Ethereum Foundation DevCon 6 - Developer Infrastructure Track, 14 Oct 2022

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From YouTube: Introducción a Scaffold-ETH y SpeedRunEthereum by Carlos | Devcon Bogotá

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https://archive.devcon.org/archive/watch/6/introduccion-a-scaffold-eth-y-speedrunethereum/

Descubre las posibilidades de Scaffold-ETH para desarrollar aplicaciones full-stack en Ethereum y mejora tus habilidades como programador de Smart Contracts gracias a SpeedRunEthereum.

Speaker(s): Carlos
Track: Developer Infrastructure
Keywords: tooling,education

Follow us: https://twitter.com/efdevcon, https://twitter.com/ethereum
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Devcon is the Ethereum conference for developers, researchers, thinkers, and makers.
Devcon 6 was held in Bogotá, Colombia on Oct 11 - 14, 2022.
Devcon is organized and presented by the Ethereum Foundation, with the support of our sponsors. To find out more, please visit https://ethereum.foundation/

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My name is Carlos: Sánchez, I have been a software developer for many years,, but it wasn't until Although I've been a user for about 4 or 5 years,. It wasn't until last year that I got serious about development, I'll. Leave you with Also. There are my networks: Happy Twitter I'll. Let you know that it's good I'm, much more active on github the summary of what we're going to see today. What I 'm going to tell you? Are these I've divided it into three steps and the first is scapho Liz.

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This is a tool we use In bilgild,. We have left it to us and it is a tool that solves all the Turing problems and helps you to prototype your application. Very quickly. Then. We will move on to Spiderman,, which is already like a platform to overcome a series of challenges and it is to expand. Knowledge. Things are already more advanced and the last step is the Zara community that I belong to,, which I will tell you more about later and I.

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Think it is the perfect place to continue collaborating in the ecosystem and get to know Also, with your own interest,. You can see that above I put learning by building, by that I mean that it has always been said that there are different ways of learning things,.

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There are no people who say that learning in a more visual way, people who learn more from in a more theoretical way, but I believe that when you really learn and when the knowledge is really internalized,, when you start to do it,, when you get your hands dirty,, then all these three steps are based on the same thing,. They have the common denominator,, which is from the minute you start You, are not programming, doing something And. Yes, it is true that Well at first it can be a bit uncomfortable.

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There will be a lot of gaps that you have in your head of knowledge that you do not know, but if you continue I assure you that It is good, that those gaps are filled. Of course, They are the only way to learn or launch yourself into the decidium world,, but it is the way that has worked for me: and, well,, for hundreds of people who I see that they go through these three steps. The first step is scapholid,, as I told you. Scapholid.

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It is a free software, tool, of course, free for everyone that you can download to your computer, install,, and it gives you everything you need and even more to create. an application, and it's very good because good If, you come from the javascript ecosystem, for example,. You know that Well, in the end,, what is the tuli,? Not the Setup of the project is sometimes a bit complex And. You have You know how to program in javascript, but of course, until you mount the whole environment is not difficult for you and with scapoli.

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What we do is assemble, let's say all the structure you need and we connect it, not the internal wiring, and then you don't have to worry about certain things in a way of learning.

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It's also once that Everything that you know,, let's say, handle the commands and that and that you use The magic of scapho Live, that to dive into the code, and so you can also see how it works internally, Being that version 1 is currently in hard hat for the Smart Contract part with solidity and in the Front part it is using real with with crisviactap. We also use ideas, Yes that is good for communication. With these Smart contracts, I put 1 there Because. We are currently working on version 2,. It's going to be good.

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With this one, a little more modern,, it's going to use Netflix and we're going to let you choose between hard and foundry in the smart contracts part,, which is also fandy, well,. It seems, like people prefer it., But, hey. We will leave the two options. This still in development, But. Well, I leave it there for you to be attentive in case. You want to try it too.

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Then Well I am going to apply what I just said in the previous slide, to be practical and not so theoretical, and we are going to get Call us at work and I'm going to show you a little how scapholice, works. You can find it.

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If you Google it, it's the first thing that will come up, something I haven't said. Sorry. At the end of the presentation, I'm going to leave a QR that you can scan with the links to everything, I'm saying both to the slides and how it says to everything. I'm saying it in case you don't want to take notes. That's like that If you want But hey,. He escaped, look in Google, the first thing that comes out, well,, the typical repository that you have to clone,.

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You need not from yaro that we use and well, I've already done this first part, also, well,. The internet is working very well here: today. So,, well,, I, 'm, glad I did it before,, but well It's the repository,, then in the folder and installing the dependencies, of course,. This usually takes a while. And even more. If the internet doesn't work,, it doesn't work very well,, so well, I've already done that, I've already done it in advance,, so well,, like all the dependencies. installed, we are going to start.

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We are not going to launch escafolios and for this the three magic commands are launched. The first is yang.

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This is just like npm another package manager, and this is going to just launch a command that is defined in the Jason el gh pack. What it's going to do is start a local, hard, hard node, basically as a local blockchain and an rpc server, so that we can communicate with that local blockchain when we're developing. Obviously we want to Test with some non-local test because we don't want to spend it,.

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Even if it's university testnet,, we don't want to have it,, we want it to be fast and we can just remove it and put it back on without any problem,.

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The second thing we're going to do is the second Command is yane Start. This simply launch the front.

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We are going to leave it here that maybe it is a little and the third one that we are going to be using. The most is Gear deploy like this without any without any parameters or anything what it does is unlock the contract that comes as a test. Let's say the contracted Hello world, not escafolid in the local network. In fact, now you will see that as soon as we give it the one on the top left in the block without local What we have is not our node,, it looks whatever it is,.

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Let's better continue a little bit and see here, How the contract has been depilated,, not the transaction information, the address and so on.

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Well,. Now it's loaded,, but well, I'm, going to show you the folder structure first.. Now this is already running the two upper tabs, the two upper terminals that will be blind. It will be the blockchain that will be running until we stop it and the frontend and the bottom one. Well, we will have it to continue unlocking contracts.

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This is what it looks like from escafolios that as soon as you load it,, it's the most beautiful thing in the world, I admit it But well,, keep in mind that you can then put the one you want.

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It has a lot of things,, don't worry, we'll see more or less the most the most significant so that later you can start pulling the function. Read more I like it. Descapolis is this component that we have created here by contract this. What it does is. It adapts automatically with the local contracts,, so look, I'm, going to show you the contract, first.

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Well, a bit about the folder structure,. Also here that I told you, okay,. This is the folder structure, where we're going to be the most. in the pay folder, and especially in these two in the hard hat for the smart control part and actually app for the Front part. Later Here are other slightly more advanced services that well I. Don't think we'll see today, but you know that too The contract is available,. You can find it in the Harvard contracts folder, and you are going to see this contract Hello world, I was telling you,.

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It is not a very simple concept,. It has a purpose variable with a default, value., Well,, an event declaration, an empty constructor, and then a function that simply what it does is change that purpose. When we call from our frontends to be, well,, we will base a new purpose on it and simply what we are doing is changing it and well and emitting the event. Then you see that this is exactly what is being seen here in the Front, and this is passed automatically How.

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This happens, I, don't know if you know, when you compile a solidity contract, several files are generated, and one of them is the Avi code of the contract that this is nothing more than a file Jason. That is the specification of that contract is telling you. Okay, we have a variable that we have a model that is greater Contract, a variable called purpose and a function that is called set, Corpus with a parameter So. Now what this component does is- and it mounts this Smart against- that is, Sorry this this Front with everything necessary So.

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For example. Now we could try to say okay, let's put a new purpose called Hello and we are going to send it to see what happens. Ok, it does not work. Why Because? We do not have money 16 fixed when I have loaded the page. That is here with a wallet connected right. T You have the Connect here and I. Could here connect my goal more, but of course this for local development is not very agile, Why Because.

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If now, for example, I connect, my goal more and I have let's say local ID I could send this, but I would also send it would open my goal. More I would have to confirm blah blah blah. We don't want that for local development. So in escapolis we have developed what we call Warner wallets. As you see in disposable purses. No, and they are purses. It is a goal that is created in memory.

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In fact, if we see here we go to the application Here, we are going to see,, don't worry,, it's a private key But I'm going to delete this later. So,, nothing happens,. But this is a private key that has been generated. Randomly in the Front to have,, let's say, a hole which already connected, then we can send transactions at the moment being that the browser already has our wallet. Our private key We do not need metamask to confirm in a transaction. Then Then look at it that ends at 71 C.

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So you can see how it works. If now I'm blunt this local storage, now I would reload And instead of 71c Well,, it's going to come out again. This is 8c. You can also try it. If you go to another one, for example, incognito tab, you will see that here it creates another name. They are all finishing, I, don't know. What's going on eh a conspiracy.

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This is very good to have several players because you can open different browsers or different incognito tabs and you can interact with the Smart Contract as different identities is one It's time to say,. Well, look,: this is the administrator. This is a user and well,. It's very good, because it's very fast and there's no need to sign anything. We're not going to talk about action of course.

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That it is a local phase, we can give it here. This sends us a transaction and they should continue to update month. It has sent us like 0.01.

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If we want more, we can cut our address ion and we could go here below. You can see that it is like the current value of Edith, the value of gas and others. We also have here one more phase. Let's say with all this money leave hud and then we can pass our address here. Put well We want to know we want two and we send it to us So. This is going to send us. We already have money available here, money, of course, Not real No I wish it weren't that easy.

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But this is the money it is only for the network. In fact, yes, the yamchain tab that we have executed. Yes now I If I closed this,. It would be lost, no,, because every time we reset it, it all starts again. Well,. Now you know what the Warner wallets are,. We already have money, now I'm already in principle,. It should work,.

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We won't see once with we send, and you have seen that automatically and the variable of that contract has changed. Ok because I like this component, so much because now we can come to the Smart Contract and say: let's make some changes. Io, we are going to make a change,. Let's see what it is, for example,, we are going to define an integer called public that is called counter, no Counter, and now we are going to make it so that when someone calls this function, the counter is increased by one.

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Now we are going like the contract. A contract has changed, it cannot be edited once it is deployed there. It is not there, it stays So. Now we are going to come back here and we are going to do a Chloe key. Sometimes it can fail. This can be done. Let's say what it does is: delete the folders that from the compiled files and runs it again then Well. Now we come here and you see that automatically without me touching anything it has been reset and the frontend has been adapted to our Smart Contract.

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Now we are going to try here no Hello now I command the transaction and the counter should increase This good I, don't know what you think it seems. Wonderful to me. The truth is because well it is a way of playing with Smart Contracts in a very simple way, and not only because c Like platforms like remix and out there that you can play, compile and test,, but it doesn't give you this facility,, not in this French language, that you can play and try it immediately,, which I did when I started with this.

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Well, I went to this page. It's great, the truth is,. It has like many examples, and so I went one by one trying copying and pasting. We're not going to see what we can, what we can take from here, for example,. You want to know how solidity mapping works. You, read the theory very well,, bla bla bla. It fits a dictionary, type value and Well, I'm going to take this one here and I'm going to paste it into the Smart control,.

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Okay, we're going to call it User Counter,.

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You see that it has a key that is an address and a value that is an integer. Now. We could see how it works,, no, how to add values, How to obtain them and so on. So here we can do it now, since we are with the roll. This of the counter, you can say: ok, And be Counter. Now the key It would be the address of the user. That is calling this. That is calling this function, that in solidity we have these global variables. For example,.

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It is a table sender that this will automatically transform it for the address of the person. Well,. If it can be a wallet,, then it is a Smart Contract that she executed this transaction, and here we are also going to add one the same. We have made this change that we have to do it. We automatically give it if we go to our Front. This should be updated. You see here that you have the song that has appeared new And. So now, when I call this function,, apart from increasing the general.

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Counter,, the counter of my user is also going to be increased,, not of my wallet of my A3.

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Giving as a very example. In other words, people do not make much sense for mapping to be understood,. What they are doing is simply like com or a dictionary. I, don't know if you know, if we in some other language that has a key and a value So.

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In this case, it is telling you that the key is an address. One 3 and the value is an integer. So here, if you have seen, we have it Le, we have called So, when calling that function,. What happens is that we are passing it as a key in the address of the person who is running this function and we are increasing it by one,. It is like simply to save a record, not the same as we had The Counter this well That's another counter that is good,.

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It makes a lot of sense in real life,, but it 's for testing,. We 're not going to see what's happening here, because something is going off,.

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Try resetting this,, yes, I think this is over the internet, well, I'm, going to try another one. time and if not reset it.

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Let's go for a second Sorry Ah look here. Something is happening. Okay, great!

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We are going to kill this.

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Things from the direct, if not We, will continue with other things. Do not worry When. We have time like this Besides,. You see that what happens in real life is not,. It's not,! It's not all like those YouTube videos that you see that last 5 minutes No, and everything turns out perfect, everything.

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Is always okay, come on,? Let's see again.

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So we'll review a bit.

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Ok, this is already compiled so Well. What I want you to see with this is how easy it is to make changes to play and test in a very simple and very visual way, because what happens is that sometimes we do a Smart Contract, but Of course, as you test it,, you don't have to develop a frontend to be able to interact with it. I'm. Also saying that this is the way to play a bit and test. Well, already loaded, here, I, don't know very well,, let's see if it works,.

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Okay, we're here Now. If you try this address to see if it works for me now, you should return one Now, yes, Well I, don't know about strange things that happen. Sometimes what I was saying that this is very good to play and to create your Smart against him initially, but if you want to do, if you want to go seriously with a project, what we should do is tests not automatic tests that also here comes a folder with a test that is run with tires.

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In fact, we can run it here and this It's a more automated way of testing our tests and we don't have to trust ourselves there playing with the Smart Contract,. This texting tool is also very good because it gives you, like, the amount of gas that each function has spent or each call as we have a lot of time. We are going to do something else here. I want to tell you more things: But I want you to see more possibilities of solidite and with scapolid, for example.

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Not if you know the pattern of a Ball that is good with offers us many libraries when Sometimes, we have to implement something in our Smart Contract and we don't want to reinvent the wheel. Sometimes, it's better to trust someone from a software library. free software that is highly revised, and we can extend that library and we will have life much easier and we will make mistakes. This library is very simple: it introduces us to the concept of owner, not like the owner of a Smart Contract. Sometimes There are certain actions,.

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It is a Smart Contract Well,. There are certain actions that you don't want everyone to execute,, but only because a certain person,, a certain wallet, offers us this modifire that we are going to see how it is used And. So now we could simply import this library and This Well,. If you know any other language,, it is like inheritance,, not the typical inheritance. So when doing this automatically,, just with this, notice that, when doing deploy.

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When doing deploy, I already have a lot more functions that are not in my contract but of course, Having inherited from a Ball,. Certain things have appeared: here, not like joining,, like giving up ownership, how to transfer to another owner and others, I. Don't know.! It is a problem right now, of course, I say: okay, I want to execute this as the owner of the Smart Control. But of course here it is telling me that it is a man that is not me not because I am this person.

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This is my wallet and instead it is coming out. This So, this If I ever work with hard hat. You know that they are that it is mythical. This address. The f-39 is the address that the first address of the lemon that has harham no So by default when you make a deploid, the localhost uses this address as de Player address So. This helps me to introduce the deploy file inside the Play folder We have here what is the Script that does the leploy?

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This Script is going to be executed to the same for localhost because we were executing for localhost But. This is, it can run for any network. Even then good Here. We see that when a deploy is done, it is using the Player account and this Player account automatically. The loc alhost uses the one from jarja that sf-39, but what we can do is do I have commented here. We can call the function of our contract, that is called transfer ownership and we can make the owner be us that I will tell this address.

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I will paste here the address and automatically when the contract is deployed,. A second transaction will be executed that will pass the current Player,, which is f39, to us. Now. We are going to do Here. We are going to make a recipe here, just in case it is safer and well. Let's see, let's go to our wonderful background right now. You see that we are the euner.

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Now that we are the uner, we can go to any function and, for example, we are going to implement a function for the purpose of setting it to zero emptying it not how to reset it. Well, the function could be pups. No, for example, parameters. We need no. If we are going to clean it, it is not necessary. It is not a public function, but we are going to use this mobile. That I told you is called olio owner, In So.

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This already gives us the magic that, when this function is called, it will check by default. If the caller of this function is the Owner, if it is not the owner, it will reverse the transaction and tell us sorry, you can't, and this is simply what it does it is. We can do it like this, not to reset it. We do not put it as an empty string and that's it come on. Let's do the new Play network.

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Okay, I think it has worked. Okay, let's try if now I open this with another user in principle also the Clear function does not allow us I should leave. Let's see what happens.

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Well, first, is that I don't have Ah well. It already tells us that we are not the one, so I can say: I don't have money, but well, even so, it has already been ready and has told us I'm sorry, but no, it is not the owner So. If now I go to the other tab that my Owner had here,, we don't see here the 8c 8c if he calls this function now. It has left me and you see that the purpose has been reset to zero, then good with what you have to deal with.

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This is how easy it It's, the literal thing,, not copying, things, pasting them here,, trying them out, something breaks very well,. What's happened, we'll fix it, we'll come back here,, not this,, this loop, a little bit of learning for me,, it's what has helped me the most,, it's not worth more or less,. I've already told you everything about it.

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this component, because escafolid comes with many components and many utilities that now I am going to teach you some more to do, because now we are with the part of the development in solidity, not of our Smart Contract, the frontend part would remain and all the deploy part would remain. Let's go a little bit with the deploy part,, which also seems very interesting to me, imagine, okay,.

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We've already made this piece of smart contract,, which I do n't think is very useful, no,, but we're going to do it as if it were our test, Smart Contract, and now we mean we already want to publish this Smart Contract. The logical thing would be to publish it to a test network. No, it doesn't make sense to put the mainnet on it. No without having tested it first. So escafolis allows you with this Command that I am not going to execute because I have already done it.

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But this when doing this, I wanted a wallet in your directory with a siffrey and from there. That wallet will be used to make the transactions of deplay as I have already created it And. It will simply create it and you can do it callacount this.

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What it is going to do this is going to take that demon is going to take the first Adress and right now you can see that it is showing here on the screen, Well a QR that you could scan and send back,, not, for example, this should have some testnet in Google that you see there. I don't have some balance But this, for example,. You can create your wallet here and then, with your valet scan the QR that appears above and Sending him.

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Some funds is not worth how difficult it is to deploy in Google So that you don't know it's like one. It's like one. It's not like a copy of meiner with test transactions. Currently, before the month we had like ri, n Kevin and couban and Rammstein But. It all seems to me that they have had a better life.

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How do we do a deplayagoberry? Do you remember well Look how simple just now Network that is, we put the flash of Network and the Net because we want and this if the internet works, that Now, we'll see, I should do a deploy in coverly, we're going to let her see a bit,. It doesn't look very good, really,, because if.

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Yes,It 's working Yes,, now I'm going to show you there is a file called ya. You can configure all these things in one. No Gas is so important,, but for example, it would be important if you were not sending a transaction and you want to set a low gas, no, and that it be executed. Whenever, no, that can be configured both in the hard Hardcore file and I have taught now, or you could also do like this The Command exactly, but it's like gas price and you could put the price here in wave.

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But if you don't put anything that is like that, execute d Let's see what the file says by default. Ok then, when we do when we are doing these Network things, what we are doing, overwrite that call no And it could be for the Network for the gas or whatever then well. It seems that it has behaved good internet and we have here. Our contract has been declared in this transaction. At this address we could copy this address. We could go to ydresscam and rest Of course, because we are not in mairena.

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Now we could here Search for our contract, address: ok, And! Here you see Great, you see that Two transactions have been executed,, one of the deploy itself and the other, I. Don't know. If you remember that we have changed the owner,, it is not a transaction to change the owner, other than.

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Some contracts,, the majority, should be using you,. They are verified,. It does not come out as the check, not the green check when you are verified. It is simply saying: ok this one here that we have s of employee corresponds to this source code, because you see this and here it is difficult to see no, and it is difficult to audit. If someone tells me hey, connect your mask meta and interact with this contract. I will tell them well.

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No because of course, No I, don't know, I, don't know what it's doing, no, then Scafolios also offers you a tool,, a tool,, not a command that you can do already, very file,.

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We would say the same thing, networkly, and then the address,, the edition of the contract,, and this also sometimes takes a little time. Well,. They are Depending on the internet,. What it does is simply that it is not taking Command from inside the hat and verifying the contract..

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We are going to wait a little bit to see if there is any luck and if we do not move on to something else,, then well,, you realize that with a single tool that can be scapholice, There are a lot of utilities that allow you to really do everything. You need, I mean,, because we've been here for 20 minutes and we've already got to capture Contract, we're verifying it. Hem We've played with it, we've done tests, so,, well, I. Think that's why I scoffed a good tool to get you started in the world.

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This seems to be a bit left. Over. Let's, see if we'll leave it there.

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Just see, no,. Now we already have the famous green tick and now look, we saw here and we see, and well, no, we don't,, that's not important. The important thing is that the people who are going to interact with our contract will see here that the source code is really. It is the one that we say is not Well. I think that for this part alone, it is okay. Yes, there.

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Can be your own Smart Contract to verify it here.

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Or how do you mean this Command No delfy? Of course, this below? Let's say it is wired for to grab the commands, the contracts that are in the project. You could not verify a contract that is not within your environment because you would not have the source code.

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You know you say you say here and you put your contract here. You say Yes, yes, there without problems. So yes.

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That is that I also do not know if the country has said it can be done also manually You can also go scan. You can go and there is like a here inside the part of contracts. Good I have already closed it, but here in the contract part there is also. How is this? Your contract verify it So. It is like a process what happens clearly to what you will have Well, to paste.

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The source code here in this case is very simple, because in the end, look we have three files, our contract and the ones that or a website that we are extending and the one for the context that the one of a bag uses. So. It is very easy,. We just have to paste those files and until today,, but before that,, some Smart Contract can have 20 or 25 dependencies. And then With. This Command, notice that this is.

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Yes, I understand you clearly,, keep in mind that this is not so important,. It is not so important that it be Dynamic,, because this is only going to be executed. Once, no, that is,, when it is It's from the beach, but well ,. Several ideas occur to me,, one of which could be to declare it as a variable around it,, not the same,. Then it could be in your environment.

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In the end, keep in mind that this does not have to be so dynamic because it is done once, that is, once it is fought,, you will not touch it again, no,, so that dynamism is not so important and the.

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Three, the three Yes I mean, I, don't want to go too deeply because we don't have a lot of time, but yes, I mean,. It comes with one with a Suite and Well, look here we can do an example, no,. This is what you are doing: Describe the contract, where it is the greatest contract and what You say okay,. You should support our contract,. So you go to this. If this already failed, the test would give you an error.

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But, this is normal,, it doesn't happen,, don't say: okay, This is the case of the contract that we have as a test,. We are telling you going ok, we want to put a new purpose for this new variable So. We have our contract and we go to the function to set the new purpose and we pass the parameter. This is the most important part of the test, which is the expect not which is like the lasert. We are saying. Ok, we have done this.

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We have called this function and so now we hope that our contract, if we read the purpose variable, is equivalent to this purpose. That is basically how everything works that is, you already are Well,, with this user, send money send to the other. This has to be the same to one, then. This is like a more automatic way of Test, so you make a change of smart Contract and launch the tests, and it will explode say no. This This does not work.

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That here is goodbye as a somewhat global vision of everything. But of course here it has a lot to dive,. It has a lot, a lot of things,, not good,.

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Just briefly comment on the subject,, since we have already done the Smart part against it. Laugh. The part of the Front I do not recommend that here by default, escapolis comes with an example of yubai. Again you can see if it is pretty ugly. No I mean here. The important thing is that this is done in real, that There are certain components, certain utilities and that you can interact with him, with the contracts,.

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Then you could give it the form with css or using other libraries the day you want, and it would have been very nice, not here, I recommend that you see to learn how the Front theme is going to the alpacatch riata- and here you have Let's, say all the components, hooks and utilities that it brings, and in the case of example,, you can come here and see how the different utilities are being used,, the different components that come with escafolid, for example,.

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Here we pass a component of three,, not that you pass it an address and it automatically loads you with an address where it can explain. And you were going to go to the scan. It has certain good utilities to copy it that make it a little easier for you. Vida We also have to make transactions No,. You want to make a.

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Transition here, well,, you would have here say look,. We have the transaction component,. We take all the contacts that are writing and we carry this function. So I recommend that you not go into much detail,, but I recommend that come here and see the A riad component, how it is set up to interact with it with the contract, and here Well you have more more non-event balance, components and other ways of sending,. Let's say, transactions.

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With a gift, if it is with real, that is, at the end with escafolis, what we do is to try to make sure that everything is,, let's say, like wiring underneath, no,, and it really seems like it's pretty standard already on websites, that is, it's used like.

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That,, that's it,. In the end, you usually learn that,, those small parts that we don't interact with. Ok, my goodness. If I talk, let's see, let's go back here to the presentation. Ok, escafolís I! Hope you liked this part and how good or You are encouraged to try it, because I think it is a very good utility and we got to step 2 Step 2 here. You should already have some ease to play with Smart contracts in having a bit of Frontier as they connect.

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But, of course, There is a problem that does not bother me. It happened to me, that is, okay, you get there and now you say what to do, no, that is,, because I have already played a bit and you no longer have any ideas to develop, well,. How can I continue.

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Learning? It is more than a platform that offers you a set of challenges to expand your knowledge in Solidity Although I am going to explain it to you. Now. They are full stack,, that is to say,. They make you unlock a contract and a fronted also of ployado that interacts with that contract, that is, you have to do all the shawls we have right now. Are these seven, not six. Although?

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They start at zero and are already more examples from real life , before we mentioned,, not that it's good that the example Example from before, as it was as an example, well, more of a toy to try. But. Here is an example that may look more like real life. In fact,. We have the first,, which is to develop an NFT,. The second is a staking application,. The third is an is sell and token buy and sell tokens. We have the livegame that I personally like very much.

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This plays a lot with the concept of random numbers. That you know is a complicated issue and makes you make a Smart Contract that attacks other Smart Contracts to steal money, because it is using random numbers, wrongly And from there things start to get complicated,. It is already developing a centralized 15,, a multishift goals and an nft that renders svgs enchain.

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Well, I am going to teach you a little, so you can see the platform I have this here. There is nothing more than this. What I liked in the world of web 3 that to register for something sometimes simply connect your wallet sign a message with our banking and and This is not. You do not need email or anything so connect your wallet and automatically you can enter here and see all the challenges.

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The part above there is also some Interesting link like a video of This I, think is Austin doing like so you know, Austin is a crack Greetings to Austin and well, a scafolid liaison and then also a course that we have done that. You may also find very interesting what was done with Austin and with eda, who is sitting there watching. Although she does not understand anything, she only speaks English but hey. It is a course that we have done, and it is very good because I do not know I.

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Have it here to see what it is. I recommend it to you. It is also in English. Yes, I think that at some point.

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The curriculum- and it is how it explains you from How- to become an envelope advanced to already do scripting and to do complete applications is very good Also, it's a bit like style, no, no Happy! No, but like we can do it and if something breaks, we'll fix it, eglamos no and it is very good I recommend it and I also plan to do at some point in my life a reduced version of that course in Spanish Well. Here you have the Shawls. The Shawls are very simple: You go to one. You read the rhythm.

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Everything is very well explained. I also recommend that you sometimes get into the rhythm and Well,. Then you start to do things, break something,, which will mean that, although it is good that you are going,, you are on the right track and once you have finished, you have to have used two things:.

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The contract and You want the frontend here to paste these two urls,, the one for the scan and the one for your Frontier, and this is going to be an automatic greding system where I have here a builder, for example, that has already passed the first four challenges, and this is like its profile No,. So you can see,, let's say, the feedback from each one of the challengers. So,. What's up? Well, I'm going to teach you a lot. Because here things get more complicated No,, it's not a test thing anymore,, but it's something good,.

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They are more advanced. Concepts. What happens that when you arrive, when I found out,, you will lose this and automatically you can be part of bilking or Beetle,. It does not depend on what Do you mean that this is the community that I am going to tell you about now, that it is the one that I am part of,.

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This is already for the people who have overcome Es Piedra Micirio VII. We are like a community of developers that what we do is create, above all, prototypes of products. tutorial content that enriches the ecosystem.

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We are a fairly anarchic organization. We do not have much structure, we meet every other Friday. We do not have meetings or anything, but each person works a little on what they want whenever it is, To contribute to the community no and whatever Well, something for the common good. We get together. Every two Fridays We do like the voltaire that we call him, Austin comes out with good c With. The bow tie here in Colombia I think they call it a bowtie, I think and well there.

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We teach the Bills that we are working on a bit and so on, and so it is a perfect community to continue learning, because you have people Well with the same interests. If you are interested suddenly a specific issue, No, well,. How are signatures made to achieve you with a service with a more goal? No,? Surely there is someone who has done something similar,, so you can fork,. You can see his example and Well, I'm leaving,, it's wonderful to be with a wheel Of, so many people who know so much, no,.

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This can sometimes seem like it's worth to me. And. These people. Don't eat how they earn money. How.

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Is it financed?, That's good., Thank, you very much to the foundation and to the builders that we already see that they have,? Let's say that they begin to contribute,, not to the ecosystem,. They put. What is called to a Stream This is a Stream that there are of different sizes. I am going to show you here. We have like all the builes right now that are with Stream I. Give you an example in my portfolio.

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You can see my estimate here, so it is an amount of ID that you can reach per month in exchange for your work, no,, and this work is not for any company,, but simply a prototyping job to come up with ideas and create repositories that are useful for people here, for example,. You can see things that I have created and we are also very transparent to the time to withdraw the money there. You can see the times that I have withdrawn money for what reason How long ago, And not and here, well,.

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That's the reason we didn't talk about. I have worked on. This curriculum is done this and so on. So well.

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You can also see the part of Bills here here is like Well, a huge list of the things we have done and sometimes well, that is, look, I am interested in the eneptis, well, you go here. You can see the things that have been done. You can enter the bui ld.

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The loogies are not my favorites Greetings to damu. Who is the creator of this an Argentinian and Well? Here you can go to the code in the repository, see how it is done. Inspired by this fork it and use it then Well. What I was saying is a very rich ecosystem for to learn and well. One I hope that, with this workshop, I hope that some of you will come out wanting to do. Spiderman and I. Don't know the community.

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We are waiting for you there behind the wall and well I have told you many things, I think it's good. If you have to keep one just stay with despiertamicirium there, you can go in and spin everything and well now. Well Thank you very much And. We have time for the question if you want I will also be here today and every day so that you can grab me and ask me things and nothing good. Thank you very much.