I don’t know what you mean by that. Blockchain can’t be modified or deleted, its append only.
You’re an inspiration. I personally believe that the system you use is highly effective and engaging to use.
1 Like
greate course 
1 Like
Thank You Ivan for your video lectures and the time & effort you put into this, it’s much appreciated.
In my estimation they are concise and potent with just the right amount of information for the student to grasp the concept and understand topics of crypto material.
I’m extremely grateful to have this opportunity to study this digital world with all its content.
I have at this time a Trezor wallet T with portfolio of 70/30 % of BTC/XRP and I watch the crypto market do it’s dance. At times I feel that BTC is here to save humanity, at the least I hope so. Then again its just me being naive/or not? I want to learn more every waking moment and I need to understand the graph that is displayed more in detail. Im open to guidance in this digital field because I know that I don’t know. Much Love & Respects to all 
1 Like
Hello folks!
I am interested , what kind of online jobs someone can try to find in this blockchain industry? I am 46 with some global understanding knowledge of programming, i speak Croatian, Spanish, Italian and English? Does my knowledge of languages have some value in blockchain industry? By the way , already playing on Binance ,trying to understand trading.
1 Like
There are all kinds of stuff you could do, development is the most obvious one. If you study languages I have noticed a lot of projects that were looking for translators for example, you can also apply as a community manager, law advisor, economist.
It depends on your skill set and what you want to do in particular. There have been job posting on the forum before. You can open a new topic in the Watercooler and have a discussion there. 
3 Likes
great first lessons. some review and a few nuggets!
2 Likes
Hmmm. I don’t understand how blockchain’s finality solves a problem like an incomplete vendor/customer transaction. Say, for example, a customer commits a non-reversible payment for a product and it’s not received. By chance or deliberately doesn’t matter. That sounds like early-days internet where a scamming vendor can be a predator. Say we hold the payment in trust. Does that sound like today? But now a scamming customer has the edge. How does one resolve these problems by an algorithm? Finality sounds more like a simple fact rather than a benefit. Today we trust a central authority like VISA. Tomorrow it sounds like we will have to trust someone. In this case, possibly an unknown customer or an unknown vendor.
Really enjoying this course so far. Ivan has a real knack for explaining things very detailed, but in a way that is accessible and digestible. I’m learning so much, and I’ve only just started.
I’m really excited for what blockchain can do for the world, and what i’ve learnt so far is great.
I am all in on this technology, I wan’t to be a part of this world, and to help build it (the future is here!).
blockchain.Ronin
2 Likes
Finality simply means that once a tx is done it can’t be reversed. There is no such thing as an incomplete transaction.
This works great for digital products since once you make a tx you will get the product as soon as you pay it. Physical goods are more complicated, some online shops offer a features like escrows where they hold the funds from the vendor until the customer receives a product and only then release them.
1 Like
Thanks Alko89, I wonder how the escrow will evolve over time. It’s one of the roles VISA, Amazon, eBay, etc., holds today.
What I didn’t get is when your company uses a blockchain for tracking the supply chain, what prevents you from fraud, when is cheating with hin entry on the blockchain. Is it really milk or is it half water half milk?
1 Like
Finality is a good protection for vendors. They are 100% sure they have the money to ship the product etcetera. If a vendor gets payed with Visa, the buyer can always call the bank to stop the transaction while the goods are already shipped. So no charge-backs is a good thing. If you really need your money back because of some honest reasons, the vendor can pay the customer back with another immutable final transaction where you can proof it on the blockchain that this particular transaction happened without the need of a middle man you need to trust.
Of course, it doesn’t protect a buyer to pay money to a shady entity. You can only proof that a transaction is settled to a certain address.
I think it is very difficult or even impossible to make a false entry to begin with. Every entry has to be verified by the decentralized network. If the participants see that it is a false entry, they won’t find consensus and won’t include it in the block.
I knew nothing about anything related to blockchain and cryptocurrencies until recently. Im more and more intrigued as I delve into this course and this world of blockchain. There is so much to learn and its so fascinating. It seems so simple yet so intricate and to think about it on a global scale in every industry, not just in currency alone, is mind blowing. Mass adoption seems inevitable but also quite a lengthy process. I can already imagine some industries where blockchain would benefit them greatly and streamline the process, especially in recent events as most of you have probably thought about too.
Hi Vanessa,
but for example: Selling milk in bottles. (1) Glas producer delivers glas to (2) company which produces bottles. (3) Company which fills the bolts with milk. (4) “Milchbauer” and (5) Company selling milk
2 can verify 1
3 can verify 1 and 2
5 can verify 3 , 2 and 1
But… 3 can not verify 4, because he doesn’t know the difference between milk and water.
So (5) trusts the blockchain and has a problem…
What you think?
1 Like
Hey Anton,
I understand where you’re struggeling, but have no answer to that to be honest. Maybe another academy member can help us out 
?
I’m not to familiar with projects that tackle supply chain management but there are a lot of projects that do.
One of them being OriginTrail. Maybe it would be a good idea to step into contact with them and ask them how they solve this issues
2 Likes
So I guess you have also trust someone when using blockchain.
1 Like
@Alko89 nice idea!
Supply chains are not my main interest, but @LittleAnton if you get in touch with OriginTrail please share here! There should be a solution I hope, as blockchain isn’t about trusting people, there should be a “trustless” solution and I’m very interested how they solved this issue!