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A cryptocurrency or crypto currency is a controversial coingecko ethereum logo [2] digital asset designed to work as a medium of exchange that uses cryptography to secure its transactions, to control the creation of additional units, and to verify the transfer of assets. Cryptocurrencies use decentralized control [6] as opposed to centralized electronic money and central banking systems.

Bitcoincreated inwas the first decentralized cryptocurrency. According to Jan Lansky, a cryptocurrency is a system that meets six conditions: In Marchthe word " cryptocurrency " was added to the Merriam-Webster Dictionary. Decentralized cryptocurrency is produced by the entire coingecko ethereum logo system collectively, at a rate which is defined when the system is created and which is publicly known. In centralized banking and economic systems such as the Federal Reserve Systemcorporate boards or governments control the supply of currency by printing units of fiat money or demanding additions to digital banking ledgers.

In case of decentralized cryptocurrency, companies or governments cannot produce new units, and have not so far provided backing for other firms, banks or corporate entities which hold asset value measured in it.

The underlying technical system upon which decentralized cryptocurrencies are based was created by the group or individual known as Satoshi Nakamoto. As of May [update]over 1, cryptocurrency coingecko ethereum logo existed. Most cryptocurrencies are designed to gradually decrease production of that currency, placing coingecko ethereum logo cap on the total amount of that currency that will ever be in circulation. The validity of each cryptocurrency's coins is provided by a blockchain.

A blockchain is a continuously growing list of recordscalled blockswhich are linked and secured using cryptography. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way". Once recorded, the data coingecko ethereum logo any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.

Blockchains are secure by design and coingecko ethereum logo an example of a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been achieved with a blockchain. The block time is the average time it takes for the network to generate one extra block in the blockchain. This is coingecko ethereum logo when the money transaction takes place, so coingecko ethereum logo shorter block time means faster coingecko ethereum logo.

Cryptocurrencies use various timestamping schemes to avoid the need for a coingecko ethereum logo third party to timestamp transactions added to the blockchain ledger. The first timestamping scheme invented was the proof-of-work scheme. The most widely used proof-of-work schemes are based on SHA and scrypt. It is different from proof-of-work systems that run difficult hashing algorithms to validate electronic transactions.

The scheme is largely dependent on the coin, and there's currently no standard form of it. In cryptocurrency networks, mining is a validation of transactions. For this effort, successful miners obtain new cryptocurrency as a reward. The reward decreases transaction fees by creating a complementary coingecko ethereum logo to contribute to the processing power of the network.

Thus the value of the currency obtained for finding a hash often does not justify the amount of money spent on coingecko ethereum logo up the machines, the cooling facilities to overcome the enormous amount of heat they produce, and the electricity required to run them. Some miners pool resourcessharing their processing power over a network to split the reward equally, according to the amount of work they contributed to the probability of finding a block. A "share" is awarded to members of the mining pool who present a valid partial proof-of-work.

One company is operating data centers for mining operations at Canadian oil and gas field sites, due to low gas prices. Given the economic and environmental concerns associated with mining, various "minerless" cryptocurrencies are undergoing active development.

Other cryptocurrencies like Nano utilise a block-lattice structure whereby each individual account has its own blockchain. With each account controlling its own transactions, no traditional proof-of-work mining is required, allowing for feeless, instantaneous transactions. Some Chinese miners have since relocated to Canada. However, the cryptocurrency mania might have gone a little too far in Iceland.

In Marcha town in Upstate Coingecko ethereum logo York put an 18 month moratorium on all cryptocurrency mining in an effort to preserve natural resources and the "character and direction" of the city.

A cryptocurrency wallet stores the public and private "keys" or "addresses" which can be used to receive or spend the cryptocurrency. With the coingecko ethereum logo key, it is possible to write in the public ledger, effectively spending the associated cryptocurrency.

With the public key, it is possible for others to send currency to the wallet. Bitcoin is pseudonymous rather than anonymous in that the cryptocurrency within a wallet is not tied to people, but rather to one or more specific keys or "addresses". Additions such as Zerocoin have been suggested, which would allow for true anonymity.

Cryptocurrencies are used primarily outside existing banking and governmental institutions and are exchanged over the Internet. While these alternative, decentralized modes of exchange are in the early stages of development, they have the unique potential to challenge existing systems of currency and payments. Transaction coingecko ethereum logo for cryptocurrency depend mainly on the supply of network capacity at the time, versus the demand from the currency holder for a faster transaction.

The currency holder can choose coingecko ethereum logo specific transaction fee, while network entities process transactions in order of highest offered fee to coingecko ethereum logo. Cryptocurrency exchanges can simplify the process for currency holders by offering priority alternatives and thereby determine which fee will likely cause the transaction to be processed in the requested time.

For ethertransaction fees differ by computational complexity, bandwidth use and storage needs, while bitcoin transactions compete equally with each other. The legal coingecko ethereum logo of cryptocurrencies varies substantially from country to country and is still undefined or changing in many of them.

While some countries have explicitly allowed their use and trade, [41] others have banned or restricted it. Likewise, various government agencies, departments, and courts have classified bitcoins differently.

China Central Bank banned the handling of bitcoins by financial institutions in China in early This means bitcoin will be subject to coingecko ethereum logo gains tax.

Legal issues not dealing with governments have also arisen for cryptocurrencies. Coinyefor example, is an altcoin that used rapper Kanye West as its logo without permission.

Upon hearing of the release of Coinye, originally called Coinye West, attorneys for Kanye West sent a cease and desist letter to the email operator of Coinye, David P. The letter stated that Coinye was willful trademark infringement, unfair competition, cyberpiracy, and dilution and instructed Coinye to stop using the likeness and name of Kanye West. A primary example of this new challenge for law enforcement comes from the Silk Road case, where Ulbricht's bitcoin stash "was held separately and As the popularity of and demand for online currencies has increased since the inception of bitcoin in[48] [49] so have concerns that such an unregulated person to person global economy that cryptocurrencies offer may become a threat to society.

Concerns abound that altcoins may become tools for anonymous web coingecko ethereum logo. Cryptocurrency networks display a lack of regulation that has been criticized as enabling criminals who seek to evade taxes and coingecko ethereum logo money.

Transactions that occur through the use and exchange of these altcoins are independent coingecko ethereum logo formal banking systems, and therefore can make tax coingecko ethereum logo simpler for individuals. Since charting taxable income coingecko ethereum logo based upon what a recipient reports to the revenue service, it becomes extremely difficult to account for transactions made using existing cryptocurrencies, a mode of exchange that is complex and difficult to track. Systems of anonymity that most cryptocurrencies offer can also serve as a simpler means to launder money.

Rather than laundering money through an intricate net of financial actors and offshore bank accounts, laundering money through altcoins can be achieved through anonymous transactions. GBL, a Chinese bitcoin trading platform, suddenly shut down on October 26, In February the world's largest bitcoin exchange, Mt. Goxdeclaring bankruptcy. Homero Josh Garza, coingecko ethereum logo founded the cryptocurrency startups GAW Miners and ZenMiner inacknowledged in a coingecko ethereum logo agreement that the companies were part of a coingecko ethereum logo schemeand pleaded guilty to wire fraud in The SEC's complaint stated that Garza, through his companies, had fraudulently sold "investment contracts representing shares in the profits they claimed would be generated" from mining.

Tether indicates that it is building a new core for its primary wallet in response to the attack in order to prevent the stolen coins from being used. Cryptocurrency is also used in controversial settings in the form of online black marketssuch as Silk Road. The original Silk Road was shut down in October and there have been two more versions in use since then.

In the year following the initial shutdown of Silk Road, the number of prominent dark coingecko ethereum logo increased from four to twelve, while the amount of drug listings increased from 18, to 32, Darknet markets present challenges in regard to legality.

Bitcoins and other forms of cryptocurrency used in dark markets coingecko ethereum logo not clearly or legally classified in almost all parts of the world. This type of ambiguous classification puts pressure on law enforcement agencies around the world to adapt to the shifting drug trade of dark markets. An initial coin offering ICO is a controversial means of raising funds for a new cryptocurrency venture.

An ICO may be used by startups with the intention of avoiding regulation. However, securities regulators in many jurisdictions, including in the U. In coingecko ethereum logo ICO campaign, a percentage of the cryptocurrency usually in the form of "tokens" is sold to early backers of the project in exchange for legal tender or other cryptocurrencies, often bitcoin or ether. It covers studies of cryptocurrencies and related technologies, and is published by the University of Pittsburgh.

Authors are also asked to include a personal bitcoin address in the first page of their papers. Coingecko ethereum logo have been compared to Ponzi schemespyramid schemes [69] and economic bubbles[70] such as housing market bubbles.

While cryptocurrencies are digital currencies that are managed through advanced encryption techniques, many governments have taken a cautious approach toward them, fearing their lack of central control and the effects they could have on financial security. An enormous amount of energy goes into proof-of-work cryptocurrency mining, although cryptocurrency proponents claim it is important to compare it to the consumption of the traditional financial system. There are also purely technical elements to consider.

For example, technological advancement in cryptocurrencies such as bitcoin result in high up-front costs to miners in the form of specialized hardware and software.

Additionally, cryptocurrency can be permanently lost from local storage due to malware or data loss. This can also happen through the destruction of the physical media, effectively removing lost cryptocurrencies forever from their markets. The cryptocurrency community refers to pre-mining, hidden launches, ICO or extreme rewards for the coingecko ethereum logo founders as a deceptive practice. Paul KrugmanNobel Memorial Prize in Economic Coingecko ethereum logo winner does not like bitcoin, has repeated numerous times that it is a bubble that will not last [84] and links it to Tulip mania.

American business magnate Warren Buffett thinks that cryptocurrency will come to a bad coingecko ethereum logo. The sudden increase in cryptocurrency mining increased the demand of graphics cards GPU in Miners regularly buy up the entire stock of new GPU's as soon as they are available, further driving prices up. Nvidia is reportedly asking retailers to do what they can when it comes to selling GPUs to gamers instead of miners. In the American cryptographer David Chaum conceived an anonymous cryptographic electronic money called ecash.

This allowed the digital currency to be untraceable by coingecko ethereum logo issuing bank, the government, or a third party. InWei Dai published a description of "b-money", an anonymous, distributed electronic cash system.

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How to install gekko on windowsa free bitcoin trading bot updated apr 24 2018

The best API for getting free cryptocurrency live pricing data, OHLC historical data, volume data, tick data or block explorer data from multiple exchanges and blockchains. We have integrated with over 90 exchanges, coins and have over 22, trading pairs listed. Please make sure you credit us with a link if you use our data on your website or app. Some of the great services using our pricing API: Sign up for API updates here. Most of the requests that are related to pricing data are public at the moment and generally available via GET functions.

Please do not abuse them, a request every 10 sec should be more than enough. There is also a streaming api based on socket.

At the moment the public rest api and streaming apis are not delayed. You can see the limits here: CryptoCompare uses session cookies to allow access to private data. You can obtain the cookie by logging in. A session key is only valid for 30 days and it has a sliding window period, so each time you use it, it will get extended by 30 days.

Type less than will mean there was an error. This section deals with all the requests for price data, social data and historical data. Most of it is used for dealing with subscription, top list, historical and snapshot data. Get the latest price for a list of one or more currencies.

Really fast, ms. Cached each 10 seconds. Get all the current trading info price, vol, open, high, low etc of any list of cryptocurrencies in any other currency that you need.

If the crypto does not trade directly into the toSymbol requested, BTC will be used for conversion. This API also returns Display values for all the fields. If the opposite pair trades we invert it eg.: Compute the current trading info price, vol, open, high, low etc of the requested pair as a volume weighted average based on the markets requested.

Get day average price. The values are based on hourly vwap data and the average can be calculated in different waysIt uses BTC conversion if data is not available because the coin is not trading in the specified currency. If tryConversion is set to false it will give you the direct data. If no toTS is given it will automatically do the current day. Get the price of any cryptocurrency in any other currency that you need at a given timestamp.

The price comes from the daily info - so it would be the price at the end of the day GMT based on the requested TS. Tries to get direct trading pair data, if there is none or it is more than 30 days before the ts requested, it uses BTC conversion. Get data for a currency pair. It returns general block explorer information, aggregated data and individual data for each exchange available. This api is getting abused and will be moved to a min-api path in the near future.

Please try not to use it. Get the general, subs used to connect to the streamer and to figure out what exchanges we have data for and what are the exact coin pairs of the coin and the aggregated prices for all pairs available.

AggregatedPrices Array[] yes Snapshot data about the coin volume, price, open, high, low close etc. If called with the id of a cryptopian you just get data from our website that is available to the public.

UrlstringnoThe relative path without https: Get open, high, low, close, volumefrom and volumeto from the each minute historical data. This data is only stored for 7 days, if you need more,use the hourly or daily path. It uses BTC conversion if data is not available because the coin is not trading in the specified currency. The values are based on Used to get all the mining equipment available on the website. It returns an array of mining equipment objects.

Get top pairs by volume for a currency always uses our aggregated data. The number of pairs you get is the minimum of the limit you set default 5 and the total number of pairs available.

Get real-time market data updates by connecting to our web socket ' wss: We are using socket. For more example code click here. Subscribe to market data by emitting 'SubAdd' including a list of items you want to get updates on.

After the first response, only updates will be sent. The MaskInt parameter maps the response to the properties. Use our utility functions to map the response, you can find the code here. Introduction The best API for getting free cryptocurrency live pricing data, OHLC historical data, volume data, tick data or block explorer data from multiple exchanges and blockchains. Requests Most of the requests that are related to pricing data are public at the moment and generally available via GET functions.

Sessions A session key is only valid for 30 days and it has a sliding window period, so each time you use it, it will get extended by 30 days. Note that the responses to all requests, both public and private, are sent as the response body.

Data This section deals with all the requests for price data, social data and historical data. Data Object yes Empty if there is no data to return or there is an error Data [Symbol]: Id int yes The internal id, this is used in other calls Data [Symbol]: ImageUrl string yes The logo image of the coin Data [Symbol]: CoinName string yes The name Data [Symbol]: FullName string yes A combination of the name and the symbol Data [Symbol]: Algorithm string yes The algorithm of the cryptocurrency Data [Symbol]: ProofType string yes The proof type of the cryptocurrency Data [Symbol]: Invalid Market ", "Data": For PST you would pass -8 for example.

URL Parameters Parameter Type Mandatory Description fsym string yes The symbol of the currency you want to get that for tsym string yes The symbol of the currency that data will be in. Return data Parameter Type Always returned Description Response string yes The type of the response Success or Error Message string yes The message for the response Type integer yes Integer representing the type of response.

Data object yes Empty if there is no data to return or there is an error Data: Algorithm string yes The algorithm of the from currency Data: BlockNumber integer yes The current block number delayed by 1 hour max Data: BlockReward integer yes The current block reward delayed by 1 hour max Data: AggregatedData object yes See success request example Data: What are you trying to do?

AggregatedPrices Array[] yes Snapshot data about the coin volume, price, open, high, low close etc Parameter Type Always returned Description Response string yes The type of the response Success or Error Message string yes The message for the response BaseImageUrl string yes The base url for all the images from the ImageUrl field BaseLinkUrl string yes The base url for all the links from the Url field Type int yes Integer representing the type of response.

General object yes The general data available for this coin Data: H1Text string yes The title used on our website a combination of the coin name and the symbol Data: ImageUrl string yes The relative path to the logo of the coin, prefix this value with the BaseImageUrl to get the absolute path Data: DangerTop string yes The text displayed in red on the website at the top, generally a big issue with the coin Data: WarningTop string yes The text displayed in yellow on the website at the top, generally an issue with the coin Data: InfoTop string yes The text displayed in green on the website at the top, generally an announcement or extra info that is important Data: Symbol string yes The symbol of the coin Data: Url string yes The relative path to the coin, prefix this value with the BaseLinkUrl to get the absolute path Data: Name string yes The name of the coin Data: Description string yes The description of the coin, this is returned as html Data: Features string yes The features of the coin, this is returned as html Data: Technology string yes The technology of the coin, this is returned as html Data: TotalCoinSupply int yes The maximum number of coins Data: StartDate string yes The day the first block was mined, so the day the coin actually came into existance Data: Twitter string yes The twitter address of the coin Data: TwitterWidgetId string yes The cryptocompare twitter widget id for this coin Data: Website string yes The coin official website Data: DifficultyAdjustment string yes The difficulty adjustment Data: BlockRewardReduction string yes The value by which the block reward is reduced when there is a block reward reduction Data: BlockNumber int yes The current block number delayed by 1 hour max Data: BlockTime int yes The estimated time it takes to mine a block Data: TotalCoinsMined int yes The current total coins mined delayed by 1 hour max Data: