Changing

I'm not exactly sure how to make this lesson better but it was much harder than the previous lessons and not necessarily in a good way. I think the lesson falls apart at the part where it reads "Where do we call this brand new getAllWaves() function, though?". I think its good to challenge students but not everyone is at the same level. For those that want the challenge, they are free to meet it, but there should be a tip/hint/solution for those that are not able to meet it.

I also think that it would be better to post complete code snippets of files with file name and where the change should be made (Replit, Smart Contract, etc). Sometimes the Lessons mentions this explicitly but sometimes its not very clear whether we're changing the contract or website and what file we're changing and where in that file the change should be made. Links to source code would be helpful. For example, I was not able to complete this lesson without finding Alec's gists.

What You Are Changing

In the Transactions subsection there is a sentence that says: For example, sending someone Ethereum is a transaction because we're changing account balances..

I think the correct term here is Ether, not Ethereum, cause ETH or ether is the actual currency of the Ethereum blockchain and therefore is the one that can be transferred among wallets. May be I am being a little picky here, but I think is important for beginners to understand the differences between this key terms

.

What You Are Changing

A short description of the change you made and why!

This line breaks the UI, the 'container' isn't displayed at all. I had to comment to work fine, also div tag isn't closed.

What You Are Changing

• In the M1 solana install guide, I ran into an issue running ./scripts/cargo-install-all.sh . even after installing coreutils. It was a problem with openssl.
• I installed openssl via brew install [email protected] as recommended by this tutorial
• Got another error about linking. Implemented another thing by the same tutorial
  • adding the following to ~/.cargo/config

[target.x86_64-apple-darwin]
rustflags = [
  "-C", "link-arg=-undefined",
  "-C", "link-arg=dynamic_lookup",
]

[target.aarch64-apple-darwin]
rustflags = [
  "-C", "link-arg=-undefined",
  "-C", "link-arg=dynamic_lookup",
]

• Then it worked

Translate into spanish the Section 1 Lesson 3 of Solidity_And_Smart_Contracts.

What You Are Changing

The url provided for the thirdweb governance contract on github isn't correct

Its supposed to be https://github.com/nftlabs/nftlabs-protocols/blob/main/contracts/vote/VotingGovernor.sol
!

What You Are Changing

I believe there's an error in the code contained in the project documentation for the last lesson in section 1

In the runMain const, when there is an error, it should read "console.log(error)". It currently reads "console.error(error)"

Translate to Spanish lesson 1 of course solidity_and_smart_contracts

What You Are Changing

Problem:

• mintCharacterNFTAction is being called multiple times on render.
• the reason is instead of passing a function to call mintCharacterNFTAction to onClick on line 141, it calls the function there currently.

Solution:

• Create an arrow function that called mintCharacterNFTAction and passed it to onClick.
• I'll link my PR here

Anything else?

Thanks for building these great projects, I've been enjoying it so far! Keep up the good work.

Translate into spanish the Section 1 Lesson 2 of Solidity_And_Smart_Contracts.

I am not able to add the translate label.

What You Are Changing

Changing { to ) in the checkIfWalletIsConnected function in Lesson_2_Building_Connect_Wallet_Button.

Anything else?

Nothing. Thank You for such great content.

adding copy option in every code-block, will help the user to copy the code easily

What You Are Changing

A short description of the change you made and why!
I am making a grammatical change to this line:

"Trying to withdraw more money than they contract has."
to this
"Trying to withdraw more money than the contract has."

This fixes a grammatical error and reads better.

Anything else?

Any other thoughts or concerns? Let us know!

What You Are Changing

Section 3 - Lesson 'Build some loading states' has been removed, but the code that it relies on this in the next lesson is not updated. This is causing errors after copy-pasting the code block at the end of section 4, sold-out state lesson, which is preventing the HTML from rendering and blocking students from progressing.

On the last code block:

1. candyMachine.state && ( should be candyMachine && candyMachine.state && (. By the time this HTML renders, candyMachine is still undefined, so we get a blocking error before render.
2. Delete disabled={isMinting} because isMinting state is not defined and its breaking the code before render.
3. Remove {mints.length > 0 && renderMintedItems()} {isLoadingMints && <p>LOADING MINTS...</p>}, because mints, renderMintedItems and isLoadingMInts are undefined so they are breaking the code

Anything else?

The second and third fixes are short term fixes so the students can complete their tutorials.
In near future I would like to implement these missing features.

Is it possible to implement a darkmode ? for the projects ? at the moment its really bright when changing windows from vscode.

As of now the projects page looks like this
https://ibb.co/CHgvVGs

What You Are Changing

Language-level tweaks for clarity.

Anything else?

I'd like to revise the prose here and there and add a few subsections for cleaner organization.

I am going through the installation steps for M1 Users in this repo.

Terminal Command:
./scripts/cargo/install-all.sh

Expected Result: Installation complete succesfully

Actual Result: The Solana instalation is very close to completing. It installs all packages up to 825/828 and fails to install the final three packages which looks to be caused by the solana validator:

`Compiling solana-ledger-tool v1.8.2 (/Users/branaust/solana/ledger-tool)
   Compiling solana-validator v1.8.2 (/Users/branaust/solana/validator)
error: linking with cc failed: exit code: 1
...

error: aborting due to previous error

error: could not compile solana-validator

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: linking with cc failed: exit code: 1
`

Homebrew is installed. I've deleted the Solana file and tried to clone the repo again but no avail.

What You Are Changing

When running the Hardhat command for verifying contracts on Etherscan, the command has an argument _totalSupply there.
and i dont think its supposed to be there.
I was able to verify my contract only after i removed that command.
Please look into this, Thanks.

What You Are Changing

Problem:

• on line 92, 132, and 158. The path for metaplex is ~/metaplex-foundation/metaplex/.., this caused error because the folder is called metaplex and doesn't start with metaplex-foundation

Solution:

• Remove metaplex-foundation from the path.

Anything else?

Yarn is required to initialize the Solana project directory

Under the sub-section: "🏃‍♂️ Create a test project and run it" we're instructed to create a directory and initialize a Solana project using anchor init myepicproject --javascript - this cmd will partially fail if the user does not have yarn installed. The terminal will return: Error: yarn install failed: No such file or directory (os error 2)
⭐️ Recommend adding a line to install yarn if not yet installed: npm install --global yarn :)

Spanish translations populate english site

This effects the page linked here. The site seems to auto populate the Spanish translations.

https://app.buildspace.so/projects/CO02cf0f1c-f996-4f50-9669-cf945ca3fb0b/lessons/LEc9263031-fd3e-4af8-8f12-d366099bfe8a

! small syntax fix needed in the instructions. Need to add the ";" to the end of the new 4 lines to call makeAnEpicNFT function, or else the makeAnEpicNFT function doesn't run.

Course Topic

Interaction with other contracts.

One of the most important things in blockchain, and also one of the most difficult, is to interact with other contracts.
How do you start working with another contract without having to use main net?
How can you test against this contract when you probably don't have the resources it requires

I think it would be awesome a course that:

• Gets the current balance of a wallet of some ERC20
• Grabs the coin price from Uniswap
• Gets the current APY of that coin in AAVE
• Deposit the token in AAVE (because we need to do some writing too 😝 )

And maybe end it with getting some data off-chain using some oracle

Have You Taken a Course On This Topic Before

Cryptozombies but only covers the coding part, no idea how to test without having to deploy in mainnet

Do You Want To Write This Course?

I can help, but I don't really have all the required knowledge for it 😢

What You Are Changing

In the first code block
pragma solidity 0.8.0;
Was throwing an error for me. Adding a " ^ " and changing to
pragma solidity ^0.8.0;
Cleared this.

Anything else?

Unsure if the required use of " ^ " is just a quirk of the language.

What You Are Changing

As mentioned in issue #141 - I suggest you change the text at the following location:

https://github.com/buildspace/buildspace-projects/blob/main/NFT_Collection/en/Section_0/Lesson_1_What_Are_We_Building.md

From line 36 it says the following:

To claim the NFT, you'll need to pay [gas fees](https://ethereum.org/en/developers/docs/gas/) which are fees that Ethereum charges you to perform transactions on the network. Gas fees to redeem the NFT vary. I recommend transferring around $30 - $50 worth of ETH over to your wallet.

If you don't know how to do this, don't worry about it for now — not required!

*Note: The project itself doesn't require you to have any real money at all! We'll still be deploying to the blockchain using something special Ethereum provides us called a "testnet".*

As mentioned in Issue #141 - this has been made redundant as the NFT's are being issued on the Polygon network so no ETH cost.

Anything else?

On line 30 change the following image to this instead to reflect the appropiate NFT for the course. Yes, that's a screenshot of my NFT

What You Are Changing

Change Submit Link To Your Replit Site to Submit site screenshot for those who develop locally

Anything else?

Other suggestion in my comment on gist:
https://gist.github.com/adilanchian/9f745fdfa9186047e7a779c02f4bffb7#gistcomment-4022427

What You Are Changing

Clarifying getting the direct image from imgur

Anything else?

This is an issue @zzJZzz found, but needs a tad bit more time to get the PR together :)

What You Are Changing

When performing anchor test for the first time on MacOS, I received the error message Error: Cannot find module '@project-serum/anchor'

The fix for this is to add export NODE_PATH="$(npm config get prefix)/lib/node_modules" to your shell script config file and then source it

source ~/.zshrc

I saw three other mentions of this in the Discord. I'll investigate an editorial change to the lesson to include a note on how to handle this error.

Anything else?

Any other thoughts or concerns? Let us know!

What You Are Changing

I just wanted to give a short and quick suggestion for the imported abi. Because the JSON is essentially an object you can use destructuring and renaming to import the abi, like:

import { abi as contractABI } from './utils/WavePortal.json'

What do you think? Works for me

Course Title

What is the title of the course you are updating?

The title of the course is Build a Web3 App with Solidity + Ethereum Smart Contracts

Lesson Title

What is the title of the lesson you are updating?

The lesson title is located at Section 2 / Build web3 app that connects to our wallet and talks to our WaveContract / Call the our deployed smart contract from our app

Why Are You Updating it?

A short description of the change you made and why!

" Call the our deployed smart contract from our app" should be -> " Call the deployed smart contract from our app"
or " Call our deployed smart contract from our app"

I am updating it because there is a grammatical error.

What You Are Changing

For the project(s) that use import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; and then inhert ERC721URIStorage, the compilation breaks. This is caused because previously the import was import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol"; and changing back to this works,

Anything else?

Was added via below PR merge.
#740

What You Are Changing

Not a change but a suggestion. Please look at the following link.

https://github.com/buildspace/buildspace-projects/blob/main/Solidity_And_Smart_Contracts/en/Section_0/Lesson_1_Welcome.md

From line 56 it states:

To claim the NFT, you'll need to pay gas fees which are fees that Ethereum charges you to perform transactions on the network. Gas fees to redeem the NFT vary. I recommend transferring around $30 - $50 worth of ETH over to your wallet.

If you don't know how to do this, don't worry about it for now -- not required.

Note: The project itself doesn't require you to have any real money at all! We'll still be deploying to the blockchain using something special Ethereum provides us called a "testnet".

This has been made redundant as the NFT's are being issued on the Polygon network so no ETH cost.

Anything else?

Same issue on the 'NFT Collection' course but I will submit a separate issue for that.

Not sure if this is an issue on my end or actual invalid links.
The discord link in this repo (https://discord.gg/CFuBU7RJ42) is invalid as well as the one on buildspace.so (https://discord.gg/mXDqs6Ubcc).

Would love to submit a PR to fix with a permanent invite but it looks like users can't generate invite links.

Whats is the license of this project?

What You Are Changing

Changing the grammar we found to be a little to informal and removing contractions to help a worldwide audience better understand what they are reading.

Anything else?

Any other thoughts or concerns? Let us know!

So, we now have a full-fledged web app that can talk to the blockchain!

Now, if we remember we want our final app to be a place where people can come, wave to us, and send us a message. We also want to show all the past waves/messages we've gotten. That's what we'll be doing in this lesson!

So at the end of the lessons we want to

1. Let users submit a message along with their wave.

2. Have that data saved somehow on the blockchain.

3. Actually show that data on our site, so, anyone can come to see all the people who have waved at us and their messages.

Check out my updated smart contract code. I added lots of comments here to help you see what changed :).

https://app.buildspace.so/courses/CO02cf0f1c-f996-4f50-9669-cf945ca3fb0b/lessons/LEe9f04c2e-fe9c-4e87-81b2-efb677a1720c