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NanoFusion - Project Update and Next Steps

Build-Off Result

I'm sure some people will be wondering about the status of the NanoFusion project going forward. Naturally, the outcome of the Nano Build-Off was pretty disappointing for me personally. After initially receiving such a wave of positive feedback here on reddit, it was unfortunate to not even crack the top 20 projects.
In spite of that result, I think the community's desire to see a trustless privacy protocol in the Nano ecosystem is actually quite strong. I believe this Build-Off result is primarily a reflection of the judging criteria, which skewed strongly towards apps that were already somewhat polished, and able to be tested by one person within the space of 10 minutes. This naturally disfavours a project like NanoFusion which is still a proof-of-concept, and requires multiple participants in order to properly use it. All that to say, while I applaud the winning projects for their efforts, and extend my gratitude to Nanillionaire for sponsoring the event, I don't believe that the Build-Off result gives a full picture of the community's true priorities for future development of the Nano ecosystem.
Nevertheless this result points to a stark reality: NanoFusion is not yet ready for consumer use, not by a long shot.

What will it take for NanoFusion to be consumer-ready?

Protocol and Reference Implementation Status
There is a small amount of work to be done to finish the reference implementation of the protocol. The binary tree of input mix accounts has been constructed, but the code is not yet written to actually execute the mix, nor to trigger and execute refunds where necessary. That is really the last step that needs to be completed for the reference implementation, and it's not especially complicated. The tricky bit is that there are still a few bugs around communication between the clients that need ironing out. But those are relatively minor bugs, I'm confident they won't require fundamental changes to the protocol or the implementation architecture.
However, once the reference implementation is complete, that is where a whole new set of challenges begins.
Wallet Integration
The primary challenge will be to integrate NanoFusion into one or more popular wallets. For a privacy protocol to be most effective, we need as many people as possible using it. In a cryptocurrency like Nano, where transactions and addresses are all publicly visible on a block explorer, privacy is achieved by making it difficult to determine which transactions belong to you. Making it difficult is a matter of having your transactions get "lost in the crowd". The crowd of transactions that might potentially be yours is called the "anonymity set". We need that anonymity set to be as large as possible, which means we need as many people participating in Fusion events as possible.
The best way to achieve this is to get NanoFusion adopted by popular wallets, and ideally to have it enabled by default. The less decisions that a user needs to make in order to start participating, the better.
This raises one very important question. How do we make it as easy and appealing as possible for the developers of popular wallets to integrate this technology?
Workflow Design
In order to make NanoFusion integration appealing to wallet developers, I believe we need to gear NanoFusion integration around workflows that actually work for end-users of the wallet. This is not as simple as it appears.
The Nano ecosystem is currently geared around the assumption that addresses will tend to be re-used for many sends and receives. This is almost intrinsic to the ORV consensus mechanism. You keep your funds in one account, and the voting weight for that account is assigned to your representative.
In a UTXO-based cryptocurrency, BCH in particular, it is much more normal to use a separate subaddress for every incoming transaction. CashFusion on BCH works by taking all your different receive addresses and mixing the funds from those addresses together (along with the funds of many other people's subaddress sets). But on Nano it's different. Imagine you have an online store accepting Nano funds via BrainBlocks integration. If you receive 100 payments, you might have BrainBlocks forward them all to just one account that you own. But this makes it trivial for a customer to look at the block explorer and see all of your sales volume, which completely undermines your privacy.
In the context of something like BrainBlocks, it's easy to see how our e-commerce store could generate a new address for each transaction, and have BrainBlocks forward funds to that new address. Then we could run NanoFusion later to obscure the linkages between our individual sales. But what about addresses that are shared in public? Lots of people put up single Nano addresses to receive donations, etc. What does NanoFusion do with those? For NanoFusion to be most effective, a given user should NOT have just one input and one output account in the mix. It makes it too easy for their input and output accounts to be linked (at least to a moderate-to-high degree of probability) by the publicly visible amounts in the accounts.
For NanoFusion to be most effective, we need to develop a culture where it is normal for people to use a new address each time they receive some nano. How do we make it appealing for wallet developers to build their wallets this way? I don't really know. The only example of this pattern that I know is Nanonymous (https://github.com/LilleJohs/Nanonymous). We could potentially implement something like stealth addresses, so that the user really gives out one canonical public address, but a different receive address is actually used for each transaction "under the hood". However, that adds a whole new layer of complexity. It means wallets have to be upgraded to know how to interact with a stealth address.
API Design
Even if we could arrange things so that it was more common for individuals to have multiple input accounts to mix, we would still be left with another question. What would wallet developers want the API for NanoFusion to look like? By nature, NanoFusion requires a large number of messages to be sent back and forth between all of the mix participants. For security reasons, those messages cannot be sent all at once. Player A has to wait for Player B to send message 1 before it is safe (cryptographically) for Player A to reveal the content of message 2.
What should a library look like that manages that complexity on behalf of the wallet developer? What language should it be written in? I have begun this project under the assumption that the most common wallet-dev language would be javascript, but there may be cases where other platforms are needed.

Where To From Here?

Technical Reflections
Thinking through all of these practical challenges has given me a new perspective on the whole issue of cryptocurrency privacy protocols. I have a much greater respect for what has been achieved by the Monero project. In Monero, everyone actually uses the privacy protocol. As described above, that is no small accomplishment. Even though the privacy protocols for Dash, ZCash, BTC and BCH do basically work, their use is not widespread. Even leaving aside the issue of the extra transaction fees incurred (which is not such a problem for Nano), these optional privacy protocols are just not that convenient to use. Because not everyone uses them, the anonymity set is not nearly as large as it could be. And because not everyone uses them, transactions you do before and after a mix/fusion event leak metadata which can be used to undermine the privacy that you gained by using the privacy protocol in the first place.
Inevitably, NanoFusion will also suffer from this problem. Suppose that 20% of the Nano community starts regularly participating in fusions (a very generous estimate, given the low adoption rate of optional privacy features in the other cryptocurrencies mentioned). That still leaves the large majority of transactions probably re-using addresses most of the time. This means that the non-private majority will leak fresh metadata whenever they interact with accounts that were previously obscured through NanoFusion. This is not an easy problem to overcome. It can only be done with a culture shift towards ubiquitous privacy, and that can probably only be achieved by all major wallets agreeing to enable privacy features by default. Not an easy hill to climb.
Personal Circumstances
For the sake of transparency, I also want to mention that I will be stepping back from NanoFusion for a while. This is simply a necessity of life. Our first child will be born in a few months. Once that happens, I will obviously have a lot going on and much less time available to work on these kinds of side projects. Between now and then, I need to focus on other projects which have more potential to generate some income for my little family. I'm a dad now(!), and my family comes first.
I'm very glad to have (hopefully) contributed some useful groundwork for the process of bringing privacy to Nano. This project also gave me the chance to learn some new technologies at a much deeper level, I'm grateful that too. Neverthless, for the foreseeable future, I'll be stepping back. I don't make that decision lightly. I put a lot of blood, sweat and tears into bringing NanoFusion this far, so I definitely hope it doesn't just fall by the wayside. I hope others will pick it up and run with it in my absence.
Call to Action
Want to make NanoFusion happen? Here's what we really need next:
  1. Wallet Developers - we need you to speak up. Tell us, what would an ideal NanoFusion API look like? How can we make it as easy as possible for you to integrate NanoFusion into your wallet app? What programming language do you want to use to consume that API? What I would love to see is several wallet developers collaborating together to create a document describing their ideal API. That will make it much easier for potential developers to pick it up and start implementing it.
  2. Javascript developers - are any of you interested in stepping up and finishing off the last bits of the reference implementation for NanoFusion?
As always, details of the project are available at http://nanofusion.casa (including demo videos, technical whitepaper and the link to the GitHub repo).
God bless everyone, thank you to all those who have followed along and offered so much encouragement for this project.
submitted by fatalglory to nanocurrency [link] [comments]

MAME 0.221

MAME 0.221

Our fourth release of the year, MAME 0.221, is now ready. There are lots of interesting changes this time. We’ll start with some of the additions. There’s another load of TV games from JAKKS Pacific, Senario, Tech2Go and others. We’ve added another Panorama Screen Game & Watch title: this one features the lovable comic strip canine Snoopy. On the arcade side, we’ve got Great Bishi Bashi Champ and Anime Champ (both from Konami), Goori Goori (Unico), the prototype Galun.Pa! (Capcom CPS), a censored German version of Gun.Smoke, a Japanese location test version of DoDonPachi Dai-Ou-Jou, and more bootlegs of Cadillacs and Dinosaurs, Final Fight, Galaxian, Pang! 3 and Warriors of Fate.
In computer emulation, we’re proud to present another working UNIX workstation: the MIPS R3000 version of Sony’s NEWS family. NEWS was never widespread outside Japan, so it’s very exciting to see this running. F.Ulivi has added support for the Swedish/Finnish and German versions of the HP 86B, and added two service ROMs to the software list. ICEknight contributed a cassette software list for the Timex NTSC variants of the Sinclair home computers. There are some nice emulation improvements for the Luxor ABC family of computers, with the ABC 802 now considered working.
Other additions include discrete audio emulation for Midway’s Gun Fight, voice output for Filetto, support for configurable Toshiba Pasopia PAC2 slot devices, more vgmplay features, and lots more Capcom CPS mappers implemented according to equations from dumped PALs. This release also cleans up and simplifies ROM loading. For the most part things should work as well as or better than they did before, but MAME will no longer find loose CHD files in top-level media directories. This is intentional – it’s unwieldy with the number of supported systems.
As usual, you can get the source and 64-bit Windows binary packages from the download page. This will be the last month where we use this format for the release notes – with the increase in monthly development activity, it’s becoming impractical to keep up.

MAME Testers Bugs Fixed

New working machines

New working clones

Machines promoted to working

Clones promoted to working

New machines marked as NOT_WORKING

New clones marked as NOT_WORKING

New working software list additions

Software list items promoted to working

New NOT_WORKING software list additions

Source Changes

submitted by cuavas to emulation [link] [comments]

MAME 0.221

MAME 0.221

Our fourth release of the year, MAME 0.221, is now ready. There are lots of interesting changes this time. We’ll start with some of the additions. There’s another load of TV games from JAKKS Pacific, Senario, Tech2Go and others. We’ve added another Panorama Screen Game & Watch title: this one features the lovable comic strip canine Snoopy. On the arcade side, we’ve got Great Bishi Bashi Champ and Anime Champ (both from Konami), Goori Goori (Unico), the prototype Galun.Pa! (Capcom CPS), a censored German version of Gun.Smoke, a Japanese location test version of DoDonPachi Dai-Ou-Jou, and more bootlegs of Cadillacs and Dinosaurs, Final Fight, Galaxian, Pang! 3 and Warriors of Fate.
In computer emulation, we’re proud to present another working UNIX workstation: the MIPS R3000 version of Sony’s NEWS family. NEWS was never widespread outside Japan, so it’s very exciting to see this running. F.Ulivi has added support for the Swedish/Finnish and German versions of the HP 86B, and added two service ROMs to the software list. ICEknight contributed a cassette software list for the Timex NTSC variants of the Sinclair home computers. There are some nice emulation improvements for the Luxor ABC family of computers, with the ABC 802 now considered working.
Other additions include discrete audio emulation for Midway’s Gun Fight, voice output for Filetto, support for configurable Toshiba Pasopia PAC2 slot devices, more vgmplay features, and lots more Capcom CPS mappers implemented according to equations from dumped PALs. This release also cleans up and simplifies ROM loading. For the most part things should work as well as or better than they did before, but MAME will no longer find loose CHD files in top-level media directories. This is intentional – it’s unwieldy with the number of supported systems.
As usual, you can get the source and 64-bit Windows binary packages from the download page. This will be the last month where we use this format for the release notes – with the increase in monthly development activity, it’s becoming impractical to keep up.

MAME Testers Bugs Fixed

New working machines

New working clones

Machines promoted to working

Clones promoted to working

New machines marked as NOT_WORKING

New clones marked as NOT_WORKING

New working software list additions

Software list items promoted to working

New NOT_WORKING software list additions

Source Changes

submitted by cuavas to MAME [link] [comments]

MAME 0.221

MAME 0.221

Our fourth release of the year, MAME 0.221, is now ready. There are lots of interesting changes this time. We’ll start with some of the additions. There’s another load of TV games from JAKKS Pacific, Senario, Tech2Go and others. We’ve added another Panorama Screen Game & Watch title: this one features the lovable comic strip canine Snoopy. On the arcade side, we’ve got Great Bishi Bashi Champ and Anime Champ (both from Konami), Goori Goori (Unico), the prototype Galun.Pa! (Capcom CPS), a censored German version of Gun.Smoke, a Japanese location test version of DoDonPachi Dai-Ou-Jou, and more bootlegs of Cadillacs and Dinosaurs, Final Fight, Galaxian, Pang! 3 and Warriors of Fate.
In computer emulation, we’re proud to present another working UNIX workstation: the MIPS R3000 version of Sony’s NEWS family. NEWS was never widespread outside Japan, so it’s very exciting to see this running. F.Ulivi has added support for the Swedish/Finnish and German versions of the HP 86B, and added two service ROMs to the software list. ICEknight contributed a cassette software list for the Timex NTSC variants of the Sinclair home computers. There are some nice emulation improvements for the Luxor ABC family of computers, with the ABC 802 now considered working.
Other additions include discrete audio emulation for Midway’s Gun Fight, voice output for Filetto, support for configurable Toshiba Pasopia PAC2 slot devices, more vgmplay features, and lots more Capcom CPS mappers implemented according to equations from dumped PALs. This release also cleans up and simplifies ROM loading. For the most part things should work as well as or better than they did before, but MAME will no longer find loose CHD files in top-level media directories. This is intentional – it’s unwieldy with the number of supported systems.
As usual, you can get the source and 64-bit Windows binary packages from the download page. This will be the last month where we use this format for the release notes – with the increase in monthly development activity, it’s becoming impractical to keep up.

MAME Testers Bugs Fixed

New working machines

New working clones

Machines promoted to working

Clones promoted to working

New machines marked as NOT_WORKING

New clones marked as NOT_WORKING

New working software list additions

Software list items promoted to working

New NOT_WORKING software list additions

Source Changes

submitted by cuavas to cade [link] [comments]

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submitted by free_tutorials to u/free_tutorials [link] [comments]

Move beyond test cases: Identify star coders through AI-powered online coding

Tech hiring is undergoing a transformation. Recruiters increasingly rely on coding assessments to evaluate job applicants and weed out poor performers from the candidate pool. Because if someone cannot code well, then what is the point of keeping them around? But this represents a myopic view of talent that does not always give a fair picture of what a candidate has to offer.
This sad state of affairs is not entirely the recruiter’s fault. The fact is, traditional coding assessments encourage this type of pass/fail mindset. But traditional coding assessments have limitations. They judge candidates on their ability to write a compilable code within a specified timeframe. But we all know that candidates commit minor errors while coding, such as errors in syntax. Or they might not take into account all test case scenarios. This is especially true when coding under pressure. But despite the insignificance and very human nature of these errors, the assessment is merciless. Otherwise fine candidates are severely penalized for these mistakes and taken out from the selection funnel.
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submitted by AM-2008 to u/AM-2008 [link] [comments]

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