Qu'est-ce que la Blockchain

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• 38:13 TLDR Consensus algorithms Pedro Lucas Okay, so that all this is in the consensus algorithm of Cardano and there's similar things in Bitcoin, but for Cardano our consensus protocol is called. Actually, I'm not sure if I have it here. Yeah, I should have written it here. Maybe I'll use This bet here that says on Cardano, proof of stake. T bitcoin · consensus · proof of stake
• 27:01 Discussion Blockchain nodes and Cardano stake pools Pedro Lucas Okay. I think this is on Cardano. On. Bitcoin and consensus algorithm. Okay. I had a feeling that this would work nicely. It's just putting like a final dot in the end of all the sentences,. Like if it was a sentence. But it's still quite practical. bitcoin · block · blockchain · consensus · proof of stake
• 33:35 TLDR Consensus algorithms Pedro Lucas Because in the end no one can say I trust this other guy and I know his block is good. People just need to look at the material, look at the block data and say this is valid or it's not valid. Okay, Especially like on Bitcoin, there's the proof of work, on Cardano there's proof of stake. Let's talk bitcoin · block · consensus · proof of stake · trust
• 51:44 TLDR Proof of work, hashing, and Bitcoin mining Pedro Lucas The benefits of having an algorithm or a consensus algorithm that's this simple compared to Cardano is that this has nothing to do with how much bitcoin you own. Actually, a miner almost like literally doesn't need to own any bitcoin. All they need to have is an address. If you think of it, you can bitcoin · block · blockchain · consensus · hash
• 56:38 Approfondi Proof of work, hashing, and Bitcoin mining Pedro Lucas Okay, so this is a nice graphic. Let me just open it in a new tab. You see, the line is like jumping up and down because it's not instant, it just recalculates every, I think, four weeks or something like that. And it's only the difficulty to mine bitcoin, which is basically how many zeros do I need bitcoin · block · hash
• 12:50 Concepts Curriculum progression Pedro Lucas What is a wallet app? What is a transaction? What is a blockchain in terms of being a database of transactions? And we also saw what is the network of the blockchain? So all the computers that are running the chain and these computers are. Sorry, I need to maybe start dropping. This on our screen. A block · blockchain · what is a blockchain
• 23:31 Discussion Blockchain nodes and Cardano stake pools Pedro Lucas Maybe write it in the chat or. Yeah, thank you. Okay. Why are two relays required of the spo? Well, the simple reason is like in computer science or in computers overall, we always need backups, right? So imagine I'm not a specialist of this technical area, but, you know, you're running a stake pool block · trust
• 1:08:30 Approfondi Proof of work, hashing, and Bitcoin mining Pedro Lucas Okay. So if I give you the fingerprint, which in our case is this ugly number, there's no way you can get this back. So anyone that if I now gave you this screenshot, which could be like a block, you know, in the end, when you submit a block to the chain, you're submitting the whole thing. You're su block · hash · trust
• 49:13 Discussion Proof of work, hashing, and Bitcoin mining Pedro Lucas So the probability, if I am scribbling here and changing my scribble of getting a hash that starts with a 0 is 1 in 16. It's already a bit hard. Right. And this. Oh, now I have two zeros, which is even rarer. Right. So proof of work is really just this. You know, this SHA. SHA253 function is what ev bitcoin · block · hash
• 1:05:49 Discussion Proof of work, hashing, and Bitcoin mining Pedro Lucas Okay. One thing we did in this course for Bitcoin that I did was that every learner was trying to do their own hashing. And eventually when they found a number that generated a hash that started with zeros, they were sharing not the result, but this formula. So this little thing, the omg aop, this i bitcoin · block · hash
• 17:25 Concepts Blockchain nodes and Cardano stake pools Pedro Lucas Well, they must have some reason for running a node, right? So it's a good question. If we focus on the data data aspect of it, they could be indexing the blockchain to provide API data to apps, you know, so that could be a reason. Maestro Block, Frost, Dandelion, you've heard of these, right? This block · blockchain
• 44:27 Discussion Proof of work, hashing, and Bitcoin mining Pedro Lucas Hash function is a programming tool that creates a fingerprint of the data. The data goes in, function is calculated, and the fingerprint comes out. Okay. It takes an amount of data, scrambles it, and returns a short and unique result for that data. And by the way, I'm talking about hashing function bitcoin · hash
• 1:03:15 Concepts Proof of work, hashing, and Bitcoin mining Pedro Lucas Okay, so it's really just proof of effort. And if you think of it, it is a way of anti spam as well. So here we were like in Cardano we have these ADA titles of ownership of something on Cardano that no one else has in the world. And that makes us trust each other because we have ada and you also ha bitcoin · trust
• 1:24:31 Discussion ADA, policy IDs, tokens, and UTXOs Pedro Lucas I just made a mistake. What I wanted to get from here. Is like, how can I take this transaction to the other block Explorer? I'm going to need the transaction id, right? So this whole page is a transaction and it starts with the transaction. You see this word? Does this word make more sense now that block · hash

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• 50:22 TLDR Consensus algorithms and proof of work Pedro Lucas Proof of something at play to win or lose or that gives you some interest in that Cardano survives and is healthy. Okay, so actually I left the scheduling part for the proof of stake bit because on proof of work that's not so valid. Proof of work can be described as proof of effort. And so the machi bitcoin · block · blockchain · consensus · ledger · proof of stake
• 57:27 Discussion Consensus algorithms and proof of work Amiar (gekkido) You didn't lose your look as. But I did study the consensus algorithms for some months in detail. And I would. There's things I would like to argue, but in a different. Maybe in a different context, like which is the best algorithm of consensus, etc. bitcoin · block · consensus · hash
• 39:00 Concepts Blocks, blockchain, nodes, and stake pools Pedro Lucas So we're going to go straight from the simple thing that you touch on all the way to what happens in the blockchain, what are the block producers and all that thing including the consensus algorithm. So let's fly over this. I just had to fill in these three gaps here. So yeah, so now this, the block block · blockchain · consensus
• 0:30 Discussion Introductions and participant interests Priyansh Rai Then I switched like I started loving the concept of the blockchain and bitcoin and in that I have also learned some technical things about Web 3.0 and then I came to Cardano and here I find that there is less awareness in this chain currently. But this. All these communities and these people. Yep. bitcoin · blockchain
• 28:53 TLDR Wallets, keys, addresses, and transactions Pedro Lucas This is what give people what you give people so they can pay you. Sharing it is harmless and the worst cost you is a little privacy because as you've seen in the Cardano blockchain, anyone that has your address can inspect what you have in your wallet and move back in your movements even in time. S blockchain · ledger
• 43:14 Discussion Blocks, blockchain, nodes, and stake pools Pedro Lucas One thing interesting is that each stake pool needs to have one machine that's a block producer and two other nodes that are working in teams with the block producer, just to echo the information around again so that the network is more resilient, more resistant to, you know, one of them being down. block · trust

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• 1:08:41 Discussion Decentralization and supporting resources Pedro Lucas No, I think for example, on Cardano I don't understand it fully, but there's a computation layer and a storage layer and those all work in parallel. So I think maybe on Ethereum it's different machines. So that's why it's different nodes. There's an execution node or consensus node. bitcoin · consensus · hash
• 10:17 Concepts Session context and course follow-up Pedro Lucas So another thing, speaking of tooling that I can share, I'm just going to reduce it a bit further. If I do control Alt B, I have this collapsible structure here, which is really cool as well. So I'm really getting used to using Markdown for a Lot of stuff. I think I have one in my club. Kip or clipb block · blockchain · consensus
• 52:25 Concepts Blockchain structure and data providers Pedro Lucas Yeah. So then for example, there's pruned and packed historical snapshots that are shared around in this Mitral protocol. And those can be as small as 135, 150 gigabytes before expanding on your drive. Yeah, so just it varies a bit what the size of the blockchain is, but in its natural binary state bitcoin · block · blockchain
• 47:20 TLDR Blockchain structure and data providers Pedro Lucas Now the blockchain. For so far, we've only seen a couple of very, very simple things. Wallet, wallet, app and a transaction. So what happens with all these transactions with these checks that were signed? They get added to a ledger where the transactions are attached, grouped into, let's say, pages, block · blockchain · ledger
• 57:37 TLDR Blockchain networks and block production Pedro Lucas Okay. Network. So usually people conflate what the blockchain is and the network of machines running the block, the blockchain. So the ledger and like storage of pages of transactions, that's a file that's copied across a number of machines and these machines compose the network for the blockchain c block · blockchain · ledger
• 1:13:15 TLDR Learning progression and meeting close Pedro Lucas That book of transactions, and how they produce those blocks or pages and how they get along between each other, which is this the consensus algorithm. So I think if you start understanding all those concepts, you basically have a vertical understanding of everything from the basic user of a wallet consensus
• 43:44 Discussion Transactions, signatures, and fees Pedro Lucas It's basically a byte. I think it's. Yeah, it's probably some technical variation of a byte on the blockchain in terms of how they measure things. And this chart is really cool because if you zoom it out a lot, you can see like the bull runs and. And some kind of. Whenever there's hype around bitcoi bitcoin · blockchain
• 1:01:12 TLDR Blockchain networks and block production Pedro Lucas Okay. So I think this probably is a link that I had on my notes, but we're running a bit out of time for today, so just going to fly over it. And yeah, so here we have the block producers, which were like the difference between a relay and a stake pool operator is that the stake pool operator is pro block · blockchain

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• 14:34 Concepts Testnet Wallet and Transaction Demonstration Pedro Lucas So if I opened this again, if we go back to our stickies, the third sticky that I have here besides doing some transactions is Block Explorers. So what is this thing? Block Explorer. If we go to Google and just say Cardano Block Explorer and I think I mentioned on the last session that the blockchai bitcoin · block · blockchain · hash
• 39:29 TLDR Self-Custody and Wallet Security Pedro Lucas What happened, for example, recently is, is that I did do the transaction to Binance or to an alternative to Binance, and they just said, oh, we're too busy now, we can't really process your deposits. And I was left like, okay, so you're the bridge between the blockchain and my traditional bank. And bitcoin · block · blockchain
• 29:50 Concepts Cardano Assets and Token Caution Pedro Lucas So the main coin on Cardano, the one that I can trust, was issued by the chain itself. You know, these ones on the small, on the, on the bottom part, these were created by people. And anyone can create any token on the Cardano blockchain. But this one ADA is the coin that I know the blockchain is is blockchain · trust
• 36:44 TLDR Self-Custody and Wallet Security Pedro Lucas Why do we call this kind of wallets self custody? And the reason is that we have this, which is what we've been talking about, which is pure blockchain working. It's just our device communicating with this blue cloud, which is a blockchain. And the only things that circulate here are bitcoin, ada et bitcoin · blockchain
• 52:36 Discussion Cardano Applications and Learning Resources Pedro Lucas ADA allows you. Let me just add a note here. Yo, this is really big with ada. You can decide who produces blocks for the chain for the blockchain. And that's what you do when you are staking your ada. You're saying, I trust this person to produce blocks. Staking is saying I trust this person to prod blockchain · trust
• 57:44 TLDR Mainnet, Staking, and Bitcoin Wallets Pedro Lucas Chichi was asking Vesper for now only communicates with the Cardano blockchain and I wanted you to try something from this side because unlike Vesper where Vesper you see all the tokens and all those little things. Bitcoin is uninteresting to the point that you just see I have this amount and this i bitcoin · blockchain
• 1:07:05 Approfondi Practice and Learner Questions Chinyere Uchendu Okay so okay, sorry, I have a question. Right so now right? Just like we have bitcoin, we have either right? And both of them can perform the same thing like similar things but just they are on different. What's the, the word? Blockchain. Exactly. bitcoin · blockchain
• 1:09:02 Concepts Practice and Learner Questions Pedro Lucas And that's it. So it's the network that pays them. And here it's also the network that pays them, but we call them block producers get rewarded by the Cardano blockchain for producing blocks on behalf of ADA holders. block · blockchain

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• 13:20 TLDR UTXO Model Explained Pedro Lucas And so what we're talking about, when we talk about proof of work, we're talking about how do these machines compete and decide like what's the score to see who gets to produce the next block on Cardano that happens because having ADA gives you legitimacy, gives you the right to produce blocks. Okay bitcoin · block · consensus · hash · proof of stake
• 44:27 TLDR Transaction Submission Flow Pedro Lucas But just keep in mind that when the applications decide on moving something in the blockchain, there needs to be a signature on a transaction and it needs to be routed either through the mobile app to the back end app to the data provider or, I don't know, some kind of way of submitting that transac block · blockchain · proof of stake
• 1:14:03 Concepts Oracle Function Explained Pedro Lucas So we need to trust these entities to throw in as metadata or as something into transactions so that the information of how much rain did it have, that did we have in certain location to come onto the blockchain. And then I can trust that the smart contract is going to look at that information, it's blockchain · trust

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• 1:32:10 Concepts Grant Thornton, Reeve and blockchain-based financial reporting Pedro Lucas Sorry. So securing Toast Trust in financial reporting. This is what the other showcase was talking about. This is what they do. And so this is a product to deliver verifiable and immutable insights on the Cardano blockchain. So verifiable and immutable is the kind of properties that are provided by blockchain · immutable · trust
• 1:34:48 TLDR Grant Thornton, Reeve and blockchain-based financial reporting Pedro Lucas When we look, for example, at edi, which is a decentralization, decentralization index that was Produced by Edinburgh. It has some ties with Cardano. So, yeah, there's that caveat. But I think the. The scientific work they did speaks for itself. Stands on its own, I think is the expression. When you blockchain · immutable
• 33:28 Discussion Wallets, networks and blockchain fundamentals Pedro Lucas So now you've covered that and you don't have any questions about like sending and receiving and seeing the history. Did you understand the part about the block explorer? Yeah, yeah, that makes sense. Right? Because you know, blockchain is a cloud of information. Anyone can access it from. From diff block · blockchain
• 39:08 TLDR Wallets, networks and blockchain fundamentals Pedro Lucas I also invited, I'm just going through my notes. I also invited your colleagues to install this other wallet which is not Cardano, it's Bitcoin. But it's just to give you already some cross chain understanding and understanding that there are different apps that communicate with different networks f bitcoin · blockchain
• 1:39:34 Concepts Grant Thornton, Reeve and blockchain-based financial reporting Pedro Lucas It has a fingerprint which is a hash. And then if I scroll down, I see some tabs here we see the inputs and outputs that we saw on the previous sessions with me, these don't really matter for this transaction because what we want to look at is the metadata. And if you see here, you see Cardano Found blockchain · hash

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• 38:15 TLDR Cardano Blockchain Operation and Delegation Explained Pedro Lucas So, running the chain, I feel like we've spoken enough about how there's 45 billion ADA or we are trending to 45 billion ADA. There's currently 30, 37 in circulation around that. It's growing. Literally every five days we get, we release a bit more in rewards to stake pools and to delegators. And wh bitcoin · block · blockchain · proof of stake
• 31:29 TLDR Gimbal Labs Updates and Workshop Collaboration Pedro Lucas To do just to give you some feedback today. This is what's been in 45B IO Web3 for a long time and I feel like what we've done for two 20 sessions. I think today's 21st I think was mostly play around with these first four topics. So over conceptually like what is blockchain and what IS tokens and NF blockchain · what is blockchain

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• 59:59 Concepts Staking and Running Cardano Pedro Lucas As we've seen when we went through the concepts, a consensus algorithm is something that's very important to be healthy in the ecosystem. And so we need good decisions being made to select the people that are producing the blocks. So these people, we call them stake pool operators. Like I said, they block · consensus · trust
• 1:04:15 Discussion Staking and Running Cardano Pedro Lucas You want to measure how many votes are in, how many votes aren't. And that's like in that transition between one epoch to the other. This one here, for example, is a parameter change. So there is a variable on the heart of the blockchain being respected by every block producer that says this variabl bitcoin · block · blockchain
• 21:30 TLDR Cardano Governance Pedro Lucas Not just a holder. But since I have uncovered the governance, let's have a quick look at what we have so far. So because we're not Bitcoin, because we are a system, a blockchain system with sort of a brain, a public governance system, and because we have a treasury with billions of ADA that need to bitcoin · blockchain
• 44:38 TLDR Community, Constitution, and Participation Pedro Lucas There must be block explorers that have the list of maybe here. Yeah, but the thing with NewRepTalk is that it's all discussions. Like each of these things is a thread, and you can respond to the idea being created, being presented. So it's a bit like a forum or something. I'm going to make a note t block · blockchain

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• 12:14 TLDR Cardano X Platform and Self Custody Concepts Pedro Lucas But the Difference is that they are able to have entries in their databases that are denominated in Bitcoin and ada. And also the same kind of thing about the logging in. So the only difference between these is that you can move money to this side and here you can ask to trade it a balance that you bitcoin · blockchain · ledger
• 1:11:09 TLDR Next Steps and Homework Pedro Lucas Okay. Any homework? I think the, the main thing is really like if you dig up in your, in the back of your mind what jargon you've been like working towards this thing, prioritizing topics for concepts so that we start seeing, okay, what is actually the blockchain, what is the transaction, how things blockchain · proof of stake

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• 1:20:56 TLDR Namespaces and decentralised identity Pedro Lucas Okay. So you see, decentralized name service, DNS, marketplace powered by Cardano and handshake blockchains. Handshake blockchains is actually a project that I saw Chris presenting or this whole project that I have on screen. Chris, when he presented it, he mentioned that this concept of handshake b bitcoin · blockchain
• 22:04 Concepts Indian Web3 ecosystem and regulation Pedro Lucas And so all we can do is adopt things like Bitcoin and ADA and gold so that overall, you know. So it's basically, for me, maybe I am biased, but it comes down to education and to changing mindsets where if people have something to save, instead of saving it in dollars or putting it in a bank because bitcoin · blockchain
• 1:27:07 Concepts Game moves, scaling and future sessions Pedro Lucas That depends on if you want to use the main chain. Like I said, the only thing the blockchain does is store data, query data, write data, right? But this, like submitting a block is going to take you it's 20 seconds each block, and it takes like a few blocks to consider it confirmed. So your transac block · blockchain

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• 12:57 TLDR Token Transparency And Lovelace Pedro Lucas I'm not sure what asset this is,. But. It's probably all assets. Let's have a look at this one, for example. It's a project that I think is just winding down now on Cardano. So I'm just developing from here that this ID is the key to a type of token on the blockchain. And if you put that kind of ID block · blockchain
• 26:01 Concepts X402 Payment Requests Pedro Lucas So instead of using the main Cardano blockchain, we use this current account between people for payments. Basically. It's what I think Adam was demonstrating there. Not sure if this means no when. You say lightning, but lightning is something that's usually native to Bitcoin. So that's why I was loo bitcoin · blockchain
• 42:57 Discussion User And Business Benefits Pedro Lucas So if we look at the previous sessions, were talking about what's the difference of having your money on the blockchain or on Binance or on a bank. We were looking at the directories of apps and saying, let's go use Book IO. I was demoing how to use Book IO. We were talking about Cardano versus Bitc bitcoin · blockchain
• 56:26 Concepts Minting And Evolving Assets Pedro Lucas Price bet. Bet on a price settled by an oracle. We've spoken about what oracles are, right? So oracles are something that's feeding real world information, like the result of a football match, you know, published by the football association. So you can trust the football association to publish the r blockchain · trust

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• 9:47 Concepts Blockchain Fundamentals Pedro Lucas Yeah, here. So this link, it's a cryptography hash function that basically it's a hash function. And so I documented a bit more like, what is a hash function? You give it some data, it processes it and give you a fingerprint. And so we did this exercise of, for example, with the hash function widget bitcoin · block · blockchain · hash · proof of stake

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• 13:43 TLDR Opening, Orientation and Participant Check-in Pedro Lucas So the first exercise we do in our sessions is putting ourselves in the perspective of people that never really heard about anything. And 45B usually focuses on real world use cases, not crypto necessarily. So we have this little diagram on a high level that we use to explain to people that crypto i bitcoin · blockchain
• 21:56 TLDR Web3, Web2 and Real-World Use Cases Pedro Lucas So we at 45B, we usually almost start with this kind of illustration of how based on bitcoin we got blockchain. And then out of this there's a number of things that are written on blockchains, but they are very different. So my question is, do you think there's a lot of things missing from here? Or bitcoin · blockchain
• 42:32 TLDR Money, Bitcoin and Digital Materials Pedro Lucas So I'm just putting in perspective when were talking about scams and crypto and all that sometimes there are similarities between fiat currency and scam coins. I'm not going to go over this too much, but I just wanted touch a bit on this difference. Let's just finish this part. So acceptability is s bitcoin · blockchain

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• 25:43 Concepts Web3 architecture: data, logic and application layers Pedro Lucas It's only when these blockchain nodes start sharing with each other that there's this new signed check by you that your transaction becomes persistent in a block and that block eventually is attached to the blockchain forever. Guys, this was a very long rant. I really want some feedback. Is this all block · blockchain
• 38:42 Discussion Web3 components, oracles and value creation Tevo Kask Haven't needed to think about this. A few months ago I had a dinner and I was asked, okay, so what good does blockchain do that we. Cannot have right now? And it was a energy company and said like, well, I don't know, actually. I think, I guess there is nothing. You can, you can't do that blockchain blockchain · trust

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• 14:07 Concepts Stage 3 Project Ideation and Updates Pedro Lucas So don't mind me when I hesitate back and forth to paste some things so, yeah, so I was suggesting, like picking up these kinds of devices that Fola is used to working on, that a nice project would be to create an equivalent for Cardano of what block clock does on Bitcoin. So Cardano Block clock is bitcoin · block

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• 1:02:20 Concepts Learning model and technical concepts Pedro Lucas So what we compromise is having data providers, for example, and you've heard of Block Frost, of Maestro or koios or Dandelion. These are software as a service providers for data because they chew up the blockchain is, I don't know, 500 gigabytes of information, but it's very compacted, it's Very bi block · blockchain