Filecoin Hackathon Presentations, 5 May 2023

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From YouTube: Lighthouse - Perpetual storage on Filecoin - Nandit Mehra & Ravish Sharma - FVM Dataverse Hackathon

Description

Lighthouse - Perpetual storage on Filecoin presented by Nandit Mehra & Ravish Sharma at the FVM Dataverse Hackathon Kickoff 2023.

A

There we go well, we've got you up at the bottom of the screen and when you're your screen's ready, we can bring that up. So hey how you doing.

B

Yeah I'm doing good so glad to be here among you all. Builders.

A

Yeah I didn't know if we were gonna, have you named it or whether you're gonna have your colleague yeah.

B

So both of us will be here today, I'll be going through a presentation and then ravish will be showing the demo the Live code demo. So we thought.

A

B

We both love talking to builders, so yeah, that's the plan for today.

A

Cool okay, so uh yeah, we'll we'll see how that goes. The way this is set up. We've kind of I've only got this setup for having one guest on so we might have to uh when he comes on uh it might kind of boot you off, um but.

B

A

See how it goes, um but anyway, uh yeah good, see you and it and uh yeah take it away.

B

Cool awesome, um yeah, I'm gonna share my screen. Now. Oh yeah I think you should be able to see my skin right. Yep.

A

B

Cool awesome uh welcome everyone, I am nanded and I'm the founder of Lighthouse at Lighthouse, we're building, Perpetual storage on filecoin, and what does that mean? So Perpetual storage refers to storing your data long term, but just one time free, so that you need not as a client pay again and again and maintain your deals and usually the file coin. Deals on average are uh have to be renewed every six to eighteen months, so they are not so permanent.

B

Although the proofs are permanent on chain and we believe uh with the concept of ownership and web 3, the file coin storage should be permanent and that's what we are building here at lighthouse.

B

So underlying here. It's an interesting model that we call as growth endowment pool, and you can imagine it like deployed on multiple chains or smart contracts with fileco and virtual machine as the core chain uh in between and what happens is when you pay for a file at Lighthouse. Some portion of it is taken and made storage deals with me.

B

Various miners on the filecon network and the remaining portion goes to this uh smart contract based endowment pool, which is essentially meant to be governed by a down mechanism and lend to various D5 protocols, to increase the pole size and maintain uh the perpetuity of your files, so that the clients need not pay again and again or follow files. So this is the underlying mechanism underlying Lighthouse uh to maintain long-term storage of files and for the developers we have four products in our suit.

B

First is Lighthouse files which I'll demo today, which is like this easy to use interface, uh built on our own SDK, that you can use to upload files encrypt and share across to any user that you want, and the second is our Lighthouse SDK, which is this JavaScript based npm package that you can integrate either in your front-end rear, JS or in backend node.js.

B

This is what my colleague ravish will demo today and the third one is Lighthouse CLI, which is again a very convenient tool for developers to not just upload files, encrypt files, but also you can prepare your files. We just made that update update this morning.

B

So before making your file coin deals, uh you can prepare your files through this Lighthouse CLI as well, and fourth is our Lighthouse coverage, which is uh this encryption and access control, SDK that can be used to store private data and build token gated applications, and there are a lot of use case possible with Lighthouse. As you give like.

B

We are already saying uh some great examples with data dials, so just to give an example like SP and Dao is building this credit score of datadaw and they are using Lighthouse, not just for storage but also for Access Control. An application like matter.

B

Work is used in Lighthouse how something like WhatsApp uses, Google drive to store all their chat, images and data and like to encrypt them as well, and then we saw ocean protocol, they have integrated to Lighthouse for the decentralized back-end service and essentially, if you are building on Ocean, storing data nfts and like building excess control, Logics around that you can use Lighthouse directly through ocean protocol as well right now. It's live and V1 Sonic file live peer, demonstrating couple of applications on filecoin using Lighthouse.

B

So we believe, like they're, like a lot of plethora of applications, that developers can build you, ranging from data dials to token gated applications. Perpetual storage is our core proposition and something like file. Market is using Lighthouse for storage of their nft collection, and then you can even backup your personal data as well.

B

So some of the more concrete use case that I would love to discuss is one is okay contract and this is a team who have built the School nft widgets that you can embed into any website front end without writing a single line of code and have a nft minting functionality.

B

Now the cool thing, what okay contract team did is that every okay contract uh user has their own Lighthouse account so imagine like, rather than everyone's uh data of okay contract user being tied to their single API key, or they have done very special thing with Lighthouse, where every okay contract user gets their own Lighthouse account and in turn, guarantees that, even if someday okay contract is a platform go away or we still have the data in their users hands and again, as I highlighted with ocean protocol.

B

um If you are using ocean as a user, they have already integrated to Lighthouse to store data on filecoin as well, and this is something we are seeing a very interesting application and we love even like some somebody would love to uh you know, play around with it and build a data availability service, so we saw with ciscoin they are now storing their.

B

uh So it's like work in progress, uh so they will be soon storing their ZK roller proof, data on a lighthouse and the key thing is rather than storing all this uh big ZK proofs on chain.

B

They identified that, oh rather than uh bended on chain, let's store it on file coin using Lighthouse and then, as that happens, you can imagine uh building uh this bridge from any uh like chain, starting with, let's say the ZK roll up stains, but then with other chains as well and back up all the state chain, data on Lighthouse, and maybe somebody we might be interested in this hack it on to build a data availability service will or your token get all this chain data uh stored on Lighthouse and then there could be like some fee for a third party to access that data as well so I'll demo.

B

The first uh interface that we have here, which is Lighthouse files and the URL here uh for that as files.lighthouse dot storage. So yeah, let's head out to that directly.

B

So this is our website and uh to find Lighthouse files. You can click here on this login option and um you can log in through whichever login method that you prefer be it email, Google, GitHub, metamask or any other wallet as well and yeah so I just signed in for my wallet and I'm able to login into it and to upload a new file.

B

um Let me select this sample image file. The file is uploaded, it's uploaded very quickly and.

A

Just a second we're not saying I, think you're, just sharing your presentation window so.

B

I think that's not.

A

Sharing sharing your yeah there we go. That's that's better yeah cool.

B

Cool, so this is our Lighthouse files. So sorry for that, I thought I was already on this chat, so it's files.lighthouse.storage and you can log in into it uh through your meta, mask which I just did right now, but even through your Google and GitHub login methods as well and um I can like upload a new file here and we support like most file types. You can upload images, videos, csvs any kind of file types here and easily uh view the file as well.

B

So if you can see here what happened here is this file just got uploaded? And it's the recent time step here, my local time in here- and this is the ipfs CID of the file and very soon you will see this file being picked up by uh storage minus on the filecon network. So this is like more stronger guarantees that not just the file is instantly retrievable on the ipfs network, but also available on file coin Network as well and let's say you wanna upload, load encrypted file.

B

You can turn on the encryption here, and this is something that you can do from our SDK as well. But we build this sample application in its open source on GitHub, so you can look in into its code as well.

B

um So let me upload this sample file of my colleague ravesh, who will be demoing today itself, so to upload an encrypted file. You obviously need to sign which I just did and to view this file. I can again select the wallet that I used to sign in which is like evm based wallet metamask in this case and then sign and boom. The file is decrypted.

B

The cool thing with this is uh this decryption and encryption happened without any centralized, Key Management so, rather than the key to the file being stored at either the client send or at a single server.

B

We use some interesting set of cryptography underneath called as BLS threshold cryptography to make this happen and then share the access to the file pricelessly, so imagine building an excess control around the data being stored here, where I can add a condition like I want a particular NFD collection owners to view this file, so I can select, let's say of virtual machine and let's have, if I deployed a custom. Nft contract in there I can select the contract time.

B

Then the contract address and then put up a comparator that I want only users who, own more than let's say one pudgy penguin nft, to view this file uh I can easily create this excess condition and these excess conditions can be uh coupled with another set of excess conditions, even across change. So this logic Works uh multi-chain, so you can have one nft on Falcon, Virtual, Machine and then, let's say 1000 away tokens on polygon chain and then only you can access the file. If you satisfy these two conditions in your wallet.

B

So something like this a complex logic. You can build on top of Lighthouse and build um interesting set of token gated applications, but you have to start off as a developer. uh You can like come here, generate a new API key. Let's say: I can name it E3 um and then the key is generated here and then uh go to our documentation. We have like bunch of code examples here.

A

B

I think I I'll stop in here and then let my colleague uh ravish takeover, maybe I, should also leave the call so that he'll join in right away and.

A

Yeah, just a second I, don't know if you've got any any questions specific to what you just showed. I mean I, I love that access control thing, I, love the fact that you can just take arbitrary parameters and say: okay, if somebody has this nft or this amount of token or whatever, and just you know, build them together with a set of you know. Predicates um I think is uh that that is really awesome.

A

um So that's cool and the encryption bit a lot of people ask about encryption on on falcoin and I generally Point them towards Lighthouse and say you know what you do. Is you build that on top you know and- and you know, give them an example of of Lighthouse, as uh as you know how people do that, so that's cool um okay, I'm, just looking I, don't think we've got any! Oh uh there's a question here. Mega make asks in the in case this code needs to be adapted, is Lighthouse files, open source, yeah.

B

It is so if you go to our website right now and I'll also drop in the link here. If you can see that link, but if you go to our website, we have our GitHub there and then you can find this repo of files jab and play around with it. um Let me drop in the link to that now chat message in here.

B

um If you guys can see it yeah.

A

I can grab that one second here, I can uh copy that link and put it here in the chat for people um there we go. There's.

B

A

Address there um so I've put that in for that cool, okay, um yeah I think you're gonna have to drop off your colleague to then join and it. So, if you do that and then um he can join and uh listen.

B

Yeah stand by I'll, we'll.

A

Be here, okay, great to see you so yeah, okay, so they're just switching over and then its colleague will be uh hopefully back in a second, um so that will be cool um but yeah I I, really like that um what they, uh what they do there.

A

uh ah Okay, we have him back again, just one second, um however: okay uh ravish, what you're going to need to do sorry about this is um when you joined I, think it gave you the option of a I think he's disappeared now of a webcam or screen share you're going to need to pick webcam first and then add screen share it's a little bit confusing.

A

um Okay, hopefully he'll be back again in a in in a sec. uh One of the things about doing uh sort of producing live shows like this. um We uh ran out of time to get uh people kind of scheduled in for tests beforehand. So um hopefully he will be back shortly.

A

um The stream is Live friends, exactly as Dawn run for pancakes is saying: it's a live stream, so you get everything ah brilliant okay, so we have rubbish back uh he's on the same link as nandit, so it does say Nanda at the bottom, but it is actually ravish.

A

um So uh yeah I, don't know. If you just wanted to introduce yourself rubbish and uh uh away you go.

C

So yeah, hey everyone, I am ravish, so I work as a CTO of Lighthouse I manage the entire product, its development and everything and I think it's the best time to be in the three ecosystem. It's a growing industry in the early stages. So a lot of us go for Innovation and I, like what I'm doing.

A

Cool um yeah, if you want to share your screen, if you look along the bottom there, it's the uh one two three, four, five, six icon along there's a picture of a screen there and if you click.

C

A

Yeah the screen.

C

Thank you, wow.

C

All right so I think nanded left here. So let's start with a quick demo, so.

B

C

Go to our Docs.

A

Great that's good, yeah I could see you cool.

C

Yeah, so you will find a couple of code examples, so these are like copy and paste code example. You just need to follow these steps. In case you are using react.js, next.js or any browser environment. You can use the browser code examples and in case you are using on the server side. You can use the node.js code. Examples also to mention our python. Sdk will also be live produce, so there will be limited functionalities, but you will have upload functionalities and view your file functionalities initially, and we will keep adding more and more features.

C

So, let's start with a quick, let's create a quick application where we will be uploading our encrypted file to ipfs, and then we will be using token getting to decrypt that file. So for that, what I will do is I will just take this node.js encryption example. I have already copied it into uh for my vs4 and if you just if you can have a look at the code, this is the path to the file. I will be streaming a video after encryption.

C

uh I have the API key, which nandith mentioned in the presentation you generated using the file step. You can place that API key in the environment. Variable third, is the public key. A private key of the wallet will be required in this server side environment, to sign a message with the encryption notes so and in the browser this part will be managed by any of your browser wallet, and this is a quick function upload encrypted. That's it with this. You can upload a file with encryption, so if I just run the code.

C

Yeah, so file is uploaded to ipfs and with encryption. So if I just open this file using any Gateway.

C

So what happens? Is it downloads me uh binary? So I don't know what I should do with this file. Now, let's try to decrypt this file so for decryption. You can follow two routes. First, one is you can. If you want to create your custom page, you can follow this decrypt script. This code example is for node.js and in case of browser you can use this particular code example. We have already implemented it into a URL which is View.

C

So I will I will be using this this URL, but the code entire code of this URL. You can find here and you can customize the page as per your requirement. So if I just copy this CID.

C

And I need to change my wallet to the one which I used for encryption.

C

I. Think it's this one.

C

That sometimes happens with this.

C

C

With which I uploaded a file with encryption, but if I change that particular wallet so suppose, I'll now go to wallet one. This wallet don't have in that wall is what the admin this wallet doesn't have access access to the file. So if I just open this file in a URL in a new tab.

C

Now I don't have the access, because this particular wallet is not granted the access to the file. So now, let's deploy a contract on so we are, we will be creating a custom condition, but what you can play around is uh num. So let me show you what are the possible conditions which you can apply with encryption? So suppose you want to Grant access to the file to a user who owns nft of a particular collection. Then you can follow this code example.

C

So suppose this is for for a wallaby chain. A method is the balance of from the ERC 721 contract, and this is the contract address and comparator is like either he owns one or more than one nft. If these conditions are satisfied, then the user will get access to that file. What I will be trying around here will be this Custom Contract, so you can summon any of the function of your contract.

C

I will be using get, and if the output of that function is equal to 1, then we will grant access to that file to our user. More conditions can be tried out, sir, like the native token conditions. So if a person has this much file coin or this much eth in this wallet, then you can allow access or a Time based condition where you can have a birthday kind of example. Where suppose a user has a birthday, so you can define a condition so unlock the file after this many block period.

C

All of these can be tried around plus you can combine two or three more conditions together. So if I, just foreign.

C

I now I am going to try this access condition code example it's in the dock. You can just copy paste this one and it will work. So if you want to apply one more than one condition, you can just keep pasting the condition and you can. You will have to use this condition ID. So this is condition one. Then this becomes condition two and you can just play around like this one and two. So if both one and two are satisfied, then user will have access to a file. So let's try with one condition so.

B

C

Already have a code, let me just compile it.

C

Okay, it's here, yeah I've, already deployed it actually. So this is the wallet address uh means the contract address, so I will just paste it.

C

So this one will be my contact address and let me take PC ID.

C

Here it goes so now we have the CID, we have the public key, so this person who has encrypted the file and uploaded the encrypted file is only one who can grant means create access conditions, so it will be my wallet.

C

This is the condition. This is the aggregator and our signature, and that's it. So let me just run it.

C

Okay, so now conditions are applied. So, let's so it checks if the value is one from the function and if I go here and I just get the count at kids one, so the file should be able to decrypt for every user node. Now, let's just try this out.

C

So I am again copying it open a private window, check the wallet so now again the wallet last time this wallet did not have the access. Now, let's see.

C

So this time this wallet is able to decrypt the file. We can try something more so now, let's update the variable, let's increment it.

C

Hyperspace transaction can take a little time.

A

Yeah, it's one of the things we're doing live demos. You often end up, especially on blockchains waiting for uh waiting for blockchain to complete.

C

Transaction yeah.

C

I think this one field- maybe it was deployed because oh we can do it in another way. Also, so let's do it zero. Last time the value was 1, and so, if I run this access condition again with putting it 0 what it will do is it will overwrite the last condition. Now it got confirmed, let's check the value.

C

Oh, it's 2.. We can try it out.

C

Again, taking this link.

C

Okay same wallet last time the value of variable was 1 and wallet was equal to decrypt the file. Now it's not able to decrypt the file because we just updated the value to 2 and the condition is set to 1. sorry yeah. So this is how you can play around with our Access Control feature.

C

So if I just conclude the presentation, so as a bounty you we have a 2500 Bounty for using best use of Lighthouse SDK. Also, if you are using lighthouse in any other Bounty, you will be available for prices and thank you do join our Discord Discord in case you have any very.

A

Fantastic thanks a lot ravish now, I, don't know if there's any questions uh that are coming up. If people have any questions, we've got a few minutes uh before our next guest. So if anybody has any.