lihorne

Hey, I'm one of the developers at Tempo. We're working on an extension type for subscriptions to propose being added to the spec as well! We're starting with the simple types, but subscriptions are a natural extension. The subscription intent will work similarly to a one-time charge—the server returns a 402 with intent="subscription", and the client signs a recurring authorization.

OP Labs | Remote-first | Full-time

https://optimism.io

Optimism is an Ethereum scaling solution that enables anyone to execute any vision on an open source protocol that will never be captured by private interests. We’re building this technology as a public good, in order to fundamentally change the relationship between companies and their users.

From code to ethos, we are Ethereum-aligned. By operating as a Public Benefit Corporation, we align private incentives with public good and create a positive-sum economic model that provides a sustainable future for the internet.

Today, the most pressing bottleneck to Ethereum and crypto’s growth is its performance and scalability. We are building the most elegant solution to this problem. We do this out in the open because we believe in open source and its ability to accelerate innovation.

To date, we have raised $178M. Both series A and B were led by Andreessen Horowitz and Paradigm.

We are actively hiring for the roles listed here: All open roles are listed here:

https://boards.greenhouse.io/oplabs

Join us in scaling Ethereum and empowering the creators of public goods! :)

OPCraft is an Autonomous World—a fully on-chain virtual space where every single aspect of the World—every river, blade of grass, and patch of snow sitting atop the mountain ranges—exists on-chain, and every single action in the World happens as an Ethereum transaction.

Just like other crafting-based voxel Worlds, you can explore procedurally generated landscapes, mine ores, place materials, and craft new items. Players can create majestic architectures, erect monuments, and terraform the land; either alone or collaboratively.

OPCraft runs on an op-chain; meaning the blockchain is mainly being used towards updating the World as players modify it. Just like a normal rollup, developers can deploy smart contracts on this chain and anyone can run a node in order to access it.

OPCraft’s network runs on Optimism’s OP Stack architecture, with simple adjustments made for higher throughput and shorter block times.

Full writeup here: https://dev.optimism.io/opcraft-autonomous-world/

You're right that we could have been better communicators about this. We prioritized our concerns with applications that could break during the upgrade, and we biased our public communications towards developers as a result.

For example, you're right that a notification on our homepage, in addition to our docs, would have been a good reminder to users. We'll work on getting a blog post and better documentation up that explains exactly how to access data from before 11/11. We really appreciate the candid feedback here.

We're a very fast growing startup tackling a herculean task, so we're bound to make mistakes and this is one of them — I hope you can understand. We want to be much better communicators going forward.

This is a fantastic question for pretty much every scaling solution out there — as the initial engineering work on rollups finish, many of the fundamental scaling problems re-emerge on L2. Right now, our system's hardware requirements are very similar to L1 mainnet, but the state is growing.

There are two solutions in the future: statelessness, and block-producer/verifier asymmetry. Statelessness (and related concepts like state expiry) has been under active research in Ethereum for years, and we've recently started our own contributions with a new stateless Ethereum client [1]

The other part of the solution is to leverage asymmetries between the hardware requirements of block producers and verifiers. TLDR: this lets you have high HW requirements for sequencers, but still secure the network with laptops. Vitalik recently wrote about this; you can read that here [2]

[1] https://twitter.com/ben_chain/status/1488275978983915523?s=2... [2] https://vitalik.ca/general/2021/12/06/endgame.html

The Nov 11 upgrade radically changed how Optimism's backend worked. Transactions after 11/11 are executed in a VM that's much closer to the EVM than before. It's still possible to run nodes that access these pre-11/11 transactions, but because of the way Etherscan and geth are designed, it's unfortunately not as simple as just serving the same data again.

Etherscan CSV exports are the best solution we had that didn't require significant modifications to Etherscan's backend. You should be able to use the CSV feature to export all of your relevant pre-11/11 transaction data (transactions and ERC20/ERC721 transfers).

While we did our best to communicate this months in advance on our twitter, blog, discord, and documentation, it's hard to reach everyone and we totally agree that this is not ideal. At the time, we had to prioritize progress, but we've since made a firm commitment to not to update the chain in this way going forward. So, this shouldn't be something people will need to worry about in the future.

Fixed, sorry

Hey! Optimism's head of engineering here!

We're super greatful to saurik for writing up such a great analysis of what he found. If you want to hear some of our key takeaways as the maintainers of the network, you can check out our disclosure post here [1].

If you're wondering WTF Optimism is... we are building an optimistic rollup on top of ethereum. The basic idea is to de-couple blockchain computation from data availability and allow a new operator to exist called a sequencer which can accept transaction requests and submit the calldata to Ethereum Mainnet, but do the computation on Optimism Mainnet. There is an idea of a fault proof which means you can verify that the computation done on Optimism Mainnet followed the exact rules of the EVM, and you can prove this on Ethereum Mainnet. Our fault proof codebase, cannon, was built by another jailbreak legend (geohot) precisely with the goal of running Ethereum's battle-tested code and minimize the chances of bugs like this. It's some really cool stuff. If you're into compilers, VMs, and blockchains alike, check it out! [2]

The protocol is still in active development, it is not done yet, and that's exactly why we set up this bug bounty program. We think bug bounties matter, a lot, and we're proud to now become the record holders of the largest bug bounty payout in history, however we hope to very quickly be beaten by someone else. Developers like saurik, who we've gotten to know recently, are super important for this ecosystem to thrive. Building this stuff is hard, and we want the best hackers in the world to get rich breaking these protocols because if we succeed in this industry, this technology will be the backbone of the world's financial infrastructure — it needs to be secure. Everything we write is also MIT licensed and developed completely in the open.

Very happy to answer any questions, I'll check this thread for the rest of the day — AMA :)

Also, we are hiring! [3]

[1] https://optimismpbc.medium.com/disclosure-fixing-a-critical-... [2] https://github.com/ethereum-optimism/cannon/ [3] https://boards.greenhouse.io/optimism

The budget concept is a security measure between the app and the wallet, so that the app code only has control over a fixed amount of funds in the wallet.

Within the app context, an unlimited number of channels (up to the budget capacity) can be opened. The video at the top of the blog post is an example of a single user downloading from multiple other leechers & seeders while simultaneously uploading to other leechers.

L4 Research | Cryptoeconomics Researcher | Anywhere | REMOTE | Full-time

We're doing research on bleeding-edge protocols that will define the future of the internet. Primarily we are focused on state channels research, but we also want to build a team of deeply motivated researchers to study and contribute to the greater understanding of things like proof of stake, Plasma, zk-SNARKs, and more that you might find on https://ethresear.ch.

We immediately aim to turn our research into practical working implementations and open source frameworks that benefit the entire industry.

Check out https://l4.ventures/jobs

Hi, I'm one of the founders of the event. Ethereum took the core technology behind Bitcoin (the blockchain) and figured out a way to generalize it for any kind of decentralized application. Vitalik has a great overview you can watch here: https://www.youtube.com/watch?v=66SaEDzlmP4

Regarding the event, you can read our philosophy here: https://ethwaterloo.com/philosophy.html. Essentially we believe that the technology has immense potential, but there is an enormous shortage of talent and general understanding of how to build applications on top of it. The simple goal we aim to achieve is to educate and inspire talented developers to build on Ethereum. There is no other agenda, and to that end it is free for all attendees.

Regarding sponsorship, we're primarily backed by Blockgeeks Lab out of Toronto (blockgeekslab.com), which is a blockchain-based accelerator started by Dmitry Buterin. We're also accepting a carefully selected group of companies with an interest in developing applications on / learning more about Ethereum to sponsor on a case-by-case basis.

Don't forget about Kitchener-Waterloo in Canada.

Because students don't know how much a company wants them, and so cannot set their ranking with that knowledge in mind. For example, Apple could rank a student a 9 and Microsoft a 2, but to the student it looks like their level of interest is the same. The student could personally prefer Microsoft, but have a low chance of getting matched, whereas if they knew Apple was closer to a sure-shot of having a job, they might be more risk-averse and rank Apple as their most desired over Microsoft.

We've been using Zube for several months now and are really impressed with how fast the team has turned this into such a powerful platform. We quickly switched from ZenHub to Zube because of how fast and easy it was to prioritize issues and manage dev sprints (using milestones).

I see, that's awesome! Great job juggling everything to make this work!

How do you only pay $80 for Slack a year? Their base price is $6.67 / user / month on an annual plan, so $80 gets you 1 user on Slack. Huh?

I am one of the founders of Hack the North (in Waterloo). We completely agree. In fact, last year we didn't offer any top prizes. Instead, there was a "top 10" which got to present their hacks to everybody. This kept the event fun, and not competitive.

Ethereum will be released and much of what happened to Bitcoin we will begin to see happening with Ethereum, only it will likely grow much faster.

You've got me so excited for that plugin, any ETA?

It's back up now as of 09:22AM PDT. 14 minute downtime.

I guess the obvious concern is with someone figuring out a way to turn any smartphone into a key to enter any room; I'm guessing it would be easy to do given access to the person's email? Hopefully they make sure that it's done right the first time before any kind of incident.