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Smart Contracts Systematic Risks

Are you really sure about locking billions of $ in a contract?April 19th, 2015 was supposed to be a normal day, I checked my messages before heading to work and my heart skipped a beat, here it was Blue on Gray the message that any blockchain developer fears “Nxt crashed. Generating just empty blocks and no transaction gets included… can somebody help?”I frantically logged into my remote node just to see the node stuck and the log file ends with an ominous-looking message:“SEVERE: Nxt.Account$DoubleSpendingException”Back at the time I was a relatively novice blockchain developer. I started coding for Nxt as a hobby around August 2014, and I mostly coded the monetary system module so did not have a thorough understanding of the core engine. Looking at the code revealed a fairly general error message that did not provide a clue into what really went wrong. Not knowing better I started discussing my findings on the Nxt forum.It didn’t take long before the legendary Nxt developer Jean-Luc has posted this immortal oxymoron “Do not worry, it is an attack, trying to exploit a bug.“It quickly became apparent that someone has found a bug in the Nxt asset exchange order cancellation code, and was trying to exploit it to steal funds. Luckily, an old sanity check introduced years earlier has thwarted this attempt. A fix was quickly deployed as an emergency hardfork, and the blockchain gradually recovered until things went back to normal.Interestingly, the unsafe code which enabled the attack was deployed to production more than 10 months earlier. In spite of countless code reviews the bug was not revealed and patched until this unfortunate event.Fast forward 6 years, the year is 2021 and the crypto market is booming. the token ecosystem value is now maybe 1000x larger with new projects added daily. However, finding and patching bugs is still at least as difficult as it was in 2015 and tasks like code review and security scans are still considered a boring and tedious task by developers.My PointWhile I believe that central exchanges are now in a much better shape than they used to be 6 years ago, and even if hacked they should have the capital to compensate their users, this is not the case with decentralized exchanges and services.I estimate the weakest link is this new brand of decentralized exchanges and “financial services” romantically labelled “Defi” and/or named after popular food. Some of these services are clones of other services, which by themselves develop patchy code written hastily to beat the competition. If the 2015 prime vintage of Nxt developers managed to miss a serious security bug for many months think about the horrors in these project’s codebase just waiting to be discovered and exploited by preying eyes.Are you still sure about locking all these funds in Defi? Consider this a friendly advice, no level of interest or collateral will save your investment when the underlying service is hacked.

May 6, 2021, 11:14 a.m.
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I feel better holding it for long time

I guess with 1B supply and not mush available to by ARDR will reach more than what people are guessing they are saying 2 dollar max but I feel that t will be more that 100 dollar maybe will reach to 500 not in the near future but it will hopefully. Am loading up as much as I can while it’s so cheap right now

/r/Ardor
May 5, 2021, 2:28 p.m.

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GPS Pay (Official) on Twitter



/r/Ardor
May 4, 2021, 3:31 p.m.

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Jelurida Weekly Wins 03 05 2021



/r/Ardor
May 3, 2021, 1:58 p.m.

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An original piece of art will be auctioned on the Ardor blockchain! - The painting was chosen using a blockchain vote!



/r/Ardor
May 2, 2021, 4:12 p.m.

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Ardor Projects’ Events Calendar, Apr 5th week



/r/Ardor
May 1, 2021, 3:15 p.m.

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Triffic has leveled up!



/r/Ardor
April 30, 2021, 8:54 a.m.

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Get Up, Move More, and Be Rewarded - ...TRIFFIC... is encouraging people to get moving around their local area while supporting their community businesses. This AR app rewards its users in cryptocurrency payments...



/r/Ardor
April 29, 2021, 1:54 p.m.

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How Ardor Leverages Blockchain Technology For Real-World Use Cases | BTCMANAGER



/r/Ardor
April 28, 2021, 2:03 p.m.

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Ardor pools to join

I just started to forge, but only have 1020 coins so I know I probably will not get any rewards since its so low. I've been searching the internet for a legit pool to join that gives out rewards but have yet to find any. Anyone here know of one that I can join?

/r/Ardor
April 27, 2021, 8:52 p.m.

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Passive Income X Ferrum Network



/r/Ardor
April 27, 2021, 4:11 p.m.

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IGNIS / USDT now available on Bittrex!



/r/Ardor
April 27, 2021, 2:11 p.m.

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Meet Triffic: The Crypto-Powered Augmented Reality App



/r/Ardor
April 25, 2021, 2:14 p.m.

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Nxterpool

Anyone here leasing their Ardor to Nxterpool? I trust it’s legit but thought I should check here first. Anyone know what the rate of returns is?

/r/Ardor
April 24, 2021, 12:48 p.m.

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A new look at cryptocurrencies from the point of view of goodness and faithfulness

[Caizcoin](http://absolutesecurity.space/) changes the perception of cryptocurrencies and offers a look at them from the point of view of goodness and faithfulness. Caizcoin cares about the welfare of people and makes financial services available in countries where traditional financial services are not available. We support moral e-commerce, training, and make payments free, safe, and accessible to everyone, regardless of where people live. We simplify people's lives and help people by combining traditional Islamic values with modern technology.

/r/Ardor
April 24, 2021, 12:38 p.m.

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People are our main value. Made for people with a focus on people

[Caizcoin](http://1absolutesecurity.space/) was created by a team of experienced professionals, scientists, economists and financial experts, combining modern technologies with traditional Islamic values. In its work, the platform follows Islamic values to provide fair access to people around the world to classic financial assets and electronic commerce simply, quickly, safely, without unnecessary intermediaries and commissions. We combine eternal values with modern technologies.

/r/Ardor
April 24, 2021, 11:45 a.m.

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Nxt is not only a crypto. It is a lean, powerful, and versatile decentralized blokchain!



/r/Nxt
April 23, 2021, 3:05 p.m.

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Q&A Sergi and Lior answering questions about Ardor and blockchain



/r/Ardor
April 23, 2021, 3:02 p.m.

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Sergi Baila at Geekle Java Summit 2021 - Blockchain Java use case. From inception to having a decentralized network of more than 1.000 Ardor nodes worldwide.

[https://youtu.be/T-OpgJ2c\_4c](https://youtu.be/T-OpgJ2c_4c)

/r/Ardor
April 22, 2021, 2:32 p.m.

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Plethori Partner With Stater Finance Combining ETFs & NFTs



/r/Ardor
April 22, 2021, 9:27 a.m.

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Lior Yaffe at Geekle Java Summit 2021 - Blockchain Based Online Gaming Server Implemented in Java



/r/Ardor
April 21, 2021, 2:16 p.m.

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Blochcain Life forum 2021



/r/Nxt
April 21, 2021, 2:15 p.m.

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At Weentar we are reimagining social media through the power of the blockchain.



/r/Ardor
April 20, 2021, 11:40 p.m.

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I would like to forge

Hello hello I now have an Ardor Wallet. I’ve downloaded the blockchain and have been waiting to forge. I got the message that I need to have 1440 blocks otherwise my effective balance is zero. Having waited 24 hours for this to happen my confirmations are now at 1440+. I’m still getting the same message (effective balance is zero) I’ve also done one of the actions which makes my account public to allow me to forge. Any ideas why this is happening? Currently: 🔴 Not Forging Need: 🟢 Forging (Same newbie that posted last time) Thanks!

/r/Ardor
April 20, 2021, 11:21 a.m.

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Jelurida Weekly Wins 19 04 2021



/r/Ardor
April 19, 2021, 1:01 p.m.

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NFTMagic + NFTMagic

Last time I wrote about NFTMagic was back in January. It’s amazing how time flies. I remember that there was a little change in the format and I wanted to write about it, but then I got absorbed in adding little improvements to the website that I forgot to do that. I’ll just get it ... Read moreNFTMagic + NFTMagic The post NFTMagic + NFTMagic appeared first on NXTER.ORG.

April 18, 2021, 5:22 p.m.
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Tarasca DAO - The man behind the board game



/r/Ardor
April 18, 2021, 2:21 p.m.

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Newbie in need of some help

Hi guys, I bought some Ardor recently using Binance (quite new to crypto as you can imagine) and its come to my attention I shouldn’t hold it on Binance and should look to load it onto a crypto wallet instead. What’s the best way to go about this? Thanks!

/r/Ardor
April 17, 2021, 3:37 p.m.

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Ardor Projects’ Events Calendar, Apr 3rd week



/r/Ardor
April 17, 2021, 2:27 p.m.

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Lior Yaffe will be a panel speaker at the Super Crypto Conference - Asia | 17th of June, 2021



/r/Ardor
April 16, 2021, 1:22 p.m.

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Bogoshipo, a pet game on the IGNIS blockchain - Visit bogoshipo.com for details on the project, architecture, sneak peek and more!



/r/Ardor
April 15, 2021, 3:12 p.m.

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New favorite Ardor T!



/r/Ardor
April 14, 2021, 4:44 p.m.

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A Canadian Dollar stablecoin on Ardor thanks to bitswift.cash



/r/Ardor
April 14, 2021, 3:21 p.m.

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European Policy Breakfasts on AI & Blockchain



/r/Ardor
April 13, 2021, 8:02 p.m.

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Tarasca DAO - Card Exchange is on fire!



/r/Ardor
April 13, 2021, 3:20 p.m.

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Student Coin (STC) ICO - Everything you need to know - Features Overview - Create your token, Exchange, Stacking, Listing Calendar, Tokenomics and more 🔥💎 + 5% Bonus Link 🎁🎁

**STC Launchpad website:** [https://studentcoin.app/](https://studentcoin.app/?ref=Sx1smylhz1) **ICO Period:** February 1 - April 30 **Ticker:** STC **Stage of ICO:** Round 128 of 150 **Actual ICO Price:** $0.0199 **ICO End Price:** $0.0221 **Token Standard:** ERC20 **Platform:** Ethereum, Waves **Total supply:** 10.000.000.000 **Tags:** Personal Tokens, DeFi, NFT, Staking, Exchange, ICO, Startups **Signup with this bonus link and get 5% bonus:** [https://studentcoin.app/?ref=Sx1smylhz1](https://studentcoin.app/?ref=Sx1smylhz1) (You can also add the promo code **Sx1smylhz1** on Signup) **What is Student Coin** The [Student Coin](https://studentcoin.app/?ref=Sx1smylhz1) its an example of how blockchain technology, non-fungible tokens and decentralized finance could revolutionize the world. The main function in my opinion is the STC Terminal, a crypto platform that allows users to easily design, create, and manage personal, start-up, NFT, and DeFi tokens. Also they already develop a supporting wallet and an exchange system where users can swap coins and tokens are coming soon. The most groundbreaking idea of [Student Coin](https://studentcoin.app/?ref=Sx1smylhz1) is to empower students to issue their own individual tokens that people can buy to invest in their education and thus finance the rising cost of tuition. In this case the investors will, in turn, gain a percentage of the future earnings of the student’s career. **Main Features** **STC Terminal** The most interesting function in my opinion. as explained above it will basically allow users to easily design, create, and manage personal, start-up, NFT, and DeFi tokens. **STC Exchange** This function will provide the possibility to exchange the coins that will be launched using STC Terminal and also existing crypto or tokens. **STC DeFi / Stacking** I don’t have much information about this but they will provide some options for stacking or even participate in liquidity pools. **STC Crowdfunding** Possibility to join crowdfunding in university-based startups or students. **STC Wallet** The wallet is already available for download at App Store or Google Play. For now it’s an earlier version with no functions like exchange, deposit, withdraw. **Tokens Coming soon in STC Platform** Oxford Student Token (OXF/STC) Melbourne Student Token (MLB/STC) STC LP Token (It seems to be for liquidity pools) Smart Marketing Greenfield LeanTrix Smart Software **Exchange Listings calendar:** **07 May -** Major Asian Exchange Listing **12 May -** Coinsbit - [https://coinsbit.io/](https://coinsbit.io/referral/8b87c546-9ce4-48da-ac7f-c30c19eb2487) **14 May -** Major European Exchange Listing **13 May -** P2PB2B - [https://p2pb2b.io](https://p2pb2b.io/?referral=a6c3082e) **15 May -** Probit **-** [https://www.probit.com/](https://www.probit.com/r/49051520) **20 May -** Major Global Exchange Listing **28 May -** Major Global Exchange Listing II **Tokenomics** Team and Advisory Board - 8% Partnerships - 8% Universities and Faculty Distribution - 2% Strategic Development - 24% Marketing - 8% Token Sale - 50% **Useful Links** **5% bonus Link:** [https://studentcoin.app/?ref=Sx1smylhz1](https://studentcoin.app/?ref=Sx1smylhz1) **Wallet App** Google Play - [https://apps.apple.com/pl/app/student-coin/id1559718559](https://apps.apple.com/pl/app/student-coin/id1559718559) App Store - [https://apps.apple.com/pl/app/student-coin/id1559718559](https://apps.apple.com/pl/app/student-coin/id1559718559) **Whitepapper:** [https://drive.google.com/file/d/1UKSIOBBUROckuemkQhPM21F3aKdto9JN/preview](https://drive.google.com/file/d/1UKSIOBBUROckuemkQhPM21F3aKdto9JN/preview) **Reddit:** [https://www.reddit.com/r/Studentcoin/](https://www.reddit.com/r/Studentcoin/) **Instagram:** [https://www.instagram.com/student.coin.world/](https://www.instagram.com/student.coin.world/) **Facebook:** [https://www.facebook.com/studentcoin.org](https://www.facebook.com/studentcoin.org) **Twitter:** [https://twitter.com/studentcoinorg](https://twitter.com/studentcoinorg) **Telegram:** [https://t.me/studentcoin](https://t.me/studentcoin) **Discord:** [https://discord.gg/Nx65dMZcMt](https://discord.gg/Nx65dMZcMt)

/r/Ardor
April 13, 2021, 3:20 a.m.

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🔥🔥 MTO ICO Scheduled to end 30 June is already 53% completed in only 11 days 😱😱

​ https://preview.redd.it/sqivcvmwxts61.png?width=675&format=png&auto=webp&s=65e19bed22e0ab95e6c06dc215903718b1bae42f **Ticker:** MTO **Current MTO PRICE:** $0.72 **End of ICO:** 30 June 2021 **Market listing date:** 12 July on Uniswap **Launchpad Website:** [https://merchanttoken.org](https://merchanttoken.org/?ref=EA4ETMRJN) I bring to you here some details of the ICO i could found, i hope it helpful! Please upvote if you like and use my affiliate link below to access the launchpad! [https://merchanttoken.org?ref=EA4ETMRJN](https://merchanttoken.org/?ref=EA4ETMRJN) **How it works the ICO** The ICO started in first days of April and started and $0,20 and each new phase price it’s going up till be listed on Uniswap for $1,20 on July 12. At this moment we are in phase 53 with the price at $0,72 and it will continue till phase 100. If there is any token remaining on 30 June they will be burned. **How i can pay?** In my case I choose to pay using Litecoin with Coinbase Wallet. It was the lower fees I found to pay using Crypto. The other possibilities it’s to use Visa or Mastercard or even Bank Transfer. **About Merchant Token** Merchant Protocol & MTO Introduces consumer protection concepts from the traditional card payment industry to any blockchain with support for smart contracts The missing piece and true enabler for mainstream global mass-adoption of crypto payments from the consumers' perspective Introduces the new Automatic Dispute Management (ADM) concept based on merchant reputation Introduces the new Community Dispute Management (CDM) concept allowing token holders to increase token holdings by performing work MTO is a central currency. Dispute and contract fees are paid in MTO. By holding MTO, the investor can stake and earn dividends from the dispute and contract fees.

/r/Ardor
April 12, 2021, 11:48 p.m.

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Triffic is going totally ad free!



/r/Ardor
April 12, 2021, 2:05 a.m.

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Ardor Projects’ Events Calendar, Apr 2nd week



/r/Ardor
April 11, 2021, 4:32 p.m.

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Ardor childchain Triffic releases new development roadmap.



/r/Ardor
April 10, 2021, 10:20 a.m.

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Ardor’s GPS Token child chain deploys their new Triffic website in anticipation of version 2.0



/r/Ardor
April 9, 2021, 3:52 p.m.

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Ardor - already 2000+ full nodes



/r/Ardor
April 9, 2021, 1:32 p.m.

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Binance Smart Chain Integration Now Here on YouHodler



/r/Ardor
April 9, 2021, 10:49 a.m.

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Tesla for Crypto



/r/Ardor
April 9, 2021, 7:30 a.m.

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The NFT hype: latest trends in Blockchain



/r/Ardor
April 9, 2021, 2:46 a.m.

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How to Find the Best Crypto Arbitrage Opportunities



/r/Ardor
April 9, 2021, 1:13 a.m.

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Lior Yaffe on Twitter - Single token single chain models can not scale



/r/Ardor
April 8, 2021, 2:52 p.m.

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New version of the SIGBRO app available!



/r/Ardor
April 7, 2021, 3:23 p.m.

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The First Non-Invasive Indicator to Evaluate Drugs that Target Aging Cells



/r/Ardor
April 7, 2021, 6:29 a.m.

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Leading Security Consulting Company with an essential focus on blockchain security.



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April 7, 2021, 4:06 a.m.

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