# The difference between traditional currency and Bitcoin

• The difference between traditional currency and Bitcoin
• The Bitcoin Volatility Index Price and More
• Frances Coppola: Bitcoin-Like Scarcity Would Be a Disaster ...
• Why 'stable coins' are no answer to bitcoin's instability ...
##### Ultimate glossary of crypto currency terms, acronyms and abbreviations

I thought it would be really cool to have an ultimate guide for those new to crypto currencies and the terms used. I made this mostly for beginner’s and veterans alike. I’m not sure how much use you will get out of this. Stuff gets lost on Reddit quite easily so I hope this finds its way to you. Included in this list, I have included most of the terms used in crypto-communities. I have compiled this list from a multitude of sources. The list is in alphabetical order and may include some words/terms not exclusive to the crypto world but may be helpful regardless.
2FA
Two factor authentication. I highly advise that you use it.
51% Attack:
A situation where a single malicious individual or group gains control of more than half of a cryptocurrency network’s computing power. Theoretically, it could allow perpetrators to manipulate the system and spend the same coin multiple times, stop other users from completing blocks and make conflicting transactions to a chain that could harm the network.
A unique string of numbers and letters (both upper and lower case) used to send, receive or store cryptocurrency on the network. It is also the public key in a pair of keys needed to sign a digital transaction. Addresses can be shared publicly as a text or in the form of a scannable QR code. They differ between cryptocurrencies. You can’t send Bitcoin to an Ethereum address, for example.
Altcoin (alternative coin): Any digital currency other than Bitcoin. These other currencies are alternatives to Bitcoin regarding features and functionalities (e.g. faster confirmation time, lower price, improved mining algorithm, higher total coin supply). There are hundreds of altcoins, including Ether, Ripple, Litecoin and many many others.
AIRDROP:
An event where the investors/participants are able to receive free tokens or coins into their digital wallet.
AML: Defines Anti-Money Laundering laws**.**
ARBITRAGE:
Getting risk-free profits by trading (simultaneous buying and selling of the cryptocurrency) on two different exchanges which have different prices for the same asset.
Ashdraked:
Being Ashdraked is essentially a more detailed version of being Zhoutonged. It is when you lose all of your invested capital, but you do so specifically by shorting Bitcoin. The expression “Ashdraked” comes from a story of a Romanian cryptocurrency investor who insisted upon shorting BTC, as he had done so successfully in the past. When the price of BTC rose from USD 300 to USD 500, the Romanian investor lost all of his money.
ATH (All Time High):
The highest price ever achieved by a cryptocurrency in its entire history. Alternatively, ATL is all time low
Bearish:
A tendency of prices to fall; a pessimistic expectation that the value of a coin is going to drop.
Bear trap:
A manipulation of a stock or commodity by investors.
Bitcoin:
The very first, and the highest ever valued, mass-market open source and decentralized cryptocurrency and digital payment system that runs on a worldwide peer to peer network. It operates independently of any centralized authorities
Bitconnect:
One of the biggest scams in the crypto world. it was made popular in the meme world by screaming idiot Carlos Matos, who infamously proclaimed," hey hey heeeey” and “what's a what's a what's up wasssssssssuuuuuuuuuuuuup, BitConneeeeeeeeeeeeeeeeeeeeeeeect!”. He is now in the mentally ill meme hall of fame.
Block:
A package of permanently recorded data about transactions occurring every time period (typically about 10 minutes) on the blockchain network. Once a record has been completed and verified, it goes into a blockchain and gives way to the next block. Each block also contains a complex mathematical puzzle with a unique answer, without which new blocks can’t be added to the chain.
Blockchain:
An unchangeable digital record of all transactions ever made in a particular cryptocurrency and shared across thousands of computers worldwide. It has no central authority governing it. Records, or blocks, are chained to each other using a cryptographic signature. They are stored publicly and chronologically, from the genesis block to the latest block, hence the term blockchain. Anyone can have access to the database and yet it remains incredibly difficult to hack.
Bullish:
A tendency of prices to rise; an optimistic expectation that a specific cryptocurrency will do well and its value is going to increase.
BTFD:
Buy the fucking dip. This advise was bestowed upon us by the gods themselves. It is the iron code to crypto enthusiasts.
Bull market:
A market that Cryptos are going up.
Consensus:
An agreement among blockchain participants on the validity of data. Consensus is reached when the majority of nodes on the network verify that the transaction is 100% valid.
Crypto bubble:
The instability of cryptocurrencies in terms of price value
Cryptocurrency:
A type of digital currency, secured by strong computer code (cryptography), that operates independently of any middlemen or central authoritie
Cryptography:
The art of converting sensitive data into a format unreadable for unauthorized users, which when decoded would result in a meaningful statement.
Cryptojacking:
The use of someone else’s device and profiting from its computational power to mine cryptocurrency without their knowledge and consent.
Crypto-Valhalla:
When HODLers(holders) eventually cash out they go to a place called crypto-Valhalla. The strong will be separated from the weak and the strong will then be given lambos.
DAO:
Decentralized Autonomous Organizations. It defines A blockchain technology inspired organization or corporation that exists and operates without human intervention.
Dapp (decentralized application):
An open-source application that runs and stores its data on a blockchain network (instead of a central server) to prevent a single failure point. This software is not controlled by the single body – information comes from people providing other people with data or computing power.
Decentralized:
A system with no fundamental control authority that governs the network. Instead, it is jointly managed by all users to the system.
Desktop wallet:
A wallet that stores the private keys on your computer, which allow the spending and management of your bitcoins.
DILDO:
Long red or green candles. This is a crypto signal that tells you that it is not favorable to trade at the moment. Found on candlestick charts.
Digital Signature:
An encrypted digital code attached to an electronic document to prove that the sender is who they say they are and confirm that a transaction is valid and should be accepted by the network.
Double Spending:
An attack on the blockchain where a malicious user manipulates the network by sending digital money to two different recipients at exactly the same time.
DYOR:
Encryption:
Converting data into code to protect it from unauthorized access, so that only the intended recipient(s) can decode it.
Eskrow:
the practice of having a third party act as an intermediary in a transaction. This third party holds the funds on and sends them off when the transaction is completed.
Ethereum:
Ethereum is an open source, public, blockchain-based platform that runs smart contracts and allows you to build dapps on it. Ethereum is fueled by the cryptocurrency Ether.
Exchange:
A platform (centralized or decentralized) for exchanging (trading) different forms of cryptocurrencies. These exchanges allow you to exchange cryptos for local currency. Some popular exchanges are Coinbase, Bittrex, Kraken and more.
Faucet:
A website which gives away free cryptocurrencies.
Fiat money:
Fiat currency is legal tender whose value is backed by the government that issued it, such as the US dollar or UK pound.
Fork:
A split in the blockchain, resulting in two separate branches, an original and a new alternate version of the cryptocurrency. As a single blockchain forks into two, they will both run simultaneously on different parts of the network. For example, Bitcoin Cash is a Bitcoin fork.
FOMO:
Fear of missing out.
Frictionless:
A system is frictionless when there are zero transaction costs or trading retraints.
FUD:
Fear, Uncertainty and Doubt regarding the crypto market.
Gas:
A fee paid to run transactions, dapps and smart contracts on Ethereum.
Halving:
A 50% decrease in block reward after the mining of a pre-specified number of blocks. Every 4 years, the “reward” for successfully mining a block of bitcoin is reduced by half. This is referred to as “Halving”.
Hardware wallet:
Physical wallet devices that can securely store cryptocurrency maximally. Some examples are Ledger Nano S**,** Digital Bitbox and more**.**
Hash:
The process that takes input data of varying sizes, performs an operation on it and converts it into a fixed size output. It cannot be reversed.
Hashing:
The process by which you mine bitcoin or similar cryptocurrency, by trying to solve the mathematical problem within it, using cryptographic hash functions.
HODL:
A Bitcoin enthusiast once accidentally misspelled the word HOLD and it is now part of the bitcoin legend. It can also mean hold on for dear life.
ICO (Initial Coin Offering):
A blockchain-based fundraising mechanism, or a public crowd sale of a new digital coin, used to raise capital from supporters for an early stage crypto venture. Beware of these as there have been quite a few scams in the past.
John mcAfee:
A man who will one day eat his balls on live television for falsely predicting bitcoin going to 100k. He has also become a small meme within the crypto community for his outlandish claims.
JOMO:
Joy of missing out. For those who are so depressed about missing out their sadness becomes joy.
KYC:
Lambo:
This stands for Lamborghini. A small meme within the investing community where the moment someone gets rich they spend their earnings on a lambo. One day we will all have lambos in crypto-valhalla.
Ledger:
Away from Blockchain, it is a book of financial transactions and balances. In the world of crypto, the blockchain functions as a ledger. A digital currency’s ledger records all transactions which took place on a certain block chain network.
Leverage:
Trading with borrowed capital (margin) in order to increase the potential return of an investment.
Liquidity:
The availability of an asset to be bought and sold easily, without affecting its market price.
of the coins.
The trading of assets or securities bought with borrowed money.
Market cap/MCAP:
A short-term for Market Capitalization. Market Capitalization refers to the market value of a particular cryptocurrency. It is computed by multiplying the Price of an individual unit of coins by the total circulating supply.
Miner:
A computer participating in any cryptocurrency network performing proof of work. This is usually done to receive block rewards.
Mining:
The act of solving a complex math equation to validate a blockchain transaction using computer processing power and specialized hardware.
Mining contract:
A method of investing in bitcoin mining hardware, allowing anyone to rent out a pre-specified amount of hashing power, for an agreed amount of time. The mining service takes care of hardware maintenance, hosting and electricity costs, making it simpler for investors.
Mining rig:
A computer specially designed for mining cryptocurrencies.
Mooning:
A situation the price of a coin rapidly increases in value. Can also be used as: “I hope bitcoin goes to the moon”
Node:
Any computing device that connects to the blockchain network.
Open source:
The practice of sharing the source code for a piece of computer software, allowing it to be distributed and altered by anyone.
OTC:
Over the counter. Trading is done directly between parties.
P2P (Peer to Peer):
A type of network connection where participants interact directly with each other rather than through a centralized third party. The system allows the exchange of resources from A to B, without having to go through a separate server.
Paper wallet:
A form of “cold storage” where the private keys are printed onto a piece of paper and stored offline. Considered as one of the safest crypto wallets, the truth is that it majors in sweeping coins from your wallets.
Pre mining:
The mining of a cryptocurrency by its developers before it is released to the public.
Proof of stake (POS):
A consensus distribution algorithm which essentially rewards you based upon the amount of the coin that you own. In other words, more investment in the coin will leads to more gain when you mine with this protocol In Proof of Stake, the resource held by the “miner” is their stake in the currency.
PROOF OF WORK (POW) :
The competition of computers competing to solve a tough crypto math problem. The first computer that does this is allowed to create new blocks and record information.” The miner is then usually rewarded via transaction fees.
Protocol:
A standardized set of rules for formatting and processing data.
Public key / private key:
A cryptographic code that allows a user to receive cryptocurrencies into an account. The public key is made available to everyone via a publicly accessible directory, and the private key remains confidential to its respective owner. Because the key pair is mathematically related, whatever is encrypted with a public key may only be decrypted by its corresponding private key.
Pump and dump:
Massive buying and selling activity of cryptocurrencies (sometimes organized and to one’s benefit) which essentially result in a phenomenon where the significant surge in the value of coin followed by a huge crash take place in a short time frame.
Recovery phrase:
A set of phrases you are given whereby you can regain or access your wallet should you lose the private key to your wallets — paper, mobile, desktop, and hardware wallet. These phrases are some random 12–24 words. A recovery Phrase can also be called as Recovery seed, Seed Key, Recovery Key, or Seed Phrase.
REKT:
Referring to the word “wrecked”. It defines a situation whereby an investor or trader who has been ruined utterly following the massive losses suffered in crypto industry.
Ripple:
An alternative payment network to Bitcoin based on similar cryptography. The ripple network uses XRP as currency and is capable of sending any asset type.
ROI:
Return on investment.
Safu:
A crypto term for safe popularized by the Bizonnaci YouTube channel after the CEO of Binance tweeted
“Funds are safe."
“the exchage I use got hacked!”“Oh no, are your funds safu?”
“My coins better be safu!”

Sats/Satoshi:
The smallest fraction of a bitcoin is called a “satoshi” or “sat”. It represents one hundred-millionth of a bitcoin and is named after Satoshi Nakamoto.
Satoshi Nakamoto:
This was the pseudonym for the mysterious creator of Bitcoin.
Scalability:
The ability of a cryptocurrency to contain the massive use of its Blockchain.
Sharding:
A scaling solution for the Blockchain. It is generally a method that allows nodes to have partial copies of the complete blockchain in order to increase overall network performance and consensus speeds.
Shitcoin:
Coin with little potential or future prospects.
Shill:
Spreading buzz by heavily promoting a particular coin in the community to create awareness.
Short position:
Selling of a specific cryptocurrency with an expectation that it will drop in value.
The online marketplace where drugs and other illicit items were traded for Bitcoin. This marketplace is using accessed through “TOR”, and VPNs. In October 2013, a Silk Road was shut down in by the FBI.
Smart Contract:
Certain computational benchmarks or barriers that have to be met in turn for money or data to be deposited or even be used to verify things such as land rights.
Software Wallet:
A crypto wallet that exists purely as software files on a computer. Usually, software wallets can be generated for free from a variety of sources.
Solidity:
A contract-oriented coding language for implementing smart contracts on Ethereum. Its syntax is similar to that of JavaScript.
Stable coin:
A cryptocoin with an extremely low volatility that can be used to trade against the overall market.
Staking:
Staking is the process of actively participating in transaction validation (similar to mining) on a proof-of-stake (PoS) blockchain. On these blockchains, anyone with a minimum-required balance of a specific cryptocurrency can validate transactions and earn Staking rewards.
Surge:
When a crypto currency appreciates or goes up in price.
Tank:
The opposite of mooning. When a coin tanks it can also be described as crashing.
Tendies
For traders , the chief prize is “tendies” (chicken tenders, the treat an overgrown man-child receives for being a “Good Boy”) .
Token:
A unit of value that represents a digital asset built on a blockchain system. A token is usually considered as a “coin” of a cryptocurrency, but it really has a wider functionality.
TOR: “The Onion Router” is a free web browser designed to protect users’ anonymity and resist censorship. Tor is usually used surfing the web anonymously and access sites on the “Darkweb”.
Transaction fee:
An amount of money users are charged from their transaction when sending cryptocurrencies.
Volatility:
A measure of fluctuations in the price of a financial instrument over time. High volatility in bitcoin is seen as risky since its shifting value discourages people from spending or accepting it.
Wallet:
A file that stores all your private keys and communicates with the blockchain to perform transactions. It allows you to send and receive bitcoins securely as well as view your balance and transaction history.
Whale:
An investor that holds a tremendous amount of cryptocurrency. Their extraordinary large holdings allow them to control prices and manipulate the market.
Whitepaper:

A comprehensive report or guide made to understand an issue or help decision making. It is also seen as a technical write up that most cryptocurrencies provide to take a deep look into the structure and plan of the cryptocurrency/Blockchain project. Satoshi Nakamoto was the first to release a whitepaper on Bitcoin, titled “Bitcoin: A Peer-to-Peer Electronic Cash System” in late 2008.
And with that I finally complete my odyssey. I sincerely hope that this helped you and if you are new, I welcome you to crypto. If you read all of that I hope it increased, you in knowledge.
my final definition:
Crypto-Family:
A collection of all the HODLers and crypto fanatics. A place where all people alike unite over a love for crypto.
We are all in this together as we pioneer the new world that is crypto currency. I wish you a great day and Happy HODLing.
-u/flacciduck
feel free to comment words or terms that you feel should be included or about any errors I made.

https://preview.redd.it/a7jv4azk86u51.jpg?width=1600&format=pjpg&auto=webp&s=e4a4dbb5afacd5747076beaa59e6343b805c3392

# ABSTRACT

Aryacoin is a new cryptocurrency, which allows for decentralized, peer to peer transactions of electronic cash. It is like Bitcoin and Litecoin, but the trading of the coin occurs on sales platforms that have no restriction to use. Further, it was created with the goal of addressing the double spend issues of Bitcoin and does so using a timestamp server to verify transactions. It works by taking the hash of a block of items to be timestamped and widely publishing the hash. The timestamp proves that the data must have existed at the time in order to get the hash. Each timestamp then includes the previous timestamp in its hash, forming a chain.
The Aryacoin team is continuously developing new use cases for the coin, including exchanges where users can exchange the coins without any fees or restrictions, and offline options where the coins can be bought and sold for cash. The coins can also be used on the company’s other platform, mrdigicoin.io. Along with the coin, there is a digital wallet that can be created and controlled by the user entirely, with no control being retained by the Aryacoin team.

# 1.INTRODUCTION

The concept of Blockchain first came to fame in October 2008, as part of a proposal for Bitcoin, with the aim to create P2P money without banks. Bitcoin introduced a novel solution to the age-old human problem of trust. The underlying blockchain technology allows us to trust the outputs of the system without trusting any actor within it. People and institutions who do not know or trust each other, reside in different countries, are subject to different jurisdictions, and who have no legally binding agreements with each other, can now interact over the Internet without the need for trusted third parties like banks, Internet platforms, or other types of clearing institutions.
When bitcoin was launched it was revolutionary allowing people to transfer money to anytime and anywhere with very low transaction fees . It was decentralized and their is no third party involved in the transaction , only the sender and receiver were involved.
This paper provide a solution to the double-spending problem using a peer-to-peer distributed timestamp server to generate computational proof of the chronological order of transactions.The system is secure as long as honest nodes collectively control more CPU power than any cooperating group of attacker nodes. Bitcoin was made so that it would not be controlled or regulated but now exchanges and governments are regulating bitcoin and other cryptocurrencies at every step. Aryacoin was developed to overcome these restrictions on a free currency.
Aryacoin is a new age cryptocurrency, which withholds the original principle on which the concept of cryptocurrency was established. Combining the best in blockchain technology since the time of its creation, Aryacoin strives to deliver the highest trading and mining standards for its community.

Aryacoin is a new age cryptocurrency, which withholds the original principle on which the concept of cryptocurrency was established. Combining the best in blockchain technology since the time of its creation, Aryacoin strives to deliver the highest trading and mining standards for its community.
Aryacoin is a blockchain based project that allows users to access their wallet on the web and mobile browsers, using their login details.
Aryacoin can be mined; it also can be exchanged by other digital currencies in several world-famous exchanges such as Hitbtc, CoinEx, P2pb2b, WhiteBit, Changelly and is also listed in reputable wallets such as Coinomi and Guarda.
Aryacoin is a coin, which can be used by anyone looking to use cryptocurrency which allows them to keep their privacy even when buying/selling the coin along with while using the coin during transactions. Proof of work and cryptographic hashes allows transactions to verified.
Stable Fee Per AYA is a unique feature of Aryacoin, so by increasing the amount or volume of the transaction, there is no change in the fee within the network, which means that the fee for sending an amount less than 1 AYA is equal to several hundred million AYA. Another unique feature of Aryacoin is the undetectability of transactions in Explorer, such as the DASH and Monero, of course, this operation is unique to Aryacoin.
Using Aryacoin digital currency, like other currencies, international transactions can be done very quickly and there are no limitations in this area as the creators claim.
Aryacoin aims to allow users to access the Aryacoin wallet via the web and mobile browsers using their login details.
Aryacoin is a peer-to-peer electronic cash system that enables users to send and receive payments directly from one party to another, and allow them to transfer funds across borders with no restriction or third party involvement. The blockchain-based system embraces the digital signature, which prevents double spending and low transfer fees, which enables users to transfer huge amounts with very low fees. The proof-of-work consensus mechanism allows each transaction to be verified and confirmed, while anonymity enables users to use the coin anywhere at any time.
According to the website of the operation, each wallet is divided into 2 or more AYA wallet addresses for each transaction, and depending on the volume of the transaction block, the origin, and destination of transactions in the network can not be traced and displayed to the public.
In fact, each wallet in Aryacoin consists of a total of several wallets. The number of these wallets increases per transaction to increase both security and privacy. Aryacoin also uses the dPoW protocol. In the dPoW protocol, a second layer is added to the network to verify transactions, which makes “51% attack” impossible even with more than half of the network hash, and blocks whose Blockchain uses this second layer of security never run the risk of 51% attacks.
AYA has been listed on a number of crypto exchanges, unlike other main cryptocurrencies, it cannot be directly purchased with fiats money. However, You can still easily buy this coin by
first buying Bitcoin from any large exchanges and then transfer to the exchange that offers to trade this coin.

## 1.1.1 ARYACOIN HISTORY

Aryacoin (AYA) is a new cryptocurrency, which has been created by a group of Iranian developers, is an altcoin which allows for decentralised, peer to peer transactions of electronic cash without any fees whatsoever. Along with the coin, there is a digital wallet that can be created and managed by the user entirely, with no control being retained by the Aryacoin team.
Aryacoin’s founder, Kiumars Parsa, has been a fan of alternative currencies and particularly Bitcoin.
We see people from all around the world using Blockchain technology and the great benefits that came with it and it then that I decided to solve this puzzle for find a way of bringing the last missing piece to the jigsaw. The idea for Aryacoin was born.” Parsa said.
Parsa and his team of Iranian ex-pats not only persevered but expedited the project and just a year later, in the summer of 2019, the first version of Aryacoin was released. In 2020, Aryacoin is the first and only Iranian coin listed on CMC.
Parsa goes on to state that it is now the strength of the community that has invested in the coin that will ultimately drive its success, alongside its robust technology and appealing 0% network fees.
We have thousands of voices behind Aryacoin. People for the people make this coin. It is a massive shout out for democracy. This had made us base the whole team strategy on the benefits for both our users and our traders.
One key example is that the network fee on AYA Blockchain is 0%. Yes, absolutely nothing, which which differentiates us from other networks. What also differentiates us from other coins is that we have AYAPAY which is the first cryptocurrency Gateway in the world which does not save funds on third party storage with all funds being forwarded directly to any wallet address that the Gateway owner requests”.
So for the first time ever, and unlike other gateways, incoming funds will be saved on the users account with submitted withdrawal requests then made on the Gateway host website. In AYAPAY which has also been developed by the Aryacoin team, all funds without extra fees or extra costs will directly forwarded to users wallets. We have named this technology as CloudWithdrawal.
We are continuously challenging ourselves as it is a crowded marketplace. We are striving to have a safer Blockchain against 51% attacks, faster confirmations speeds of transactions, cheaper network fee, growing the market by cooperation with Top tier Exchangers.

## 1.1.2 ARYACOIN’S MAIN GOAL

Aryacoin’s main goal is to educate people and give them the freedom to use cryptocurrency in any way they want. Aryacoin empowers the users to transfer, pay, trade cryptocurrency from any country around the globe.
Platforms that have been created by Aryacoin Team, as well as those that will go live in future, operate on the same principle and exclude absolutely no one.

## 1.1.3 PROBLEM ARYACOIN SEEKS TO SOLVE

Aryacoin aims to provide a long-term solution to the problem of double spending, which is still common in the crypto market. The developers of the system have created a peer-to-peer distributed timestamp server that generates computational proof of the transactions as they occur.
Besides, the system remains secure provided honest nodes control more CPU power than any cooperating group of attacker nodes. While Bitcoin was designed not to be regulated or controlled, many exchanges and governments have put regulatory measures on the pioneer cryptocurrency at every step. Aryacoin aims to overcome these restrictions as a free digital currency.

## 1.1.4 BENEFITS OF USING ARYACOIN

Aryacoin solution offers the following benefits:
• Real-time update: whether you’re going on a holiday or a business trip, no problem. You can access your coins all over the world.
• Instant operations: Aryacoin makes it quite easy for you to use your digital wallet and perform various operations with it.
• Safe and secure: all your data is stored encrypted and can only be decrypted with your private key, seed, or password.
• Strong security: The system has no control over your wallet. You are 100% in charge of your wallet and funds.

## 1.1.5 ARYACOIN FEATURES

1. Anonymity
The coin provides decent level of anonymity for all its users. The users can send their transactions to any of the public nodes to be broadcasted , the transaction sent to the nodes should be signed by the private key of the sender address . This allows the users to use the coin anywhere any time , sending transactions directly to the node allows users from any place and country .
2. Real Life Usage
aryacoin’s team is continuously developing new and innovative ways to use the coins , they are currently developing exchanges where the users can exchange the coins without any fees and any restrictions . They also are currently developing other innovative technologies, which would allow users to spend our coins everywhere and anywhere.
3. Offline Exchanges
They are also working with different offline vendors which would enable them to buy and sell the coins directly to our users on a fixed/variable price this would allow easy buy/sell directly using cash . This would allow the coins to be accessible to users without any restrictions which most of the online exchanges have, also increase the value and number of users along with new ways to spend the coin. This would increase anonymity level of the
coin. In addition, introduce new users into the cryptomarket and technology. Creating a revolution, which educates people about crypto and introduce them to the crypto world, which introduces a completely new group of people into crypto and a move towards a Decentralized future!
4. Transactions
When it comes to transactions, Aryacoin embraces a chain of digital signatures, where each owner simply transfers the coin to the next person by digitally signing a hash of the previous transaction and the public key of the next owner. The recipient can then verify the signatures to confirm the chain of ownership. Importantly, Aryacoin comes with a trusted central authority that checks every transaction for double spending.
Aryacoin is the first and only Iranian digital currency that managed to obtain a trading license in other countries.
In collaboration with the foundation and financial giant Simplex, a major cryptocurrency company that has large companies such as Binance, P2P, Changelly, etc. Aryacoin has been licensed to enter the world’s major exchanges, as well as the possibility of purchasing AYA through Credit Cards, which will begin in the second half of 2020.
Also, the possibility of purchasing Aryacoin through Visa and MasterCard credit cards will be activated simultaneously inside the Aryacoin site. plus, in less than a year, AYA will be placed next to big names such as CoinCapMarket, Coinomi, P2P, Coinpayments and many other world-class brands today.

## 1.1.6 WHY CHOOSE ARYACOIN?

If you want to use a cryptocurrency that allows you to keep your privacy online even when buying and selling the coins, the Aryacoin team claims that AYA is the way to go. Aryacoin is putting in the work: with more ways to buy and sell, and fixing the issues that were present in the original Bitcoin, plus pushing the boundaries with innovative solutions in cryptocurrencies. You can get started using Aryacoin (AYA) payments simply by having a CoinPayments account!

## 1.1.7 ARYANA CENTRALIZED EXCHANGE

Aryana, the first Iranian exchange is a unique platform with the following features:
• The first real international Persian exchange that obtains international licenses and is listed in CoinMarketCap.
• The first Iranian exchange that has been cooperating with a legal and European exchange for 3 years.
• The possibility of trading in Tomans (available currency in Iran) at the user’s desired price and getting rid of the transaction prices imposed by domestic sites inside Iran.
• There is an internal fee payment plan by Iranian domestic banks for depositing and withdrawing Tomans for Aryacoin holders in Aryana Exchange.
• The number that you see on the monitor and in your account will be equal to the number that is transferred to your bank account without a difference of one Rial.
• The last but not least, noting the fact that there is a trading in Tomans possibility in Aryana exchange.
Aryana Exchange is using the most powerful, fastest, and most expensive server in the world, Google Cloud Platform (GCP), which is currently the highest quality server for an Iranian site, so that professional traders do not lag behind the market even for a second.
The feature of Smart Trading Robots is one of the most powerful features for digital currency traders. Digital cryptocurrency traders are well aware of how much they will benefit from smart trading robots. In the Aryana exchange, it is possible to connect exchange user accounts to intelligent trading bots and trade even when they are offline.
The injection of $1 million a day in liquidity by the WhiteBite exchange to maintain and support the price of Tether and eliminate the Tether fluctuations with Bitcoin instabilities used by profiteers to become a matter of course. ## 1.1.8 HOW DOES ARYACOIN WORK? Aryacoin (AYA) tries to ensure a high level of security and privacy. The team has made sure to eliminate any trading restrictions for the network users: no verification is required to carry out transactions on AYA, making the project truly anonymous, decentralized, and giving it a real use in day-to-day life. The Delayed-Proof-of-Work (dPoW) algorithm makes the Aryacoin blockchain immune to any attempts of a 51% attack. AYA defines a coin as a chain of digital signatures — each owner transfers the coin to the next owner by digitally signing the hash of the previous transaction and the public key of the next owner, and the receiver verifies the signatures and the chain of ownership. # 2. ARYACOIN TECHNOLOGY ## 2.1 PROOF-OF-WORK They use a proof-of-work system similar to Adam Back’s Hashcash to implement a distributed timestamp server on a peer-to-peer basis, rather than newspaper or Usenet publications. The proof-of-work involves scanning for a value that when hashed, such as with SHA-256, the hash begins with a number of zero bits. The average work required is exponential in the number of zero bits required and can be verified by executing a single hash. For their timestamp network, they implement the proof-of-work by incrementing a nonce in the block until a value is found that gives the block’s hash the required zero bits. Once the CPU effort has been expended to make it satisfy the proof-of-work, the block cannot be changed without redoing the work. As later blocks are chained after it, the work to change the block would include redoing all the blocks after it. The proof-of-work also solves the problem of determining representation in majority decision making. If the majority were based on one-IP-address-one-vote, it could be subverted by anyone able to allocate many IPs. Proof-of-work is essentially one-CPU-one-vote. The majority decision is represented by the longest chain, which has the greatest proof-of-work effort invested in it. If honest nodes control a majority of CPU power, the honest chain will grow the fastest and outpace any competing chains. To modify a past block, an attacker would have to redo the proof-of-work of the block and all blocks after it, then catch up with, and surpass the work of the honest nodes. ## 2.2 NETWORK The steps to run the network are as follows: • New transactions are broadcast to all nodes. • Each node collects new transactions into a block. • Each node works on finding a difficult proof-of-work for its block. • When a node finds a proof-of-work, it broadcasts the block to all nodes. • Nodes accept the block only if all transactions in it are valid and not already spent. This is a very simple system that makes the network fast and scalable, while also providing a decent level of anonymity for all users. Users can send their transactions to any of the public nodes to be broadcast, and the private key of the sender’s address should sign any transaction sent to the nodes. This way, all transaction info remains strictly confidential. It also allows users to send transactions directly to the node from any place at any time and allows the transferring of huge amounts with very low fees. ## 2.3 AYAPAY PAYMENT SERVICES GATEWAY: According to creators Aryacoin, the development team has succeeded in inventing a new blockchain technology for the first time in the world, which is undoubtedly a big step and great news for all digital currency enthusiasts around the world. This new technology has been implemented on the Aryacoin AYAPAY platform and was unveiled on October 2. AYAPAY payment platform is the only payment gateway in the world that does not save money in users’ accounts and transfers incoming coins directly to any wallet address requested by the gateway owner without any additional transaction or fee. In other similar systems or even systems such as PayPal, money is stored in the user account. ## 2.4 CONSENSUS ALGORITHM IN ARYACOIN The devs introduced the Delayed-Proof-of-Work (dPoW) algorithm, which represents a hybrid consensus method that allows one blockchain to take advantage of the security provided by the hashing power of another blockchain. The AYA blockchain works on dPoW and can use such consensus methods as Proof-of-Work (PoW) or Proof-of-Stake (PoS) and join to any desired PoW blockchain. The main purpose of this is to allow the blockchain to continue operating without notary nodes on the basis of its original consensus method. In this situation, additional security will no longer be provided through the attached blockchain, but this is not a particularly significant problem. dPoW can improve the security level and reduce energy consumption for any blockchain. ## 2.5 DOUBLE-SPEND PROBLEM AND SOLUTION One of the main problems in the blockchain world is that a receiver is unable to verify whether or not one of the senders did not double-spend. Aryacoin provides the solution, and has established a trusted central authority, or mint, that checks every transaction for double-spending. Only the mint can issue a new coin and all the coins issued directly from the mint are trusted and cannot be double-spent. However, such a system cannot therefore be fully decentralized because it depends on the company running the mint, similar to a bank. Aryacoin implements a scheme where the receiver knows that the previous owners did not sign any earlier transactions. The mint is aware of all transactions including which of them arrived first. The developers used an interesting solution called the Timestamp Server, which works by taking a hash of a block of items to be ‘timestamped’ and publishing the hash. Each timestamp includes the previous timestamp in its hash, forming a chain. To modify a block, an attacker would have to redo the proof-of-work of all previous blocks, then catch up with, and surpass the work of the honest nodes. This is almost impossible, and makes the network processes more secure. The proof-of-work difficulty varies according to circumstances. Such an approach ensures reliability and high throughput. # 3. ARYACOIN ROADMAP April 2019: The launch of Aryacoin; AYA ICO, resulting in over 30BTC collected December 2019: The launch of AYA Pay April 2020: The successful Hamedan Hardfork, supported by all AYA exchanges, aimed at integrating the dPoW algorithm, improving the security of the AYA blockchain. June 2020: Aryana Exchange goes live, opening more trading opportunities globally July 2020: The enabling of our Coin Exchanger November 2020: The implementation of Smart Contracts into the Aryacoin Ecosystem Q1 2021: Alef B goes live (more details coming soon) # 4. THE NUCYBER NETWORK COMMUNITY & SOCIAL Website: https://aryacoin.io/ Explorer: https://explorer.aryacoin.io/ Github: https://github.com/Aryacoin/Aryacoin Twitter: 1.1k followers https://twitter.com/AryacoinAYA Reddit: 442 members https://github.com/nucypher Instagram: 3.8k followers https://www.instagram.com/mrdigicoin/ Telegram: 5.9k subscribers https://t.me/AYA_Global # 5. SUMMARY Aryacoin (AYA) is a new age cryptocurrency that combines the best of the blockchain technology and strives to deliver high trading and mining standards, enabling users to make peer-to-peer decentralized transactions of electronic cash. Aryacoin is part of an ecosystem that includes payment gateway Ayapay and the Ayabank. AYA has a partnership with the Microsoft Azure cloud platform, which provides the ability to develop applications and store data on servers located in distributed data centers. The network fee for the AYA Blockchain is 0%. In Ayapay service, which has been developed by the Aryacoin team, all funds without extra fees or costs are directly forwarded to users’ wallets with technology called CloudWithdrawal. The devs team is introducing new use cases including exchanges where users will exchange AYA without any restrictions. You can buy AYA on an exchange of your choice, create an Aryacoin wallet, and store it in Guarda. # 6. REFERENCES 1) https://coincodex.com/crypto/aryacoin/ 2) https://www.icosandstos.com/coin/Aryacoin%20AYA/YuXO60UPF3 3) https://www.publish0x.com/iran-and-cryptocurrency/a-brief-introduction-of-aryacoin-first-ever-iranian-cryptocu-xoldlom 4) https://techround.co.uk/cryptocurrency/aryacoin-the-digital-currency-created-by-iranians/ 5) https://bitcoinexchangeguide.com/aryacoin/ 6) https://blog.coinpayments.net/coin-spotlight/aryacoin 7) https://guarda.com/aryacoin-wallet submitted by CoinEx_Institution to Coinex [link] [comments] ##### Water Currency Hello! I am the creator of WaterCurrency and I've been inspired to create something new in the Cryptocurrency world :D I am developing a Cryptocurrency backed by Water! This post is a small poll to actually know what you guys think, since you'd be the major users of this project :) (To be honest it's entirely dedicated to you guys!) WaterCurrency is a coin pegged to the price of 1 Liter of Water and will be adjusted with Ask-Bid spread once it takes off :) # The reason: I wanted to create a Currency which can be considered stable enough to withstand many events: Gold is the commodity #1 in our world, followed by Silver. When bad things happen both of these metals gain value because people don't trust standard FIAT money anymore. Nowadays a new opponent has arisen: Bitcoin. What is Bitcoin? Bitcoin is a cryptocurrency not owned by anyone: a Peer-to-Peer money exchange network without a middleman. Bitcoin is a service commodity whose intrinsic value depends on its ability to create value by performing some complex hashing procedures; many people however believe that Bitcoin doesn't really have any intrinsic value since it's not backed by Gold or Silver and it's made out of "Thin Air". Certainly during a crisis period Bitcoin will have a rough time to compete against an actual asset like Gold since no one would actually mine Bitcoin's anymore and accept them as payment. The scenario I imagine is pretty much apocalyptic: famine, diseases and Gov instability. # The proposed solution: Water is the basis of all life, its intrinsic value persists even during the previously mentioned apocalyptic scenario because any living being on this planet will need water to survive. Water has a stable price in developed countries and can actually be stored for a very long time since Water doesn't go bad (Source: https://www.healthline.com/nutrition/does-water-expire) Water can be stored in Glass containers and last a lot, according to Truls Krogh, director of the Department of Water Hygiene at the Norwegian Institute of Public Health even more than your entire lifetime (Source: https://sciencenorway.no/forskningno-norway-watecan-water-spoil/1442835) A Currency backed by Water means that you can "virtualise" many liters of Water and exchange them for Goods or services or even other Cryptocurrencies if you wish but knowing that the price of water is stable and you can redeem water during Crisis. # Details of the Project: WaterCurrency starts with 100 000 Coins availability, each one of them is the equivalent of 1 Liter of Water WaterCurrency has a 3 Decimal precision so you can buy 1. Liter 2. Deciliter 3. Centiliter 4. Milliliter The initial supply of 100 000 Coins is calculated with the average household water consumption of 273 Liters per day for a single person. # Fees: WaterCurrency has very little fees: 0.01 per transaction (proposed, need to evaluate better). # What can I do with it: You can buy anything you want! WaterCurrency should soon be able to purchase physical and digitals goods by one of our partners. You can even exchange it for other Currencies such as Bitcoin, Eth, Monero or others! # Conclusion: Having a currency backed by Water is a guarantee. Water won't go away or go bad if stored properly and can last many years to come, can help you and your family during a financial crisis and can actually help the planet. The more Water you earn the more you can help one of our partner to plant Trees and actually make this World a bit better :) And also... It's a Water Currency! How cool is that?! :) # WHAT I NEED: I'd like to ask you guys to tell me if you are actually interested in this project and if I should carry on and actually make it public. The Currency is already there and should work correctly once released in production but I need your thoughts, ideas, doubts and whatever you want to tell me! I'd like to leave you my landing page website and ask you to SIGNUP if you are interested with your email or complete the following Poll if you don't wish to disclose your email. Thank you in advance to everyone. ___________________________________________________ # The site: https://watercurrency.org/ ___________________________________________________ # POLL: # Would you use it? Do you like the idea? View Poll submitted by albwalb to HydroHomies [link] [comments] ##### Critical risk nobody is considering when staking Ampleforth.. Read the TLDR if you dont want to read all this. With bitcoin their is an incentive to stay in the network ("staking" your fiat in bitcoin) because the farther the price of bitcoin goes down, the greater an incentive it would be to buy the coin because the price is lower. Because of the increasingly greater incentives to buy bitcoin at an increasingly lower price, there would be no drying up of incentives for buying bitcoin, so bitcoin will never go too extremely far down. However, with this coin things are different. When things start to dry up or the price goes down, when people decide to pull out, not only will the market cap go down but there is an opposite incentive compared to a decrease in price for bitcoin. If you are still staking while people stop staking and start selling because the price is going down, you will be disproportionately and exponentially effected. For example lets say that the rewards are 20% ampleforth and then the next day rewards are -20% ampleforth. If 20% of users stop staking because -20% is too much of a loss then rewards become -25% ampleforth instead for the remaining users. Maybe -25% ampleforth is too much for some users so another 20% stop staking and the rewards are now -31.5% ampleforth. Notice that the negative rewards become exponentially severe as people leave. This effect will start to become severe and people will be forced to leave staking (and perhaps also have an incentive to sell if they think the price is high at like$3 going to $1 or 1$ going to 50 cents) unless they want to lose everything. At some point, the daily % loss is so much that you will need to leave the network or else become completely liquidated and lose everything. Either that or people will realize network participation is so volatile that they simply will not want to stake, and staking is the difference between stable coins and this coin. If people dont want to stake because of exponential volatility, then the market cap goes darastically down. I personally dont know what happens if the market cap goes exponentially down, but I personally dont think people will want to stake in a network that feels like gambling where one day you could earn exponential amount, and other days you can lose an exponential amount. And if people dont stake, then things become even more volatile, and the more volatile things become there would be an even greater incentive to not participate in the network. Its a feedback loop. Right now, everyone is participating in the network, so its hard to imagine people needing to decide whether or not to stake ampleforth, but at some point people will begin to make this decision. I know there is incentives to particpating for longer periods in the network, but I also dont think those incentives are enough given the overwhelming exponential gains and losses that could be incurred from people joining and leaving the network.
If the price goes lower than the rebase, and less people are staked because of decrease in price, you will be catching a falling knife because of the low liquidity, which cause you to take extreme losses which are disproportional to the decrease in market cap. This wouldnt be an issue if the liquidity was the same as demand started to rise, because when market cap goes back to its original level and liquidity is the same, you would make up for the temporary losses. However, when the price goes up, I am going to guess many more people will be staked so you will be more likely to make much less than the amount that you lost. This is different than bitcoin where you will always make as much as you lost if the price goes back to its original level.
There are positive incentives to stay ("stake") in a network for coins with fluctuating prices, but those incentives dont exist for this coin and are actually the opposite in this case.
TLDR: The fact that market liquidity can change means lower liquidity when prices go down and higher liquidity when prices go up. Because of lower liquidity when prices go down and higher liquidity when prices go up, if you have 100 Ampleforth when the market cap is 2 trillion, and prices go to 500 billion, you might have actually less ampleforth than you originally had when market cap goes to 2 trillion again because of the low liquidity when prices go down and high liquidity when prices go up, as long as you stay staked when it goes to 500 billion and back. I think this is likely to happen because I think liquidity will always be lower when prices go down than when they go up. The fact that you can lose ampleforth just because prices go down and back means that people will not want to hold when prices go down / go under $1. And this will cause massive reinforcing instability. submitted by -4US to AmpleforthCrypto [link] [comments] ##### Cryptocurrencies: the Past Reinvented  ​ https://preview.redd.it/io0mkfpayel51.jpg?width=2560&format=pjpg&auto=webp&s=839666f628a9ae85fa3ef4ffb020c1c2ba598683 As the first country to industrialise in the 1760s, Britain’s manufacturing revolution set the world on one of the greatest practical and ubiquitous changes in human history. Even more extraordinary is the fact that Britain’s industrialisation remained way ahead of potential competition for decades. Only in the early 1900s did historians get to grips with the issues of causation. Max Weber’s pithy answer “the Protestant work ethic” pointed to Puritan seriousness, diligence, fiscal prudence and hard work. Others include the establishment of the Bank of England in 1694 as an essentially corollary by creating the necessary conditions for financial stability. In contrast, Continental Europe lurched from one national debt crisis to another, then through itself headlong into the Napoleonic wars. Unsurprisingly, it was not until after 1815 industrialisation took place on the European mainland where it was spearheaded by the new country of Belgium. 250 years latter with the launch of Bitcoin another revolution had begun; though this one more commercial in nature than industrial. Though the full impact has yet to be played out, the parallels between these two historical events are already striking. Bitcoin may not match the obviousness of industrialisation, but the underlying pragmatics touch on the very foundations of the non-barter economy. Like the establishment of the Bank of England, the creation of the cryptocurrency infrastructure has been prompted by ongoing and worsening threats to financial instability; systemic fault-lines created by macroeconomic challenges flowing from the 2008 crash. For those who could “join the dots” in 2008, there was the realisation that central banks no longer existed as guardians and protectors of national currencies but the tools of creating politicised market distortions; abandoning their duty to preserve wealth in favour of creating the conditions for limitless, cheap government debt. While many of the underlying intentions were benign, inherently the process worked to punish savers and reward reckless debt. This anticipation of on-going instability surrounding fiat currencies and the viability of crypto alternatives has proved more prescient than could have ever been previously imagined. Within a short space of time a wave of undercurrents gave rise to new vocabularies, outlooks and expectations which have impacted commercial and investment transactions, a change never more acutely observed than today, when even against the backdrop of the COVID crisis Central Banks are rushing to create their own “digital” krona, pound, dollar etc. “Digital” may represent a confusing nomenclature, however, as these are not cryptocurrencies in the true sense, and certainly not part of decentralised finance (DeFi). The digital krona does, however, manifest the increasingly powerful impact that the cryptocurrency ecosystem is having on mainstream banking and government behaviour. As with Britain’s industrial revolution, it has taken time for the potential of cryptocoins to find more energetic traction. Over the past 12 years cryptocurrencies have moved from unknown, to novel, to significant and growing interest. As a result, profound changes are underway affecting the mechanics by which investors, the investment industry, wealth mangers and even the commercial banking sector is engaging with cryptocurrencies. This interest has quickened as we enter into a period of deep economic unknown and growing awareness that structural soundness is shifting away from traditional investment options. Intelligent engagement requires cryptocurrency investors/wealth managers to accurately understand and correctly explicate the nature of these influences and assess their potential impact. This article suggests seven distinct elements (a non- exhaustive list) as currently ranking definitive importance: Cryptocurrencies comprise account for only a tiny fraction of the global economy. At an estimated value of$375 billion, this is several orders of magnitude smaller than a world GDP of $35 trillion (2019). Assuming other factors are favourable, there is clearly room for growth. Cryptocurrency success will mark the end of critical aspects of Central Banking monopoly; by revealing the fictitious nature of fiat currencies as a principle; by offering a more competitive vehicle for facilitating commercial transactions; and providing a more stable medium to store monetised assets. Apart from stability, cryptocurrencies offer real returns on “cash” deposits, something which the fiat banking system has long since abandoned. (The reasons for the latter are deeply significant and will be followed up in a subsequent article). Cryptocurrency success will hasten the end of the dollar monopoly in global commerce. Indeed, at current trending, changes in trading mechanics may speedily evolve to the point that such “reserve currencies” no longer have a function at all. Analysts once speculated that it was only a matter of time before the Chinese yuan displaced the dollar, in the same way that the dollar displaced the pound. The edifice which supports the concept of a “global reserve currency” is weakening. The latter’s demise will have significant implications regarding reducing political influence over global finance, as well as nations’ abilities to run longterm balance of payments deficits, current account deficits and borrow at little or no interest. Cryptocurrencies as an ecosystem—assuming the current direction of evolution continues—will increasingly constrain, redirect and set the parameters to government macroeconomic policies. Certainly sound alternatives to fiat currencies will drive the latter to the periphery of commercial life, concomitantly reducing the number of tools the nation state has at its disposal to regulate or respond to changing economic conditions. This especially means setting meaningful interest rates. Above all, it means that government financial engagement can no longer be a rule unto itself, it will have to engage by the same principles as everyone else. A level playing field here has dramatic implications—and will again be picked up in a subsequent article. Cryptocurrencies represent a wider range of disruptive elements affecting the commercial ecosystem. Among the most direct is the ability to raise finance or enter into other commercial transactions with little to no red tape, intrusive regulation or political interference. In short it de-politicises, de-institutionalises and de-centralises investment and payment options, while retaining many of the protective and other beneficial aspects present in traditional finance. Cryptocurrencies offer rapid commercial advances enfranchising the one- third of the global population who do not have a bank account—but do have a mobile phone—and concomitantly enable business that currently cannot accept electronic forms of payment to move into digital commerce. In the way that cellular communication revolutionised sub-saharan Africa in the early 2000s, so we may anticipate some parallel here as regards ease and ubiquity of payment “wallets” and their positive impact on developing economy dynamics. Cryptocurrency potential increasingly offers a route to security and liquid asset preservation/growth in a world where fundamentals are being shifted out of all recognition; driven by economic policies predicated firstly on the priority of COVID management and secondly on the move away from rules-based multilateralism towards bilateralism. Global cooperation is yielding to the demands of national integrity, security of supply and highly aggressive competition in key enabling technologies such as 5G, AI, quantum computing and encryption, which themselves will have as profound impact on cryptocurrency evolution as the creation of the bitcoin itself. Against the backdrop of the essential limits of fiat currencies, current geo- macroeconomic policies and a new emerging world order, cryptocurrencies offer vast potential: An efficiency facilitating frictionless commerce/investment. A medium of stability against the backdrop of uncertainty and inflation. Increased security in value transfer and wealth management. Optimum autonomy in an increasing intrusive climate. “Cash” asset preservation/growth in a world of negative interest rates. In all this we may well have come full circle to 1694 and the stability and security that the establishment of the Bank of England was intended to entrench—but now it is now de-centralised finance that will get us there. Article source: https://www.finxflo.com/news/detail/5127 submitted by JamesFXF to FXF [link] [comments] ##### Gold and Silver: Where Do They Go From Here? https://federationofglobalmerchants.com/2020/08/14/gold-and-silver-where-do-they-go-from-here/ Investors know by now that one of the leading indicators of an unstable and unpredictable stock market is a surge in the price of precious metals like gold and silver. In February, amidst the COVID-19 pandemic, the markets officially entered a recession, even though just months later several of the major indices have reached all-time highs. It was a brief dip into recessionary territory, but this sort of volatility is what gives investors hesitation in putting their money into the stock market, rather than something that is perceived to be more stable. Gold future contracts are selling well above$2000 per ounce for the rest of 2020 and well into 2021 as well showing that investors are confident that gold will continue to rise in price. Silver is also surging reaching new all-time highs on a daily basis. So investors may be curious as to how to get into this red-hot market, especially as the markets continue to fluctuate.
Gold:
For centuries now gold has been literally the ‘gold-standard’ of currency and wealth. Dating back all the way to around 40,000 B.C. in Spanish caves, gold is a naturally occurring element that has both fascinated and lured people for as long as barter systems and wealth has been recorded. Currently, gold is enjoying its highest valuations in history as investors flock to the stability of the precious metal through various streams. So what is the allure of gold and why is it so stable?
Warren Buffett once said, “Gold is a way of going long on fear.” That is quite a statement from perhaps the greatest investment mind of our generation. But what does this mean for the novice investor? Even the most successful blue-chip stocks can crash. Obviously the more prominent and profitable companies with mega market caps will not crash as easily as smaller companies, but given the volatility of the pandemic, we can see anything happen. But as stock markets fluctuate on a daily basis, the price of gold remains mostly stoic. Not as manipulatable as stock prices, gold is as steady as it gets for investors.
What makes gold so stable? It is a combination of factors, first and foremost, it is a physical and tangible element which makes it possible for people to store and stockpile. It does not corrode or wear down over time, making it durable and ensuring that the value remains. There is also a finite supply of it in the world. This reinforces that it will always keep a certain level of valuation as the supply is kept in check.
Today, as the Federal Reserve tries desperately to pump money into the American economy to stave off a global recession and keep companies afloat. Printing more American dollars helps in the interim, but it is a temporary band-aid for the bigger problem. As more of the dollar gets created the more it gets devalued as a form of currency. This is another reason why gold is skyrocketing. The two valuations always work inversely to each other, so as the greenback continues to plummet, the price of gold will continue to surge which makes perfect sense if one thinks about it. The value of gold is priced in American dollars per ounce, so if the value of an American dollar retreats, the cost of gold will rise in response.
So how can investors take advantage of the current state of gold? In the age of internet investing, there are plenty of ways to invest in gold or anything in that matter. Most American platforms give inventors the ability to buy fractional shares of companies. While this comes in handy for expensive stocks like Amazon (NASDAQ:AMZN), Alphabet (NASDAQ:GOOGL), or Tesla (NASDAQ:TSLA), it also allows investors to diversify their funds across multiple companies to form a basket approach to an industry. There are also plenty of ETFs or Exchange Traded Funds, available for investors to consider. These funds have the diversification of a mutual fund or index fund, but trade like individual stocks. Here’s a few of the better gold ETFs to consider if you are looking to get into the industry:
1. IAU – iShares Gold Trust: One of the better known gold ETFs out there, iSHARES is a reputable brand with great overall market performance. The fund has returned over 17% to inventors already this year, and with the price of gold projected to continue to rise, this fund should keep delivering for investors into next year.
2. DGL – Invesco DB Gold Fund: Another well known and reputable ETF, the Invesco Gold Fund has slightly higher fees than iSHARES but has also had a slightly better return so far this year.
3. IAUF – iShares Gold Strategy ETF: Another iSHARES ETF, this one has parts of IAU, as well as gold futures contracts, to get a long term forecast of the price of gold so the investor gets exposure to a wider range of gold options.
There are dozens of other ETFs available for investors that cover everything from miners to the finished products. Mining company stocks are another great way to get exposure. As the demand for gold increases, these mining companies should see a rise in their revenues and eventually, their profits as well. These changes will be reflected in their stock prices and we have already seen some of this already this year.
1. ABX – Barrick Gold: One of the largest gold mining companies in the world, this Canadian company has seen healthy gains in their stock price so far in 2020. Over the last 52 weeks, Barrick investors have enjoyed a 131% increase in stock price. With mining projects ongoing in Canada, America, Australia, South America, and Africa, Barrick has already announced that it is on track to achieve guidance this year despite closures from COVID-19.
2. FNV – Franco-Nevada Gold: This stock price rose almost 15% in July alone. Franco-Nevada operates as a funding company to gold mining companies, rather than actually doing the mining themselves. Sustainalytics, a guidance and analysis company, rated Franco-Nevada number one amongst 104 precious metal companies.
3. NEM – Newmont Goldcorp: The largest gold stock by market-cap and the only stock to trade on the S&P 500, Newmont is probably the safest company for gold investors to invest in. On top of steady returns and low volatility in the stock price, the company pays a fairly healthy dividend as well.
With gold at all-time highs, we can begin to question how high the precious metal may go. With a second wave of the coronavirus making its way around some parts of the world, and America, still making its way through their initial wave, the uncertainty that exists in today’s markets may continue into 2021. Some Wall Street analysts have forecast gold to rise as high as $10,000 per ounce, but that seems like a little ambitious. Gold has just recently hit all-time highs at$2000 per ounce and to imagine that it can run up another 500% in the next few years seems far-fetched at this point in time. That would require the markets to enter an extended bear-market, which of course is possible after a decade of a bullish run, but it would also require the American dollar to continue to be further devalued.
Gold is pegged to continue to rise for the rest of this year though and well into 2021. That means investors and analysts are foreseeing a further devaluation of the American greenback as well as continued volatility in the markets and economy. Is gold a safe haven? Some people believe it is, but if you are an investor that enjoys high returns over long periods of time, investing in precious metals may not be for you. Investors love the stability of gold but the returns are never astronomical, with the last few months being an exception. It helps to have a portion of your portfolio dedicated to precious metals to diversify and protect you from any sudden market corrections, but investors should not be looking at gold as a short-term way to get wealthy.
Silver: The other precious metal that has been flying sky-high of recent months is silver, the eternal younger brother to gold. Mined from silver-ore, it is a highly malleable metal that was once valued higher than gold by the Ancient Egyptians. Today, it is relatively low in price per ounce compared to gold, reaching all-time highs recently of just under $30 per ounce. Silver is another stable alternative to gold, and at lower prices, it may be a little more affordable for the novice investor to jump into. Like with gold, silver has an inverse relationship to the American dollar, and to all currencies in general. Again, this is another reason why silver is hitting all-time highs right now, with silver future contracts predicting a steady rise to mirror gold, well into 2021. There is also something that Wall Street calls the gold silver ratio, which is exactly what it sounds like: the ratio of the price of gold per ounce to the price of silver per ounce. This ratio has historically moved together, which makes logical sense if both precious metals are independently moving inverse to paper currencies. Historically, the gold and silver prices do move together though as the general ratio has been in the range of 17:1 to 20:1. Silver also has numerous ways for investors to get involved in, including silver mining and production companies, as well as the ever popular silver ETFs. These Exchange Traded Funds have gained popularity amongst retail investors in recent years as a way of purchasing a diversified product as a single equity with low costs, and no trading fees if your platform allows it. Here are a few of the better performing silver ETFs that investors can look into adding to their portfolios if they are interested in the precious metal: 1. SLV – iShares Silver Trust: Probably one of the better known silver ETFs, this is fully backed by silver bullion and coins held in a vault. While usually fairly steady, this ETF has enjoyed a 52-week increase of 152% with much of that coming in the last few months. 2. SIVR – Aberdeen Standard Physical Silver Shares ETF: Very similar to SLV but with lower fees, this is an ideal fund for novice and experienced investors to get into as they start to diversify their portfolios. 3. DBS – Invesco DB Silver Fund: Again another stable ETF for investors to get into, and another good performing one as well. Just as with their gold ETF, Invsco focuses on silver futures contracts for this fund, so it is a nice long-term play if investors are bullish on silver. Just as with gold, investors can get a slice of the silver pie by buying shares of silver mining companies as well. Here are a few of the top silver mining company stocks that investors can look into adding to their portfolios. 1. PAAS – Pan American Silver Corp.: This Canada based miner is focussed on the exploration, development, extraction, refining, processing, and reclamation of silver. They operate mines in Peru, Mexico, Bolivia, and are developing more as well for the future. 2. WPM – Wheaton Precious Metals: Another Canadian based company that deals with miners of gold, silver, palladium, and cobalt. Wheaton is not a direct miner, rather they purchase these precious metals from other mining companies. 3. AG – First Majestic Silver Corp.: Canadian companies seem to be dominating the silver industry, and First Majestic is another of those. This company focuses mainly in Mexico for gold and silver. Silver may never be as popular as gold for investors to keep track of but the two precious metals move in a synchronized fashion, and both are looked upon by investors as safe havens for their money when the market is in flux. The rest of 2020 seems like a wildcard right now, with many analysts expecting a further correction to the markets at any point. There seems to be an inevitability to a market crash of some sort, whether it is as big as the one that happened back in February and March, remains to be seen. Investors are looking at the precious metal industry to hold their funds to wait out any sort of correction or crash. If this does happen, we may expect a pullback in precious metals too as investors selloff to get back into some stocks at their low levels. Such is the ebb and flow of the economy during turbulent times like the current one we are in. At the same time, what if a market correction does not happen? Will the uncertainty continue or will investors feel relatively secure in the way the markets are progressing? This could cause a reduction in the demand for silver and gold, culminating in lower prices in the future. Of course this also depends on the Federal Reserve diminishing their rate of printing paper currency to bailout the economy, which does not seem like a reality in the short-term at least. Another point of contention for investors is the ongoing economical and political tensions between China and America. The two world powers have been feuding for the past couple of months over various things, but it escalated as China social media app Tik Tok gained popularity in North America. It was alleged that TikTok was sending data and information from mobile phones back to China, though nobody is sure of their intended use of this data. Regardless, the markets have stumbled several times lately because of this. Both sides have threatened economic sanctions and the banning of certain product use in each country. The prices of silver and gold have shot up as the tensions have escalated between the two governments, as investors flock to the precious metals. Many of the biggest companies on the major stock indices rely on China for materials or production, so any sort of breakdown in supply chains could cause an enormous change to their stock prices. An example of this is a sudden 5% correction in the price of Apple (NASDAQ:AAPL), as it was thought that iPhone sales would decline if China’s chat platform WeChat was banned in America. There are other factors that may have an effect on gold and silver prices as well. In this modern economy, many of the retail investors have trended towards younger adults with a sudden influx of income. Popular platforms such as Robinhood combined with increased time at home during the quarantine, have caused retail investor usage to skyrocket during the pandemic. Many of these investors are more lured in by the shiny new objects of cryptocurrencies like Bitcoin. Perhaps we will start thinking of these cryptocurrencies as a modern day version of precious metals one day, as many investors and some analysts, believe that Bitcoin may be a safe haven in the future. Already, the price of Bitcoin has risen above$12,000 in August, mirroring the highs of gold and silver. If the demand for Bitcoin rises higher than the demand for precious metals, we may see an investor migration to cryptocurrencies rather than tangible metals.
Conclusion: Gold and silver are staples of our global economy, and will continue to be so as long as the demand for precious metals exists. In times of uncertainty, gold and silver are viewed as safe relative to the volatility of the stock market. Sure, their prices can vary as well, but because they are tied to a less dynamic valuation that is based on an inverse relation to paper currency, their prices will not and can not fluctuate as much as the liquidity of individual stocks.
As long as the world remains in flux, there will be a general feeling of instability, especially for global markets. A second wave of COVID-19 in the third or fourth quarter of 2020 could prove to be enough to push the markets over the edge and into another recession. The bull market has been rallying for over a decade now, with astronomical gains over the last few years, especially for sectors like the big tech FAANG stocks. Another factor to consider is what a Biden government could bring to the world if he is elected over President Donald Trump in October. A new government could ease some of the tensions with China, as well as within America itself. These are all big what ifs, and could all have potential impacts on the economy and the world. As long as all of these factors are up in the air, investors will be looking to gold and silver as ways of stabilizing their portfolios and protecting their finances from a potential market crash in the future.

##### The speech of Jerome Powell might influence the future of financial markets – will it help Bitcoin?

 ​ https://preview.redd.it/vatujns7wqj51.jpg?width=1200&format=pjpg&auto=webp&s=4bed25d799f61b785f8fcde08a4b8f8130c0415b Yesterday, the whole financial world was waiting for the speech of Jerome Powell, the Chairman of the Federal Reserve. Only the waiting for his speech and the following session did already see higher volatility all across the financial markets. Bitcoin for instance increased in a matter of seconds from 11 300 to more than 11 600 dollars in the afternoon trading sessions. Shortly, it fell back down to the levels of 11 300 dollars and is currently trading at around 11 450 dollars. However, that is not the only outcome of the speech of one of the most influential central bankers of the current time. What did Jerome Powell tell us? The speech of Jerome Powell introduced few new concepts that are connected to the tough economical situation, which happened due to the COVID-19 and the lockdowns connected with quarantine. These restrictions negatively influenced almost all the industries, but Fed tried to deal with the economic slowdown by printing more money. However, this could not go on forever, which is why Jerome Powell introduced new ideas and plans of Fed. Obviously, Fed is very aware of the worsening situation and that is one of the reasons why it changed its taken on inflation. First time in the modern history the Fed informed that the inflation rate will be held on the average level of 2%. Until now, the inflation policies have always tried to keep inflation below or at 2% level, depending on the country and central bank. What the target of having 2% average inflation rate means is that during some period of time, the inflation can be around 3% even 4%. In the medium to long term however, the Fed wants to keep the inflation level on the average of 2%. The reasoning that Jerome Powell presented is that the higher inflation will help with keeping the interest rates lower and therefore help the economy to restart. This is due to the fact that the lower interest rates will encourage the households, businesses and individuals to spend the money and not to save them. This should help decrease the unemployment and recover from potential crises faster and stabilize the job markets and the economy overall. What this means for Bitcoin and cryptocurrencies? Simply put, encouraging the people to spend also means that people will try to invest more so that the inflation does not cost them money. That is one of the reasons why yesterdays news are very bullish for the cryptocurrency sector, as individuals might be inclined to invest into more risky investments. What is also intriguing is the fact that people might be interested in investing in Bitcoin not only as a speculative asset, but also safe-haven asset such as gold. That is what evidence suggests, since the correlation of Bitcoin and gold has been increasing recently, reaching ATH on monthly correlation. What does this mean for the future? In this case, the reason for investing is not as important as the fact that individuals and households might be inclined to invest more money into Bitcoin due to the instability of inflation leading to unnecessary financial risk. That means, more people will be inclined to enter the cryptocurrency sector. And that is what Fun Gram is here to do. Fun Gram is here to help those that do not have the necessary experience or skills needed to invest in any cryptocurrency out there. Having created the platform for social interaction between crypto enthusiasts, the project aims to connect people with different experience and levels of understanding of blockchain, FinTech, DeFi, trading or investing. Using encryption economy, blockchain and artificial intelligence, Fun Gram combines the most recent FinTech trends together to help everyone feel welcomed and informed in the sector of cryptocurrencies. Moreover, Fun Gram connects the sectors of decentralization, payments and finance, meaning that it creates a complete ecosystem for everyone. submitted by fungram-global to u/fungram-global [link] [comments]

##### White Swan came, Black Swan's a comin'

Like many here, I'm trying to come up with an investment thesis and a strategy for these uncertain times. I'm currently Bearish - have gone largely to cash, but want to invest in defensive plays because I see much more uncertainty ahead. So this long and rambling post is going to try to play with some ideas I've been having about the future. For the record, I've been investing for 8 years, was primarily an ETF buy and hold investor, and am Canadian, with a background in Political Science. ( I mean, I've got an undergraduate degree and a long-time interest, I'm no expert or nothing.)
I've read Nassim Taleb's Incerto series and have been mainly convinced, I think, and am surprised at the number of people who are calling this a Black Swan (BS) event; there's a post from today where a guy points out that it's not, and that Taleb himself says it's not and he got downvoted to hell. So first off: the Covid-19 pandemic was not a Black Swan. The Covid-19 pandemic, or one like it, has been predicted by damn near everybody for decades. The Obama administration even used a similar pandemic as a war game to get the Trump administration up to speed during the transition, Bill Gates called this years ago, we had a similar outbreak in SARS and H1N1, etc. Even if that wasn't the case, C19 would only be a BS for China - as a bunch of media sources have pointed out, there were US intelligence reports as far back as December saying this would be a huge deal, which were ignored by the administration. So all the suggestions that this is a BS event are really just pointing out how bad many governments, markets, and corporations are at predicting the future - they're unable to predict or prepare, or respond appropriately for a predictable event and only capable of reacting (with the exception of some countries like South Korea, Taiwan, Singapore, Germany...)
Now with the market rallying the bulls are all saying "it's priced in, you can't fight the Fed, etc," and I'm thinking:
1) The emperor has no clothes; the US government is clearly incompetent. It couldn't even listen to it's own experts about the likely extent of the pandemic, had no plan or even seemingly the ability to be at all proactive. For example, an aircraft carrier had a port call in Vietnam, during the middle of a pandemic that started in Asia. Then, completely predictably, it had an outbreak of C19 and it's capabilities were badly damaged and the administration couldn't even properly help it's own ship, nor manage the public relations fallout that resulted. I mean, do you have any idea how insane it is that that ship was allowed to dock during a pandemic? One of the most powerful military devices that ever existed got taken off line cause the administration couldn't understand it's own intelligence.
This incompetence isn't limited to the US of course - the UK handled their initial response badly and had to switch horses mid-race, Canada lagged badly responding as well, Italy and Spain mismanaged their response - but I'd argue that the US, given their advantages in intelligence collection, should have been best positioned to deal with this crisis so I focus on them.
2) Because of this, I think the odds of a real Black Swan event have gone up considerably, and if one does occur, it will occur when the US is historically divided and weakened and where it's economic system is out of ammunition to deal with a second crisis. I'll explain:
We have been living at at time when major geopolitical disruptions have been absent - while proxy wars and minor terrorist attacks still occur, there's been no wars between great powers for some time, and I think many have come to see this as natural; that the unipolar world will continue. But Russia is resurgent, China has a 50 year plan to grow its economy and eventually take a place as a hegemon, which may be entering end-game, and much of the Western international community has grown uncomfortable with US leadership, given the American tendency to elect incompetent Republicans. So we're likely entering an era of uncertainty and increased instability as the contenders vie for status in the new international order.
This doesn't mean war or open combat - it's become a cliche that the new wars of the 21st century are economic ones, and, given nuclear proliferation that's likely to continue. And I think we're more likely to see significant economic combat in the next 6 months than at almost any time during the last decade, because: 1) Trump is incompetent (and here I should stop just shitting on Republicans... the Dems have picked a 77 year old half senile fool to go up against him. I mean, looking at the two guys contending for the leadership of the most powerful country that has ever existed, it's hard to come away thinking that this is the sign of a healthy political system.)
2)America is weak (relatively speaking obviously, they're still the undisputed big swinging dick) and divided.
3)Because of C19 hits to economy, Trump may not be re-elected. I suspect that if it looked likely that he's re-elected, China at least would be content to sit quiet and wait for 4 more years of dumbasserry to take its toll on US hegemony - similarly with Russia. But if it looks like he'll lose come November, they'll take advantage.
What would that economic war look like? Lots of options that I see, and I'm curious if you guys see other ones. I mean, what would it look like if China dumped treasuries over the next 7 months? Or what would happen if China and Russia, or even OPEC+ decided to trade oil in non-US dollars? Or what if China leverages foreign aid to African and Asian countries hard-hit by C19 for long term trade deals designed to damage US interests? Iran and North Korea are additionally wild cards, and if either one is hard hit by C19 could go down flailing with unpredictable results. Any others I'm missing? Curious to hear other's ideas.
Now, note I'm not saying that odds of economic war with China or any other US adversary are likely; I'm saying if the odds of a geopolitical Black Swan were usually 5% in any given year of the last twenty, I suspect the odds of a major BS have gone up 4 or 5 fold - so like 20-30%. And I'm wondering, given unlimited QE, zero interest rates almost everywhere, central banks everywhere supporting stock and currency markets, etc -- what a defensive portfolio, preferably one that's still exposed to positive black swans like a sudden cure, would look like. Is it gold or silver? Cash? Bitcoin? I've already got enough guns and bullets and a bunker... just kidding about the bunker.
But seriously, I'm thinking something like 10-20% PMs and miners, 20% cash, 20% bonds and the rest equity ETFs of some countries likely to benefit from a stronger and more dominant China, like South Korea and Australia. Given Chinese dishonesty and the opacity of the financial system, investing directly in Chinese companies makes me nervous, though I've been considering a stake in BABA. Canada, it seems to me, is too joined at the hip with the USA to do anything other than follow where it goes.
Anyways, if you stuck with me through all that, thanks and I'd love to hear other's thoughts. I'm absolutely not a prepper nor prone to panic -- I just think we're living in real interesting times and the times are likely to get interestinger in the near future.

DM me if you have any requests for anything not on the list.
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##### This will also go for Bitcoin, probably even to a bigger extent..

This is a quote from Egon von Greyerz:
"Forget about what price the metals will reach. Even in today’s money, whatever figure you think of will not be enough. And in hyperinflationary money, the price move will be exponential measured in worthless paper money. So don’t think about the value of gold and silver in dollars or euros. Just remember that gold is the only money that has survived in history. It is therefore the best form of wealth preservation and insurance against a bankrupt financial system…"
You can find a lot of interesting articles he wrote. He is telling about the value of gold and the instable financial situation for more than a decade.
Unfortunately he never talks about Bitcoin and I have never been able to talk about it with him. It's hard to imagine he wouldn't be listening to the Bitcoin proposition if told about it..
I think he's one of the few who is openly talking about the risks of the current financial sysyem without going to the usual conspiracy theories. His company manages the wealth of a lot high wealth individuals.
I think he's definitely correct about the future, but for some reason hasn't got Bitcoin on his radar. Probably because he plays the most safe cards.
But what he tells about gold will also go for Bitcoin, with the big difference that gold is the absolute safe way to play and Bitcoin being the leveraged way. More leverage means more risks compensated by higher possible gains.
HODL... strong..

##### Dive Into Tendermint Consensus Protocol (I)

This article is written by the CoinEx Chain lab. CoinEx Chain is the world’s first public chain exclusively designed for DEX, and will also include a Smart Chain supporting smart contracts and a Privacy Chain protecting users’ privacy.
longcpp @ 20200618
This is Part 1 of the serialized articles aimed to explain the Tendermint consensus protocol in detail.
Part 1. Preliminary of the consensus protocol: security model and PBFT protocol
Part 2. Tendermint consensus protocol illustrated: two-phase voting protocol and the locking and unlocking mechanism
Part 3. Weighted round-robin proposer selection algorithm used in Tendermint project
Any consensus agreement that is ultimately reached is the General Agreement, that is, the majority opinion. The consensus protocol on which the blockchain system operates is no exception. As a distributed system, the blockchain system aims to maintain the validity of the system. Intuitively, the validity of the blockchain system has two meanings: firstly, there is no ambiguity, and secondly, it can process requests to update its status. The former corresponds to the safety requirements of distributed systems, while the latter to the requirements of liveness. The validity of distributed systems is mainly maintained by consensus protocols, considering the multiple nodes and network communication involved in such systems may be unstable, which has brought huge challenges to the design of consensus protocols.

## The semi-synchronous network model and Byzantine fault tolerance

Researchers of distributed systems characterize these problems that may occur in nodes and network communications using node failure models and network models. The fail-stop failure in node failure models refers to the situation where the node itself stops running due to configuration errors or other reasons, thus unable to go on with the consensus protocol. This type of failure will not cause side effects on other parts of the distributed system except that the node itself stops running. However, for such distributed systems as the public blockchain, when designing a consensus protocol, we still need to consider the evildoing intended by nodes besides their failure. These incidents are all included in the Byzantine Failure model, which covers all unexpected situations that may occur on the node, for example, passive downtime failures and any deviation intended by the nodes from the consensus protocol. For a better explanation, downtime failures refer to nodes’ passive running halt, and the Byzantine failure to any arbitrary deviation of nodes from the consensus protocol.
Compared with the node failure model which can be roughly divided into the passive and active models, the modeling of network communication is more difficult. The network itself suffers problems of instability and communication delay. Moreover, since all network communication is ultimately completed by the node which may have a downtime failure or a Byzantine failure in itself, it is usually difficult to define whether such failure arises from the node or the network itself when a node does not receive another node's network message. Although the network communication may be affected by many factors, the researchers found that the network model can be classified by the communication delay. For example, the node may fail to send data packages due to the fail-stop failure, and as a result, the corresponding communication delay is unknown and can be any value. According to the concept of communication delay, the network communication model can be divided into the following three categories:
• The synchronous network model: There is a fixed, known upper bound of delay $\Delta$ in network communication. Under this model, the maximum delay of network communication between two nodes in the network is $\Delta$. Even if there is a malicious node, the communication delay arising therefrom does not exceed $\Delta$.
• The asynchronous network model: There is an unknown delay in network communication, with the upper bound of the delay known, but the message can still be successfully delivered in the end. Under this model, the network communication delay between two nodes in the network can be any possible value, that is, a malicious node, if any, can arbitrarily extend the communication delay.
• The semi-synchronous network model: Assume that there is a Global Stabilization Time (GST), before which it is an asynchronous network model and after which, a synchronous network model. In other words, there is a fixed, known upper bound of delay in network communication $\Delta$. A malicious node can delay the GST arbitrarily, and there will be no notification when no GST occurs. Under this model, the delay in the delivery of the message at the time $T$ is $\Delta + max(T, GST)$.
The synchronous network model is the most ideal network environment. Every message sent through the network can be received within a predictable time, but this model cannot reflect the real network communication situation. As in a real network, network failures are inevitable from time to time, causing the failure in the assumption of the synchronous network model. Yet the asynchronous network model goes to the other extreme and cannot reflect the real network situation either. Moreover, according to the FLP (Fischer-Lynch-Paterson) theorem, under this model if there is one node fails, no consensus protocol will reach consensus in a limited time. In contrast, the semi-synchronous network model can better describe the real-world network communication situation: network communication is usually synchronous or may return to normal after a short time. Such an experience must be no stranger to everyone: the web page, which usually gets loaded quite fast, opens slowly every now and then, and you need to try before you know the network is back to normal since there is usually no notification. The peer-to-peer (P2P) network communication, which is widely used in blockchain projects, also makes it possible for a node to send and receive information from multiple network channels. It is unrealistic to keep blocking the network information transmission of a node for a long time. Therefore, all the discussion below is under the semi-synchronous network model.
The design and selection of consensus protocols for public chain networks that allow nodes to dynamically join and leave need to consider possible Byzantine failures. Therefore, the consensus protocol of a public chain network is designed to guarantee the security and liveness of the network under the semi-synchronous network model on the premise of possible Byzantine failure. Researchers of distributed systems point out that to ensure the security and liveness of the system, the consensus protocol itself needs to meet three requirements:
• Validity: The value reached by honest nodes must be the value proposed by one of them
• Agreement: All honest nodes must reach consensus on the same value
• Termination: The honest nodes must eventually reach consensus on a certain value
Validity and agreement can guarantee the security of the distributed system, that is, the honest nodes will never reach a consensus on a random value, and once the consensus is reached, all honest nodes agree on this value. Termination guarantees the liveness of distributed systems. A distributed system unable to reach consensus is useless.

## The CAP theorem and Byzantine Generals Problem

In a semi-synchronous network, is it possible to design a Byzantine fault-tolerant consensus protocol that satisfies validity, agreement, and termination? How many Byzantine nodes can a system tolerance? The CAP theorem and Byzantine Generals Problem provide an answer for these two questions and have thus become the basic guidelines for the design of Byzantine fault-tolerant consensus protocols.
Lamport, Shostak, and Pease abstracted the design of the consensus mechanism in the distributed system in 1982 as the Byzantine Generals Problem, which refers to such a situation as described below: several generals each lead the army to fight in the war, and their troops are stationed in different places. The generals must formulate a unified action plan for the victory. However, since the camps are far away from each other, they can only communicate with each other through the communication soldiers, or, in other words, they cannot appear on the same occasion at the same time to reach a consensus. Unfortunately, among the generals, there is a traitor or two who intend to undermine the unified actions of the loyal generals by sending the wrong information, and the communication soldiers cannot send the message to the destination by themselves. It is assumed that each communication soldier can prove the information he has brought comes from a certain general, just as in the case of a real BFT consensus protocol, each node has its public and private keys to establish an encrypted communication channel for each other to ensure that its messages will not be tampered with in the network communication, and the message receiver can also verify the sender of the message based thereon. As already mentioned, any consensus agreement ultimately reached represents the consensus of the majority. In the process of generals communicating with each other for an offensive or retreat, a general also makes decisions based on the majority opinion from the information collected by himself.
According to the research of Lamport et al, if there are 1/3 or more traitors in the node, the generals cannot reach a unified decision. For example, in the following figure, assume there are 3 generals and only 1 traitor. In the figure on the left, suppose that General C is the traitor, and A and B are loyal. If A wants to launch an attack and informs B and C of such intention, yet the traitor C sends a message to B, suggesting what he has received from A is a retreat. In this case, B can't decide as he doesn't know who the traitor is, and the information received is insufficient for him to decide. If A is a traitor, he can send different messages to B and C. Then C faithfully reports to B the information he received. At this moment as B receives conflicting information, he cannot make any decisions. In both cases, even if B had received consistent information, it would be impossible for him to spot the traitor between A and C. Therefore, it is obvious that in both situations shown in the figure below, the honest General B cannot make a choice.
According to this conclusion, when there are $n$ generals with at most $f$ traitors (n≤3f), the generals cannot reach a consensus if $n \leq 3f$; and with $n > 3f$, a consensus can be reached. This conclusion also suggests that when the number of Byzantine failures $f$ exceeds 1/3 of the total number of nodes $n$ in the system $f \ge n/3$ , no consensus will be reached on any consensus protocol among all honest nodes. Only when $f < n/3$, such condition is likely to happen, without loss of generality, and for the subsequent discussion on the consensus protocol, $n \ge 3f + 1$ by default.
The conclusion reached by Lamport et al. on the Byzantine Generals Problem draws a line between the possible and the impossible in the design of the Byzantine fault tolerance consensus protocol. Within the possible range, how will the consensus protocol be designed? Can both the security and liveness of distributed systems be fully guaranteed? Brewer provided the answer in his CAP theorem in 2000. It indicated that a distributed system requires the following three basic attributes, but any distributed system can only meet two of the three at the same time.
1. Consistency: When any node responds to the request, it must either provide the latest status information or provide no status information
2. Availability: Any node in the system must be able to continue reading and writing
3. Partition Tolerance: The system can tolerate the loss of any number of messages between two nodes and still function normally

https://preview.redd.it/1ozfwk7u7m851.png?width=1400&format=png&auto=webp&s=fdee6318de2cf1c021e636654766a7a0fe7b38b4
A distributed system aims to provide consistent services. Therefore, the consistency attribute requires that the two nodes in the system cannot provide conflicting status information or expired information, which can ensure the security of the distributed system. The availability attribute is to ensure that the system can continuously update its status and guarantee the availability of distributed systems. The partition tolerance attribute is related to the network communication delay, and, under the semi-synchronous network model, it can be the status before GST when the network is in an asynchronous status with an unknown delay in the network communication. In this condition, communicating nodes may not receive information from each other, and the network is thus considered to be in a partitioned status. Partition tolerance requires the distributed system to function normally even in network partitions.
The proof of the CAP theorem can be demonstrated with the following diagram. The curve represents the network partition, and each network has four nodes, distinguished by the numbers 1, 2, 3, and 4. The distributed system stores color information, and all the status information stored by all nodes is blue at first.
1. Partition tolerance and availability mean the loss of consistency: When node 1 receives a new request in the leftmost image, the status changes to red, the status transition information of node 1 is passed to node 3, and node 3 also updates the status information to red. However, since node 3 and node 4 did not receive the corresponding information due to the network partition, the status information is still blue. At this moment, if the status information is queried through node 2, the blue returned by node 2 is not the latest status of the system, thus losing consistency.
2. Partition tolerance and consistency mean the loss of availability: In the middle figure, the initial status information of all nodes is blue. When node 1 and node 3 update the status information to red, node 2 and node 4 maintain the outdated information as blue due to network partition. Also when querying status information through node 2, you need to first ask other nodes to make sure you’re in the latest status before returning status information as node 2 needs to follow consistency, but because of the network partition, node 2 cannot receive any information from node 1 or node 3. Then node 2 cannot determine whether it is in the latest status, so it chooses not to return any information, thus depriving the system of availability.
3. Consistency and availability mean the loss of the partition tolerance: In the right-most figure, the system does not have a network partition at first, and both status updates and queries can go smoothly. However, once a network partition occurs, it degenerates into one of the previous two conditions. It is thus proved that any distributed system cannot have consistency, availability, and partition tolerance all at the same time.

The discovery of the CAP theorem seems to declare that the aforementioned goals of the consensus protocol is impossible. However, if you’re careful enough, you may find from the above that those are all extreme cases, such as network partitions that cause the failure of information transmission, which could be rare, especially in P2P network. In the second case, the system rarely returns the same information with node 2, and the general practice is to query other nodes and return the latest status as believed after a while, regardless of whether it has received the request information of other nodes. Therefore, although the CAP theorem points out that any distributed system cannot satisfy the three attributes at the same time, it is not a binary choice, as the designer of the consensus protocol can weigh up all the three attributes according to the needs of the distributed system. However, as the communication delay is always involved in the distributed system, one always needs to choose between availability and consistency while ensuring a certain degree of partition tolerance. Specifically, in the second case, it is about the value that node 2 returns: a probably outdated value or no value. Returning the possibly outdated value may violate consistency but guarantees availability; yet returning no value deprives the system of availability but guarantees its consistency. Tendermint consensus protocol to be introduced is consistent in this trade-off. In other words, it will lose availability in some cases.
The genius of Satoshi Nakamoto is that with constraints of the CAP theorem, he managed to reach a reliable Byzantine consensus in a distributed network by combining PoW mechanism, Satoshi Nakamoto consensus, and economic incentives with appropriate parameter configuration. Whether Bitcoin's mechanism design solves the Byzantine Generals Problem has remained a dispute among academicians. Garay, Kiayias, and Leonardos analyzed the link between Bitcoin mechanism design and the Byzantine consensus in detail in their paper The Bitcoin Backbone Protocol: Analysis and Applications. In simple terms, the Satoshi Consensus is a probabilistic Byzantine fault-tolerant consensus protocol that depends on such conditions as the network communication environment and the proportion of malicious nodes' hashrate. When the proportion of malicious nodes’ hashrate does not exceed 1/2 in a good network communication environment, the Satoshi Consensus can reliably solve the Byzantine consensus problem in a distributed environment. However, when the environment turns bad, even with the proportion within 1/2, the Satoshi Consensus may still fail to reach a reliable conclusion on the Byzantine consensus problem. It is worth noting that the quality of the network environment is relative to Bitcoin's block interval. The 10-minute block generation interval of the Bitcoin can ensure that the system is in a good network communication environment in most cases, given the fact that the broadcast time of a block in the distributed network is usually just several seconds. In addition, economic incentives can motivate most nodes to actively comply with the agreement. It is thus considered that with the current Bitcoin network parameter configuration and mechanism design, the Bitcoin mechanism design has reliably solved the Byzantine Consensus problem in the current network environment.

## Practical Byzantine Fault Tolerance, PBFT

It is not an easy task to design the Byzantine fault-tolerant consensus protocol in a semi-synchronous network. The first practically usable Byzantine fault-tolerant consensus protocol is the Practical Byzantine Fault Tolerance (PBFT) designed by Castro and Liskov in 1999, the first of its kind with polynomial complexity. For a distributed system with $n$ nodes, the communication complexity is $O(n2$.) Castro and Liskov showed in the paper that by transforming centralized file system into a distributed one using the PBFT protocol, the overwall performance was only slowed down by 3%. In this section we will briefly introduce the PBFT protocol, paving the way for further detailed explanations of the Tendermint protocol and the improvements of the Tendermint protocol.
The PBFT protocol that includes $n=3f+1$ nodes can tolerate up to $f$ Byzantine nodes. In the original paper of PBFT, full connection is required among all the $n$ nodes, that is, any two of the n nodes must be connected. All the nodes of the network jointly maintain the system status through network communication. In the Bitcoin network, a node can participate in or exit the consensus process through hashrate mining at any time, which is managed by the administrator, and the PFBT protocol needs to determine all the participating nodes before the protocol starts. All nodes in the PBFT protocol are divided into two categories, master nodes, and slave nodes. There is only one master node at any time, and all nodes take turns to be the master node. All nodes run in a rotation process called View, in each of which the master node will be reelected. The master node selection algorithm in PBFT is very simple: all nodes become the master node in turn by the index number. In each view, all nodes try to reach a consensus on the system status. It is worth mentioning that in the PBFT protocol, each node has its own digital signature key pair. All sent messages (including request messages from the client) need to be signed to ensure the integrity of the message in the network and the traceability of the message itself. (You can determine who sent a message based on the digital signature).
The following figure shows the basic flow of the PBFT consensus protocol. Assume that the current view’s master node is node 0. Client C initiates a request to the master node 0. After the master node receives the request, it broadcasts the request to all slave nodes that process the request of client C and return the result to the client. After the client receives f+1 identical results from different nodes (based on the signature value), the result can be taken as the final result of the entire operation. Since the system can have at most f Byzantine nodes, at least one of the f+1 results received by the client comes from an honest node, and the security of the consensus protocol guarantees that all honest nodes will reach consensus on the same status. So, the feedback from 1 honest node is enough to confirm that the corresponding request has been processed by the system.

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For the status synchronization of all honest nodes, the PBFT protocol has two constraints on each node: on one hand, all nodes must start from the same status, and on the other, the status transition of all nodes must be definite, that is, given the same status and request, the results after the operation must be the same. Under these two constraints, as long as the entire system agrees on the processing order of all transactions, the status of all honest nodes will be consistent. This is also the main purpose of the PBFT protocol: to reach a consensus on the order of transactions between all nodes, thereby ensuring the security of the entire distributed system. In terms of availability, the PBFT consensus protocol relies on a timeout mechanism to find anomalies in the consensus process and start the View Change protocol in time to try to reach a consensus again.
The figure above shows a simplified workflow of the PBFT protocol. Where C is the client, 0, 1, 2, and 3 represent 4 nodes respectively. Specifically, 0 is the master node of the current view, 1, 2, 3 are slave nodes, and node 3 is faulty. Under normal circumstances, the PBFT consensus protocol reaches consensus on the order of transactions between nodes through a three-phase protocol. These three phases are respectively: Pre-Prepare, Prepare, and Commit:
• The master node of the pre-preparation node is responsible for assigning the sequence number to the received client request, and broadcasting the message to the slave node. The message contains the hash value of the client request d, the sequence number of the current viewv, the sequence number n assigned by the master node to the request, and the signature information of the master nodesig. The scheme design of the PBFT protocol separates the request transmission from the request sequencing process, and the request transmission is not to be discussed here. The slave node that receives the message accepts the message after confirming the message is legitimate and enter preparation phase. The message in this step checks the basic signature, hash value, current view, and, most importantly, whether the master node has given the same sequence number to other request from the client in the current view.
• In preparation, the slave node broadcasts the message to all nodes (including itself), indicating that it assigns the sequence number n to the client request with the hash value d under the current view v, with its signaturesig as proof. The node receiving the message will check the correctness of the signature, the matching of the view sequence number, etc., and accept the legitimate message. When the PRE-PREPARE message about a client request (from the main node) received by a node matches with the PREPARE from 2f slave nodes, the system has agreed on the sequence number requested by the client in the current view. This means that 2f+1 nodes in the current view agree with the request sequence number. Since it contains information from at most fmalicious nodes, there are a total of f+1 honest nodes that have agreed with the allocation of the request sequence number. With f malicious nodes, there are a total of 2f+1 honest nodes, so f+1represents the majority of the honest nodes, which is the consensus of the majority mentioned before.
• After the node (including the master node and the slave node) receives a PRE-PREPARE message requested by the client and 2f PREPARE messages, the message is broadcast across the network and enters the submission phase. This message is used to indicate that the node has observed that the whole network has reached a consensus on the sequence number allocation of the request message from the client. When the node receives 2f+1 COMMIT messages, there are at least f+1 honest nodes, that is, most of the honest nodes have observed that the entire network has reached consensus on the arrangement of sequence numbers of the request message from the client. The node can process the client request and return the execution result to the client at this moment.
Roughly speaking, in the pre-preparation phase, the master node assigns a sequence number to all new client requests. During preparation, all nodes reach consensus on the client request sequence number in this view, while in submission the consistency of the request sequence number of the client in different views is to be guaranteed. In addition, the design of the PBFT protocol itself does not require the request message to be submitted by the assigned sequence number, but out of order. That can improve the efficiency of the implementation of the consensus protocol. Yet, the messages are still processed by the sequence number assigned by the consensus protocol for the consistency of the distributed system.
In the three-phase protocol execution of the PBFT protocol, in addition to maintaining the status information of the distributed system, the node itself also needs to log all kinds of consensus information it receives. The gradual accumulation of logs will consume considerable system resources. Therefore, the PBFT protocol additionally defines checkpoints to help the node deal with garbage collection. You can set a checkpoint every 100 or 1000 sequence numbers according to the request sequence number. After the client request at the checkpoint is executed, the node broadcasts messages throughout the network, indicating that after the node executes the client request with sequence number n, the hash value of the system status is d, and it is vouched by its own signature sig. After 2f+1 matching CHECKPOINT messages (one of which can come from the node itself) are received, most of the honest nodes in the entire network have reached a consensus on the system status after the execution of the client request with the sequence numbern, and then you can clear all relevant log records of client requests with the sequence number less than n. The node needs to save these2f+1 CHECKPOINTmessages as proof of the legitimate status at this moment, and the corresponding checkpoint is called a stable checkpoint.
The three-phase protocol of the PBFT protocol can ensure the consistency of the processing order of the client request, and the checkpoint mechanism is set to help nodes perform garbage collection and further ensures the status consistency of the distributed system, both of which can guarantee the security of the distributed system aforementioned. How is the availability of the distributed system guaranteed? In the semi-synchronous network model, a timeout mechanism is usually introduced, which is related to delays in the network environment. It is assumed that the network delay has a known upper bound after GST. In such condition, an initial value is usually set according to the network condition of the system deployed. In case of a timeout event, besides the corresponding processing flow triggered, additional mechanisms will be activated to readjust the waiting time. For example, an algorithm like TCP's exponential back off can be adopted to adjust the waiting time after a timeout event.
To ensure the availability of the system in the PBFT protocol, a timeout mechanism is also introduced. In addition, due to the potential the Byzantine failure in the master node itself, the PBFT protocol also needs to ensure the security and availability of the system in this case. When the Byzantine failure occurs in the master node, for example, when the slave node does not receive the PRE-PREPARE message or the PRE-PREPARE message sent by the master node from the master node within the time window and is thus determined to be illegitimate, the slave node can broadcast to the entire network, indicating that the node requests to switch to the new view with sequence number v+1. n indicates the request sequence number corresponding to the latest stable checkpoint local to the node, and C is to prove the stable checkpoint 2f+1 legitimate CHECKPOINT messages as aforementioned. After the latest stable checkpoint and before initiating the VIEWCHANGE message, the system may have reached a consensus on the sequence numbers of some request messages in the previous view. To ensure the consistency of these request sequence numbers to be switched in the view, the VIEWCHANGE message needs to carry this kind of the information to the new view, which is also the meaning of the P field in the message. P contains all the client request messages collected at the node with a request sequence number greater than n and the proof that a consensus has been reached on the sequence number in the node: the legitimate PRE-PREPARE message of the request and 2f matching PREPARE messages. When the master node in view v+1 collects 2f+1 VIEWCHANGE messages, it can broadcast the NEW-VIEW message and take the entire system into a new view. For the security of the system in combination with the three-phase protocol of the PBFT protocol, the construction rules of the NEW-VIEW information are designed in a quite complicated way. You can refer to the original paper of PBFT for more details.

VIEWCHANGE contains a lot of information. For example, C contains 2f+1 signature information, P contains several signature sets, and each set has 2f+1 signature. At least 2f+1 nodes need to send a VIEWCHANGE message before prompting the system to enter the next new view, and that means, in addition to the complex logic of constructing the information of VIEWCHANGE and NEW-VIEW, the communication complexity of the view conversion protocol is $O(n2$.) Such complexity also limits the PBFT protocol to support only a few nodes, and when there are 100 nodes, it is usually too complex to practically deploy PBFT. It is worth noting that in some materials the communication complexity of the PBFT protocol is inappropriately attributed to the full connection between n nodes. By changing the fully connected network topology to the P2P network topology based on distributed hash tables commonly used in blockchain projects, high communication complexity caused by full connection can be conveniently solved, yet still, it is difficult to improve the communication complexity during the view conversion process. In recent years, researchers have proposed to reduce the amount of communication in this step by adopting aggregate signature scheme. With this technology, 2f+1 signature information can be compressed into one, thereby reducing the communication volume during view change.