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1. What is Bitcoin (BTC)?
2. Bitcoin’s core featuresFor a more beginner’s introduction to Bitcoin, please visit Binance Academy’s guide to Bitcoin.
Unspent Transaction Output (UTXO) modelA 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.
Nakamoto consensusIn 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.
Block productionThe 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.
Block time and mining difficultyBlock 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.
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:
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 NetworkLightning 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.
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 proposalElliptic Curve Digital Signature Algorithm (“ECDSA”) signatures are used to sign transactions on the Bitcoin blockchain.
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.
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 distributionThe 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.
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Hi everyone! Happy 4th of July to all. We are super behind on the weekly updates. So, starting today, I will be putting up updates every day for the next 5 days to get completely caught up with the latest at Parachute + partners. Are you ready? Here we go. Your week at Parachute (24 May – 30 May’19):submitted by abhijoysarkar to ParachuteToken [link] [comments]
Parachute’s Tip Room now has a gaming channel. Jason’s plant betting competition is still not off to a start since leaves haven’t sprouted yet. Congrats to OG Parachuter Toadie for completing his degree at uni this week! Victor’s trivia in ParJar was based on ancient Greece. 50k PAR were given out. Chris started an NBA Finals betting game. A ton of PAR to be won. Nilzinho’s Big Chili Race just started as well! 8 participants are betting on 8 chili plants to get to 50 cm first. All or nothing. 400k PAR pot. Jeezums!
Thank you Veronique for the leaderboard!
Parachute + Uptrennd brainstorm session for this week was about Big Co. entering crypto. Uptrennd’s twitter and Instagram handles have been updated. The roadmap was published this week too. Plus the first 1UP listing announcement. Here’s looking ahead to more! Birdchain’s roadmap was released this week as well. Check it out! This was followed by an AMA with the management of Birdchain. Their article on how to earn crypto is also pretty nifty for folks new to crypto. Meme Factory assets were added to the OpenSea Crypto marketplace. Woot! The District Weekly and Dev Update cover more news from the District0xverse like perfecting the infinite scroll, debugging DANK faucet etc.
Birdchain roadmap for 2019
Check out HYDRO’s tweet thread where they explain how their blockchain based identity solution (Snowflake) helps make Financial Services more robust. The various HYDRO whitepapers can be found on their GitHub. And here’s the team that’s making all of this possible. The Opacity closed beta was opened up for everyone for this week as the team prepares for the launch of 1.0 next week. Youtubers Bitcoin for Beginners, Crypto Revolution and CryptosRUs reviewed Opacity this week as well. The project announced a partnership with QLC Chain to work on storage solutions in communication systems. New to Opacity? Check out this quick intro. Cryzen Code Studio users, make sure to check out the latest article from Shuvro on why MACD based trades rule! There’s also a strategy attached to the article. We created a Cryzen blog on publish0x and Uptrennd as well.
That is a 107.45% return on a backtest. Say what!
Dash is now live in the Ethos Universal Wallet. Sweet! Last week’s AMA transcript can be seen here. Don’t forget to have a look at the ETHOS blockchain education course. It is a great startingpoint for crypto entrants. Fantom’s proposal to list FTM on Binance Dex was accepted. COTI announced a partnership with Fantom for research on DAG. That Martini Guy’s FTM feature video also came out this week. Also, don't forget to check out this article on the team’s recent networking outreach in Dubai. Plus, a new article series called Fantom Archive was started which focuses on the project’s "philosophy and technical architecture". The first set of articles are based on architecture, on-chain data storage, virtual machine and distributed computing. P.S. all the literature is highly technical but detailed. The weekly aXpire burn event saw another 10k AXPR turning to dust. Rohit and my article on blockchain regulations hit the stands this week as well. We wrote it as freelancers on MatchBX. Shoutout to Victor who has conducted several trivias in aXpire (in addition to more in ParJar) to keep the community engaged. We had one this week as well.
Fantom in Dubai
BOMB’s Zachary Dash wrote a hugely popular article on the BOMB journey so far. Thanks a ton for the ParJar shoutout Zachary! The article was even featured on Medium. The Bombassadors program started this week. Dash also sat down for an AMA + Interview with PAC Coin and BOMB got featured by YouTuber Crypto Tips in one of her videos. Check out WednesdayCoin’s weekly airdrop post to learn about the latest updates at WednesdayClub. Complete information on the WED token should now reflect inside imToken after Mike’s resubmission. Horizon State's token, HST, got listed on Blockbid. We had the final Financial Friday competition this week at 2gether. Sad. I know. Hopefully there will be other fun events again. 2gether crypto debit card was featured in CCN albeit with some factual errors as pointed out by Cyril. CEO Ramon’s article on the startup scene in France was also published this week. His thoughts on Satoshi’s identity were also shared in a Forbes article. Also, check out 2gether’s tweet on the latest updates in the app. That’s right, QTUM is now supported on the platform.
That’s it for this week at Parachute. Thank you for taking the time. See you tomorrow with another update. Peace!
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✅Overstock and Bitsy to Launch Their Bitcoin Wallet Next Week
The beta version of the Bitsy Bitcoin wallet will be available to download, for free, from the 12th of November. The platform is owned by the bullish U.S. retailer, Overstock. While initially making a name for themselves as an e-retailer, U.S.-based Overstock has shifted gears to focus more on blockchain technology and virtual currencies.
🔸Inclusion of Pro-Blockchain Gibraltar Minister in DC Panel Positive Sign for US Regulation
The Gibraltar Minister for Commerce, Albert Isola, has urged the DC Fintech Week panel to ”collectively strive towards fintech excellence” while sharing his views on regulatory competition in the blockchain industry. The inclusion of a well-known pro-blockchain speaker on the mainstream panel discussion is a promising indicator for the future of the technology in the US.
🔸Scalability: A Big Obstacle for the Cryptocurrency Ecosystem
31st of October, 2018, marked a landmark for cryptocurrencies – it was the tenth anniversary of the Bitcoin whitepaper, meaning cryptocurrencies have turned ten years old. A lot has been achieved over the past ten years – but there are many goals which have been left unfulfilled. This is particularly in reference to the issues of scalability and adoption, problems which continue to haunt the cryptocurrency ecosystem.
Scalability is a problem which wasn’t really envisioned in the early days of cryptocurrencies.
🔸Nakamoto’s Colleague, Donor of BTC 15,678 Says Bitcoin’s Survival ”No Question”
Jeff Garzik, a close colleague of Satoshi Nakamoto, said that although Bitcoin may not have reached its original goal of being used as a private currency, there is ”no question” of its survival.
Garzik, who until 2014 was the third largest contributor to Bitcoin’s code, was responsible for giving away a developer’s bounty to encourage more workers onto the software in the early days of the currency, around seven years ago. He donated 15,678 bitcoins of his own funds, valued at over USD 100 million in today’s prices.
🔸BitMEX to Settle Contracts using Bitcoin Cash ABC After BCH Hard Fork
With the Bitcoin Cash (BCH) hard fork date quickly approaching, plenty of cryptocurrency enthusiasts are anxious as to how many crypto exchanges will support the event. We have had the likes of Binance, Coinbase, Ledger and BitMEX announcing their plans to handle the hard fork. In the case of the latter exchange, the team has just announced additional information as to how the platform will support the hard-fork on the 15th of November.
🔸Bitcoin Could Reach $250k by 2023 Says Tim Draper
The cryptocurrency investor and billionaire Trim Draper said that his Bitcoin price prediction for the next years remains solid. Draper believes that Bitcoin is going to reach $250,000 dollars by 2022. Although the market has been in a bear trend in 2018, he confirms this Bitcoin (BTC) price prediction.
🔸Shapeshift’s CEO about Vitalik Buterin: “Ethereum Is Better Because He’s Involved.”
In a short conversation with Ran Neuner, host of CNBC’s Crypto Trader, Eric Vorhees, CEO of ShapeShift shared his views on the future of cryptocurrencies and blockchain technologies.
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12 years ago, Satoshi Nakamoto decided to let the world in on Bitcoin, the peer-to-peer electronic cash system that took the world by storm. The very first time Nakamoto published the paper was at ... Satoshi Nakamoto published the Bitcoin whitepaper on October 31st, 2008 with the title – Bitcoin: A Peer-to-Peer Electronic Cash System. This article is a summary of this whitepaper for the non-technical bitcoin investors. The identity of Bitcoin creator (or creators) Satoshi Nakamoto is still one of the most highly debated questions in the crypto space today. However, a new research report is suggesting that the ... Tomorrow marks 12 years since Satoshi Nakamoto distributed a link to a whitepaper entitled Bitcoin: A Peer-to-Peer Electronic Cash System via a cypherpunk cryptography mailing list, and the world has never been the same since. As the first-ever cryptocurrency is about to celebrate the twelfth ... With the title of “Bitcoin P2P e-cash paper and this cryptic description attached, at exactly 2:10 pm Eastern Standard time on 31 October 2008, the world of money forever changed. This was the moment the mysterious “Satoshi Nakamoto” submitted the Bitcoin whitepaper to the Cryptography Mailing List of metzdowd.com , a messaging service popular with cypherpunks at the time. The Bitcoin white paper has been written by Satoshi Nakamoto, the anonymous bitcoin creator who created the decentralized Bitcoin Network. The blockchain technology he describes in this article is not new, but using the combination of blockchain, cryptocurrency and proof of work resulted in the largest cryptocurrency that is still dominating the cryptocurrency market today. Nine years ago today the anonymous creator of the 'Internet of Money,' Satoshi Nakamoto, released the Bitcoin white paper. Es ist nun 12 Jahre her, dass Satoshi Nakamoto einen Link zu einem Whitepaper mit dem Titel “Bitcoin: A Peer-to-Peer Electronic Cash System” (Bitcoin: Ein elektronisches Peer-to-Peer-Geldsystem) über eine Cypherpunk-Verschlüsselungs-Mailingliste verteilt hat – und die Welt ist seither nicht mehr dieselbe. Satoshi Nakamoto is a pseudonym that was used by the Bitcoin’s creator in email communications, forum posts and publications such as the Bitcoin Whitepaper. For all we know, this could have been a male, a female or a group of persons. The name is clearly of Japanese origin, but since the person was writing in perfect English, many believe that Satoshi comes from an English-speaking country. The first cryptocurrency that came into existence, Bitcoin was conceptualized in a whitepaper published in 2008 by someone who uses the pseudonym Satoshi Nakamoto. More than a decade after its creation on January 3, 2009, Bitcoin is currently the most widely known and used cryptocurrency. Buy Bitcoin here
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Today we look at Satoshi Nakamoto. No one actually knows who is behind the whitepaper and creation of Bitcoin. Was it one man or a group? Is he deceased or alive? Is it a he or a she? So much is ... The #Bitcoin White Paper (By Satoshi Nakamoto) Narrated by The #Cryptocurrency Portal on Friday May 31st, 2019 #Bitcoin: A Peer-to-Peer Electronic Cash System For those that are better audio ... Satoshi Nakamoto's Bitcoin Whitepaper - Explained and Simplified - Duration: 9:09. Altcoin Buzz 10,976 views. 9:09. Joe Rogan Live Podcast: Blockchain, Bitcoin Halving, BTC 2020, Crypto JoeRogan ... A deep dive on the Bitcoin whitepaper. We read over and try to elaborate on each section. https://bitcoin.org/bitcoin.pdf ===== #sellou... Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto [email protected] www.bitcoin.org Abstract. A purely peer-to-peer version of electronic cash w... Good Morning Music VR 360° Positive Vibrations - 528Hz The Deepest Healing - Boost Your Vibration - Duration: 2:00:01. Nature Healing Society Recommended for you. 360° We have been getting tons of questions about Satoshi and his bitcoin whitepaper. So in todays video, we thought it would be a good idea to simplify and expla... #bitcoin #whitepaper #satoshi Kolejny odcinek z serii Bitcoin Whitepaper, w którym ponownie czytam manifest stworzony przez Satoshi Nakamoto. Dzisiaj czytani...