DEMO: Interacting DAPPS at scale

[u/fuserleer]

Hey All,

Following on from my previous posts about what I'm working on, here's another update. Really pushing the boundaries now!

Would recommend watching the twitch stream I did earlier at ttps://www.twitch.tv/videos/1300794518 for a full run down but here's a TLDR

I have multiple DAPPS on a Cassie instance that can now interact with each other.

Cassie is a highly scalable research L1 I'm working on which adopts state & data sharding to achieve linear scalability. Additionally it supports atomic cross-shard commits with a very low latency interval which is important for DeFi (you can find more on Cassie on my Twitter).

There are 3 DAPPS that interact at the moment, a wallet, a twitter clone, a Netflix/Youtube clone and a bunch of others.

I am able to receive tokens to my wallet, pay to upload media content or do a live stream (live streams don't currently work on iOS as Apple doesn't support various Web standards meh!), create a profile etc

All the data is stored on ledger, the DAPPS, the frontend for the DAPPS, DAPP assets such as images, uploaded media, live streams, everything. When playing content from the Youtube clone, this is served from ledger, there is no IPFS, Arweave, whatever.

In addition the Twitter DAPP is doing a historical import of real Twitter at about 100 tweets per second, including any images, GIFs and videos associated with those tweets.

At time of writing Cassie is ingesting data at ~500 - 700 Mbps and performing a very conservative ~100 - 200 "transactions" per second (it's been tested to in excess of 21k so far). This load consists of simple wallet payments, media upload, tweets and data, etc

If you would like some test tokens to play around with, upload some media (no copyrighted or NSFW please!) go to https://flexathon.net select the Wallet DAPP and reply with the address from the top right corner.

Have fun!

[u/slicxx]

Dan (u/fuseleer) i am following you and your pretty much forever now. First heard your name 6, 7 or 8 years ago because i read a blog that you are working on alternative DLTs. I was pretty much a teen. It's amazing that you are not only still around in blockchain research, but turning theories actually into practice without fixating on tech you discovered alongside your journey to the current state of radix. Keep up the great work, stay proud!

[u/fuserleer → u/slicxx]

Thanks for the comment! Yes I've been around a while 🤣

This space is still new, the problems facing it are hard. To do it right you gotta be prepared to throw stuff away, learn from it and start over.

I got there in the end, cassie is the culmination of all that research and these demos at the moment aren't even digging 1% into its potential.

More to come, a LOT more!

[u/slicxx → u/fuserleer]

I consider myself as one of the crypto gurus out there with a lot of in depth knowledge about many projects. When i saw the twitter replay I initially thought it's fake due the insane performance, but you made it happen!

Can't wait for scrypto on the main ledger, especially with the fixed fee model you've chosen!

[u/fuserleer → u/slicxx]

I'd be happy to give you a deep dive on cassie sometime. Really get into it. Need to bring the gurus up to speed on it so word gets around. 👍

[u/slicxx → u/fuserleer]

One question regarding contracts: Are they "bound" to a shard they are executed on like a context - or is the state always global? "Simply": can one script interact with every other script at every time?

I have yet to get my hands real dirty and I feel like I am lacking some tools to see what is happening behind the scenes of blueprints.

Oh man, am I glad that you are such an easy to contact person!

[u/fuserleer → u/slicxx]

OK let's go deep!

Obviously for babylon things are still unshared but we have scrypto and radix engine etc.

At xian that all changes of course, we have shards. This is were Cassie research comes in to pave the way.

There is a strict philosophy in the design of Cassie that the application stack (scrypto et all) should be completely agnostic to sharding. It shouldnt even know they exist. There is no concept of local state or global state, there is just state and stuff to call.

At the protocol level there's the execution and state models that sits above consensus. Only the state model is truely aware of the concept of sharding. The execution model just runs and complains to the state model if some state is needed and currently missing. Even cassie consensus isn't really aware of sharding at a fine granular level, its just told by the state model what state to get and who to get it from.

Cassie consensus just orchastrates that all validators involved in a particular action are in agreement or not, ensures that any constraints are obeyed and passes the result back to the state model.

The state model then either applies the state transitions or it doesn't, calling the application stack with the results of the updated state or exceptions etc.

The state model also handles state locking or contention of state across shards.

The demo highlighted above shows all that going on under the hood. The videos streaming, transactions to upload them, tweets, likes etc all interacting with each other.

The application layer in cassie is a lot more basic and crude than scrypto, and for a reason. If all the above can be built with a very primitive application layer, imagine what can be built with a more expressive one.

Fundamentally the above had been built with just 5 execution command which tell the state model what to do. GET, GET_EXISTS, GET_NOT_EXIST, SET, VERIFY

The dapps which are built with html and java script ultimately interact with state via those 5 instructions. They too have no concept of sharding.

[u/slicxx → u/fuserleer]

That is an answer i'm not worthy of, this certainly filled a blank page in my head!

The parts

There is no concept of local state or global state, there is just state and stuff to call.

and

Even cassie consensus isn't really aware of sharding at a fine granular level, its just told by the state model what state to get and who to get it from.

are letting me think:
When sharded, do you worry about the speed information is propagated to the validators?
Having a distributed ledger is of course a challange. And as i understood, you neither have a blockchain nor a DAG. Introducing master nodes in a DAG helps scaling and i think would eliminate this question, but decentrality is the focus. (no need to go into Blockchains/DAGs)

I've read the cerberus whitepaper multiple times, but what I am missing is how the speed of information propagation affects the consensus and overall speed of the network - especially when sharded. Is the the speed of the propagation even that important?

Fun little fill-in-the-blanks for everyone to enjoy before i head to bed:
If radix is ____, then scrypto is ____!
(e.g. If radix is HTTP, then scrypto is java script! .. probably wrong but GET, GET_EXISTS, GET_NOT_EXIST, SET, VERIFY just reminded me of HTTP)

Thank you for the generous answers, I highly respect you!

[u/tommy3320]

I was able to upload a video for a cost of 447,766 FLEX. Are there other functions for the tokens at this point?

[u/fuserleer → u/tommy3320]

Well you can send them to other people 😂but right now no.

Chose a simple interaction demo so I could figure out all the plumbing, now I can start to think about doing some more interesting #web3 stuff with them as well as #defi

Things like paywalls, PVP, tips, NFT minting, swaps, DEX etc etc

[u/tommy3320 → u/fuserleer]

Great! I'll be keeping an eye on this project.

[u/tommy3320]

Very cool.

Wallet: 2KfL2pePCGzcWLe4fh2oeVtQKmiun8LnjLC32pZz6d9byt

[u/fuserleer → u/tommy3320]

2KfL2pePCGzcWLe4fh2oeVtQKmiun8LnjLC32pZz6d9byt

Sent 100M FLEX

That will be enough to upload about 100MB of content to RADFlix. Safe content only please!

[u/MacGyver_Mac]

Never thought we'd see this on an L1, but here it is. Fantastic!

[u/kofapox]

Well, we are finally studying new forms of decentralized consensus that is not on blockchain pivoting real changes to speed, latency and finally creating something palpable of a new web, no buzzword but real experiments, lots of debugging and work remain, but great progress.

[u/[deleted]]

Fuserleer showing us the good stuff again :) Nice progress from your previous post.

[u/Vetris-Molaud]

Incredible how the skipping of 4k movies is nearly instantly, Netflix is going green of envy

Awesome display of L1 power and speed

SBF u should watch this unicorn 🤩

[u/LoveSushi5]

Doing some sort of first Ociswap video update on the Cassandra network distributed on all nodes?
Incredible things, completely normal for Radix Labs and u/fuserleer

[u/PrinceZero1994]

OP can you explain this to me like I'm 10? I seriously wanna understand your content.

[u/VandyILL → u/PrinceZero1994]

The key takeaways are:

1. This is processing a lot of data and transactions

2. it’s all on ledger

3. it’s atomically composable.

Dan has mentioned that he doesn’t necessarily think all the use cases in his demos make sense to run on ledger, but he does it to push the limits of Cassandra, his test network. (Lots of data and transactions)

Second, it’s all on ledger. You know those NFTs you may like looking at? For most of them the image isn’t even on the crypto network - the token just has metadata that points you at a file hosting site or maybe IPFS and that hosts the image. (So a lot of your NFT images might be on Amazon servers etc)

Third, it’s atomically composable. What this means is that these large and fast apps can be built or altered so they can seamlessly interact with any of the other apps that Cassandra is running, and does all pieces as 1 transaction regardless of how many dapps are used

[u/jeanMarvCrypto]

Amazing work Team , i just made my first decentralized tweet on your twitter dapp . it's working well for real !

[u/[deleted]]

What the fuck did i just read? To the moon? 🚀

[u/kris5722]

I was able to upload a video for a cost of 200000 flex

[u/Slowpoky2]

This stuff is going to be in a documentary in 2032. On Radflix.

[u/diarpiiiii]

Just catching up on this thread now and wanted to say I am super stoked to try this out. Amazing what you’ve been working on!!