Gas and payment
One very important concept in Ethereum is the concept of fees. Every computation that occurs as a result of a transaction on the Ethereum network incurs a fee — there’s no free lunch! This fee is paid in a denomination called “gas.”
Gas is the unit used to measure the fees required for a particular computation. Gas price is the amount of Ether you are willing to spend on every unit of gas, and is measured in “gwei.” “Wei” is the smallest unit of Ether, where 1⁰¹⁸ Wei represents 1 Ether. One gwei is 1,000,000,000 Wei.
With every transaction, a sender sets a gas limit and gas price. The product of gas price and gas limit represents the maximum amount of Wei that the sender is willing to pay for executing a transaction.
For example, let’s say the sender sets the gas limit to 50,000 and a gas price to 20 gwei. This implies that the sender is willing to spend at most 50,000 x 20 gwei = 1,000,000,000,000,000 Wei = 0.001 Ether to execute that transaction.
Image for post
Remember that the gas limit represents the maximum gas the sender is willing to spend money on. If they have enough Ether in their account balance to cover this maximum, they’re good to go. The sender is refunded for any unused gas at the end of the transaction, exchanged at the original rate.
Image for post
In the case that the sender does not provide the necessary gas to execute the transaction, the transaction runs “out of gas” and is considered invalid. In this case, the transaction processing aborts and any state changes that occurred are reversed, such that we end up back at the state of Ethereum prior to the transaction. Additionally, a record of the transaction failing gets recorded, showing what transaction was attempted and where it failed. And since the machine already expended effort to run the calculations before running out of gas, logically, none of the gas is refunded to the sender.
Image for post
Where exactly does this gas money go? All the money spent on gas by the sender is sent to the “beneficiary” address, which is typically the miner’s address. Since miners are expending the effort to run computations and validate transactions, miners receive the gas fee as a reward.
Image for post
Typically, the higher the gas price the sender is willing to pay, the greater the value the miner derives from the transaction. Thus, the more likely miners will be to select it. In this way, miners are free to choose which transactions they want to validate or ignore. In order to guide senders on what gas price to set, miners have the option of advertising the minimum gas price for which they will execute transactions.
There are fees for storage, too
Not only is gas used to pay for computation steps, it is also used to pay for storage usage. The total fee for storage is proportional to the smallest multiple of 32 bytes used.
Fees for storage have some nuanced aspects. For example, since increased storage increases the size of the Ethereum state database on all nodes, there’s an incentive to keep the amount of data stored small. For this reason, if a transaction has a step that clears an entry in the storage, the fee for executing that operation of is waived, AND a refund is given for freeing up storage space.
What’s the purpose of fees?
One important aspect of the way the Ethereum works is that every single operation executed by the network is simultaneously effected by every full node. However, computational steps on the Ethereum Virtual Machine are very expensive. Therefore, Ethereum smart contracts are best used for simple tasks, like running simple business logic or verifying signatures and other cryptographic objects, rather than more complex uses, like file storage, email, or machine learning, which can put a strain on the network. Imposing fees prevents users from overtaxing the network.
Ethereum is a Turing complete language. (In short, a Turing machine is a machine that can simulate any computer algorithm (for those not familiar with Turing machines, check out this and this). This allows for loops and makes Ethereum susceptible to the halting problem, a problem in which you cannot determine whether or not a program will run infinitely. If there were no fees, a malicious actor could easily try to disrupt the network by executing an infinite loop within a transaction, without any repercussions. Thus, fees protect the network from deliberate attacks.
You might be thinking, “why do we also have to pay for storage?” Well, just like computation, storage on the Ethereum network is a cost that the entire network has to take the burden of.
cryptocurrency mining курсы bitcoin preev bitcoin bitcoin miner nya bitcoin
bitcoin конвертер
bitcoin ммвб
вход bitcoin tether gps dog bitcoin bitcoin click bitcoin софт bitcoin анимация monero address bitcoin database ethereum addresses bitcoin описание bcn bitcoin blender bitcoin bonus bitcoin
вирус bitcoin token ethereum casinos bitcoin balance bitcoin bitcoin income kraken bitcoin rpc bitcoin tether usb bitcoin вложения блок bitcoin short bitcoin gadget bitcoin
micro bitcoin ava bitcoin перспектива bitcoin bitcoin jp торги bitcoin best bitcoin bitcoin надежность monero 1070 криптовалюта tether ethereum рост bitcoin school calculator bitcoin bitcoin аналоги bitcoin sportsbook forum ethereum алгоритм ethereum pool monero bitcoin motherboard
bitcoin satoshi java bitcoin bitcoin network bitcoin fan сложность bitcoin краны monero rise cryptocurrency bitcoin удвоитель bitcoin ммвб луна bitcoin ethereum web3 ethereum контракт bitcoin investing coinmarketcap bitcoin
bitcoin blockchain
bitcoin traffic
bitcoin plugin криптовалюта tether
bitcoin вектор monero майнер usa bitcoin зебра bitcoin проекта ethereum bitcoin анимация ethereum clix bitcoin талк shot bitcoin bitcoin block bitcoin 20 обменники bitcoin форки ethereum bitcoin фарм monero bitcoin лучшие ethereum windows
bitcoin основы bitcoin mining
bitcoin multibit fox bitcoin bitcoin kraken bitcoin c
anomayzer bitcoin биржа ethereum эфир ethereum bitcoin balance
bitcoin зарегистрировать monero miner pizza bitcoin cronox bitcoin clame bitcoin bitcoin play siiz bitcoin ethereum mine bitcoin fox coindesk bitcoin аккаунт bitcoin bitcoin ethereum bitcoin froggy email bitcoin bitcoin sha256 банк bitcoin новые bitcoin monero faucet bitcoin yandex bitcoin desk
bitcoin обменник monero windows 1 monero bitcoin android bitcoin easy bitcoin flapper bitcoin background wiki ethereum bitcoin завести статистика ethereum bitcoin авито
download bitcoin bitcoin explorer bitcoin bot exchange ethereum
bitcoin обсуждение bitcoin sportsbook bitcoin hardfork forecast bitcoin field bitcoin bitcoin fpga cms bitcoin erc20 ethereum bitcoin hardfork bitcoin вложить bitcoin de
it bitcoin bitcoin trader simple bitcoin ethereum обвал алгоритмы ethereum trezor ethereum bitcoin invest bitcoin расшифровка bitcoin основы bitcoin подтверждение bitcoin рубли bitcoin machine keepkey bitcoin lootool bitcoin bitcoin кредиты раздача bitcoin widget bitcoin bitcoin котировка
accepts bitcoin bitcoin china bitcoin clock ethereum mist bitcoin girls bitcoin database
forecast bitcoin bitcoin путин bitcoin алматы goldmine bitcoin bitcoin paypal статистика ethereum bitcoin store bitcoin markets обмен tether bitcoin обзор оплатить bitcoin ethereum акции ethereum токены bitcoin explorer bitcoin rotator заработать monero bitcoin ios china bitcoin bitcoin multibit краны monero amazon bitcoin bitcoin buying 6000 bitcoin bistler bitcoin bitcoin frog bitcoin asic java bitcoin bitcoin gif bitcoin bat bitcoin статья block bitcoin
bitcoin транзакции boom bitcoin ethereum форум make bitcoin ethereum валюта андроид bitcoin dark bitcoin excel bitcoin bitcoin source терминалы bitcoin bitcoin satoshi bitcoin capital hyip bitcoin майнер ethereum monero обмен Convergencebitcoin пирамиды игра ethereum
форк bitcoin bitcoin legal ethereum telegram hd bitcoin анонимность bitcoin
bitcoin pizza ethereum wallet bitcoin faucets monero стоимость coindesk bitcoin bitcoin brokers транзакции ethereum monero blockchain обменник tether форк bitcoin
bitcoin hunter moneybox bitcoin форк bitcoin bitcoin валюта nicehash monero monero blockchain bitcoin funding dark bitcoin суть bitcoin падение bitcoin bitcoin loans ethereum сайт bitcoin php
ethereum swarm coinbase ethereum New types of Ethereum transactionssatoshi bitcoin сколько bitcoin bitcoin cz fun bitcoin bitcoin исходники msigna bitcoin
bitcoin dump bitcoin community nvidia bitcoin
bitcoin иконка
coinder bitcoin ico bitcoin bitcoin metatrader check bitcoin dash cryptocurrency 1 ethereum bitcoin department
bitcoin me дешевеет bitcoin bitcoin paper ethereum цена tether android nanopool ethereum cryptocurrency dash цена ethereum раздача bitcoin сложность ethereum продажа bitcoin mini bitcoin bitcoin conf car bitcoin wikileaks bitcoin wild bitcoin film bitcoin testnet bitcoin bitcoin майнер
ubuntu bitcoin android tether transactions bitcoin bitcoin market bitcoin talk bitcoin alien падение ethereum
india bitcoin stealer bitcoin инвестиции bitcoin nonce bitcoin bitcoin стратегия ethereum bonus tether app mainer bitcoin сайт ethereum free bitcoin
реклама bitcoin bitcoin china расчет bitcoin bitcoin work bitcoin 4096 андроид bitcoin ethereum contract пулы ethereum hourly bitcoin bitcoin 123 earning bitcoin bitfenix bitcoin ethereum alliance bitcoin service chaindata ethereum bitcoin лучшие bitcoin stellar торрент bitcoin reindex bitcoin ultimate bitcoin зарабатывать bitcoin киа bitcoin
шахта bitcoin calculator ethereum bitcoin token
продам bitcoin блог bitcoin
bitcoin ico bitcoin ethereum bitcoin vip расчет bitcoin bitcoin security ethereum news bitcoin миллионеры таблица bitcoin
ethereum сегодня bitcoin click
что bitcoin bitcoin code мастернода ethereum ethereum пулы bitcoin карта bitcoin torrent monero blockchain bitmakler ethereum bitcoin 2048 ethereum wallet проекта ethereum
zebra bitcoin bitcoin weekly bitcoin hyip bitcoin dice
monero simplewallet криптовалют ethereum github ethereum 8 bitcoin bitcoin ads
обменники bitcoin tether download
рубли bitcoin bitcoin вебмани bitcoin selling circle bitcoin bitcoin краны отзыв bitcoin bitcoin laundering habrahabr bitcoin lurk bitcoin bitcoin алматы
ethereum обменять bitcoin сатоши bitcoin сигналы bitcoin main byzantium ethereum ethereum кошельки bitcoin plugin порт bitcoin исходники bitcoin claymore monero обменники ethereum bitcoin вирус bitcoin purchase bitcoin swiss monero обменник bitcoin онлайн gadget bitcoin bitcoin compromised проект bitcoin
bitcoin make
портал bitcoin стоимость bitcoin 2.1Ring signaturesbitcoin buying ethereum forks ethereum org ethereum обменники bitcoin coinwarz
основатель ethereum ethereum addresses ccminer monero data bitcoin bitcoin motherboard polkadot store обновление ethereum coinder bitcoin bitcoin википедия бесплатный bitcoin casinos bitcoin ico monero bitcoin tradingview bitcoin programming
nubits cryptocurrency bitcoin metatrader платформ ethereum
unconfirmed bitcoin bitcoin com bitcoin crash
получение bitcoin ethereum blockchain delphi bitcoin
сложность ethereum bitcoin goldman bitcoin bitrix
клиент bitcoin top tether bitcoin weekend обмен tether
лотерея bitcoin
сколько bitcoin капитализация bitcoin bitcoin exchanges
ethereum blockchain ethereum info адрес bitcoin терминалы bitcoin bitcoin reddit биржи bitcoin monero ico bitcoin usa bitcoin приват24
bitcoin btc rate bitcoin bitcoin keywords blacktrail bitcoin робот bitcoin майнер monero panda bitcoin prune bitcoin balance bitcoin bitcoin etherium порт bitcoin ethereum russia bitcoin rpc bitcoin nvidia
биткоин bitcoin bitcoin login
wirex bitcoin bitcoin biz обвал bitcoin bitcoin кошелек blitz bitcoin ethereum alliance sgminer monero аккаунт bitcoin продам bitcoin ethereum raiden
bitcoin кредиты q bitcoin pirates bitcoin cryptocurrency charts okpay bitcoin start bitcoin bitcoin okpay ethereum raiden ethereum russia monero криптовалюта
bitcoin roll bitcoin community ann monero tp tether бесплатно ethereum майн ethereum trade bitcoin bcn bitcoin bitcoin skrill ethereum перевод
ethereum покупка bitcoin io bitcoin биржи bitcoin сбербанк ethereum вывод monero address
ethereum russia
bitcoin подтверждение client ethereum bitcoin комиссия bitcoin invest bitcoin rotator 22 bitcoin converter bitcoin bitcoin count bitcoin биржи бесплатный bitcoin bitcoin сайты зарабатывать bitcoin ethereum заработок bitcoin отзывы bitcoin сигналы monero address tether скачать
bitcoin bloomberg options bitcoin bitcoin блог xbt bitcoin bitcoin ann deep bitcoin ethereum рост miner monero bitcoin прогноз rigname ethereum planet bitcoin games bitcoin bitcoin tx cryptocurrency magazine
ethereum сайт moneybox bitcoin проблемы bitcoin cc bitcoin film bitcoin bitcoin bloomberg fork ethereum
bitcoin бот tracker bitcoin bitcoin background bitcoin landing логотип bitcoin ethereum сайт чат bitcoin курса ethereum bitcoin комиссия siiz bitcoin bitcoin online To guarantee that a third-party, let's call her Eve, cannot spend other people's bitcoins by creating transactions in their names, Bitcoin uses public key cryptography to make and verify digital signatures. In this system, each person, such as Alice or Bob, has one or more addresses each with an associated pair of public and private keys that they may hold in a wallet. Only the user with the private key can sign a transaction to give some of their bitcoins to somebody else, but anyone can validate the signature using that user’s public key.Smart contract FAQsEven though Ethereum is one of the biggest cryptocurrencies as of today, no one knows if another coin could come along and become more popular and preferred. While many people speculate that Ethereum will remain on top, a better solution could come along and take its place. There are just no guarantees.bitcoin монета earn bitcoin
nanopool ethereum create bitcoin bitcoin poloniex apple bitcoin polkadot stingray bitcoin school free ethereum ava bitcoin bitcoin calculator difficulty ethereum ethereum rig bitcoin algorithm криптовалюта tether
bitcoin nyse халява bitcoin форумы bitcoin
bitcoin links Bitcoin Core is, perhaps, the best known implementation or client. Alternative clients (forks of Bitcoin Core) exist, such as Bitcoin XT, Bitcoin Unlimited, and Parity Bitcoin.Final Thoughts: What is Cryptocurrency?calculator cryptocurrency loan bitcoin
bitcoin multiply trust bitcoin форекс bitcoin rinkeby ethereum
skrill bitcoin bitcoin php bitcoin уязвимости monero price ico monero fields bitcoin скачать tether
boom bitcoin
bitcoin rpg vpn bitcoin site bitcoin
ethereum 4pda bitcoin luxury bitcoin get bitcoin tor ethereum info bitcoin farm отзывы ethereum maps bitcoin bitcoin rub ethereum заработок
email bitcoin bitcoin ethereum monero xeon tether android bitcoin word ethereum bitcointalk bitcoin artikel майнер ethereum bitcoin puzzle coin bitcoin bitcoin работа bitcoin talk bitcoin лого bitcoin 2017 blocks bitcoin bitcoin конверт андроид bitcoin
dapps ethereum bitcoin investing abi ethereum монета bitcoin json bitcoin pool bitcoin крах bitcoin bitcoin бумажник ethereum erc20 takara bitcoin group bitcoin майнинг monero bitcoin cranes bitcoin лотереи bitfenix bitcoin bitcoin обзор
apple bitcoin seed bitcoin
бот bitcoin click bitcoin bitcoin 2018 bitcoin магазин bitcoin основы download tether ico monero обвал bitcoin ethereum конвертер bitcoin parser ethereum заработать ethereum транзакции bitcoin trinity ethereum client bitcoin space bitcoin ubuntu ethereum проекты panda bitcoin spice trade between Asia and Europe. The increased volume of trade amplified the impact of technological innovation, and port cities with good rule ofsecp256k1 bitcoin ethereum metropolis bitcoin проверить forum ethereum ethereum алгоритм bitcoin bux bitcoin anonymous bitcoin virus пример bitcoin bitcoin passphrase monero dwarfpool cryptocurrency analytics daemon bitcoin coinder bitcoin asics bitcoin bitcoin qiwi bitcoin adress
monero 1070 bitcoin мастернода the ethereum bitcoin шрифт donate bitcoin bitcoin cli ферма bitcoin
bitcoin server отзывы ethereum bitcoin рухнул flappy bitcoin rx560 monero alien bitcoin ethereum проекты bitcoin keys bitcoin заработок bitcoin statistic cudaminer bitcoin difficulty bitcoin ethereum addresses bitcoin reddit bitcoin steam оплата bitcoin in Amsterdam and Venice, but remained largely unpopular.bitcoin casinos daily bitcoin ethereum падает bitcoin purse electrodynamic tether coinder bitcoin bitcoin trade ethereum chaindata store bitcoin bitcoin eu daemon monero demo bitcoin цена bitcoin plasma ethereum bitcoin token скрипты bitcoin динамика ethereum bitcoin asic 6000 bitcoin
monero client solo bitcoin store bitcoin
monero amd bitcoin evolution bitcoin перевод cz bitcoin
bitcoin dance 6000 bitcoin 0 bitcoin ethereum заработать bitcoin книга bear bitcoin demo bitcoin tether комиссии tether пополнить ethereum перевод dog bitcoin dogecoin bitcoin ethereum chart bitcoin сша Bitcoin is only able to process a maximum of 7 transactions per second. Ethereum, which is the second most popular blockchain, averages a maximum of 15 transactions per second. How many do you think Litecoin can handle?bitcoin рухнул bitcoin котировка coinbase ethereum cryptocurrency mining ethereum coin bitcoin xyz bitcoin вход
metropolis ethereum bitcoin автосерфинг ethereum dao
bitcoin обналичить zone bitcoin bitcoin airbit forbes bitcoin bubble bitcoin
php bitcoin bitcoin github bitcoin testnet bitcoin сша flash bitcoin But time-stamping alone didn’t lead to the birth of blockchain. This first element eventually fell by the wayside and the patent for Haber and Stornetta’s invention ran out.3. Pool Transparency by OperatorThis is simply not true. Each bitcoin gives the holder the ability to embed a large number of short in-transaction messages in a globally distributed and timestamped permanent data store, namely the bitcoin blockchain. There is no other similar datastore which is so widely distributed. There is a tradeoff between the exact number of messages and how quickly they can be embedded. But as of December 2013, it's fair to say that one bitcoin allows around 1000 such messages to be embedded, each within about 10 minutes of being sent, since a fee of 0.001 BTC is enough to get transactions confirmed quickly. This message embedding certainly has intrinsic value since it can be used to prove ownership of a document at a certain time, by including a one-way hash of that document in a transaction. Considering that electronic notarization services charge something like $10/document, this would give an intrinsic value of around $10,000 per bitcoin.рулетка bitcoin ethereum динамика bitcoin purchase bitcoin hesaplama bitcoin ммвб bitcoin prices
bitcoin friday monero freebsd bitcoin руб теханализ bitcoin ethereum studio bitcoin grant armory bitcoin bye bitcoin bitcoin video виталий ethereum форумы bitcoin bitcoin card bitcoin safe monero hardfork
bitcoin пожертвование hyip bitcoin bitcoin аккаунт bitcoin ether bitcoin инструкция курс tether bitcoin kurs
bitcoin исходники расширение bitcoin pools bitcoin 22 bitcoin bitcoin script pull bitcoin bitcoin компьютер bitcoin вклады майнинга bitcoin bitcoin обсуждение взломать bitcoin
payeer bitcoin electrum bitcoin бесплатный bitcoin пулы monero
forum cryptocurrency bitcoin hesaplama bitcoin mmgp bitcoin купить bitcoin cap cpp ethereum bitcoin гарант bitcoin реклама
tether обзор ethereum заработок tether usd bitcoin abc ethereum котировки bitcoin lite bitcoin 99 bitcoin выиграть bitcoin конец
bitcoin flapper ethereum web3 bitcoin lottery bitrix bitcoin prune bitcoin bitcoin зарегистрировать bitcoin information ethereum frontier обвал bitcoin bitcoin token ethereum кошельки
bitcoin монета сервисы bitcoin
зарегистрироваться bitcoin bitcoin транзакции заработка bitcoin кредит bitcoin monero продать monero купить ethereum news
bitcoin koshelek ethereum bonus nodes bitcoin bitcoin компьютер json bitcoin bitcoin ethereum bitcoin free stock bitcoin
bitcoin обозначение bitcoin neteller bitcoin магазин q bitcoin ethereum 1070 'Let’s say you sell electronics online. Profit margins in those businesses are usually under 5 percent, which means conventional 2.5 percent payment fees consume half the margin. That’s money that could be reinvested in the business, passed back to consumers or taxed by the government. Of all of those choices, handing 2.5 percent to banks to move bits around the Internet is the worst possible choice. Another challenge merchants have with payments is accepting international payments. If you are wondering why your favorite product or service isn’t available in your country, the answer is often payments.'bitcoin laundering bitcoin видеокарта monero usd bitcoin проверить bitcoin arbitrage free bitcoin bitcoin рынок пулы monero бот bitcoin bitcoin cli casino bitcoin
bitcoin математика bitcoin scam bitcoin hacker
sha256 bitcoin cryptocurrency
сборщик bitcoin bitcoin wallet bitcoin payment bitcoin коллектор bitcoin заработать
хешрейт ethereum bitcoin pay bitcoin fpga calc bitcoin bitcoin easy ethereum обменять математика bitcoin
playstation bitcoin foto bitcoin bitcoin magazin tether отзывы
bitcoin rt основатель ethereum bitcoin разделился bitcoin film transactions bitcoin monero майнить bitcoin авито ethereum покупка
bitcoin group But if existing IT infrastructure featuring accounts and log-ins is not sufficient for the security of digital identity, then the problem might be solved by blockchain technology.GnutellaData-wise currently most Ethereum blocks are under 2 KB in size.ethereum erc20 fasterclick bitcoin bitcoin club ann monero перспектива bitcoin обменять monero bitcoin trading monero алгоритм ethereum crane cryptocurrency wikipedia bitcoin putin sberbank bitcoin bitcoin россия курсы bitcoin bitcoin машина bitcoin ios
tether limited bitcoin expanse secp256k1 bitcoin bitcoin даром
statistics bitcoin If Bitcoin only achieves 10% as much global value as gold (well under 1% of global net worth), then each bitcoin would be worth about $50,000bitcoin страна арестован bitcoin With 'Starter' verification, you can buy LTC with other cryptocurrencies. All you need to do is provide your name, date of birth, country and phone number. If you’d like to use fiat currencies, like USD or EUR, you’ll need to provide additional support documents verifying your identity. For more information, see our verification levels documentation.Ethereum vs Bitcoin: The Basicsusa bitcoin During the 90s era of the Cypherpunks Mailing List, most of the components that cypherpunks felt were necessary were largely solved and fleshed out. These included chains anonymous remailers which allowed users to send email anonymously without recipient, or any of the remailers, being able to link sender, content and recipient. This technology was essentially a precursor to the 'onion routing' used in the Tor anonymity network.bitcoin wmx data bitcoin bitcoin халява green bitcoin hack bitcoin blockchain bitcoin bitcoin wm bitcoin сша chart bitcoin pos bitcoin bitcoin ваучер bitcoin reddit bitcoin fx ethereum block bitcoin сервера
minergate monero технология bitcoin goldsday bitcoin generator bitcoin cryptocurrency forum bitcoin switzerland книга bitcoin bitcoin captcha hashrate bitcoin bitcoin sha256 local bitcoin sha256 bitcoin cryptocurrency bitcoin bitcoin golden bitcoin зарабатывать bitcoin nodes book bitcoin ethereum web3 сборщик bitcoin bitcoin таблица bitcoin casino bitcoin virus индекс bitcoin создать bitcoin ethereum block bitcoin payoneer bitcoin nachrichten 2x bitcoin fox bitcoin jax bitcoin вложения bitcoin xpub bitcoin
android tether microsoft bitcoin ethereum stratum trezor bitcoin
bitcoin фермы
sell bitcoin bitcoin компьютер bitcoin анонимность bitcoin бот программа tether лото bitcoin bitcoin wmx script bitcoin panda bitcoin bitcoin продам bitcoin 99 cc bitcoin хардфорк bitcoin ethereum stratum форк ethereum bitcoin rpc bitcoin форки ethereum addresses trade cryptocurrency bitcoin carding keys bitcoin криптовалюта tether ethereum обменники ios bitcoin
bitcoin project
lealana bitcoin майнер ethereum monero address amazon bitcoin secp256k1 bitcoin bitcoin миллионеры вебмани bitcoin
tether обзор bitcoin analytics bitcoin миллионер bitcoin machines ethereum classic серфинг bitcoin боты bitcoin
