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RT @Changehero_io: Black Friday at @Changehero_io! 0% commission on #BCH, #DASH, #DGB, #WAVES, #NXT, #ARDR, #IGNIS, #BCD, #TRX and #XEM exc…


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#BlackFriday2018 Stay home and #BuyCrypto. Huge discounts happening now. #BlackFriday #deals #cryptocurrency… https://t.co/KHP2QiKgVz


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I just published Weekly Crypto News - Nov III, 2018 https://t.co/fW8G2OkHYT Read up about this week's #Ardor and… https://t.co/DZ5wc1rL1Z


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RT @Crypto_Case: Да, детка! Забрал свои 300 IGNIS с конкурса от @TheCryptoWoman и @madfox1234 #NxterPuzzle | Разгадал кроссворд и вперёд в…


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RT @TheCryptoWoman: He got it! He solved the #NxterWordNoviii by @madfox1234, published by @Nxter_org, sponsored by @Ardor_Nxt_Group and em…


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The #cryptocurrency puzzle by @madfox1234 was solved early by a genius by guessing the last word. But, solve anyway… https://t.co/iuG08NTPOM


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RT @Dominium_me: Thanks for all your name suggestions! We are currently registering the new name and will announce it soon... Full details…


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RT @TarascaD: Thomas Schmall @oxpal is the team member of Tarasca responsible for creating the overall design of the project. An extraordin…


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RT @TarascaD: Do you know Kappa? They are creatures of the Japanese lakes and rivers. They love eating cucumbers and small boys, especiall…


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#HappyThanksgiving Today I will spend quality time with my family and let each one know how #grateful I am they are… https://t.co/Wo1ZeuhZcT


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I’ve said $IGNIS is where magic happens. It is the child chain on $ARDR #blockchain with all transaction features a… https://t.co/7EiKBCu7OE


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In other #crypto news: https://t.co/5t0WhmpYCZ #Ardor #hackathon, learn lightweight contracts on @udemy, $IGNIS… https://t.co/xga9STh0eS


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Nxter News – November 2018 III: Only Those who Attempt the Absurd can Achieve the Impossible

Nxter News | November 2018 (III) Only Those who Attempt the Absurd can Achieve the Impossible Welcome, dear Nxters and other followers! At the time I found my interest for blockchain, started following Nxt and began writing newsletters, Nxt's potential almost seemed absurd to me. I fell in love with the idea of cheap crossborder transactions 24/7, ... Read more The post Nxter News – November 2018 III: Only Those who Attempt the Absurd can Achieve the Impossible appeared first on NXTER.ORG.

Nov. 22, 2018, 9:51 a.m.
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TWITTER

#NxterWordNoviii clue 13 is ardor. #Ardor is parent #pos #blockchain with child chains, solutions to scalability an… https://t.co/DId4shYapX


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#NxterWordNoviii 12 is wallet and have you seen $ARDR #cryptocurrency? Choose child chain to use on login. Explore… https://t.co/ijzMHVimP1


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1 person will grab 300 #FREE $IGNIS from https://t.co/eAgv6j9WM1. Soon. But what's in the bonus #puzzle account?… https://t.co/X3hNfyvVKN


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Selling my car tomorrow. Should I transfer the ownership before getting the money? What if the buyer later refuses… https://t.co/HeRJkGJR9Q


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Have you been collecting clues for the #cryptocurrency #puzzle by @madfox1234 and published by @Nxter_org? Solve i… https://t.co/IqfQWarrD0


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#NxterWordNoviii clue 10 is asset. The asset exchange on the $IGNIS blockchain on $ARDR platform ready and easy to… https://t.co/ARd81Sdian


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RT @CryptoDemetrius: Curious to give this game a try once things are all in order. It's been fun to watch the team build out the concept in…


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RT @trifficworld: Some use blockchain technology to create cryptocurrency. We use it to create worlds. https://t.co/8WCvBfG0mh is where b…


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RT @CryptoDemetrius: Expect more mining firms to come crashing down if markets don't leap upwards soon. #POW birthed an idea, now it's obso…


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RT @CryptoCalPro: Tomorrow events, part1 (22 Nov): @ardorplatform $ARDR - Ardor Online Hackathon 2018 Submissions https://t.co/NQCPPHZ3WQ @…


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REDDIT

What makes Ardor better than EOS or other PoS platforms?

Question is in the title.

/r/Ardor
Nov. 21, 2018, 2:12 p.m.

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REDDIT

A Video Demo of the Triffic App So Far



/r/Ardor
Nov. 21, 2018, 3:51 a.m.

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TWITTER

Look at everything happening on the #Ardor #Blockchain platform at https://t.co/LOMTmyV4WE Check account balances,… https://t.co/eOKTL1jhFy


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REDDIT

The Future of Cryptocurrency



/r/Ardor
Nov. 20, 2018, 7:19 p.m.

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REDDIT

Binance Listing: Influence on Cryptocurrency Price - Coined Times

What was the effect of Binance listing on Ardor: * One week before listing: $0.157397  * One day before listing – no announcement: $0.177549 * Day of listing – highest price: $0.276239 * Day of listing – closing price: $0.235409 * One week after listing: $0.216139  [https://coinedtimes.com/binance-listing-influence-on-cryptocurrency-price/](https://coinedtimes.com/binance-listing-influence-on-cryptocurrency-price/)

/r/Ardor
Nov. 20, 2018, 3:37 p.m.

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TWITTER

Throwback to that #hackathon in #Austria when I was asked to talk about leading a #decentralized #community because… https://t.co/ZPOVEmIigc


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TWITTER

Don't talk to me about exit strategies. #notselling #bitcoin #btc #cryptocurrency #hodl https://t.co/Qzm7VxDYkU


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What exit strategy? #cryptocurrency #capitulation #blockchain #btc #bitcoin https://t.co/BR6Qnjqbpn


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RT @bajodayo: #education is the key and even the best when focused on prevailing needs with a certain future requirement. @Jelurida Sponsor…


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RT @bajodayo: Still representing @Jelurida the major Sponsor for the #Campus #blockchain #hackathon at #KWASU Day 2: Today we welcome ide…


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Nxter News | Ноябрь 2018 (II)

Nxter News | Ноябрь (II) Где бы ни работали умные люди, ... Read more The post Nxter News | Ноябрь 2018 (II) appeared first on NXTER.ORG.

Nov. 20, 2018, 9:08 a.m.
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See my article about the latest innovation in #Ardor #lightweightcontracts which would be available in one of our n… https://t.co/YBXq12AcjB


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Hashed Secrets to the Rescue

Prevent an Ardor Contract from Locking User FundsHashed Secrets — Jared Rice on UnsplashExecutive summaryLightweight contracts will never lock user funds when used correctly.IntroductionStarting a large software development project is always associated with a lot of risk and uncertainty. When we started working on Ardor back in 2016 the risks were huge but we made it. Ardor was launched on mainnet by January 2018 as we promised with its first child chain Ignis implementing the features of the NXT blockchain and more. Ever since, we have been working on adding more functionality and utility to this amazing product.A wise person once told me, when you need to deliver a large software project, instead of spending several month on planning, simply start it. The relevant knowledge and experience you’ll gain in a week will prove much more useful than months of planning. And so we did this with the lightweight contracts project. However, one thing we didn’t know how to solve upfront was how to prevent a contract from locking user funds in case the contract runner failed (or didn’t want) to run the contract. As we previously discussed, lightweight contracts are not part of the consensus, only contract runner nodes, which choose to do so, will run them. But then as a user sending funds to a contract, how can I be sure that the contract will execute and not lock my funds? Now, we have a solution.You see, most smart contract frameworks don’t need to worry about locking user funds since contract running is part of the consensus. If a node does not run a contract when it should, the node is left on a fork. Historical fund locking incidents were a result of a bug in the contract itself, not in the execution framework. One notable example was the Ethereum Paritytech multisig contract, which was changed from a standalone status to a library when the devs forgot to remove the kill method.But this approach of requiring every node to execute every contract is clearly not scalable. So people came up with alternative ideas like Plasma which describes a method to move contract execution to child chains. Don’t be surprised if this sounds familiar to what we do in Ardor, great minds think alike, but then the Plasma designers run into the same issue, if not everyone is required to run a contract, how do you make sure that someone will run it at all and not just lock your funds? The plasma whitepaper mentions a mass-exit idea, in case someone acts maliciously on some child chain everyone can escape from it. We think this is a bad idea as it is complex to implement and simple to manipulate. Instead, our approach is different: we do not really send the funds to the contract account until the contract successfully runs.Solution — phasing by hashed secretOne great thing about Ardor is that we are building it on top of the rich functionality of NXT. We are not starting from scratch like so many of the other blockchain solutions. NXT already has a little known feature we call “phasing by hashed secret”. The idea is that a transaction is submitted together with a hash of a secret generated by a well known hash function. Balances (or other state changes) are only updated once the secret is revealed by a separate approval transaction. In case the secret is not revealed by a certain block height, the transaction remains in the blockchain but the balances are not updated. This functionality exists in NXT and has been running in production since 2015.Now we can leverage this small gem using Lightweight Contracts. The client funding the contract will specify a hash of a secret only they know. The contract, running based on this trigger transaction, will submit its own transaction using the same “hashed secret”. Once the client reveals the secret, both transactions will be applied together as one atomic operation. If the client decides not to reveal the secret, both transactions will remain in the blockchain but their balance changes will be ignored. Therefore, if the contract fails to run, the client won’t reveal the secret so when the phasing height is reached, its funds will be released. Simple local solution, no need for mass-exit or the like.Let’s see how this works in practice. The client defines an approval modal by a hash of a secret only it knows.Figure 1 — Define the Hashed SecretNow we can trigger a contract and phase the transaction by this secret hashFigure 2 — Hashed Secret Attached when Sending a Transaction to a ContractThe contract submits its own transaction using phasing by the same secret hash. It doesn’t know the secret, it only echoes the same hash of a secret provided by the trigger transaction.The client now reviews both transactions and approves them by revealing the hashed secret.Figure 3 — Approve Both Transactions by Revealing the Phased SecretAs a result both transaction balance changes are applied on the same block without risk of locking or manipulation.SummaryAn up-front design challenge of lightweight contracts was the risk of locking user funds. This risk is now mitigated using the original NXT “Phasing by Hashed Secret” functionality built into the contract execution framework.

Nov. 20, 2018, 8:34 a.m.
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Hashed Secrets to the Rescue

Prevent an Ardor Contract from Locking User FundsHashed Secrets — Jared Rice on UnsplashExecutive summaryLightweight contracts will never lock user funds when used correctly.IntroductionStarting a large software development project is always associated with a lot of risk and uncertainty. When we started working on Ardor back in 2016 the risks were huge but we made it. Ardor was launched on mainnet by January 2018 as we promised with its first child chain Ignis implementing the features of the NXT blockchain and more. Ever since, we have been working on adding more functionality and utility to this amazing product.A wise person once told me, when you need to deliver a large software project, instead of spending several month on planning, simply start it. The relevant knowledge and experience you’ll gain in a week will prove much more useful than months of planning. And so we did this with the lightweight contracts project. However, one thing we didn’t know how to solve upfront was how to prevent a contract from locking user funds in case the contract runner failed (or didn’t want) to run the contract. As we previously discussed, lightweight contracts are not part of the consensus, only contract runner nodes, which choose to do so, will run them. But then as a user sending funds to a contract, how can I be sure that the contract will execute and not lock my funds? Now, we have a solution.You see, most smart contract frameworks don’t need to worry about locking user funds since contract running is part of the consensus. If a node does not run a contract when it should, the node is left on a fork. Historical fund locking incidents were a result of a bug in the contract itself, not in the execution framework. One notable example was the Ethereum Paritytech multisig contract, which was changed from a standalone status to a library when the devs forgot to remove the kill method.But this approach of requiring every node to execute every contract is clearly not scalable. So people came up with alternative ideas like Plasma which describes a method to move contract execution to child chains. Don’t be surprised if this sounds familiar to what we do in Ardor, great minds think alike, but then the Plasma designers run into the same issue, if not everyone is required to run a contract, how do you make sure that someone will run it at all and not just lock your funds? The plasma whitepaper mentions a mass-exit idea, in case someone acts maliciously on some child chain everyone can escape from it. We think this is a bad idea as it is complex to implement and simple to manipulate. Instead, our approach is different: we do not really send the funds to the contract account until the contract successfully runs.Solution — phasing by hashed secretOne great thing about Ardor is that we are building it on top of the rich functionality of NXT. We are not starting from scratch like so many of the other blockchain solutions. NXT already has a little known feature we call “phasing by hashed secret”. The idea is that a transaction is submitted together with a hash of a secret generated by a well known hash function. Balances (or other state changes) are only updated once the secret is revealed by a separate approval transaction. In case the secret is not revealed by a certain block height, the transaction remains in the blockchain but the balances are not updated. This functionality exists in NXT and has been running in production since 2015.Now we can leverage this small gem using Lightweight Contracts. The client funding the contract will specify a hash of a secret only they know. The contract, running based on this trigger transaction, will submit its own transaction using the same “hashed secret”. Once the client reveals the secret, both transactions will be applied together as one atomic operation. If the client decides not to reveal the secret, both transactions will remain in the blockchain but their balance changes will be ignored. Therefore, if the contract fails to run, the client won’t reveal the secret so when the phasing height is reached, its funds will be released. Simple local solution, no need for mass-exit or the like.Let’s see how this works in practice. The client defines an approval modal by a hash of a secret only it knows.Figure 1 — Define the Hashed SecretNow we can trigger a contract and phase the transaction by this secret hashFigure 2 — Hashed Secret Attached when Sending a Transaction to a ContractThe contract submits its own transaction using phasing by the same secret hash. It doesn’t know the secret, it only echoes the same hash of a secret provided by the trigger transaction.The client now reviews both transactions and approves them by revealing the hashed secret.Figure 3 — Approve Both Transactions by Revealing the Phased SecretAs a result both transaction balance changes are applied on the same block without risk of locking or manipulation.SummaryAn up-front design challenge of lightweight contracts was the risk of locking user funds. This risk is now mitigated using the original NXT “Phasing by Hashed Secret” functionality built into the contract execution framework.Hashed Secrets to the Rescue was originally published in Hacker Noon on Medium, where people are continuing the conversation by highlighting and responding to this story.

Nov. 20, 2018, 8:34 a.m.
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TWITTER

We're in the middle of an #Ardor Online #Hackathon and it isn't too late to join. Build a project on the $ARDR… https://t.co/LedfonLhnZ


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Back to back meetings today with exchange developers, wallet developers, big data collection service and investors.… https://t.co/7kd0VYwnft


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The sixth clue for the #cryptocurrency #puzzle by @madfox1234 published by @Nxter_org is #NxterWordNoviii 6 - snaps… https://t.co/EwX4JlvwT8


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RT @veronicatorras: It was great to show @ArdorPlatform to #MIBers executives at #ISDI last week & help them understand why the #blockchain…


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Go #kwarabuild, #blockchainNigeria! https://t.co/3UsIskD9WB


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For #cryptocurrency aficionados, you do know that Hodlers of $NXT get 10% of new #tokens created by Nxt #Blockchain… https://t.co/bhTK1NuqU9


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RT @MobsVideo: Use the #udemycoupon code "ARDOR-CONTRACTS" to attend for FREE! #Ardor #SmartContract #Blockchain https://t.co/xV7z6i498p


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RT @bajodayo: I will be representing @Jelurida and presenting @ArdorPlatform at the #KWASU Campus #Blockchain #Hackathon. If, you are in or…


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The fourth clue for the #cryptocurrency themed #puzzle by @madfox1234 and published on is #NxterWordNoviii 4 - gene… https://t.co/NwAyTU5wa8


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RT @MobsVideo: #Mobs is the first #video #marketplace powered by #blockchain that allows smartphone users to easily create & monetize video…


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RT @AvdiuSazan: NXT stuck to its path to develop a blockchain-as-a-service platform, #Ardor building an active community of developers. In…


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Since the third clue for this weeks @Nxter_org by @madfox1234 is #NxterWordNoviii 3 - block, I was going to tell yo… https://t.co/nGoEBFBTI2


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Given n coins C1, C2, ... ,Cn using the same POW consensus hash function f, and total hashing power ΣH. Coin Ci is… https://t.co/LYGCf7waHV


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