Edge Reflections and Projections — Bitcoin 2014 to 2015 ...

2.11-9.11 Good Crypto Weekly Market Summary

2.11-9.11 Good Crypto Weekly Market Summary
Quick weekly news:
  • Porsche turns to Circularise’s blockchain to track plastics used in its vehicles.
  • Binance Uganda is shutting down, following the fate of its Jersey operation.
  • Hong Kong plans to ban retail investors from buying crypto.
Other notable events include:
- Over 4 million transactions totaling more than 2 billion yuan ($299 million) have been conducted using China’s digital yuan
- The U.S. government is suing for the forfeiture of thousands of bitcoins, totaling more than $1 billion, that it seized on Tuesday.
Also, be sure to check out top altcoin gainers and losers of the week!
Digital transfers
Over 4 million transactions totaling more than 2 billion yuan ($299 million) have been conducted using China’s digital yuan, Yi Gang, governor of the People’s Bank of China, said. Speaking at the Hong Kong Fintech Week conference on Monday, Yi said the COVID-19 crisis has also accelerated the need for contactless banking, creating challenges for central banks looking to balance consumer needs and safety. That said, the central banker also played down the prospect of an imminent launch, saying the digital yuan project is still in the early stages.
$1B BTC forfeiture
The U.S. government is suing for the forfeiture of thousands of bitcoins, totaling more than $1 billion, that it seized on Tuesday. These bitcoins are said by the U.S. Department of Justice to be connected with the Silk Road marketplace. The address holding the bitcoins has been dormant since 2015, when the coins were transferred to now defunct crypto exchange BTC-e. According to Bloomberg, authorities seized the funds from an unknown hacker who had gained access to the address. The BTC are now likely to be auctioned, reintroducing them to the market supply. Near equivalent amounts of bitcoin gold, bitcoin sv and bitcoin cash were also recovered from the address.

https://preview.redd.it/vwttlvoqi8y51.jpg?width=1200&format=pjpg&auto=webp&s=a04b790175ac9cafb09876d58af02b6fc082e98f
submitted by Kononenko_Ivan to GoodCrypto [link] [comments]

Madbyte News - October 1, 2020


What was Bitcoin's value over the last several years on October 1st? In 2012 it was super low at $11 USD, with the first halving only 2 months away. In 2013 it was at $127 and the Cyprus banking crisis hit the financial markets. Also, during 2013 was the first time Bitcoin passed the price of gold for a brief moment.
In 2014 it was valued at $387. By the end of the year it was given the title by The Guardian as the worst investment of the year. Mt.Gox exchange had failed and Ethereum did its ICO (Initial Coin Offering) and the silk road website was taken down. Tim Draper bought a good chunk of Bitcoins at auction and was predicting it to go to $10,000.
In 2015 it was lower at $238 but in 2016 the price was at $614 with the second halving having happened. During 2017 it reached a lofty $4404. 2017 also was when ICOs became popular with a few blockchain projects raising over $200 million. In 2018 Bitcoin was at $6601 and the ICO frenzy died. During 2019 it was $8334 and some exchanges continued to get hacked. Bakt opens futures trading and bitcoiners are talking about the third halving in 2020. And so today bitcoin is valued at about $10,600.
Most of those years saw massive changes up and down in value. For example, in 2013, there was a massive rise of 10,250% from $12 to $961 but in 2014 it dropped 52%. If you look at Bitcoin valuations from the October 1st lens it seems like a great time to buy especially after a halving.
We continue to see Bitcoin as the number one crypto for a portfolio even though almost every week we see another new cryptocurrency pop up. Some of them even hit the top 10 on Coinmarketcap very quickly. For example, UNI (Uniswap) is up over 2700% on Binance since it was listed on Sept.17, 2020. But history shows that most altcoins over the long term are not very successful.
Be careful of FOMO but happy investing, From the Madbyte Team.
-- In summary, Bitcoin, on October 1st was: 2020 - $10600 2019 - $8334 2018 - $6601 2017 - $4404 2016 - $614 2015 - $238 2014 - $387 2013 - $127 2012 - $11
submitted by cryptocronix to madbyte [link] [comments]

Want to know why NEM should be as popular as Ethereum? this will be bigger than any altcoins you see, here's why

Want to know why NEM should be as popular as Ethereum? this will be bigger than any altcoins you see, here's why

Altcoin Explorer: NEM (XEM), the Enterprise-Grade Blockchain Platform


https://preview.redd.it/5ogfihikwkg51.png?width=1300&format=png&auto=webp&s=099780e02777d16d4e2add64b249c46da1cd488b
Nestled among the top 40 cryptocurrencies by reported market cap, New Economy Movement — popularly known as NEM (XEM) – is a peer-to-peer (P2P), dual-layer blockchain smart contract platform written in one of the most influential programming languages, Java. NEM uses the proof-of-importance (POI) consensus algorithm that essentially values the tokens held and the activity conducted by the nodes on the blockchain network.
In this Altcoin Explorer, BTCManager delves deeper into the finer intricacies of the NEM blockchain protocol, including the project’s POI consensus algorithm, its native digital token XEM, and some of its real-world use-cases.
Without further ado, let’s get to the core of this high-performance distributed ledger technology (DLT) platform.

History of NEM

NEM was launched on March 31, 2015, with an aim to develop an enterprise-grade blockchain protocol that could circumvent the infamous trilemma of blockchain: scalability, speed, and privacy.
Operated by a Gibraltar-registered NEM Group, NEM is a fork-out version of the NXT blockchain. After the successful fork, the NEM community decided to build its ecosystem from the ground up and developed its own codebase to make the network more scalable and faster.
NEM’s insistence toward building its own tech infrastructure led to a DLT protocol that is unlike anything resembling other similar platforms.
Today, NEM ranks among the top go-to blockchain platforms for enterprises across the world, rivaling competing protocols including Ethereum (ETH), and TRON (TRX), among others.

NEM’s Proof-of-Importance (POI) Algorithm

Unlike Bitcoin’s (BTC) energy-intensive Proof-of-Work (PoW) and Ethereum’s yet-to-be-implemented Proof-of-Stake (PoS) consensus algorithm, NEM uses PoI consensus mechanism.
The PoI mechanism achieves consensus by incentivizing active user participation in the NEM network. This consensus infrastructure ensures an agile decentralized network by rewarding well-behaved nodes that not only possess a significant stake in the network but are also actively engaged in executing transactions to maintain the network’s robustness.
Specifically, each node in the network possesses an ‘Importance Score’ that impacts the number of times the said node can ‘Harvest’ the XEM altcoin.
Initially, when a user puts XEM tokens into their wallet, they are called ‘unvested coins.’ Over time, as the wallets start accumulating an increasing number of XEM and contribute to the network’s transaction volume, they start collecting importance scores. At the same time, the XEM tokens in these wallets change into ‘vested coins,’ provided that there are at least 10000 tokens in the wallet.
To put things into perspective, let’s take the help of a small example.
On day 1, Joe receives 50,000 XEM in his digital wallet. Now, with each passing day, the NEM network will ‘vest’ 10 percent of the tokens held by Joe. So, on day 2, 5,000 tokens held by Joe are vested into the network. On day 3, 10 percent of the remaining tokens – 15,000 XEM – get vested into the network, leaving Joe with 13,500 XEM, and so one. After a couple of days, Joe sees that the number of XEM vested by him has crossed the 10,000 coins threshold, thereby, making him eligible to seek rewards from the NEM blockchain for his contribution to vesting his tokens.
Close followers of blockchain projects would find the aforementioned network reward mechanism bear a close resemblance to the PoS consensus algorithm. However, it’s worthy of note that vesting coins is just one way of calculating a node’s importance score.
The NEM protocol also rewards nodes that are responsible for most activity on the network. In essence, this means that the higher the number of transactions executed by a node, the more likely it is to gain higher importance points. The balance between vesting XEM and network activity is an important metric to be maintained by NEM nodes as it directly impacts their likelihood of harvesting XEM.
NEM’s consensus algorithm does away with several issues plaguing the more energy-intensive protocols such as PoW. For instance, PoI does not necessarily require high-energy hardware to run the nodes. The decentralized nature of the algorithm means that almost any machine — irrespective of its tech configuration – can participate in the NEM ecosystem ensuring it remains decentralized.

NEM’s Native Digital Token — XEM

XEM, unlike the vast majority of other cryptocurrencies, isn’t mined or staked using Pow or PoS algorithms. Rather, as explained earlier, XEM is ‘harvested’ through the PoI algorithm which ensures a steady supply of the digital token without flooding the market and involving the risk of a dramatic crash in price.
Per data on CoinMarketCap, at the time of writing, XEM trades at $0.04 with a market cap of more than $382 million and a 24-hour trading volume of approximately $6.8 million. The coin reached its all-time high of $1.92 in January 2018.
A large number of reputable cryptocurrency exchanges trade XEM, including Binance, Upbit, OKEx, Bithumb, ProBit, among others. The digital token can be easily traded with BTC, ETH, and USDT trading pairs.
That said, if you wish to vest your XEM to partake in the maintenance of the NEM network and earn rewards, it is recommended you store your tokens in the official NEM Nano wallet for desktop and mobile OS. Only XEM tokens held in the official NEM Nano wallet are eligible for vesting.

NEM Use-Cases

To date, NEM has been deployed for various real-world applications with promising results.
In 2018, Ukraine launched a blockchain-based e-voting trial leveraging the NEM DLT platform.
At the time, Ukraine’s Central Election Commission – with the local NEM Foundation representation – estimated the test vote trial in each polling station could cost as low as $1,227. The organization’s Oleksandr Stelmakh lauded the efforts, saying that using a blockchain-powered voting mechanism would make it impossible for anyone to fiddle with the records. The Commission added that the NEM protocol presents information in a more user-friendly format for voters.
In the same year, Malaysia’s Ministry of Education launched an e-scroll system based on the NEM blockchain to tackle the menace of fake degrees. The University Degree Issuance and Verification System use the NEM blockchain which is interrogated upon scanning of a QR code printed on the degree certificate.
The Ministry added that one of the primary reasons for its decision to selected the NEM platform was its unique and cutting-edge features in managing traceability and authentication requirements.
On a recent note, the Bank of Lithuania announced that it would be issuing its NEM blockchain-powered digital collector’s coin (LBCoin) in July after the successful completion of its testing phase.

Final Thoughts

Summing up, NEM offers a wide array of in-house features that separate it from other blockchain projects in a space that is becoming increasingly congested. NEM’s creative PoI consensus algorithm is a fresh take on the PoS algorithm for performance enhancement. Further, the project’s newly launched enterprise-grade DLT solution, Symbol, offers a tremendous option to businesses to help them cut costs, reduce complexities, and streamline innovation.
NEM uses the Java programming language that makes it an easy project for developers to get involved with, unlike other projects such as Ethereum that use platform-specific programming languages like Solidity. The project’s tech infrastructure not only makes it less power-intensive compared to Bitcoin but also more scalable than its rival projects including Ethereum and NEO.
NEM’s tagline, “Smart Asset Blockchain, Built for Performance,” perfectly captures everything the project has to offer. Over the years, NEM’s active developer community has craftily addressed the notorious bottlenecks in the vast majority of blockchain solutions, The future looks promising for NEM as it continues to foster a trustless and blockchain-driven economy for tomorrow.
Source
submitted by charlesgwynne to CryptocurrencyICO [link] [comments]

Price Discovery in Bitcoin exchange

About thirty days ago I shared a chart on Price Discovery in this sub. There was a lot of interest in it and I promised to explain in detail a Bitcoin price discovery algorithm.. I do so in this post.
*this text post is a slightly shorter version of what I wrote in my blog.

TL;DR

I applied price discovery algorithms to 5 Min OHLCV data from Bitmex and CME contracts and Bitstamp, Coinbase, HitBTC, Kraken, Poloniex, Binance, and OkEx BTCUSD/BTCUSDT markets from March 2016 to May 2020. Some exciting results I got was:

Introduction

Price discovery is the overall process of setting the price of an asset. Price discovery algorithms identify the leader exchanges whose traders define the price. Two approaches are most famous for use in Price Discovery. Gonzalo and Granger (1995) and Hasbrouck (1995). But they assume random walk, and a common efficient price. I do not feel comfortable assuming random walk and common efficient price in Bitcoin Markets. So I used this little know method by De Blasis (2019) for this analysis. This work assumes that "the fastest price to reflect new information releases a price signal to the other slower price series." I thought this was valid in our market. It uses Markov Chains to measure Price Discovery. Without going into the mathematical details the summary steps used was:
De Blasis (2019) names this number Price Leadership Share (PLS). High PLS indicates a large role in price discovery. As the sum of the numbers is 1, they can be looked at as a percentage contribution. I recommend reading the original paper if you are interested to know more about the mathematical detail.

Data

Andersen (2000) argues that 5 Minute window provides the best trade-off between getting enough data and avoiding noise. In one of the first work on Bitcoin's Price Discovery, Brandvold et al. 2015 had used 5M window. So I obtained 5M OHLCV data using the following sources:
Futures data are different from other data because multiple futures contract trades at the same time. I formed a single data from the multiple time series by selecting the nearest contract until it was three days from expiration. I used the next contract when the contract was three days from expiration. This approach was advocated by Booth et al ( 1999 )

Analysis

I can't embed the chart on reddit so open this https://warproxxx.github.io/static/price_discovery.html
In the figure above, each colored line shows the total influence the exchange had towards the discovery of Bitcoin Price on that day. Its axis is on the left. The black line shows a moving average of the bitcoin price at the close in Bitfinex for comparison. The chart was created by plotting the EMA of price and dominance with a smoothing factor of 0.1. This was done to eliminate the noise. Let's start looking from the beginning. We start with a slight Bitfinex dominance at the start. When the price starts going up, Bitfinex's influence does too. This was the time large Tether printing was attributed to the rise of price by many individuals. But Bitfinex's influence wanes down as the price starts rising (remember that the chart is an exponential moving average. Its a lagging indicator). Afterward, exchanges like Binance and Bitstamp increase their role, and there isn't any single leader in the run. So although Bitfinex may have been responsible for the initial pump trades on other exchanges were responsible for the later rally.
CME contracts were added to our analysis in February 2018. Initially, they don't have much influence. On a similar work Alexandar and Heck (2019) noted that initially CBOE contracts had more influence. CBOE later delisted Bitcoin futures so I couldn't get that data. Overall, Bitmex and CME contracts have been averaging around 50% of the role in price discovery. To make the dominance clear, look at this chart where I add Bitmex Futures and Perp contract's dominance figure to create a single dominance index. There bitmex leads 936 of the total 1334 days (Bitfinex leads 298 days and coinbase and binance get 64 and 6 days). That is a lot. One possible reason for this might be Bitmex's low trading fee. Bitmex has a very generous -0.025% maker fee and price discovery tend to occur primarily in the market with smaller trading costs (Booth et al, 1999). It may also be because our market is mature. In mature markets, futures lead the price discovery.
Exchange bitmex_futures bitfinex coinbase bitmex okex binance cme bitstamp okcoin kraken poloniex
Days Lead 571 501 102 88 34 12 8 7 6 4 1
 Table 1: Days Lead 
Out of 1334 days in the analysis, Bitmex futures leads the discovery in 571 days or nearly 43% of the duration. Bitfinex leads for 501 days. Bitfinex's high number is due to its extreme dominance in the early days.
Exchange binance huobi cme okcoin bitmex_futures okex hitbtc kraken poloniex bitstamp bitfinex coinbase bitmex
Correlation 0.809190 0.715667 0.648058 0.644432 0.577147 0.444821 0.032649 -0.187348 -0.365175 -0.564073 -0.665008 -0.695115 -0.752103
 Table 2: Correlation between the close price and Exchange's dominance index 
Binance, Huobi, CME, and OkCoin had the most significant correlation with the close price. Bitmex, Coinbase, Bitfinex, and Bitstamp's dominance were negatively correlated. This was very interesting. To know more, I captured a yearwise correlation.
index 2016 2017 2018 2019 2020
0 bitfinex 0.028264 -0.519791 0.829700 -0.242631 0.626386
1 bitmex 0.090758 -0.752297 -0.654742 0.052242 -0.584956
2 bitmex_futures -0.011323 -0.149281 -0.458857 0.660135 0.095305
3 bitstamp 0.316291 -0.373688 0.600240 -0.255408 -0.407608
4 coinbase -0.505492 -0.128336 -0.351794 -0.410874 -0.262036
5 hitbtc 0.024425 0.486229 0.104912 -0.200203 0.308862
6 kraken 0.275797 0.422656 0.294762 -0.064594 -0.192290
7 poloniex 0.177616 -0.087090 0.230987 -0.135046 -0.154726
8 binance NaN 0.865295 0.706725 -0.484130 0.265086
9 okcoin NaN 0.797682 0.463455 -0.010186 -0.160217
10 huobi NaN 0.748489 0.351514 -0.298418 0.434164
11 cme NaN NaN -0.616407 0.694494 -0.012962
12 okex NaN NaN -0.618888 -0.399567 0.432474
Table 3: Yearwise Correlation between the close price and Exchange's dominance index
Price movement is pretty complicated. If one factor, like a dominant exchange, could explain it, everyone would be making money trading. With this disclaimer out of the way, let us try to make some conclusions. This year Bitfinex, Huobi, and OkEx, Tether based exchanges, discovery power have shown a high correlation with the close price. This means that when the traders there become successful, price rises. When the traders there are failing, Bitmex traders dominate and then the price is falling. I found this interesting as I have been seeing the OkEx whale who has been preceding price rises in this sub. I leave the interpretation of other past years to the reader.

Limitations

My analysis does not include market data for other derivative exchanges like Huobi, OkEx, Binance, and Deribit. So, all future market's influence may be going to Bitmex. I did not add their data because they started having an impact recently. A more fair assessment may be to conclude this as the new power of derivative markets instead of attributing it as the power of Bitmex. But Bitmex has dominated futures volume most of the time (until recently). And they brought the concept of perpetual swaps.

Conclusion

There is a lot in this data. If you are making a trading algo think there is some edge here. Someday I will backtest some trading logic based on this data. Then I will have more info and might write more. But, this analysis was enough for to shift my focus from a Bitfinex based trading algorithm to a Bitmex based one. It has been giving me good results.
If you have any good ideas that you want me to write about or discuss further please comment. If there is enough interest in this measurement, I can setup a live interface that provides the live value.
submitted by warproxxx to BitcoinMarkets [link] [comments]

Want to know why NEM should be as popular as Ethereum? this will be bigger than any altcoins you see, here's why

Want to know why NEM should be as popular as Ethereum? this will be bigger than any altcoins you see, here's why

Altcoin Explorer: NEM (XEM), the Enterprise-Grade Blockchain Platform


https://preview.redd.it/manbawoqvkg51.png?width=1300&format=png&auto=webp&s=fcbae1f067261326f11641bb9b18cd6f57616966
Nestled among the top 40 cryptocurrencies by reported market cap, New Economy Movement — popularly known as NEM (XEM) – is a peer-to-peer (P2P), dual-layer blockchain smart contract platform written in one of the most influential programming languages, Java. NEM uses the proof-of-importance (POI) consensus algorithm that essentially values the tokens held and the activity conducted by the nodes on the blockchain network.
In this Altcoin Explorer, BTCManager delves deeper into the finer intricacies of the NEM blockchain protocol, including the project’s POI consensus algorithm, its native digital token XEM, and some of its real-world use-cases.
Without further ado, let’s get to the core of this high-performance distributed ledger technology (DLT) platform.

History of NEM

NEM was launched on March 31, 2015, with an aim to develop an enterprise-grade blockchain protocol that could circumvent the infamous trilemma of blockchain: scalability, speed, and privacy.
Operated by a Gibraltar-registered NEM Group, NEM is a fork-out version of the NXT blockchain. After the successful fork, the NEM community decided to build its ecosystem from the ground up and developed its own codebase to make the network more scalable and faster.
NEM’s insistence toward building its own tech infrastructure led to a DLT protocol that is unlike anything resembling other similar platforms.
Today, NEM ranks among the top go-to blockchain platforms for enterprises across the world, rivaling competing protocols including Ethereum (ETH), and TRON (TRX), among others.

NEM’s Proof-of-Importance (POI) Algorithm

Unlike Bitcoin’s (BTC) energy-intensive Proof-of-Work (PoW) and Ethereum’s yet-to-be-implemented Proof-of-Stake (PoS) consensus algorithm, NEM uses PoI consensus mechanism.
The PoI mechanism achieves consensus by incentivizing active user participation in the NEM network. This consensus infrastructure ensures an agile decentralized network by rewarding well-behaved nodes that not only possess a significant stake in the network but are also actively engaged in executing transactions to maintain the network’s robustness.
Specifically, each node in the network possesses an ‘Importance Score’ that impacts the number of times the said node can ‘Harvest’ the XEM altcoin.
Initially, when a user puts XEM tokens into their wallet, they are called ‘unvested coins.’ Over time, as the wallets start accumulating an increasing number of XEM and contribute to the network’s transaction volume, they start collecting importance scores. At the same time, the XEM tokens in these wallets change into ‘vested coins,’ provided that there are at least 10000 tokens in the wallet.
To put things into perspective, let’s take the help of a small example.
On day 1, Joe receives 50,000 XEM in his digital wallet. Now, with each passing day, the NEM network will ‘vest’ 10 percent of the tokens held by Joe. So, on day 2, 5,000 tokens held by Joe are vested into the network. On day 3, 10 percent of the remaining tokens – 15,000 XEM – get vested into the network, leaving Joe with 13,500 XEM, and so one. After a couple of days, Joe sees that the number of XEM vested by him has crossed the 10,000 coins threshold, thereby, making him eligible to seek rewards from the NEM blockchain for his contribution to vesting his tokens.
Close followers of blockchain projects would find the aforementioned network reward mechanism bear a close resemblance to the PoS consensus algorithm. However, it’s worthy of note that vesting coins is just one way of calculating a node’s importance score.
The NEM protocol also rewards nodes that are responsible for most activity on the network. In essence, this means that the higher the number of transactions executed by a node, the more likely it is to gain higher importance points. The balance between vesting XEM and network activity is an important metric to be maintained by NEM nodes as it directly impacts their likelihood of harvesting XEM.
NEM’s consensus algorithm does away with several issues plaguing the more energy-intensive protocols such as PoW. For instance, PoI does not necessarily require high-energy hardware to run the nodes. The decentralized nature of the algorithm means that almost any machine — irrespective of its tech configuration – can participate in the NEM ecosystem ensuring it remains decentralized.

NEM’s Native Digital Token — XEM

XEM, unlike the vast majority of other cryptocurrencies, isn’t mined or staked using Pow or PoS algorithms. Rather, as explained earlier, XEM is ‘harvested’ through the PoI algorithm which ensures a steady supply of the digital token without flooding the market and involving the risk of a dramatic crash in price.
Per data on CoinMarketCap, at the time of writing, XEM trades at $0.04 with a market cap of more than $382 million and a 24-hour trading volume of approximately $6.8 million. The coin reached its all-time high of $1.92 in January 2018.
A large number of reputable cryptocurrency exchanges trade XEM, including Binance, Upbit, OKEx, Bithumb, ProBit, among others. The digital token can be easily traded with BTC, ETH, and USDT trading pairs.
That said, if you wish to vest your XEM to partake in the maintenance of the NEM network and earn rewards, it is recommended you store your tokens in the official NEM Nano wallet for desktop and mobile OS. Only XEM tokens held in the official NEM Nano wallet are eligible for vesting.

NEM Use-Cases

To date, NEM has been deployed for various real-world applications with promising results.
In 2018, Ukraine launched a blockchain-based e-voting trial leveraging the NEM DLT platform.
At the time, Ukraine’s Central Election Commission – with the local NEM Foundation representation – estimated the test vote trial in each polling station could cost as low as $1,227. The organization’s Oleksandr Stelmakh lauded the efforts, saying that using a blockchain-powered voting mechanism would make it impossible for anyone to fiddle with the records. The Commission added that the NEM protocol presents information in a more user-friendly format for voters.
In the same year, Malaysia’s Ministry of Education launched an e-scroll system based on the NEM blockchain to tackle the menace of fake degrees. The University Degree Issuance and Verification System use the NEM blockchain which is interrogated upon scanning of a QR code printed on the degree certificate.
The Ministry added that one of the primary reasons for its decision to selected the NEM platform was its unique and cutting-edge features in managing traceability and authentication requirements.
On a recent note, the Bank of Lithuania announced that it would be issuing its NEM blockchain-powered digital collector’s coin (LBCoin) in July after the successful completion of its testing phase.

Final Thoughts

Summing up, NEM offers a wide array of in-house features that separate it from other blockchain projects in a space that is becoming increasingly congested. NEM’s creative PoI consensus algorithm is a fresh take on the PoS algorithm for performance enhancement. Further, the project’s newly launched enterprise-grade DLT solution, Symbol, offers a tremendous option to businesses to help them cut costs, reduce complexities, and streamline innovation.
NEM uses the Java programming language that makes it an easy project for developers to get involved with, unlike other projects such as Ethereum that use platform-specific programming languages like Solidity. The project’s tech infrastructure not only makes it less power-intensive compared to Bitcoin but also more scalable than its rival projects including Ethereum and NEO.
NEM’s tagline, “Smart Asset Blockchain, Built for Performance,” perfectly captures everything the project has to offer. Over the years, NEM’s active developer community has craftily addressed the notorious bottlenecks in the vast majority of blockchain solutions, The future looks promising for NEM as it continues to foster a trustless and blockchain-driven economy for tomorrow.
Source
submitted by charlesgwynne to ico [link] [comments]

Altcoin Explorer: NEM (XEM), the Enterprise-Grade Blockchain Platform

Altcoin Explorer: NEM (XEM), the Enterprise-Grade Blockchain Platform

https://preview.redd.it/f82bxncaxkg51.png?width=1300&format=png&auto=webp&s=34afde717d1781f7e472c8dcacd18a8b9390a78d
Nestled among the top 40 cryptocurrencies by reported market cap, New Economy Movement — popularly known as NEM (XEM) – is a peer-to-peer (P2P), dual-layer blockchain smart contract platform written in one of the most influential programming languages, Java. NEM uses the proof-of-importance (POI) consensus algorithm that essentially values the tokens held and the activity conducted by the nodes on the blockchain network.
In this Altcoin Explorer, BTCManager delves deeper into the finer intricacies of the NEM blockchain protocol, including the project’s POI consensus algorithm, its native digital token XEM, and some of its real-world use-cases.
Without further ado, let’s get to the core of this high-performance distributed ledger technology (DLT) platform.

History of NEM

NEM was launched on March 31, 2015, with an aim to develop an enterprise-grade blockchain protocol that could circumvent the infamous trilemma of blockchain: scalability, speed, and privacy.
Operated by a Gibraltar-registered NEM Group, NEM is a fork-out version of the NXT blockchain. After the successful fork, the NEM community decided to build its ecosystem from the ground up and developed its own codebase to make the network more scalable and faster.
NEM’s insistence toward building its own tech infrastructure led to a DLT protocol that is unlike anything resembling other similar platforms.
Today, NEM ranks among the top go-to blockchain platforms for enterprises across the world, rivaling competing protocols including Ethereum (ETH), and TRON (TRX), among others.

NEM’s Proof-of-Importance (POI) Algorithm

Unlike Bitcoin’s (BTC) energy-intensive Proof-of-Work (PoW) and Ethereum’s yet-to-be-implemented Proof-of-Stake (PoS) consensus algorithm, NEM uses PoI consensus mechanism.
The PoI mechanism achieves consensus by incentivizing active user participation in the NEM network. This consensus infrastructure ensures an agile decentralized network by rewarding well-behaved nodes that not only possess a significant stake in the network but are also actively engaged in executing transactions to maintain the network’s robustness.
Specifically, each node in the network possesses an ‘Importance Score’ that impacts the number of times the said node can ‘Harvest’ the XEM altcoin.
Initially, when a user puts XEM tokens into their wallet, they are called ‘unvested coins.’ Over time, as the wallets start accumulating an increasing number of XEM and contribute to the network’s transaction volume, they start collecting importance scores. At the same time, the XEM tokens in these wallets change into ‘vested coins,’ provided that there are at least 10000 tokens in the wallet.
To put things into perspective, let’s take the help of a small example.
On day 1, Joe receives 50,000 XEM in his digital wallet. Now, with each passing day, the NEM network will ‘vest’ 10 percent of the tokens held by Joe. So, on day 2, 5,000 tokens held by Joe are vested into the network. On day 3, 10 percent of the remaining tokens – 15,000 XEM – get vested into the network, leaving Joe with 13,500 XEM, and so one. After a couple of days, Joe sees that the number of XEM vested by him has crossed the 10,000 coins threshold, thereby, making him eligible to seek rewards from the NEM blockchain for his contribution to vesting his tokens.
Close followers of blockchain projects would find the aforementioned network reward mechanism bear a close resemblance to the PoS consensus algorithm. However, it’s worthy of note that vesting coins is just one way of calculating a node’s importance score.
The NEM protocol also rewards nodes that are responsible for most activity on the network. In essence, this means that the higher the number of transactions executed by a node, the more likely it is to gain higher importance points. The balance between vesting XEM and network activity is an important metric to be maintained by NEM nodes as it directly impacts their likelihood of harvesting XEM.
NEM’s consensus algorithm does away with several issues plaguing the more energy-intensive protocols such as PoW. For instance, PoI does not necessarily require high-energy hardware to run the nodes. The decentralized nature of the algorithm means that almost any machine — irrespective of its tech configuration – can participate in the NEM ecosystem ensuring it remains decentralized.

NEM’s Native Digital Token — XEM

XEM, unlike the vast majority of other cryptocurrencies, isn’t mined or staked using Pow or PoS algorithms. Rather, as explained earlier, XEM is ‘harvested’ through the PoI algorithm which ensures a steady supply of the digital token without flooding the market and involving the risk of a dramatic crash in price.
Per data on CoinMarketCap, at the time of writing, XEM trades at $0.04 with a market cap of more than $382 million and a 24-hour trading volume of approximately $6.8 million. The coin reached its all-time high of $1.92 in January 2018.
A large number of reputable cryptocurrency exchanges trade XEM, including Binance, Upbit, OKEx, Bithumb, ProBit, among others. The digital token can be easily traded with BTC, ETH, and USDT trading pairs.
That said, if you wish to vest your XEM to partake in the maintenance of the NEM network and earn rewards, it is recommended you store your tokens in the official NEM Nano wallet for desktop and mobile OS. Only XEM tokens held in the official NEM Nano wallet are eligible for vesting.

NEM Use-Cases

To date, NEM has been deployed for various real-world applications with promising results.
In 2018, Ukraine launched a blockchain-based e-voting trial leveraging the NEM DLT platform.
At the time, Ukraine’s Central Election Commission – with the local NEM Foundation representation – estimated the test vote trial in each polling station could cost as low as $1,227. The organization’s Oleksandr Stelmakh lauded the efforts, saying that using a blockchain-powered voting mechanism would make it impossible for anyone to fiddle with the records. The Commission added that the NEM protocol presents information in a more user-friendly format for voters.
In the same year, Malaysia’s Ministry of Education launched an e-scroll system based on the NEM blockchain to tackle the menace of fake degrees. The University Degree Issuance and Verification System use the NEM blockchain which is interrogated upon scanning of a QR code printed on the degree certificate.
The Ministry added that one of the primary reasons for its decision to selected the NEM platform was its unique and cutting-edge features in managing traceability and authentication requirements.
On a recent note, the Bank of Lithuania announced that it would be issuing its NEM blockchain-powered digital collector’s coin (LBCoin) in July after the successful completion of its testing phase.

Final Thoughts

Summing up, NEM offers a wide array of in-house features that separate it from other blockchain projects in a space that is becoming increasingly congested. NEM’s creative PoI consensus algorithm is a fresh take on the PoS algorithm for performance enhancement. Further, the project’s newly launched enterprise-grade DLT solution, Symbol, offers a tremendous option to businesses to help them cut costs, reduce complexities, and streamline innovation.
NEM uses the Java programming language that makes it an easy project for developers to get involved with, unlike other projects such as Ethereum that use platform-specific programming languages like Solidity. The project’s tech infrastructure not only makes it less power-intensive compared to Bitcoin but also more scalable than its rival projects including Ethereum and NEO.
NEM’s tagline, “Smart Asset Blockchain, Built for Performance,” perfectly captures everything the project has to offer. Over the years, NEM’s active developer community has craftily addressed the notorious bottlenecks in the vast majority of blockchain solutions, The future looks promising for NEM as it continues to foster a trustless and blockchain-driven economy for tomorrow.
Source
submitted by charlesgwynne to BlockchainStartups [link] [comments]

Nano #Ama on Binance Spanish telegram group!!

Regards!! I'm Jesús Zambrano, member of the Hispanic community of NANO for a long time. Last thursday, we had an interesting and enjoying Ask-me-anything at Binance Spanish community on telegram with the people behind NANO, Colin LeMahieu (Founder and Executive Director) and Zach Hyatt (Proyect Manager), where we take advantage of their kindness and willingness to ask them some questions and share opinions about de currency. I will share a compilation of some of the questions and answers.
-(Admin) ¡Welcome Binancians to our following AMA!
I will explain how AMA works; we will have three (3) segments.
Segment #1: I am going to ask to our guests five (5) questions and then they will answer them.
I will be explaining the rest of the segments as we conclude one of them.
-(Admin) Today we have the great pleasure of having Colin (Founder and Executive Director) and Zach (Project Manager) with us in our chat room. Could you give us a little introduction about you?
- (Zach) Hi everyone, I am Zach Hyatt, the Project Manager at the Nano Foundation and am excited to help answer questions about Nano. I live in Austin, TX where it is quite hot right now!
-(Colin) I’m Colin LeMahieu, founder of Nano. I’m a computer engineer and I’ve worked at companies like Qualcomm, Dell, and AMD. I have been working on Nano for about 5 years now and I’m really excited to talk with people who are interested as well!
-(Admin) It is a pleasure for us to have you here, I have to say that on a personal level, I have been a follower of the project for a long time now, so it is incredible for me to be able to count on you tonight, we will start with segment # 1, with the questions I have for you.
Feeless transactions and in record time! What is NANO? Can you give us an introduction to the project?
-(Colin) Nano’s goal is to solve problems with other cryptocurrencies and make sending value fast and fee-less. It has a unique design to allow us to accomplish this. We want people to have the option of using decentralized digital money instead of fiat money anywhere in the world. Nano is accessible and easy-to-use today and we plan on keeping it focused on these goals.
-(Admin) Thank you for answering my first question, I am delighted with the features offered by the project, every week they are updating and making important changes that help to improve the ecosystem that surrounds the team.
Here you can find all the weekly updates: https://nano.org/en
Previously the project was called RaiBlocks, it appeared for the first time in an ad in Bitcoin Talk in 2015. Can you tell us why a name change came up later?
-(Zach) Yeah, absolutely. Although the original RaiBlocks name has a special place in our history, it was difficult to pronounce in some areas of the world and caused confusion with certain users. We decided to move to a shorter name that not only was easy to pronounce but also reflected the fast, efficient nature of the protocol.
-(Admin) A short and quick name to pronounce, definitely NANO is perfect to define it!
My third question is the following; I had seen a very interesting gif early in the chat and it is just about the question that I came to ask.
Currently, NANO has 100% of its tokens in circulation and these tokens were distributed through Faucets, so it meant that any user with a computer could get coins simply by completing some captchas, can you tell me which has been the experience of users when using this method?
-(Colin) The faucet was a great way for us to distribute coins to people who have never used it before. Cryptocurrencies that use mining end up distributing only to people who have money to buy the mining hardware and this is unfair. We had a lot of people from Indonesia and Asia in the beginning of our distribution and at the end there were a lot of people from South America, Venezuela and Brasil that were getting most of the Nano from the faucet. We think this was a fairer way to do it and it got Nano into the hands of people in different locations, and it had a very positive impact on their lives.
-(Admin) This is incredible! thanks for your answer!
Can you tell us about what the Open Representative Vote is about and how it protects the network?
-(Zach) Nano uses voting to get confirmation on the network instead of mining and the nodes on the network that create votes are called Representatives. Open Representative Voting allows people who have a Nano balance to pick whatever representative they want to vote on their behalf. This allows the people who hold Nano to decide who generates consensus instead of mining companies. The voting process is very efficient and is a big part of what allows Nano to be fee-less and use very little energy.
-(Admin) Very good! The last question on my part:
Nano PoW is your new approach, I have read a pretty interesting example with emails, can you explain what it is about?
-(Colin) Nano PoW is a research project we’re doing in order to create a proof of work algorithm that uses less energy than other popular algorithms. Since Nano is fee-less, there must be a method to limit transactions going onto the network, which this PoW achieves. With the goal of using more memory in the process instead of CPU cycles in order to generate proofs, this new Nano PoW will help prevent ASICs from being able to cheaply send lots of transactions. It’s important for a cryptocurrency that’s used around the world to be energy efficient and green so continuing our research on this is important to us.
-(Admin) https://medium.com/nanocurrency/nano-pow-the-details-ba22a9092d6f
Thanks for your answers, Colin and Zach! I have a video, taken from your YouTube account that I would like to share with the community
https://www.youtube.com/watch?v=eh9pA8UCUrI
Can you tell me what we see in this video?
-(Colin) This is a video of how fast our transactions send and receive. You can see it takes less than 1 second to finish which means you can use it as a currency.
- (Zach) The wallet was made by developers in our amazing community, it is called Natrium. It really shows how fast Nano is and how it is easy-to-use!
-(Colin) You can also see how simple it is to use. You just scan, enter an amount, and send. There are no complicated setting which is great for new users and great for adoption.
- (Zach) And the best part is, there were no fees at all for that transaction. In fact there have never been any transaction fees on the Nano network ever!
-(Admin) Great! That's why I wanted to share it with everyone, yesterday I could try the wallet and it is really spectacular to use, thank you very much for that excellent explanation, please stay with us, now comes the part in which our users participate
Segment 3, community questions
Q -First congratulations on your project, it is amazing. Now, does nano BlockChain have another use besides making transactions?
A - (Zach) Thank you! Nano has always been focused on transfer of value and will continue to maintain that focus. The overall design is aimed at doing only this so it can remain fast, efficient and fee-less.
Q -Good evening! I understand that thanks to its architecture called "Block-lattice", each individual provides the computing power necessary to verify their own transaction, thanks to this they do not use miners to confirm transactions and they do not apply commissions of any kind. My question is: How did this occur and how difficult was it?
A - (Colin) It’s simila, transactions are validated by votes from the representatives, not by the PoW. The PoW is a way to slow down how fast people can create transactions so they can’t spam the network.
Q - Do you have any short or long term projects so that transactions using $NANO were anonymous?
A - (Colin) Long term we want to see what privacy options exist and are fast. Most privacy schemes make the transactions very big or slow to process and it’s important for things to remain quick and efficient so we can have fast transactions.
Q - We are living in Venezuela many changes in the cryptocurrency sector, the integration of crypto for service payment and product purchases is already a reality. What agreements has NANO made with service stores to integrate it as a means of payment? I want to pay my movie ticket with NANOS
A - (Zach) Thanks for your interest in Nano. We are always looking for ways to allow everyone to use Nano in as many places as possible. Although separate from our organization, we are aware of the efforts of the Nano Venezuela organization and try to support them when possible in bringing Nano to as many people and stores in Venezuela as possible.
Q - (7 questions made from one persone at once)
  1. How do you manage to make your transactions virtually instantaneous?
  2. How do they create part of the company's livelihood if no fees are charged for transactions?
  3. Why does $ NANO consume so little electricity?
  4. Requirements for a medium-sized company to adopt nano correctly as a means of payment?
  5. Since 100% of the $ NANOS are distributed, I have seen something in Medium that talked about `` Nano PoW '', could you tell me a little more about how it works? What profit will the person / institution get that puts hardware for their PoW? Will more $ NANO be created apart from those already in circulation?
  6. What do the representatives earn for putting their vote and validating blocks if 100% of the $ NANOS are already created / issued?
7- Since your policy / slogan / commandment is to be a cryptocurrency without fees, shouldn't you force exchanges in which $ NANO is present that they don't charge withdrawal fees?
A - (Colin)
  1. Transactions are fast because they’re validated by voting. The votes get transmitted around the world in milliseconds and all people have to do is count votes to confirm the transaction.
  2. We use the Dev fund to pay for developing the Nano protocol. The Nano protocol is a free tool that other people can build businesses on. We have ideas for businesses that can use fast, free money in order to help people send money to their family in other countries or pay microtransactions. It’s similar to Linux, it’s free but big companies use it because it saves them money.
  3. Nano uses little electricity because we use voting for validating transactions. Voting is just sending data over the internet which is power efficient.
  4. You can run a nano node with 40-60$/mo using cloud virtual machines
  5. Nano pow is just a more efficient way to slow people down from sending transactions to the network
  6. The most important thing is: why does a company want to use cryptocurrency? They want to use it because it saves them money on bank fees, etc. Since 40-60$/mo running a node is less expensive than their bank fees, they want to participate in the network to keep it going and save them money.
Q - Knowing all this about Nano, could you say that Nano is one of the most energy-efficient, Ecological friendly currencies in existence?
A -(Zach) Absolutely. We care about making a positive change in the world and so pride ourselves on leaving as little energy trace possible in the world. It may just be the fastest, most efficient transfer of value available.
Q - If the nano protocol had not passed the Red4Sec signature security test, would it have any vulnerability today?
A - (Colin) The Red4Sec audit didn’t find any critiral vulnerabilities in Nano. In fact they did the audit twice because they couldn’t find anything wrong and that never happened before.
It’s important for us to keep the code high quality and we will do audits again in the future because it’s important to make sure everything is secure.
Q - I'd like to see more development of Nano by using SMS on our phones to avoid the problem of no Internet connection at the moment
A -(Zach) As much as we like the idea of SMS, unfortunately it is not a secure network so managing Nano transactions over it brings some unique requirements. However we are always innovating and trying to make Nano as easy and accessible as possible so hope advances can help over time make it more accessible in this area.
Q - What plans do you have to close this 2019 to increase adoption in Latin America?
A -(Colin) We are very excited about the passion we see in the south american community. We would love to make it down to VE however in the mean time follow nanoVE for updates and meetups - there may be one near you soon!
Q - How will you make the adoption and use of $ NANO continue to increase especially in markets where other cryptocurrencies are gaining more ground?
A - (Colin) Our focus is to build tools people need to accept cryptocurrency. Right now it’s still difficulty and expensive. One thing we’re making is the device Appia which can accept cryptocurrency similar to a credit card. We made this device very inexpensive and can connect over wireless so it can be used in markets or resturaunts or other places cryptocurrency is not yet available.
- (Admin) Thank you very much for your answers! You are the first guests that answer all the questions of our users, you are amazing guys!
@AndyNano It was amazing to meet you, I learned a lot from you
@FundacionNanoVE Thanks for making this happen! excellent work
@nano_isam Thanks for everything buddy!
-(Zach) Can we ask a question to the channel?
What are the top things Nano can do to help you in your daily lives?
-(Colin) My question: How do you store cryptocurrency safely? Where do you back up your seed so it isn’t lost or stolen?
A - In Venezuela we currently have a problem with conventional payment processors, they are very slow, it would be great to be able to see people using NANO to make their purchases at any store in Venezuela, 0 commissions and instant transactions, is what we need
A - Fast transactions are what can help society the most, and except that, the best thing is that it is very cheap ... from there it is addition, those are the main characteristics that we look for the most
A - encrypted file in a pendrive
A - Nano is a direct competition to the vast majority of Cryptos, in transaction speed and that it is literally free to send or receive, nothing to wait for 5 hours or the next day when you pay for items or services with Crypto, let's increase the adoption of nano!
-(Colin) Question: Are there barriers to using Nano in your country right now?
A - No barriers in Venezuela
A - No barrier what is lacking is greater diffusion in means to give greater projection and that the adoption arrives. Here I am to support NANO!
A - There should be no barriers to the payments we wish to make, freedom above all
-(Colin) Fantastic!
- (Zach) Thanks everyone, I have to go but I appreciate all the awesome questions and answers!
submitted by AlejandroZD58 to nanocurrency [link] [comments]

AMA Recap of CEO and Co-founder of Chromia, Henrik Hjelte in the @binancenigeria Telegram group on 03/05/2020.

Moh (Binance Angel)🇳🇬,
Please join me to welcome, “CHROMIA CEO & Co-founder, Henrik Hjelte” and “ CMO, Serge lubkin”
Oh, before we proceed, kindly introduce yourselves and tell us a bit about your roles at Chromia u/sergelubkin & u/henrik_hjelte.
Henrik Hjelte,
Ok, I’m Henrik, I’m CEO of ChromaWay that crated the Chromia project. My background is a bit mixed: developer for 30+ years (since 80: s), but I studied other things at university (economics, politics, social sciences philosophy). Life is more than computer you know… I worked with FInance/IT then started a web startup and got to know Alex Mizrahi who worked as a developer….
Web startup didn’t fly, but Alex showed me bitcoin. When I finally read the whitepaper I was blown away, and joined Alex colored-coins project, the first open source protocol to issue tokens. in 2013.
So, we started with open-source tokens (that kickstarted the blockchain industry. Then started company together 2014.
That is a long intro, I’ll shut up now… Thanks….
Serge,
I’m Serge, I’m assisting Henrik today and I work with Chromia marketing team as well as on some business development projects
Moh (Binance Angel)🇳🇬, , Question No 1 :
Kindly describe the CHROMIA project and what it aims to achieve?
Henrik Hjelte,
Chromia is a new public blockchain based on the idea of integrating traditional databases, Relational databases with blockchain security. Chromia is a general purpose blockchain with full smart contract capabilities, just that it is a lot easier to code, even complex applications. You code with an easy to learn new programming language that combines the power of SQL and normal languages but makes it secure in a blockchain context. Up to 1/10 the code-lines vs other blockchains. There is a blog post about it, I’ll share later. On lines of code.
The aim of Chromia is to combine relational databases, which exist in every kind of organization, together using blockchains. We want to provide a platform for our users to develop totally decentralized apps securely. Our goal is for Chromia to be seen as the number one infrastructure for decentralized applications.
https://blog.chromia.com/reasons-for-rell-compactness/
Moh (Binance Angel)🇳🇬,Question No 2:
What inspired the CHROMIA Core team to pick interest in CHROMIA project? what breakthrough have you achieved so far? what are the present challenges you’re facing and how are you planning to overcome them?
Henrik Hjelte,
We started with public blockchains, tokens in 2012, the world’s first stable coin with a bank 2015 (LHV). When coding that solution, peer to peer payments of Euro-tokens, we discovered we need performance reasons to store all data in a database. We needed to quickly know the “balance” of a user, and can’t loop through a blockchain. And slowly the idea grew that we can make the database INTO a blockchain, integrate completely with the transaction mechanism of a database. So, we did it as a private blockchain first (Postchain), used it for some projects, then came up with the idea to make a Public Blockchain based on it.
The motivation is that we felt we needed a better programming model for blockchains. Our CTO Alex has always been thinking of optimal solutions for blockchain technology and has lots of experiences thinking about it. Also: make real-world useful things. For example, we support free-to-play models since users do not need to own “our” token to USE apps, the application itself (often the developer) pays for hosting. And of course, great performance. Also: more knowledge of who runs nodes and risk level. So, it is more suitable for enterprises.
In Chromia the application (at the start the developer) decides Who should be allowed to run its own blockchain (every dapp has its own blockchain). You can also say on a higher level that we want to provide technology to create “Public applications”, a tool
that enables us to create a fairer world.
https://blog.chromia.com/towards-publicly-hosted-applications/
Moh (Binance Angel)🇳🇬, Question No 3 :
Why did you create your own blockchain instead of leveraging on existing and proven base layer protocol?
Henrik Hjelte,
None of the existing protocols are suitable to support large-scale, mainstream applications. We designed Chromia to give our users exactly what they want; fast support, useful features, with an affordable service cost. Other platforms do not have the ability to host data applications in a decentralized and secure way, as Chromia can. Chromia also has its own bespoke programming language that sets it apart from SQL-based platforms. It’s so easy to use, even non-developers can understand it!
The other big difference with Chromia concerns payments. Chromia gives its users freedom from having to pay for each transaction. With Chromia, you have the flexibility to decide how to set fees for your dapp
And when it comes to “proven base layer protocols”: they are just a few years at max. Chromia is built on top of Postgresql, that has been used in enterprises for decades, a really proven technology. And the Java virtual machine on top of that. This is proven tech, at core.
Moh (Binance Angel)🇳🇬, Question No 4 :
What is Postchain?
Henrik Hjelte,
Postchain is an open-source product of ChromaWay for enterprise clients and it’s the core technology on which Chromia is built.
Postchain is a replicated blockchain and database that offers highly resilient distributed database management with distributed control.
Postchain is the only product on the market that combines the immutable consensus of a blockchain and the properties of a real database management system (You know, the tech that built SAP, Facebook, Banks…) …
Postchain allows you to share information between companies and/or individuals in a secure and transparent way.
That is the low-level base of Chromia you can say
Moh (Binance Angel)🇳🇬,
Can you please name some of your clients that are using this service already?
Serge,
You mean products built on Postchain? Also, Stockholm Green Digital Finance, Green Assets Wallet that’s now functioning on Chromia Bootstrap Mainnet.
Big financial institutions
It’s only a beginning of course, but very promising one. https://greenassetswallet.org/news/2019/12/12/launch-of-the-green-assets-wallet
Henrik Hjelte,
We got a lot of attention with the Swedish Land registry; we did a joint project between them and banks and a telco etc on postchain as base.
Then, right now we do a large project with the Inter-American Development bank also about land-registration (processes) in South America.
We had a client, Stockholm Green Digital Finance, that did a system for green bonds (tracking environmental impact. Yes, as Sege says, it was later moved to Chromia…
Which is cool. Also, another external development company did that phase of the project, proving that other can build on our tech,4irelabs from Ukraine is their name. Some companies using the GAW: Blackrock. SEB Bank etc…
Also, we have done more projects, in Australia, asia etc. Oh Daimler too (the Mercedes company) …
Moh (Binance Angel)🇳🇬,
Lots of enterprise clients you’ve got. No wonder I do see the meme “CHR=ETH KILLER”
Serge,
It’s a meme from our supporters. But we believe we can coexist:)
For some niche things eth is good :)
So, no killing :D
Henrik Hjelte,
We want to work with partners too for this, we can’t do all projects ourselves. Also, for Chromia projects, ChromaWay company can help do support maintenance etc. So, it is not competing, it adds value to the ecosystem.
Yeah ETH is good too, for some applications. We are friends with them from colored-coin times.
And colored-coins inspired ETH, and ETH inspires us.
Moh (Binance Angel)🇳🇬, Question No 5 :
Lastly, CHROMIA is already doing very well in terms of business. You just got listed on BINANCE JEX, you are on-boarding new clients and dishing out new features. But what’s next? Is there anything to be excited about?
Henrik Hjelte,
Plans for 2020 are to both release a series of dapps to showcase how fantastic Chromia is, as well as continue to develop the platform. And when it is secure and good enough, we will release the mainnet.
Dapps are now being made by us as well as others. We do a decentralized social network framework called Chromunity, now released to TestNet. It is really cool, users can vote over moderators, and in the future users might even govern the complete application, how it can be updated. This is a great showcase for Chromia and why we use the slogan Power to the Public.
https://testnet.chromunity.com/
Games coming are:
Mines of Dalarnia (by Workinman Interactive). An action game in a mine with blockchain rental of plots and stuff. Already on TestNet and you can take a peek on it at https://www.minesofdalarnia.com
more coming…
Krystopia 2, novas journey. A puzzle game done by Antler Interactive. Could only find trailer though: https://www.youtube.com/watch?v=-G95-Dw3kI4
However, we have even larger ambitions with blockchain gaming…
We are doing A secret demo-project that we do together with Antler to showcase the technical potential of Chromia platform.
Another exciting relase is an indie game Chain of Alliance, done by two external developers. It is a strategy game with full-logic on blockchain. Public release on TestNet on May 22!
More coming in 2020: Other dapps from other companies, one in impact-tech.
That is a serious app, Chromia also works outside gaming and social media for enterprises and startups
And I hope some of you will do something, we want to support dapps on the platform so reach out to us…
Moh (Binance Angel)🇳🇬,
When can we be expecting the mainnet? Any approximate time? I’m sure the community will really excited to have that info
Serge,
It’s now in Bootstap phase, so it’s technically already functioning. MVP will be very soon
Stay tuned;)
Twitter questions Vs answers
Ellkayy,
What’s the unique thing in Chromia that no other blockchain has, that makes you the better option?
Henrik Hjelte,
Unique: Chromia is the only blockchain that also has a real, proper database built-in. And blockchain is about managing data in a shared context. How to best managed data was solved in computer science already. So far, it is the relational algebra model that is used in 100% of all enterprises, and has an 85% market share. Chromia is the only blockchain that use that model and that power.
Ellkayy,
Why Chromia use RELL and not SQL or JavaScript? Can developers with other language knowledge use Chromia?
Serge,
Rell is the only language on the blockchain side. You can combine with anything on client-side, although now client only exists for JS/TS, C# and Java/Kotlin. Rell is a language for relational blockchain programming. It combines the following features:
1 Relational data modeling and queries similar to SQL. People familiar with SQL should feel at home once they learn the new syntax.
2 Normal programming constructs: variables, loops, functions, collections, etc.
3 Constructs which specifically target application backends and, in particular, blockchain-style programming including request routing, authorization, etc.
Rell aims to make programming as convenient and simple as possible. It minimizes boilerplate and repetition. At the same time, as a static type system it can detect and prevent many kinds of defects prior to run-time.
Roshan DV,
I have been monitoring your project for a while but some concerns about it: Your project will build your own core network, so you have more visibility than Ethereum and NEO. These are projects that were born before and which also have a very large community. And what can assure you that your project will guarantee the functionalities that you have defined?
Henrik Hjelte,
What came first? I want to remind that Vitalik was in the colored-coins project, led by our CTO and we had blockchain in production before ETH and NEO etc existed. We are the old dogs…
Large community: We are part of the same community. When developers are fustrated and want to try new tech, they go to us from other blockchains.
Also, we have a large potential: SQL (close to Rell and our tech) is the world top 3 language. Bigger than Java. Bigger than PHP. Only beaten bny HTML and javascript. Soliditiy is not on top 20 list. THere are millions of developers that know SQL. That is potential for community… (source is Stackoverflow annual programming survey).
Paul (Via Manage),
What are the utilities of Chromia and what purpose does the Chromia coin serve?
Serge,
Chromia meta-token called Chroma (CHR). It is used in Chromia to compensate block-producing nodes by fees. In Chromia, fees are paid by dapps, which can in their turn collect fees from users. Chromia provides mechanisms which balance the interests of developers and users. Dapp tokens can be automatically backed with Chroma, providing liquidity and value which is independent of investment into the dapp. Dapp investors can be compensated in Chroma through a profit-sharing contract. For developers, Chromia offers the opportunity to derive income from dapps. This incentivises the creation and maintenance of high quality dapps because better dapps generate more income and create more demand for tokens owned by the developer. The Chromia model is designed to support sustainable circular economies and foster a mutually beneficial relationship between developers, users, and investors.
Idemudia Isaac,
Thank you very much u/henrik_hjelte u/sergelubkin
You stated your plans for 2020 is to release series of dApps. What kind of large scale, mainstream decentralized application and $Chromia products do you think is suitable for the Nigerian environment?
Henrik Hjelte,
Actually, this is why we want to work with partners. We cannot know everything, For African market we have seen of course payments/remittances (but it has fallen out of trend). We would love to do real-estate /land-registration but we understand we need a strong local partner (more than a single person, a real company or organization driving).
●CC● | Elrond 🇵🇭,
What plans do you have to building a vibrant global community around Rell? And how would you go about encouraging/incentivising such ‘Rellists’ around the world to build dApps on Chromia? u/henrik_hjelte u/sergelubkin
Henrik Hjelte,
For developers (I am one too, or used to be) you normally need to prove a few things:
\ That the tech is productive (can I do apps faster?)*
\ That it is better (less bugs, more maintainable?)*
Then the community will come. We see that all the time. Look at web development. React.js came, and developers flooded to it. Not because of marketing on Superbowl, but because it was BETTER. Fewer bugs and easier to do complex webapps.
So, at core: people will come when we showcase the productivity gains, and that is what we need to focus on.
●CC● | Elrond 🇵🇭,
Why do you choose to build Chromia token on ERC20 instead of other blockchain such as BEP2, TRC20…or your own chain while ERC20 platform is very slow and have a case of fee? u/henrik_hjelte u/sergelubkin
Serge,
So far Ethereum has the best infrastructure, it’s the oldest and most reliable network for tokens. It also became the industry standard which exchanges utilize. We will transfer 80% of all erc20 tokens to our Chromia blockchain when it’s ready for that.
Koh,
In your whitepaper it says in the upcoming version of ChromiaWallet that it will be able to function as a Dapp browser for public use. Q) Will it be similar to the Dapp browser on Trust Wallet?
Serge,
It’s live already try it http://vault-testnet.chromia.com/
It’s the wallet and a dapp browser
CHROMIA is SOLID,
Your metamorphosis is a laudable one,surviving different FUD, how have you been able to survive this longest bear market and continue building and developing cos many projects have died out in this time period!
Henrik Hjelte,
You need to know we started a company before ETH existed. There was 0 money in blockchain when we started. I did it becuase it was fun, exciting tech and MAYBE someone would be interested in the thing we made “Tokens”…
We were never in the crazy bull-market, manly observed the crazies from the side. We fundraised for CHR in a dip (they called it bear market). ChromaWay the company also make money from enterprises.
Алекс,
What is SSO?
What makes it important for chromias ecosystem?
Why should we users be attracted to it?’
Serge,
Chromia SSO is perhaps the most important UX improvement that Chromia offers the decentralized world. It revolutionizes the way users interact with dapps. Any dapp requires users to sign transactions, that means they need a private key. Control of the private key is control of any and all dapps or assets associated with it. This means that private keys have an especially stringent set of security requirements in a blockchain context — they control real value, and there is no recourse if they are compromised or lost. https://blog.chromia.com/chromia-sso-the-whys-and-the-whats/
Olufemi Joel,
How do you see the Chromia project developing in 3 to 5 years, both on the commercial level and on the evolution of the company? What are the plans for expansion in different regions? Are you going to outsource the team/skills or keep it centralized and set up offices?
Henrik Hjelte,
I take part of the question. On outsource: we were a distributed team from day one, with co-founders from 3 countries (still living there). We are distributed now, Ukraine, Sweden, Vietnam, Croatia, China are “hubs” then we have individuals too. No big plan, just where we found great developers…
Park Lee, u/henrik_hjelte
You claim CHOROMIA have fast support, useful features with an affordable service cost. That fast and the fees are cheap but can you guarantee stability?
What’s the Algorithms which are used by CHROMIA for that fast? And Can you explain it?
Serge,
We use PBFT protocol with some features of DPOS, this plus sidechains parallelism offers almost unlimited speed and scalability. We also use the feature called anchoring to secure all transactions in batches on Bitcoin blockchain.
Mario Boy,
What are you guys trying to achieve as an end goal? The next Ethereum? Or the next enterprise version of Ethereum? Or something different?
Henrik Hjelte,
The end goal… good question. When we started in 2014 there were no other blockchain companies, so we wanted to do the best blockchain technology in order to enable a decentralized world with more fair applications. And that is what we still do. Technology/software that can enable people to make a fairer world
Erven James Sato,
“STAKING” is one of the STRATEGIES to ATTRACT USERS and ACHIEVE MASS ADOPTION
Does your GREAT PROJECT have plan about Staking?
Serge,
Yes, we announced our staking plans couple of months ago https://blog.chromia.com/on-providers-and-stakes/
We are working with our current partners to make it accessible for general public.
Chizoba,
I often see Chromia and ChromaWay being used interchangeably, what is the relationship between the two?
Henrik Hjelte,
ChromaWay the company started Chromia from code done as postchain. This is normal in open-source development, a company that leads development. But Chromia will be a decentalized network, so ChromaWay will not make direct money out of it more than if we have a role as a Provider (and get payed for hosting). ChromaWay can indirectly make money from optional support and maintenance etc. Also, this, perfectly normal in open-source world.
And it also benefits Chromia that there is a market for support.
A market open for competition.
No special treatment for “ChromaWay”
Enajite,
How to start coding on Chromia?
Henrik Hjelte,
Go to https://rell.chromia.com and follow the tutorial. Enjoy the free time you get compared to other blockchain languages…
●CC● | Elrond 🇵🇭,
Chromia process 500 TPS, these is slow compare to other Blockchains, where we can see now 60K TPS if more capacity require, how can that be? u/henrik_hjelte u/sergelubkin
Serge,
Yes, if you need faster speed you can use parallelism by having multiple blockchains for your dapp. Also, by optimization and better architecture sky is the limit.
Delphino.eth ⟠,
Can we consider Chromia an hybrid? For its mixing of Blockchain and a Database?
Henrik Hjelte,
Yes and no. I want to stress that Chromia is a FULL blockchain. It is not only “inspired”. It is a blockchain AND a database.
I tend to think about Hybrid more in the usecases that you might have as a customer. For example, a bank might want to have some data/transactions private (as a private blockchain) and have another half of the application with public data (on Chromia). So that is a hybrid solution, and Chromia ROCKS in that segment since it is the only blockchain that is complete relational database (what the normal world uses anyway for 85% of all applications)
Example area: “open banking”
Steve bush,
How will Chromia I have any empower Investors, Companies, Developers, Platform Users to
deliver impactful solutions and bring value to people all over the world?
Henrik Hjelte,
In order to make blockchain go big, we need to have users. Users need to be able to use apps with ease. Chromia have features like single-sign on (ease of use), but importantly do not require owning tokens to USE apps.
Also, it needs to be easy to make applications. For example, if you are a student in US and came up with an idea, you want to make an application for your school. Let’s call it “thefacebook”. You code something in PHP and MySQL. DID YOU SEE THAT. SQL. SQL.SQL. It is the same tech that Chromia has but no one else in the blockchain business. SQL rules the world if you look outside the crypto bubble. Google the Oracle head-office… 100% of all enterprises use it… Because it is easy and powerful.
And we even improve on SQL with Rell….
So, compare that with a hacky virtual machine that have a few years…. 😊
August,
“Mines of Dalarnia” is a game that has caught my attention a lot, due to its simplicity and quality. But in the time that I have used it I have not been able to differentiate between the Chromia blockchain of this game and that of the competition? What other games do you have next to develop? I would like to give ideas in those games like a Gamers!
Henrik Hjelte,
We thought about in corona time sports club might want to engage more with their fans digitally. And of course, E-Sports is getting a real momentum as the young generation grows up. Now a bit sad that all games are centralized. My daughter will be sad when (at some day?) they will close down roblox… it happens to all centralized apps eventually… that is what we fix. Power to the Public to control apps and their future. I’ll repost again Alex post. Sorry I like it a lot… https://blog.chromia.com/towards-publicly-hosted-applications/
Bisolar,
Good day Chromia team from a Chromia fan
Can you tell us Chromia’s geographical focus at the moment and the proces it follows for it BUSINESS DEVELOPMENT?
What factors do you consider before identifying NEW MARKETS to enter?
Serge,
Chromia will initially focus on community building in China, Korea, US and Europe. The focus of community growth will gradually expand to other markets as the project gains popularity.
Current community growth strategies of Chromia include:
Chromia blockchain incubator creation to welcome more projects to the Chromia blockchain
Host blockchain gaming conferences, workshops, and meetups to engage with potential users.
Provide online and face-to-face tutorials to engage with dapps developers.
Attract blockchain developers through direct and indirect approach via specialized platforms and communities.
Develop our relations with existing and previous corporate clients, and their partnership networks to participate in their blockchain ventures
Launch Node program to encourage system providers to run nodes on the Chromia blockchain.
Staking program for Chroma (CHR) tokens
Active community engagement via social channels.
Future community growth strategies of Chromia after Mainnet launch include:
Partner with more gaming studios, startups and enterprises
Build local communities with Ambassador Programs.
Partner with external incubator and accelerators to provide blockchain expertise and introduce projects to Chromia ecosystem
Continue organizing hackathons around the world to attract more developers.
Emmanuel,
I want to know the current structure of your roadmap? What is the future roadmap of CHROMIA? Is there any key milestone coming???
Henrik Hjelte,
It is easy to do a roadmap; anyone can make a pape plan. But I think they are used in the wrong way. Software is hard, blockchain is even harder because it NEEDS TO BE SECURE. No MVP releases. We cannot even have roadmap deadlines and skimp on quality. Where we are now though is: Rell language finished so much that developers can write apps and see its magic. We have external devs doing dapps. We have the first phase of mainnet. We have a series of releases coming up. We will release mainnet when it is secure enough, and gradual roll out. I think quite soon, development is going great at the moment, a bit quicker than we though.
Ellkayy,
Why doesn’t Chromia transactions use gas? How do you power transactions then?
Serge,
Main feature of gas in Ethereum is to pay for transactions for miners get rewards. In our scenario Providers get rewards from dapp owners. So dapp owner pays for storing their dapp. It’s like Amazon Web Service model. Then dapp owner can monetize it in its own way.
Ellkayy,
Many developers don’t know RELL, just Solidity and SQL. Is this a barrier or threat to Chromia? Why RELL is better?
Henrik Hjelte,
Very few developers know Solidity. Do a search on github. I referred previously to stackoverflow programming language survey results. https://insights.stackoverflow.com/survey/2019#technology
If you know SQL, you learn Rell in a day.
SQL is the top 3 language here. I’d say there are millions that can easily jump to Rell.
Soldity or other blockchains, not on top 20 list even.
Rell is a hipper, nicer version of SQL that is also a “normal” programming language.
Developers like to learn new things, new languages. Otherwise we would be stuck with PHP, the DOMINANT language. Well, is it still? Seems javascript and react.js and node etc is taking over…
Moh (Binance Angel)🇳🇬,
This brings us to the end of the AMA. It’s been a pleasure being with all of you, THANK YOU. Special shout out to u/sergelubkin and u/henrik_hjelte for honouring us with their presence today❤️
Kindly follow CHROMIA on twitter and join the conversation with their community on Telegram
Twitter: https://twitter.com/Chromia
Telegram: https://t.me/hellochromia
Official Chromia Nigeria Community Channel 🇳🇬 : https://t.me/ChromiaNigeria
Website: www.chromia.com
submitted by dam30 to Teamchromia [link] [comments]

Bitcoin (BTC)A Peer-to-Peer Electronic Cash System.

Bitcoin (BTC)A Peer-to-Peer Electronic Cash System.
  • Bitcoin (BTC) is a peer-to-peer cryptocurrency that aims to function as a means of exchange that is independent of any central authority. BTC can be transferred electronically in a secure, verifiable, and immutable way.
  • Launched in 2009, BTC is the first virtual currency to solve the double-spending issue by timestamping transactions before broadcasting them to all of the nodes in the Bitcoin network. The Bitcoin Protocol offered a solution to the Byzantine Generals’ Problem with a blockchain network structure, a notion first created by Stuart Haber and W. Scott Stornetta in 1991.
  • Bitcoin’s whitepaper was published pseudonymously in 2008 by an individual, or a group, with the pseudonym “Satoshi Nakamoto”, whose underlying identity has still not been verified.
  • The Bitcoin protocol uses an SHA-256d-based Proof-of-Work (PoW) algorithm to reach network consensus. Its network has a target block time of 10 minutes and a maximum supply of 21 million tokens, with a decaying token emission rate. To prevent fluctuation of the block time, the network’s block difficulty is re-adjusted through an algorithm based on the past 2016 block times.
  • With a block size limit capped at 1 megabyte, the Bitcoin Protocol has supported both the Lightning Network, a second-layer infrastructure for payment channels, and Segregated Witness, a soft-fork to increase the number of transactions on a block, as solutions to network scalability.

https://preview.redd.it/s2gmpmeze3151.png?width=256&format=png&auto=webp&s=9759910dd3c4a15b83f55b827d1899fb2fdd3de1

1. What is Bitcoin (BTC)?

  • Bitcoin is a peer-to-peer cryptocurrency that aims to function as a means of exchange and is independent of any central authority. Bitcoins are transferred electronically in a secure, verifiable, and immutable way.
  • Network validators, whom are often referred to as miners, participate in the SHA-256d-based Proof-of-Work consensus mechanism to determine the next global state of the blockchain.
  • The Bitcoin protocol has a target block time of 10 minutes, and a maximum supply of 21 million tokens. The only way new bitcoins can be produced is when a block producer generates a new valid block.
  • The protocol has a token emission rate that halves every 210,000 blocks, or approximately every 4 years.
  • Unlike public blockchain infrastructures supporting the development of decentralized applications (Ethereum), the Bitcoin protocol is primarily used only for payments, and has only very limited support for smart contract-like functionalities (Bitcoin “Script” is mostly used to create certain conditions before bitcoins are used to be spent).

2. Bitcoin’s core features

For a more beginner’s introduction to Bitcoin, please visit Binance Academy’s guide to Bitcoin.

Unspent Transaction Output (UTXO) model

A UTXO transaction works like cash payment between two parties: Alice gives money to Bob and receives change (i.e., unspent amount). In comparison, blockchains like Ethereum rely on the account model.
https://preview.redd.it/t1j6anf8f3151.png?width=1601&format=png&auto=webp&s=33bd141d8f2136a6f32739c8cdc7aae2e04cbc47

Nakamoto consensus

In the Bitcoin network, anyone can join the network and become a bookkeeping service provider i.e., a validator. All validators are allowed in the race to become the block producer for the next block, yet only the first to complete a computationally heavy task will win. This feature is called Proof of Work (PoW).
The probability of any single validator to finish the task first is equal to the percentage of the total network computation power, or hash power, the validator has. For instance, a validator with 5% of the total network computation power will have a 5% chance of completing the task first, and therefore becoming the next block producer.
Since anyone can join the race, competition is prone to increase. In the early days, Bitcoin mining was mostly done by personal computer CPUs.
As of today, Bitcoin validators, or miners, have opted for dedicated and more powerful devices such as machines based on Application-Specific Integrated Circuit (“ASIC”).
Proof of Work secures the network as block producers must have spent resources external to the network (i.e., money to pay electricity), and can provide proof to other participants that they did so.
With various miners competing for block rewards, it becomes difficult for one single malicious party to gain network majority (defined as more than 51% of the network’s hash power in the Nakamoto consensus mechanism). The ability to rearrange transactions via 51% attacks indicates another feature of the Nakamoto consensus: the finality of transactions is only probabilistic.
Once a block is produced, it is then propagated by the block producer to all other validators to check on the validity of all transactions in that block. The block producer will receive rewards in the network’s native currency (i.e., bitcoin) as all validators approve the block and update their ledgers.

The blockchain

Block production

The Bitcoin protocol utilizes the Merkle tree data structure in order to organize hashes of numerous individual transactions into each block. This concept is named after Ralph Merkle, who patented it in 1979.
With the use of a Merkle tree, though each block might contain thousands of transactions, it will have the ability to combine all of their hashes and condense them into one, allowing efficient and secure verification of this group of transactions. This single hash called is a Merkle root, which is stored in the Block Header of a block. The Block Header also stores other meta information of a block, such as a hash of the previous Block Header, which enables blocks to be associated in a chain-like structure (hence the name “blockchain”).
An illustration of block production in the Bitcoin Protocol is demonstrated below.

https://preview.redd.it/m6texxicf3151.png?width=1591&format=png&auto=webp&s=f4253304912ed8370948b9c524e08fef28f1c78d

Block time and mining difficulty

Block time is the period required to create the next block in a network. As mentioned above, the node who solves the computationally intensive task will be allowed to produce the next block. Therefore, block time is directly correlated to the amount of time it takes for a node to find a solution to the task. The Bitcoin protocol sets a target block time of 10 minutes, and attempts to achieve this by introducing a variable named mining difficulty.
Mining difficulty refers to how difficult it is for the node to solve the computationally intensive task. If the network sets a high difficulty for the task, while miners have low computational power, which is often referred to as “hashrate”, it would statistically take longer for the nodes to get an answer for the task. If the difficulty is low, but miners have rather strong computational power, statistically, some nodes will be able to solve the task quickly.
Therefore, the 10 minute target block time is achieved by constantly and automatically adjusting the mining difficulty according to how much computational power there is amongst the nodes. The average block time of the network is evaluated after a certain number of blocks, and if it is greater than the expected block time, the difficulty level will decrease; if it is less than the expected block time, the difficulty level will increase.

What are orphan blocks?

In a PoW blockchain network, if the block time is too low, it would increase the likelihood of nodes producingorphan blocks, for which they would receive no reward. Orphan blocks are produced by nodes who solved the task but did not broadcast their results to the whole network the quickest due to network latency.
It takes time for a message to travel through a network, and it is entirely possible for 2 nodes to complete the task and start to broadcast their results to the network at roughly the same time, while one’s messages are received by all other nodes earlier as the node has low latency.
Imagine there is a network latency of 1 minute and a target block time of 2 minutes. A node could solve the task in around 1 minute but his message would take 1 minute to reach the rest of the nodes that are still working on the solution. While his message travels through the network, all the work done by all other nodes during that 1 minute, even if these nodes also complete the task, would go to waste. In this case, 50% of the computational power contributed to the network is wasted.
The percentage of wasted computational power would proportionally decrease if the mining difficulty were higher, as it would statistically take longer for miners to complete the task. In other words, if the mining difficulty, and therefore targeted block time is low, miners with powerful and often centralized mining facilities would get a higher chance of becoming the block producer, while the participation of weaker miners would become in vain. This introduces possible centralization and weakens the overall security of the network.
However, given a limited amount of transactions that can be stored in a block, making the block time too longwould decrease the number of transactions the network can process per second, negatively affecting network scalability.

3. Bitcoin’s additional features

Segregated Witness (SegWit)

Segregated Witness, often abbreviated as SegWit, is a protocol upgrade proposal that went live in August 2017.
SegWit separates witness signatures from transaction-related data. Witness signatures in legacy Bitcoin blocks often take more than 50% of the block size. By removing witness signatures from the transaction block, this protocol upgrade effectively increases the number of transactions that can be stored in a single block, enabling the network to handle more transactions per second. As a result, SegWit increases the scalability of Nakamoto consensus-based blockchain networks like Bitcoin and Litecoin.
SegWit also makes transactions cheaper. Since transaction fees are derived from how much data is being processed by the block producer, the more transactions that can be stored in a 1MB block, the cheaper individual transactions become.
https://preview.redd.it/depya70mf3151.png?width=1601&format=png&auto=webp&s=a6499aa2131fbf347f8ffd812930b2f7d66be48e
The legacy Bitcoin block has a block size limit of 1 megabyte, and any change on the block size would require a network hard-fork. On August 1st 2017, the first hard-fork occurred, leading to the creation of Bitcoin Cash (“BCH”), which introduced an 8 megabyte block size limit.
Conversely, Segregated Witness was a soft-fork: it never changed the transaction block size limit of the network. Instead, it added an extended block with an upper limit of 3 megabytes, which contains solely witness signatures, to the 1 megabyte block that contains only transaction data. This new block type can be processed even by nodes that have not completed the SegWit protocol upgrade.
Furthermore, the separation of witness signatures from transaction data solves the malleability issue with the original Bitcoin protocol. Without Segregated Witness, these signatures could be altered before the block is validated by miners. Indeed, alterations can be done in such a way that if the system does a mathematical check, the signature would still be valid. However, since the values in the signature are changed, the two signatures would create vastly different hash values.
For instance, if a witness signature states “6,” it has a mathematical value of 6, and would create a hash value of 12345. However, if the witness signature were changed to “06”, it would maintain a mathematical value of 6 while creating a (faulty) hash value of 67890.
Since the mathematical values are the same, the altered signature remains a valid signature. This would create a bookkeeping issue, as transactions in Nakamoto consensus-based blockchain networks are documented with these hash values, or transaction IDs. Effectively, one can alter a transaction ID to a new one, and the new ID can still be valid.
This can create many issues, as illustrated in the below example:
  1. Alice sends Bob 1 BTC, and Bob sends Merchant Carol this 1 BTC for some goods.
  2. Bob sends Carols this 1 BTC, while the transaction from Alice to Bob is not yet validated. Carol sees this incoming transaction of 1 BTC to him, and immediately ships goods to B.
  3. At the moment, the transaction from Alice to Bob is still not confirmed by the network, and Bob can change the witness signature, therefore changing this transaction ID from 12345 to 67890.
  4. Now Carol will not receive his 1 BTC, as the network looks for transaction 12345 to ensure that Bob’s wallet balance is valid.
  5. As this particular transaction ID changed from 12345 to 67890, the transaction from Bob to Carol will fail, and Bob will get his goods while still holding his BTC.
With the Segregated Witness upgrade, such instances can not happen again. This is because the witness signatures are moved outside of the transaction block into an extended block, and altering the witness signature won’t affect the transaction ID.
Since the transaction malleability issue is fixed, Segregated Witness also enables the proper functioning of second-layer scalability solutions on the Bitcoin protocol, such as the Lightning Network.

Lightning Network

Lightning Network is a second-layer micropayment solution for scalability.
Specifically, Lightning Network aims to enable near-instant and low-cost payments between merchants and customers that wish to use bitcoins.
Lightning Network was conceptualized in a whitepaper by Joseph Poon and Thaddeus Dryja in 2015. Since then, it has been implemented by multiple companies. The most prominent of them include Blockstream, Lightning Labs, and ACINQ.
A list of curated resources relevant to Lightning Network can be found here.
In the Lightning Network, if a customer wishes to transact with a merchant, both of them need to open a payment channel, which operates off the Bitcoin blockchain (i.e., off-chain vs. on-chain). None of the transaction details from this payment channel are recorded on the blockchain, and only when the channel is closed will the end result of both party’s wallet balances be updated to the blockchain. The blockchain only serves as a settlement layer for Lightning transactions.
Since all transactions done via the payment channel are conducted independently of the Nakamoto consensus, both parties involved in transactions do not need to wait for network confirmation on transactions. Instead, transacting parties would pay transaction fees to Bitcoin miners only when they decide to close the channel.
https://preview.redd.it/cy56icarf3151.png?width=1601&format=png&auto=webp&s=b239a63c6a87ec6cc1b18ce2cbd0355f8831c3a8
One limitation to the Lightning Network is that it requires a person to be online to receive transactions attributing towards him. Another limitation in user experience could be that one needs to lock up some funds every time he wishes to open a payment channel, and is only able to use that fund within the channel.
However, this does not mean he needs to create new channels every time he wishes to transact with a different person on the Lightning Network. If Alice wants to send money to Carol, but they do not have a payment channel open, they can ask Bob, who has payment channels open to both Alice and Carol, to help make that transaction. Alice will be able to send funds to Bob, and Bob to Carol. Hence, the number of “payment hubs” (i.e., Bob in the previous example) correlates with both the convenience and the usability of the Lightning Network for real-world applications.

Schnorr Signature upgrade proposal

Elliptic Curve Digital Signature Algorithm (“ECDSA”) signatures are used to sign transactions on the Bitcoin blockchain.
https://preview.redd.it/hjeqe4l7g3151.png?width=1601&format=png&auto=webp&s=8014fb08fe62ac4d91645499bc0c7e1c04c5d7c4
However, many developers now advocate for replacing ECDSA with Schnorr Signature. Once Schnorr Signatures are implemented, multiple parties can collaborate in producing a signature that is valid for the sum of their public keys.
This would primarily be beneficial for network scalability. When multiple addresses were to conduct transactions to a single address, each transaction would require their own signature. With Schnorr Signature, all these signatures would be combined into one. As a result, the network would be able to store more transactions in a single block.
https://preview.redd.it/axg3wayag3151.png?width=1601&format=png&auto=webp&s=93d958fa6b0e623caa82ca71fe457b4daa88c71e
The reduced size in signatures implies a reduced cost on transaction fees. The group of senders can split the transaction fees for that one group signature, instead of paying for one personal signature individually.
Schnorr Signature also improves network privacy and token fungibility. A third-party observer will not be able to detect if a user is sending a multi-signature transaction, since the signature will be in the same format as a single-signature transaction.

4. Economics and supply distribution

The Bitcoin protocol utilizes the Nakamoto consensus, and nodes validate blocks via Proof-of-Work mining. The bitcoin token was not pre-mined, and has a maximum supply of 21 million. The initial reward for a block was 50 BTC per block. Block mining rewards halve every 210,000 blocks. Since the average time for block production on the blockchain is 10 minutes, it implies that the block reward halving events will approximately take place every 4 years.
As of May 12th 2020, the block mining rewards are 6.25 BTC per block. Transaction fees also represent a minor revenue stream for miners.
submitted by D-platform to u/D-platform [link] [comments]

Top 7 unique, high-potential cryptocurrencies of 2019 that are actually innovating the space

Right now, the top 20 has 2 forks of Bitcoin, Tether, an exchange's token, Ethereum Classic, and a few other projects that make this space look far less serious than it really is. On the other hand, you have many great projects out of the top 20 with huge potential going forward. The purpose of this post is to discuss the cryptocurrencies that I believe are exciting, different, and already have (or are extremely close to having) a working project. These are the projects that actually keep my faith alive in crypto among all the other BS out there. I'm hoping to outline a few projects you know, as well as some smaller ones. I will exclude Bitcoin, Ethereum, and XRP from this list, as everyone knows them already and what they do. This is NOT MEANT TO BE AN ALL-INCLUSIVE LIST - that means I'm definitely missing some projects. However, these are some of the projects I believe will make seriously large contributions to the space going forward.
1 - Nano. Reddit already shills the hell out of this coin, and it's for good reason. Nano is the single fastest and cheapest (100% free) P2P digital currency in the space, period. There's something to be said about sending somebody 50 Nano and them receiving EXACTLY 50 Nano, not 49.999 or something similar. Nano is an actual innovation in the space, with a very different codebase than other coins. It uses a block lattice (instead of using a blockchain), which is an incredible invention, and is reminiscent of the kind of innovation that ETH first offered for blockchain applications in 2015 - but for digital cash. Nano feels like what Bitcoin should have been from Day 1. Download the mobile app/create a web wallet and send some back and forth between the two - you'll understand why people are so bullish on this coin once you've tried it out for yourself.
2 - Monero. If any coin most clearly resembles the fungibility and privacy of using physical cash, it's Monero. It's the only major coin that is fully private by default, 100% of the time. The recent updates over the past few months have made Monero extremely cheap and fast to use, and if you haven't tried it out, I'd highly recommend it (MyMonero's web wallet is excellent https://wallet.mymonero.com). There's no denying this coin's potential to shape the space in the future as the top privacy coin. Monero has also proven to be highly resistant to bear trends, holding its price better than nearly every other top 40 coin in the last bear market. Lastly, the team is extremely competent and makes real innovations to this coin - between making transactions fully private, cost reduction/speed upgrades, and forking away from ASIC mining, this team has proven that they are little talk, ALL action, and committed to constantly improving this cryptocurrency.
  1. Augur - This decentralized betting platform was one of the first Ethereum dapps ever planned, and took nearly 3 years to come to fruition. It is one of the most well-made, useful dapps running on Ethereum right now and has real users making markets every single day. You can bet on pretty much anything using Augur, and it's actually completely decentralized - meaning no third parties or governments who are unhappy with the content or types of bets being placed - can shut this dapp down. It does have a few issues for sure, but I am confident that they are minor and will be resolved in time as this market continues to mature.
  2. Lisk - Though the project has seen many delays in its time, the Alpha SDK - their biggest innovation - is just about to launch. Lisk will be the first project to really bring sidechains for dapps into the cryptocurrency space, and this is a big deal. It's not just another dapp platform - these sidechains allow for much more customization than simply running a dapp on Ethereum, Tron, or EOS. Dapps can be written in pure Javascript, a language that every software developer knows, and the dapps themselves won't be held back by many of the issues that Ethereum has (average-slow network speed/congestion issues, etc). Not to mention, their team is massive (30+), they have plenty of funding and the price is very low right now ($2, with an ATH of over $35).
  3. IOTA - No matter what you think of this coin, IOTA's tangle is undeniably different. It's DAG-like technology is refreshing to see in a space where 98% of coins are just clones/forks of other coins - even if it doesn't work the way it should yet. It's possible that the removal of blocks and instead creating a tangle of transactions where every node in the network helps to power future transactions could allow for scaling beyond what current blockchains offer.
  4. BitTorrent - I really hesitated to list this one. Do I agree with the way Justin Sun markets and overhypes every small meeting or minor project development? Of course not. However, there is no denying that this token will expose a TON of new users to cryptocurrency for the first time - arguably more than any other dapp token. BitTorrent, the application, is already being used by millions of users, and there's no denying that. This is a rare situation and no other cryptocurrency dapp has anywhere near the user count that this BitTorrent has. While I don't love Tron in general... it is largely an Ethereum clone with few advantages other than added hype...BTT is guaranteed to at least see some real-world usage and it might be good to own a few tokens.
  5. Upfiring - If you like the idea that BitTorrent is putting forth (rewarding seeders), Upfiring is that exact idea - but their dapp is literally already out and nobody knows about it yet. I hesitated to list this project due to the low market cap, but it just might be one of the most useful dapps out there and one of the best uses of smart contracts. The dapp is awesome - super sleek and easy to use. In terms of high potential projects, this one is huge with around a 2 million USD market cap and really could explode at any time imo. You can download their dapp right now and share files on the blockchain, set a price in UFR for your files and earn crypto when others download them. Torrenting is one of the areas that I believe crypto will make a big impact in, since rewarding seeders is an excellent use-case to incentivize file-sharing. With an ATH of 40 million, it has reached 20x the current market cap before, so the price and hype level is currently low.
Major projects to watch out for due to being overvalued or other significant red flags (please don't downvote this post if you disagree with these - instead, let us know why you disagree in the comments):
1 - Litecoin. I'd certainly agree it should be in the Top 50 due to its fame status, but the #4 position is ridiculously high for a coin like this. Put simply, there is simply no major use case for this coin. If you wanted to use something as cash, Nano and even Bitcoin Cash are arguably both better options. At least Bitcoin serves as the standard for markets on exchanges. Remember that the creator of this coin has literally sold all of it as well - while arguably a smart move on his part, it's something to keep in mind.
2 - Binance Coin. Regardless of the fact that it is Binance, and Binance is great, this coin's entire value is based on a 100% CENTRALIZED business. That's a big deal. This means if something ever happens to Binance, for whatever reason, BNB's value will directly be affected as a result. In addition, a 4.5 BILLION dollar market cap for an exchange token is just a ridiculous market cap in general, even if it is Binance. Props to Binance for making this token so successful, though.
3 - Stellar. This is a big one, and I know I'm going to take some heat for listing this, so let me clarify. I really like what Stellar is doing with payments, for sure, but one thing that makes that all null and void from an investment standpoint - Stellar's team owns over 80% of the entire Stellar coin supply. Let that sink in for a second. 19,331,690,041 XLM is circulating among every single Stellar holder, while the team themselves holds 85,710,809,041 XLM. People tend to ignore this fact for some reason, but it's unfortunately a huge deal and requires that you put a ton of trust in Stellar's team not to casually sell millions of dollars worth of their XLM whenever they want more money. How would you feel if Vitalik owned 400,000,000 ETH? That's the same ratio to what the Stellar team owns. There's also been a ton of sketchy things that have happened with the team selling off millions of dollars worth of coins in 2017/early 2018 - you can search those in the search bar to read up on those incidents where users here tracked those transactions. Lastly, Stellar is a fork of Ripple. Not that this is a bad thing necessarily, but it's something to keep note of.
4 - Bitcoin SV. Yeah, it's pumping right now. Who cares, so are lots of coins. Ignore it, and maybe it will go away. This coin once again serves no real purpose and has no place being the #8 cryptocurrency with how many great projects are sitting below it.
5 - Ethereum Classic. This coin has already been 51% attacked SUCCESSFULLY, and it's value has gone up since then. In addition, no changes have been made to the coin to prevent such an attack in the future, and none are planned. No hard forks will happen to improve this coin, ever...that's because Ethereum Classic's main value proposition is immutable and irreversible transactions, Ironic - because the 51% attack showed that transactions on this chain are actually the exact opposite of this. Obviously, this coin should be avoided.
And before you ask, why did I leave out... -Cardano: Interesting project but too far away from releasing their smart contracts to mention in this post. In addition, market cap is extremely high for not having a working product out yet
-Tron: A hyped-version of Ethereum with few differences. Not necessarily bad, but not innovative enough to mention from a technological standpoint. I won't comment on their marketing tactics...
-Vechain: It remains to be seen whether this use-case will ever play out using a public blockchain like this with real businesses. Certainly one to keep an eye on, but as of right now it's not being used on any sort of large scale
-Qtum: Still has yet to find a real niche over projects like Ethereum, Tron, and EOS
-EOS: Raised billions of dollars in their ICO but their platform still has many issues. There are some decent developments like Everipedia on it, but overall I decided to leave it out due to once again, not offering anything THAT innovative to the space, and the lack of decentralization (EOS team can freeze transactions)
I'll update the top list as well if anyone provides me with good projects that I may have missed out on here!
submitted by devila2208 to CryptoCurrency [link] [comments]

HUOBI EXCHANGE REVIEW

HUOBI EXCHANGE REVIEW
Huobi is a Singapore-based cryptocurrency exchange. Founded in China, the company now has offices in Hong Kong, Korea, Japan and the United States. In August 2018 it became a publicly listed Hong Kong company.
Recently during early 2019, after crypto communities lost interest in ICOs (Initial Coin Offering) due to many unregistered STOs (Security Token Offering) and other projects whose aim was only to raise the funds. Exchanges adapted and gave a new dimension of the fund raising, IEO (Initial Exchange Offering).
In this regard, exchanges helped the projects by providing them a platform to raise the funds and also helped the retail investors by doing due diligence on the project on behalf of the investors. Best part of this process is, such issued tokens are listed on the same platform and exchanges helped these start ups in the process. This gave a sense of security and helped to maintain integrity with the projects and public investors.
All the top tier exchanges are participating in this movement and named such fund raising as Launchpad, Jumpstart, Spotlight, Startup etc. While Huobi came up with Huobi Prime.
Unlike other exchanges, Huobi Prime has helped varieties of start-ups.
  • It all started with a DAG based blockchain platform, Top Network.
  • A project named after the greatest scientist who made a major impact on the human lives, Newton Project. It is aimed to deliver an infrastructure for the community economy.
  • It is followed by Thunder Core. A blockchain project dreamt of decentralized future and allows anyone to build dApps on their platform.
  • Then Reserve Rights continued the legacy. It’s a protocol for stable currencies with three kinds of tokens RSV, RSR and collateral tokens.
  • Akropolis - a protocol to explore the informal economy and help the people with DeFi. It was one of it’s kind which was competitive enough to seek the help from the Huobi.
  • Later a social digital currency, Emogi secured a place to be the next Prime project.
  • Recently, Whole Network - A consensus, co-creation, and win-win behavioral value network had the opportunity to feature as a 7th Prime project.
However, each of the Prime project is different from the other in the list. One must admit, it is a basket with mixed fruits. From DAG to Currency to dApp platform to stable coin protocol to DeFi protocol to digital currency to blockchain phone. Huobi has covered a rich list of projects in this journey.

https://preview.redd.it/8z08lbq3qls41.png?width=800&format=png&auto=webp&s=34de122d950f32feb46df82cdce290221e1572be

(This chart presents the information based on the price of the each token on 2nd October. However it may vary marginally as price of the cryptocurrencies are volatile in nature)
Trading Options
Many centralized exchanges serve as the sole, centralized market maker. In contrast, Huobi also allows you to trade over the counter (OTC). This means that you can buy and sell cryptocurrencies peer-to-peer on Huobi. Even though this option exists on the exchange, it has yet to gain adoption from traders. Various commenters have said that there is a lack of OTC offers. Still, this is still an innovative technical feature.

If you are a margin trader, Houbi has a separate platform specifically for this. You can access this by going to the margin tab in the header. The amount of leverage you can have varies from coin-to-coin. For example, BTC is around 3x. Compared to other margin trading platforms, this is low. Nonetheless, it is an attractive option for potential users.

In December 2018, Huobi Derivative Market issued BTC contracts and ETH contracts (including weekly, bi-weekly and quarterly, respectively), and flexible leverages, including 1x, 5x, 10x and 20x. In the future, more digital currencies will be issued to meet various investment demands.
Meaning “currency” in Mandarin Chinese, Huobi consistently ranks as one of the world’s top ten largest exchanges by trade volume. In this article, we look at everything you need to know as a potential Huobi user. Let’s examine fees, fund security, customer experience and more.

User Interface and Mobile App

Available on iOS and Android, the Huobi mobile app features most of the functionalities available on the web platform. You can even complete tasks like account registration and verification directly via the app. In Google Play, the Huobi Global app has an average rating of 4.1 stars out of 3,730 reviews. However, in December 2018 and January 2019, some users have said that the Android app won’t let them login due to an error with Captcha. On the Apple App Store, Huobi boasts an average rating of 4.9 stars out of over 4,800 reviews.

Trading Options

Many centralized exchanges serve as the sole, centralized market maker. In contrast, Huobi also allows you to trade over the counter (OTC). This means that you can buy and sell cryptocurrencies peer-to-peer on Huobi. Even though this option exists on the exchange, it has yet to gain adoption from traders. Various commenters have said that there is a lack of OTC offers. Still, this is still an innovative technical feature.

If you are a margin trader, Houbi has a separate platform specifically for this. You can access this by going to the margin tab in the header. The amount of leverage you can have varies from coin-to-coin. For example, BTC is around 3x. Compared to other margin trading platforms, this is low. Nonetheless, it is an attractive option for potential users.

In December 2018, Huobi Derivative Market issued BTC contracts and ETH contracts (including weekly, bi-weekly and quarterly, respectively), and flexible leverages, including 1x, 5x, 10x and 20x. In the future, more digital currencies will be issued to meet various investment demands.

Huobi offers a margin trading option.

Security

Compared to other exchanges, Huobi continues to excel from a security perspective. Many top exchanges suffer from large-scale hacks, with varying results in terms of trading volume afterward. In 2015, a Bitstamp hacker withdrew 12,000 BTC from Huobi. However, this issue did not relate to the security of Huobi. Huobi reported a DDOS attack in 2015 but this did not cause a security breach. According to one review, an individual user lost USDT and EOS on Huobi. This reviewer states that the problem was caused by a technical error with Huobi’s 2FA. One comment suggests that it was the result of a phishing scam.

Huobi claims that its risk controls have been developed by the likes of Goldman Sachs. The exchange stores around 98 percent of funds in cold wallets. Moreover, Huobi now utilizes a decentralized exchange structure to prevent DDOS attacks. The exchange even has a User Protection Fund Initiative. Twenty percent of net revenue that the exchanges gains from trades will go to this fund, which it will use to buy back Huobi Token (HT). It also has a service called Huobi Security Reserve. As part of this, the exchange plans to store 20,000 BTC for insurance. This is a preventative measure that will help Huobi reimburse users in the case of any future hacks.

Huobi Fees

Huobi has a 0.2 percent fee that applies to both market makers and takers for amounts between $0 and $5,000,000 over the course of a 30-day period. In comparison, other top exchanges like Binance have 0.1 percent fees. Meanwhile, GDAX has 0.3 percent fees.

In January 2019, Huobi Global launched a tiered fee structure that significantly reduces fees for higher volume traders. This is relatively competitive when compared to other exchanges. Users also have the option to reduce trading fees on Huobi by becoming a VIP member. This involves paying a monthly payment of HT, which varies depending on the membership level (1-5).

Like most exchanges Huobi has no fees on deposits. However, Huobi does have withdrawal fees and minimums that vary from coin-to-coin. For example, withdrawing Bitcoin (BTC) costs 0.001 BTC, with a minimum withdrawal amount of 0.01 BTC. For Tether (USDT), the flat fee is 5 USDT and minimum withdrawal amount is 20 USDT. Overall, this means that Huobi fees are generally higher than most exchanges for lower withdrawal amounts. A few exceptions exist. For example, TUSD has a withdrawal minimum of $20 but a withdrawal fee of only $2.

Withdrawal Limitations

Similar to many exchanges on the market, Huobi has withdrawal limitations based on various levels of user verification. One thing you will notice is that withdrawal amounts vary greatly depending on your citizenship. For example, if you are a citizen of China, you can’t withdraw any funds as an unverified user or with level 1 verification. This option is only available at level 2 or above. In the United States, the exchange only requires level 1 verification. However, the amounts are relatively low: a daily limit of $2,000 and a monthly limit of $10,000.

Customer Service Experience

Compared to most exchanges, Huobi has above average customer service experience. Customer support is available 24/7, and response times only take two to three hours on average. Many consider this to be a rarity in the space.

There are two main methods that you can use to reach customer support. First, you can utilize the chat app that is available directly on the Huobi trading platform. Second, you can contact the team at [[email protected]](mailto:[email protected]). If you choose this option, Huobi asks that you use the registered email address associated with your Huobi account and include your user ID.

Huobi Website: https://www.huobi.vc/en-us/topic/invited/?invite_code=3afg5
UID: 134371568
Huobi Indian Community: https://t.me/huobiglobalindia
Huobi Global Community: https://t.me/huobiglobalofficial
submitted by asheroliver to u/asheroliver [link] [comments]

Technical: A Brief History of Payment Channels: from Satoshi to Lightning Network

Who cares about political tweets from some random country's president when payment channels are a much more interesting and are actually capable of carrying value?
So let's have a short history of various payment channel techs!

Generation 0: Satoshi's Broken nSequence Channels

Because Satoshi's Vision included payment channels, except his implementation sucked so hard we had to go fix it and added RBF as a by-product.
Originally, the plan for nSequence was that mempools would replace any transaction spending certain inputs with another transaction spending the same inputs, but only if the nSequence field of the replacement was larger.
Since 0xFFFFFFFF was the highest value that nSequence could get, this would mark a transaction as "final" and not replaceable on the mempool anymore.
In fact, this "nSequence channel" I will describe is the reason why we have this weird rule about nLockTime and nSequence. nLockTime actually only works if nSequence is not 0xFFFFFFFF i.e. final. If nSequence is 0xFFFFFFFF then nLockTime is ignored, because this if the "final" version of the transaction.
So what you'd do would be something like this:
  1. You go to a bar and promise the bartender to pay by the time the bar closes. Because this is the Bitcoin universe, time is measured in blockheight, so the closing time of the bar is indicated as some future blockheight.
  2. For your first drink, you'd make a transaction paying to the bartender for that drink, paying from some coins you have. The transaction has an nLockTime equal to the closing time of the bar, and a starting nSequence of 0. You hand over the transaction and the bartender hands you your drink.
  3. For your succeeding drink, you'd remake the same transaction, adding the payment for that drink to the transaction output that goes to the bartender (so that output keeps getting larger, by the amount of payment), and having an nSequence that is one higher than the previous one.
  4. Eventually you have to stop drinking. It comes down to one of two possibilities:
    • You drink until the bar closes. Since it is now the nLockTime indicated in the transaction, the bartender is able to broadcast the latest transaction and tells the bouncers to kick you out of the bar.
    • You wisely consider the state of your liver. So you re-sign the last transaction with a "final" nSequence of 0xFFFFFFFF i.e. the maximum possible value it can have. This allows the bartender to get his or her funds immediately (nLockTime is ignored if nSequence is 0xFFFFFFFF), so he or she tells the bouncers to let you out of the bar.
Now that of course is a payment channel. Individual payments (purchases of alcohol, so I guess buying coffee is not in scope for payment channels). Closing is done by creating a "final" transaction that is the sum of the individual payments. Sure there's no routing and channels are unidirectional and channels have a maximum lifetime but give Satoshi a break, he was also busy inventing Bitcoin at the time.
Now if you noticed I called this kind of payment channel "broken". This is because the mempool rules are not consensus rules, and cannot be validated (nothing about the mempool can be validated onchain: I sigh every time somebody proposes "let's make block size dependent on mempool size", mempool state cannot be validated by onchain data). Fullnodes can't see all of the transactions you signed, and then validate that the final one with the maximum nSequence is the one that actually is used onchain. So you can do the below:
  1. Become friends with Jihan Wu, because he owns >51% of the mining hashrate (he totally reorged Bitcoin to reverse the Binance hack right?).
  2. Slip Jihan Wu some of the more interesting drinks you're ordering as an incentive to cooperate with you. So say you end up ordering 100 drinks, you split it with Jihan Wu and give him 50 of the drinks.
  3. When the bar closes, Jihan Wu quickly calls his mining rig and tells them to mine the version of your transaction with nSequence 0. You know, that first one where you pay for only one drink.
  4. Because fullnodes cannot validate nSequence, they'll accept even the nSequence=0 version and confirm it, immutably adding you paying for a single alcoholic drink to the blockchain.
  5. The bartender, pissed at being cheated, takes out a shotgun from under the bar and shoots at you and Jihan Wu.
  6. Jihan Wu uses his mystical chi powers (actually the combined exhaust from all of his mining rigs) to slow down the shotgun pellets, making them hit you as softly as petals drifting in the wind.
  7. The bartender mutters some words, clothes ripping apart as he or she (hard to believe it could be a she but hey) turns into a bear, ready to maul you for cheating him or her of the payment for all the 100 drinks you ordered from him or her.
  8. Steely-eyed, you stand in front of the bartender-turned-bear, daring him to touch you. You've watched Revenant, you know Leonardo di Caprio could survive a bear mauling, and if some posh actor can survive that, you know you can too. You make a pose. "Drunken troll logic attack!"
  9. I think I got sidetracked here.
Lessons learned?

Spilman Channels

Incentive-compatible time-limited unidirectional channel; or, Satoshi's Vision, Fixed (if transaction malleability hadn't been a problem, that is).
Now, we know the bartender will turn into a bear and maul you if you try to cheat the payment channel, and now that we've revealed you're good friends with Jihan Wu, the bartender will no longer accept a payment channel scheme that lets one you cooperate with a miner to cheat the bartender.
Fortunately, Jeremy Spilman proposed a better way that would not let you cheat the bartender.
First, you and the bartender perform this ritual:
  1. You get some funds and create a transaction that pays to a 2-of-2 multisig between you and the bartender. You don't broadcast this yet: you just sign it and get its txid.
  2. You create another transaction that spends the above transaction. This transaction (the "backoff") has an nLockTime equal to the closing time of the bar, plus one block. You sign it and give this backoff transaction (but not the above transaction) to the bartender.
  3. The bartender signs the backoff and gives it back to you. It is now valid since it's spending a 2-of-2 of you and the bartender, and both of you have signed the backoff transaction.
  4. Now you broadcast the first transaction onchain. You and the bartender wait for it to be deeply confirmed, then you can start ordering.
The above is probably vaguely familiar to LN users. It's the funding process of payment channels! The first transaction, the one that pays to a 2-of-2 multisig, is the funding transaction that backs the payment channel funds.
So now you start ordering in this way:
  1. For your first drink, you create a transaction spending the funding transaction output and sending the price of the drink to the bartender, with the rest returning to you.
  2. You sign the transaction and pass it to the bartender, who serves your first drink.
  3. For your succeeding drinks, you recreate the same transaction, adding the price of the new drink to the sum that goes to the bartender and reducing the money returned to you. You sign the transaction and give it to the bartender, who serves you your next drink.
  4. At the end:
    • If the bar closing time is reached, the bartender signs the latest transaction, completing the needed 2-of-2 signatures and broadcasting this to the Bitcoin network. Since the backoff transaction is the closing time + 1, it can't get used at closing time.
    • If you decide you want to leave early because your liver is crying, you just tell the bartender to go ahead and close the channel (which the bartender can do at any time by just signing and broadcasting the latest transaction: the bartender won't do that because he or she is hoping you'll stay and drink more).
    • If you ended up just hanging around the bar and never ordering, then at closing time + 1 you broadcast the backoff transaction and get your funds back in full.
Now, even if you pass 50 drinks to Jihan Wu, you can't give him the first transaction (the one which pays for only one drink) and ask him to mine it: it's spending a 2-of-2 and the copy you have only contains your own signature. You need the bartender's signature to make it valid, but he or she sure as hell isn't going to cooperate in something that would lose him or her money, so a signature from the bartender validating old state where he or she gets paid less isn't going to happen.
So, problem solved, right? Right? Okay, let's try it. So you get your funds, put them in a funding tx, get the backoff tx, confirm the funding tx...
Once the funding transaction confirms deeply, the bartender laughs uproariously. He or she summons the bouncers, who surround you menacingly.
"I'm refusing service to you," the bartender says.
"Fine," you say. "I was leaving anyway;" You smirk. "I'll get back my money with the backoff transaction, and posting about your poor service on reddit so you get negative karma, so there!"
"Not so fast," the bartender says. His or her voice chills your bones. It looks like your exploitation of the Satoshi nSequence payment channel is still fresh in his or her mind. "Look at the txid of the funding transaction that got confirmed."
"What about it?" you ask nonchalantly, as you flip open your desktop computer and open a reputable blockchain explorer.
What you see shocks you.
"What the --- the txid is different! You--- you changed my signature?? But how? I put the only copy of my private key in a sealed envelope in a cast-iron box inside a safe buried in the Gobi desert protected by a clan of nomads who have dedicated their lives and their childrens' lives to keeping my private key safe in perpetuity!"
"Didn't you know?" the bartender asks. "The components of the signature are just very large numbers. The sign of one of the signature components can be changed, from positive to negative, or negative to positive, and the signature will remain valid. Anyone can do that, even if they don't know the private key. But because Bitcoin includes the signatures in the transaction when it's generating the txid, this little change also changes the txid." He or she chuckles. "They say they'll fix it by separating the signatures from the transaction body. They're saying that these kinds of signature malleability won't affect transaction ids anymore after they do this, but I bet I can get my good friend Jihan Wu to delay this 'SepSig' plan for a good while yet. Friendly guy, this Jihan Wu, it turns out all I had to do was slip him 51 drinks and he was willing to mine a tx with the signature signs flipped." His or her grin widens. "I'm afraid your backoff transaction won't work anymore, since it spends a txid that is not existent and will never be confirmed. So here's the deal. You pay me 99% of the funds in the funding transaction, in exchange for me signing the transaction that spends with the txid that you see onchain. Refuse, and you lose 100% of the funds and every other HODLer, including me, benefits from the reduction in coin supply. Accept, and you get to keep 1%. I lose nothing if you refuse, so I won't care if you do, but consider the difference of getting zilch vs. getting 1% of your funds." His or her eyes glow. "GENUFLECT RIGHT NOW."
Lesson learned?

CLTV-protected Spilman Channels

Using CLTV for the backoff branch.
This variation is simply Spilman channels, but with the backoff transaction replaced with a backoff branch in the SCRIPT you pay to. It only became possible after OP_CHECKLOCKTIMEVERIFY (CLTV) was enabled in 2015.
Now as we saw in the Spilman Channels discussion, transaction malleability means that any pre-signed offchain transaction can easily be invalidated by flipping the sign of the signature of the funding transaction while the funding transaction is not yet confirmed.
This can be avoided by simply putting any special requirements into an explicit branch of the Bitcoin SCRIPT. Now, the backoff branch is supposed to create a maximum lifetime for the payment channel, and prior to the introduction of OP_CHECKLOCKTIMEVERIFY this could only be done by having a pre-signed nLockTime transaction.
With CLTV, however, we can now make the branches explicit in the SCRIPT that the funding transaction pays to.
Instead of paying to a 2-of-2 in order to set up the funding transaction, you pay to a SCRIPT which is basically "2-of-2, OR this singlesig after a specified lock time".
With this, there is no backoff transaction that is pre-signed and which refers to a specific txid. Instead, you can create the backoff transaction later, using whatever txid the funding transaction ends up being confirmed under. Since the funding transaction is immutable once confirmed, it is no longer possible to change the txid afterwards.

Todd Micropayment Networks

The old hub-spoke model (that isn't how LN today actually works).
One of the more direct predecessors of the Lightning Network was the hub-spoke model discussed by Peter Todd. In this model, instead of payers directly having channels to payees, payers and payees connect to a central hub server. This allows any payer to pay any payee, using the same channel for every payee on the hub. Similarly, this allows any payee to receive from any payer, using the same channel.
Remember from the above Spilman example? When you open a channel to the bartender, you have to wait around for the funding tx to confirm. This will take an hour at best. Now consider that you have to make channels for everyone you want to pay to. That's not very scalable.
So the Todd hub-spoke model has a central "clearing house" that transport money from payers to payees. The "Moonbeam" project takes this model. Of course, this reveals to the hub who the payer and payee are, and thus the hub can potentially censor transactions. Generally, though, it was considered that a hub would more efficiently censor by just not maintaining a channel with the payer or payee that it wants to censor (since the money it owned in the channel would just be locked uselessly if the hub won't process payments to/from the censored user).
In any case, the ability of the central hub to monitor payments means that it can surveill the payer and payee, and then sell this private transactional data to third parties. This loss of privacy would be intolerable today.
Peter Todd also proposed that there might be multiple hubs that could transport funds to each other on behalf of their users, providing somewhat better privacy.
Another point of note is that at the time such networks were proposed, only unidirectional (Spilman) channels were available. Thus, while one could be a payer, or payee, you would have to use separate channels for your income versus for your spending. Worse, if you wanted to transfer money from your income channel to your spending channel, you had to close both and reshuffle the money between them, both onchain activities.

Poon-Dryja Lightning Network

Bidirectional two-participant channels.
The Poon-Dryja channel mechanism has two important properties:
Both the original Satoshi and the two Spilman variants are unidirectional: there is a payer and a payee, and if the payee wants to do a refund, or wants to pay for a different service or product the payer is providing, then they can't use the same unidirectional channel.
The Poon-Dryjam mechanism allows channels, however, to be bidirectional instead: you are not a payer or a payee on the channel, you can receive or send at any time as long as both you and the channel counterparty are online.
Further, unlike either of the Spilman variants, there is no time limit for the lifetime of a channel. Instead, you can keep the channel open for as long as you want.
Both properties, together, form a very powerful scaling property that I believe most people have not appreciated. With unidirectional channels, as mentioned before, if you both earn and spend over the same network of payment channels, you would have separate channels for earning and spending. You would then need to perform onchain operations to "reverse" the directions of your channels periodically. Secondly, since Spilman channels have a fixed lifetime, even if you never used either channel, you would have to periodically "refresh" it by closing it and reopening.
With bidirectional, indefinite-lifetime channels, you may instead open some channels when you first begin managing your own money, then close them only after your lawyers have executed your last will and testament on how the money in your channels get divided up to your heirs: that's just two onchain transactions in your entire lifetime. That is the potentially very powerful scaling property that bidirectional, indefinite-lifetime channels allow.
I won't discuss the transaction structure needed for Poon-Dryja bidirectional channels --- it's complicated and you can easily get explanations with cute graphics elsewhere.
There is a weakness of Poon-Dryja that people tend to gloss over (because it was fixed very well by RustyReddit):
Another thing I want to emphasize is that while the Lightning Network paper and many of the earlier presentations developed from the old Peter Todd hub-and-spoke model, the modern Lightning Network takes the logical conclusion of removing a strict separation between "hubs" and "spokes". Any node on the Lightning Network can very well work as a hub for any other node. Thus, while you might operate as "mostly a payer", "mostly a forwarding node", "mostly a payee", you still end up being at least partially a forwarding node ("hub") on the network, at least part of the time. This greatly reduces the problems of privacy inherent in having only a few hub nodes: forwarding nodes cannot get significantly useful data from the payments passing through them, because the distance between the payer and the payee can be so large that it would be likely that the ultimate payer and the ultimate payee could be anyone on the Lightning Network.
Lessons learned?

Future

After LN, there's also the Decker-Wattenhofer Duplex Micropayment Channels (DMC). This post is long enough as-is, LOL. But for now, it uses a novel "decrementing nSequence channel", using the new relative-timelock semantics of nSequence (not the broken one originally by Satoshi). It actually uses multiple such "decrementing nSequence" constructs, terminating in a pair of Spilman channels, one in both directions (thus "duplex"). Maybe I'll discuss it some other time.
The realization that channel constructions could actually hold more channel constructions inside them (the way the Decker-Wattenhofer puts a pair of Spilman channels inside a series of "decrementing nSequence channels") lead to the further thought behind Burchert-Decker-Wattenhofer channel factories. Basically, you could host multiple two-participant channel constructs inside a larger multiparticipant "channel" construct (i.e. host multiple channels inside a factory).
Further, we have the Decker-Russell-Osuntokun or "eltoo" construction. I'd argue that this is "nSequence done right". I'll write more about this later, because this post is long enough.
Lessons learned?
submitted by almkglor to Bitcoin [link] [comments]

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