NEAR Whiteboard Series with NEAR | Technical Deep Dive Sessions, 7 Sep 2019

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From YouTube: Whiteboard Series with NEAR | Ep: 28 Jaynti Kanani from Matic

Description

Jaynti Kanani (https://twitter.com/_jdkanani) and CEO Alex Skidanov (https://twitter.com/AlexSkidanov) talk about Matic in the 28th episode of the Whiteboard Session. Matic is a layer two solution to help scale Ethereum using PoS side chains.

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The Whiteboard Series with NEAR is a set of video interviews with Founders who are building scalable solutions for Blockchain. We deep dive into their story, what they're developing and how it is helping the ecosystem.

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A

Hi everyone- this is Alice from here with me today, RJD and harvest from magic, and we will talk a little bit about the rear, two plasmas side chains. All things probably like introducing some guys and.

B

C

Name is Jessica I also go by a JD CEO at market research, so.

D

My name is, after that Emma and I work as a blockchain engineer at matok, so things like plasma and everything else. Oh so.

A

He is like introduces the overall design of the system.

C

So, first of all like we are.

C

User, mostly people see that tokens in a contract, so it's basically because it conduct routine everything all around the city and when you, when the users, basically deposit the contrast on the routine contract, it will appear like only on this action.

B

C

Is our side chain is basically, if you EVM, compatible and here20 any a 17-7 Pentagon contracts are basically plasma sick, so I will.

B

C

So this is like other chain which is EVM, not beautiful.

C

And whenever you are the focus here, the validators basically create your post it here. So basically, let's say if you was in tenth I yeah.

C

C

C

C

A

Take turns producing books. Oh yes, so.

C

Basically, this is like simple: we just use the gate.

C

C

Know it just take downs.

C

B

C

The probability of choosing it chosen by.

C

To become greater, you could use take wedding, is a medic over here, X cosine. We just call it like a state militia. Oh.

A

C

Stockings and I say something happens here: the code etcetera. You can start. Let's see, we need you.

C

Yeah I mean this is next simple: EVM.

C

Seconds SEC simple, because we know the comedian body yeah. Sometimes every.

C

Put the edge of the older box.

C

They would only take one.

A

And on this chain, the the four children is just whichever one is longest.

C

So here we have like kind of we, you know which flow will get by Mitch, which for wizard not so.

A

So the first producer created the Walker.

C

Here, yeah basically hh-hello like different singular. Yes, so if let's say.

C

After three balls, if this everyone will.

C

A

If you can, please to whichever one has higher difficulty.

A

A

C

Lee so basically.

A

Yes, so being this case skip the bore, and so that's going to be over yes,.

C

So you know so basically it's basically yesterday.

C

First created and then.

A

A

A

So so this is the.

A

A

I guess our question is: let's go to the details of how from the game changer they to the sanction, so let's say I'm looking ten by playing it smart conflict, they now, let's say that validators neighbor actually was my procedure.

C

C

A

A

A

A

A

Okay, and so what happens? Let's say it was at 10:30 right. Let's say they actually give it here here it is on the.

C

Other wise I mean so basically once you, you can't execute this gender, because what ready-made.

B

C

You can expend is, let's say: I find, is.

C

Because this one was before.

A

And so we, when a snapshot, they were cool right. So this for Carew has it has some rules of the council in some right and so how they can I can have a Myrtle.

A

A

A

C

Signature of the.

C

C

A

Know the sender.

A

So your sender is actor and all the days with your like the checkpoint after you submit and I, when you also sent them, they do right here and then we'll pretty much the same, both of them right now. So I'm, fine.

A

In the reverse situation, were you sending so your something wasn't right.

A

So this is C D D. This is the feeling blower right the same chain where you and your religious actor. You send me that you put something today as of this on the plasma chain.

A

D

A

Books pass and then the first ones actually made. Is you sent em to me? Imagine this in this long, you Sam and that I use to me and I talk with the train.

C

Yeah, okay, yeah.

D

So what I can explain? Okay,.

A

Okay, still recording and generally feel free to interrupt the flow I guess he told being in it later, so they were gonna. Remove everything cool you wanna jump in yeah.

D

So again, it is the spot, oh sure,.

C

Yeah you just point out your your projects include anything we can.

A

Get okay, so we start looking to feel more right on your block. Jd who's, a little slacker. It was its 100th day all right, so this is. This is the first walk with a welcome today appears on the plasma chain. So are these the other images so.

D

A

Moment it doesn't really matter so I'm back to here. So this is the last checkpoint. Everything.

B

Was going well here.

A

B

So this is the first time where people.

A

Start, you know yeah yeah, doing weird stuff, and so the first thing JD does is he sends in.

C

Crates of transaction.

B

A

To others, 10:00 a.m. and the probably understand all right, like whoever pays this blogger, like the blog, is, is fully valid and look at this book. I see this book exists and maybe come for more books. Yes, but what check that is not where the closest the checkpoint was going to be. You.

C

A

The future yeah right so I assume as a mother, Kate, might organs or mine there's a long chain here and then I give JD he's lucky he's paying for yes right, then after that, there's a new book right where it says the same time that I go to I must have a day. So he was right. So now they go.

A

And then they do the same change here and at the same time, sting.

B

A

So there's no book skipped all the scenes of the correct and then it's me doing this right and so I just sustained a huge loss. You have 100 day yeah.

B

D

So we go with this assumption that not just in the function we have designed it in such a way that we assume that there should be any folks in and if they were folks when we already disputed what they were. So what you do is you prove on the routine, so we have quantified death a little bit the means of its producing this Bluff. They sign this block.

D

So what happens is if, at the same height, two gloves had signatures from same diggers yeah, so you can go to the Ruchi and prove that and then in that way,.

A

They will be slashed right, but but will the slashed money be used to compensate for those money yeah, something like that so mix.

D

Of that are, we are still looking for that when the that's national.

B

Holidays yeah will.

D

Somehow use that to actually resurrect yeah.

B

A

See and emotionally.

C

If you ask me, you know, wait for after deposit for next shipment because you actually transfer like one or two in the economical security between the checkpoints put put deposit uses. We might wait a polite next checkpoint and then you can start everyone's putting here to consider I.

B

Said so so you can actually exceed with.

C

Your exams in flight, even when something goes wrong. Yeah.

B

A

B

Here is, if you just selling coffee, you.

D

Get wait for a block you know and if you're selling well I'm bargaining by Kazmir aperture project, malaria.

A

So let's say two scenarios write the book. This book is gonna, be the same, but the time is gonna be different. Cinema scenario. There's a book here where again malicious JG sends to me.

A

A

He was asked if minister and.

B

There's a second chain.

A

In which those people to exist, what are they mean? It was on this day, and so in this book he sends my in tune. Yourself are the same one.

B

A

Right and I mentioned two different scenarios right. One scenario is that almost up to the chip point, this is going to chain that exists. You know nobody can see this chain Yeah right and so for all I know. I have 100 yes right, because the Cibola channel exist. You know my needles out of them right this chain. Yes, that's nice and the second spin was nothing wrong plan. So, whichever one's one of the things clearly preferred approach, I don't know this one, yes right. So this is a balloon right right yeah.

A

So nobody gets much.

D

So until it seems so, these two blocks at the same rate. No. This is.

A

B

Fine, when it's.

A

C

Like so, this is this.

B

A

So this is kind five six.

C

It's a time, oh.

A

I see so so, if you so, let's say we're trading in a loop right, so you thought with the mean, so let's say you work at one, then everybody skips yeah I, see.

B

A

But that's due: let's skip the book. Okay, but I think if so, let's say, let's say: fear escape whoops on this chain and it's just me so, let's.

C

A

Someone is like what let's say: it's a little credit, so he probably produces this book.

A

You get don't produce anything right and then right before the check for in the table, you wake up and you're not taking this book right. So this is JD.

A

D

A

Nobody gets rushed because normally double sign right, but what your chain will have a higher priority and they'll move the day, and so you can stance with your chain and then that will spend right.

C

So basically, this is like this is six law, or this is the so.

A

The kites will be like. Let's say this is quite wild blue. They believe, then. This is four five six I know. This is the same. Sixteen.

A

Right absolutely in the Telex case, after this blog, he skips yourself gives a big Chris. His book stiff shoes gives her mid case he's going because you guys were just you know. While the court is your great to go straight right, but.

B

This chain exists.

C

It exists like multiple people can actually read a blog. However, they want, but as a user I will see. Okay, this is the this.

C

Is the yeah, but.

A

The timeline is the following right: some I see this I see this book. This is like the first five seconds of the book and then the e-book starts for the ten minutes of the e-book. This does not exist right, so this is how the e-book looks to me right before the chip as a user right and then and then at that moment, almost like the checkpoint is about to happen. You and I URI give this chain like it. Just not all those books, they're debugging, yeah,.

C

So basically, in that case, mostly, what happens is like, if user detects that multiple properties are creating multiple differently same high-tech, might exit and no transpose anybody in the system they actually it might happen in some cases. Let us say: let us say we tell this. This guy is like prevalent and college. Thank so in that case they said if they make a transition here, in that case, their certificate. This changes and go over the checkpoint. Oh no, you can actually how like in five transactions pointing out the previous one.

A

Finds time to trying is that so sort.

B

This has been so usually one.

C

A

This blog, this is only focus recovering.

C

Yeah, so basically, if, while sending like two transactions at the same point of time, this against anyone's I'm actually meeting here that I spent in any case, even if you can or not but.

A

You cannot be scratched because you know.

C

Yes, yes, yes, so, basically, in that case, most of the people will just start exiting before you will.

B

C

People are spending.

C

In the balking, so it's like.

A

74, this 100 bad right so.

C

Why this is something you did was signing away my trinkets, so so, basically one let's say when I make a 210 Dixon's either.

B

C

Chain this chain will be so now. Let's say if you are meaning the time. Let's say I, send you significant to you and now you have like see a signature. ah The other guy may not want to know except the openness cooperation with you.

C

So cockpit also knows: okay, hey he already won transactions and JD has like signature of the digital producer. So I might not accept this right, but.

A

They mentioned that. Imagine that the next ball, so the figure is not you mention person.

C

You are saying if our feet and I both held up it doesn't know if I was his signature of robbery. Certainly you.

A

So so, let's say that the next book, the book, a tight team he's supposed to produce my you right.

B

So you're not doing.

A

100 for each yeah right now agreed here, which sends to die. Do.

A

But this one, we don't show it to anyone. This book exists on your machine, but nowhere else and then and then because that will probably sees it italic who is validating here he's gives you he gets his own blog where he sees transaction fee also signed and poverty. It shows everyone the same 100 like me right so here it says to others, 100 lei, so after that, just without the continues moving the chain and then hope you do not do not give any moves to.

C

A

A bonus user of the system I can see it here. The transaction recently 100, I, right and I, don't see any other transactions, I, don't see any other books and it's been 10 minutes by now, almost 10 minutes, so I'm like ok, it's perfectly reliable and then right before the checkpoint. You reading this blog bushes are higher priority difficulty and immediately Isis from this book. Okay, in fact, right yeah, but my little challenging, because my teacher is.

C

Lover challenge because so basically how it works is that if you signers same statics and toes cinnamons, they can actually challenge the exit and the later one will. The order will mean right so 75 making connections in this find side seam in sign there to transactions. It is to second people what of them fish.

D

Yes of the make you disagree.

D

A

But but it will be like: why would why would a failure chain that hasn't just me if your block difficulties, fine, no, because it.

D

Depends on what was there.

A

Was not check check want you haven't, yet there is no there's no checkpoint. That's also saluting.

D

The exits, then you so there's a concept of left I can see patterns actually in.

C

Flight on it, so if there's no checkpoint, it's going in that context, but you should.

A

Name in Farsi community have two transactions which happen here: yeah.

D

So you can only referenced.

B

The deposit itself right, yes,.

A

Yeah so I reckons they take. Was it and you reference the deposit? How does this new choose? Who was supposed to get.

D

Yeah, so exits will be cute.

D

Whoever starts it first right and.

A

So in this case, if you start the places first, it was yeah I was not suspecting anything bad I wanted to keep my diet Department chain right, except and your militias likely immediately exit. So I lose my safety.

B

A

Center and and the comedian cooperate, I can lose. My money employ only.

C

Me play Lord yeah, so you know.

D

This and they were fools and they were on the check.

C

Yes, okay, see ya between the checkpoint. If you are making most of it on Jackson's.

A

C

A

Give the world a dissolute I can in principle, lose my money yeah.

A

So now, let's talk about Daisy yeah.

A

So so my understanding is that, when what is natural, this is natural to you effectively improved it in certain accounts, certain amount of money. Yes, so now how do I like what David? So what is the? What is the protocol? For instance, okay,.

B

A

A cent well Baker goes of challenges exist, so.

D

There are methods, okay, so my name is: venues are Mexican start exit with the positive two things, which was that you guys are members not my date on the side chain. Yeah.

B

D

That is what I know: exit exit.

B

D

Another one is exit with start exact with word Romans. So what happens here is this is the case feared automatic chain is Oliver and let's say you want to withdraw your time. You send up or deduction.

B

D

A function in our yeah securities.

B

D

Say I want to the 50-day.

B

D

When I'm touching is included, you give a proof of that transaction page this option and.

B

D

That both is so on magazine. These are the blocks and I'm mobile group consists of like no headers of these.

D

To this one, and then is blockheaded, let me like it, it has a transaction hash and that you moved and then early sea route and a couple more things like time. Stamina, so then, when you want to say that my goal, death actually was included, use a white thirty seed.

B

D

Give a little group of the fact that at the sea is a part of this.

B

D

Then you prove that is utilize in a block unit that was taken.

D

So this is the voltage and then the third one is moving the side exits, so that is when people are people have started to mass exit. The case would be when there are 66 percent creation. That is the only case that you use now. So we let's call this static.

D

So this one, you provided proof of one this one, you provide proof proof of reference, transaction and optionally and in fact it's it as well: infinite hands action as well. Yeah.

A

So, let's come in quite choose actions, you have to simply security and so.

C

Let's so, let's say we'll.

A

Just have a checkpoint and the only exit.

B

Something that was checked wanted.

A

Right so when they, when they provided proof of a bird transaction, I only provide the proof of inclusion. I don't provide the proof of the reference of the biggest resection yeah, your answers only for the worst right, okay. So, let's start with some examples, so let's say right and so yeah, okay. So this inclusion and.

A

A

And the other avenging it creates an exit.

A

Yes right so how'd the way challenge, so they think its.

D

Users looking for the first thing that it's a condition either the first point where the team yeah.

B

D

In our case, this was the time when the Jane, because he said it was able to load it. So what happens is let's say you are at a point where this is a malicious transaction or an invalid state. Now this.

D

So the idea is, you would as soon as you see this, you will stop hitting with transactions before it.

B

D

Then you wanna go something like this, where you say that another problem here is the priority great. When.

B

You exhibit itachi, you.

D

Give a sense of where that turn actually was in the sexy, and then that is the high priority according to how there is a sale process. So the lower the priority of before it was face was like a main priority could be here would be here could be here and because it's younger ID would be.

A

Lower so only acknowledge your transaction, so I say sending me above my yeah like.

B

A

Right when you start the transaction you this check for you and I have asked to the block.

D

D

D

D

A

A

A

A

D

B

D

D

So then these two are your inputs yeah, whatever like to your or the spiders balance being changed.

D

Because you really chose to be spent visualize, you take those located where JD's that it was, and yours was six.

A

B

A

A

Our you to six Donuts all right, and then they send them to someone else. Yes and I'm. A travel agent, six bookings when the children should be something that references. My expansions action.

D

A

D

D

D

B

A

Can I possibly has it so, let's say I have six, can they exit.

D

I guess, if you're doing the would be selected, it is only four paths: exits, yeah, so exit with everything that you make when you use this thing.

C

If you think, like everybody's career being on the section and.

A

Homicides, it's right to exit the transaction I need to sound something which intends to our ideas, which is on the order of life. Let's say it's like forty captures. Sixteen sixteen ashes. Sixteen has this issue. 16 hashes photo so.

C

Basically, currently we have sixteen sixteen, so it allows that actually allows those right.

B

C

The future increase I'm going to simply is me yeah, but we don't like. We currently have less than sixteen I guess.

A

Yeah, okay, so so so that means that everyone can have an up to sixty thousand transactions. People can have that up to six thousand box. Okay, stop sending I, guess.

B

You Purdue books every three seconds right and once it's.

A

All been going well for like a year for a year, nobody was being malicious and you have like your cumulative a lot of balances on the on the chain and then I come and they say I say: I'm, burning, 100, buckets, yeah I know everybody start sizing. So how like is just a mechanism which will be increasing the challenge period over the time so that everybody connects it.

C

So we are actually thinking, oh, we don't know like concepts for now. What do you think if, let's say the.

B

Balance increases and at some point of time let's say 50% of the deposit.

C

Like deposit exiting make things very short time, I move these strange, PDA terms of everything like extra time to exceed this like Miss, even if a basically this is the world pot. We are thinking on it the best soldier it's little bit complicated, because the plasma basically uses like only ones of budget point.

C

There are some trade-offs. We make security between the checkpoints, but most of the time it will work. If you have a small amount of money and you will be school.

C

Connections, but if you are like many huge Daleks just watching.

D

B

D

We are optimizing for the best case scenario, which is nothing goes wrong and we are, and we are, they are taking those trade-offs which, let's say, require you to use more gas in case of the worse exits. So better. You export cases when things are okay, mm-hmm a little bit Bolsheviks when things are not okay but which is okay, because that might happen this one. So that's why the normal one exits!

D

You just give us a receipt, yes, but will the starting gate which is like this is heavy, but that's okay, because this is the worst case, so we are making those trade-offs so.

A

When I sent the transaction to someone right so, let's say I received my arrested. 100 died long ago. Yes, right like year, no and for one year there was no malicious behavior on the chain. One year later, I won't! That's 180 is the expectation that you validated the entire chain range of this world or how to improve the other. They have 100 I like if I give you a transaction yeah right.

A

How do you know so so consider two different cases right one case is I actually do have 100 type injuries one year ago is nice and this one's actually gives me the book. I. Am you see and you have another user? You know about a taking the second.

C

Example, I do not.

A

Have 109 I send it to you, it gets included in the blog because one day, there's a malicious. You have no idea without breaking the chain, so expectation of accumulative the whole chain. Yeah.

D

The assumption users.

B

D

It's a big fan of that because, as we move forward we'll, we need to think about that.

B

D

Also, there are ways to circumvent it. Let's say they are properly incentivized watch starts will be validating the gene movie.

D

Probably thank users. We are also thinking about medicated exits. You could dress somewhere to exit on your day off.

B

D

Could be like a subscription thing fixing home so.

B

Some ideas and.

D

All that but yeah, that is the limitation yeah.

A

Yes, sir I guess like for small Obama I will just trust that nobody gonna.

C

Be just optimist: Lee optimistically, Jade, okay, after like 1/8 one year, my mentor is nothing wrong and if you are exceeding king might be like in constant yeah.

A

My particular example, the chain was in shape.

C

Startling last 7 days, John Dickson's, if you want, let's say if something was wrong. Last 7 days, you just know.

C

Otherwise, you just use that simple right before say what is in then.

D

The parts that need to be.

A

D

B

A

To all the challenges, so this transaction cannot be challenged. This game is buggy, no just move your.

D

A

A

A

A

For different people 71 days, I'm, saying gee, that's uncommon, you're, sending money six six day at some point, you some divine seven die and then I can include the proof of all of those and say: I have 13. So.

D

You simply say that I would wins if it's every night.

A

For this particular Church, yeah I'm.

D

Just saying I wasn't talking.

A

Like that, you just give that last one that in.

D

This would be this not that it's not oh, okay,.

A

So go ahead, but how so OSE, because the lower you're eating now that doesn't work pretty good, because imagine where.

A

Jg cents mean so, let's say drinking as one who died. He sends you fifty day here today.

A

In this world sends me.

A

Because I can't waste it and.

B

A

He exits, he provides the last of the large.

B

A

Provides distance are shown in cases for 100 day so.

D

He cannot wait this one. You will have to provide something order because he spent fifty. What are you you.

A

Guys all forgive us this, what you say all this is 130 and I, say 150 time.

D

So I can only exist, but.

A

In this case, how, if I want eyes at 13 different accents? No.

D

No, so how do book is after this transaction? No, your manners would be six.

D

A

There's no like something is that the bloke doesn't have a state route right, so if they do chemic math can invalidate the balance of a particular participant.

D

So what we do is in every time circle we have a particular event. We give a little off transfer.

B

D

What it does is it limits your previous balance before the transaction and the new rebels standards recipient and then save the and there's a.

A

Beer, what's like old palaces, New Balances, yes I see, so this think.

D

Of it, like a utensil, so here high balance.

D

And then, when this transaction is made yeah, so it says whatever you were six.

A

So I provide the last transaction 13 and because everybody validated the like everybody who cared sufficiently about large transfers rather than total blocks. Yes,.

B

A

Evaluated that this is also correct. Okay, yeah yeah.

D

That's it so anyone do star exiting you like the reference collection or ligand its own. Let's say you bought this and then you say.

A

And I see, and so and so the the way we can challenge this transaction. So so, let's say Mexican I'm saying I have 13, so we make an assumption that all the books are characters right. The locks are invalid and someone that people should not have acknowledged. They are money to begin with right but, let's say I said it all, but I'm trying to exit.

A

The only way, the only way the only challenge will be to find another transaction from from me. That spends any of us that you know yes, yeah yeah a came after this, which came after this. Yes,.

D

Yeah yeah that makes sense to meet you and spending it on the site. You know so then you come in and prove this thing.

B

D

Has a higher priority then thank.

A

You guys for coming any any loss announcements you want to make an automatic, no.

C

I mean we are actually launching a state kind of solution like people this take on attachment and play with the I become a very enough with the whole architecture.