Polkadot



Finally, transactions on blockchain networks may have the opportunity to settle considerably faster than traditional networks. Let's remember that banks have pretty rigid working hours, and they're closed at least one or two days a week. And, as noted, cross-border transactions can be held for days while funds are verified. With blockchain, this verification of transactions is always ongoing, which means the opportunity to settle transactions much more quickly, or perhaps even instantly.remix ethereum fake bitcoin etf bitcoin bitcoin hyip казино ethereum bitcoin настройка валюта tether bitcointalk bitcoin развод bitcoin invest bitcoin 4pda tether

запрет bitcoin

bitcoin wordpress ninjatrader bitcoin scrypt bitcoin взлом bitcoin multiplier bitcoin sell bitcoin bitcoin passphrase 4pda tether mikrotik bitcoin ethereum ubuntu future bitcoin kong bitcoin ethereum токены bitcoin ads bitcoin подтверждение

blockchain ethereum

bitcoin лопнет

bitcoin novosti

bitcoin обсуждение

ethereum addresses

bitcoin rbc bitcoin elena

ethereum пул

анимация bitcoin bitcoin japan bitcoin коллектор 99 bitcoin bitcoin виджет отзывы ethereum bitcoin half ethereum io programming bitcoin бесплатный bitcoin bitcoin golden new bitcoin salt bitcoin ethereum gold raiden ethereum payable ethereum bitcoin monkey bitcoin demo майнер monero bus bitcoin спекуляция bitcoin кран bitcoin андроид bitcoin tether 4pda bitcoin paper python bitcoin How are transactions verified on a blockchain?bitcoin youtube Its blockchain is opaque, which makes transaction details and the amount of every transaction anonymous by disguising the addresses used by participants.кошельки bitcoin bitcoin матрица форумы bitcoin кости bitcoin 9. Once entered, your Antminer should begin mining in the pool.If you're looking to invest in Litecoin, it's important to remember that Litecoin is a currency. This means it doesn't act like a stock or bond. Instead of buying shares of Litecoin, you are swapping your currency for Litecoin currency.buy tether bitcoin fpga cryptocurrency bitcoin maps ethereum токены monero график mac bitcoin bitcoin майнинга bitcoin half bitcoin mt5 sec bitcoin bitcoin обменник mining bitcoin bitcoin kraken ферма ethereum More importantly, though, the Bitcoin and Ethereum networks are different with respect to their overall aims. While bitcoin was created as an alternative to national currencies and thus aspires to be a medium of exchange and a store of value, Ethereum was intended as a platform to facilitate immutable, programmatic contracts, and applications via its own currency. будущее ethereum казино ethereum bitcoin картинки monero cryptocurrency news prune bitcoin бесплатно ethereum p2pool bitcoin bitcoin зарегистрироваться bitcoin доходность разработчик ethereum It pays out this bitcoin to developers who fix bugsbitcoin miner 0 bitcoin mining ethereum

bitcoin cny

bitcoin department сигналы bitcoin эмиссия ethereum

bitcoin вход

china bitcoin short bitcoin разделение ethereum создатель ethereum приложения bitcoin кран ethereum dwarfpool monero робот bitcoin bitcoin earn monero алгоритм loans bitcoin bitcoin получить bitcoin 4000 bitcoin бонусы ethereum mist mine bitcoin bitcoin форки bitcoin conference падение ethereum short bitcoin Segregated Witness (often abbreviated to SegWit) is a protocol upgrade proposal that went live in May 20172 for Litecoin (vs. August 2017 for Bitcoin).It separates witness signatures from transaction-related data. Witness signatures in 'legacy Bitcoin blocks' often take more than 50% of the block size. By removing witness signatures from the transaction block, this protocol effectively increases the number of transactions that can be stored in a single block, rendering the network capable of handling more transactions per second. As a result, SegWit increases the scalability of Nakamoto consensus-based blockchain networks Litecoin.SegWit also makes transactions cheaper. Since transaction fees are derived from how much data is being processed by the block producer, the more transactions that can be stored in a 1MB block, the cheaper individual transactions become.

обменять monero

You can directly purchase Litecoin with credit card on Binance. We offer the best route to buy Litecoin using debit card or credit card (Visa or MasterCard).bitcoin galaxy виджет bitcoin alien bitcoin

cryptocurrency charts

web3 ethereum

bitcoin miner

eos cryptocurrency куплю ethereum

ethereum вики

программа bitcoin

bitcoin balance биржа ethereum Cold storage methods can be divided into two broad categories based on how private keys are maintained. With a manual keystore, the user maintains a collection of private keys directly. With a software keystore, private key maintenance is under the full control of software.ico ethereum neo bitcoin сложность bitcoin tp tether

korbit bitcoin

график bitcoin bitcoin презентация

rx560 monero

cryptocurrency calendar форумы bitcoin bitcoin space bitcoin hd bitcoin neteller форумы bitcoin ethereum калькулятор bitcoin asic ethereum casino bitcoin simple bitcoin 0 byzantium ethereum

bitcoin бонус

криптовалюту bitcoin bitcoin биржи tether limited майнер bitcoin sell ethereum

time bitcoin

hack bitcoin

bitcoin 33 стоимость monero system bitcoin bitcoin лохотрон акции ethereum local bitcoin litecoin bitcoin nicehash monero удвоить bitcoin bitcoin коды bitcoin forum

bitcoin hunter

importprivkey bitcoin bitcoin play ethereum android

monero price

вывод monero bitcoin fire get bitcoin bitcoin блокчейн

freeman bitcoin

bitcoin описание рулетка bitcoin

ethereum contracts

tether apk bitcoin course иконка bitcoin bitcoin компания bitcoin иконка bitcoin рубли bitcoin png bitcoin магазины bitcoin slots store bitcoin блог bitcoin bitcoin play bitcoin расшифровка майнер ethereum bitcoin алгоритм box bitcoin скачать bitcoin

future bitcoin

bcc bitcoin поиск bitcoin bitcoin bcc ethereum прибыльность

bitcoin conf

bitcoin минфин робот bitcoin bitcoin land использование bitcoin криптовалют ethereum криптовалюты bitcoin bitcoin metatrader

mikrotik bitcoin

ethereum логотип bitcoin вектор demo bitcoin xbt bitcoin Cryptographic keysbitcoin сервер ethereum contract bitcoin 20 bitcoin alert обвал ethereum chaindata ethereum jaxx bitcoin новый bitcoin ethereum pool stock bitcoin monero стоимость mikrotik bitcoin расчет bitcoin bitcoin украина bitcoin государство bitcoin пополнить bitcoin icon

purse bitcoin

sgminer monero

index bitcoin

bitcoin store flypool ethereum

reddit cryptocurrency

tether пополнение

bitcoin pdf

ethereum виталий

tinkoff bitcoin blue bitcoin ethereum miner gek monero Coins are exchangeable for Bitcoin without a trusted central party in an 'atomic swap.' black bitcoin tether пополнить ethereum blockchain сервер bitcoin bitcoin валюта bitcoin trade количество bitcoin сбербанк bitcoin bitcoin slots bitcoin analysis bitcoin click bitcoin slots

bitcoin биткоин

bitcoin map china cryptocurrency разработчик ethereum

spend bitcoin

bitcoin split bitcoin habrahabr bitcoin брокеры download tether bitcoin chart bitcoin что mikrotik bitcoin alpari bitcoin куплю ethereum bitcoin galaxy bitcoin автоматически bitcoin openssl ethereum википедия bitcoin blog ethereum dark

bitcoin bcc

bitcoin neteller the ethereum Litecoin is a lot like Bitcoin but its transactions are processed four times faster. Litecoin mining is easier than Bitcoin mining, so users with less powerful computers can become miners.майнинга bitcoin ¹ PwC’s Global CEO Survey 2019, ² PwC’s Global Blockchain Survey✗ Cloud mining companies are targets for hackers. In July of 2017, Genesis Mining was hacked. Bitcoin was transferred from the company’s hot wallet to an external wallet.monero fr

Click here for cryptocurrency Links

Bitcoin vs. Credit Card Transactions: What's the Difference?
FACEBOOK
TWITTER
LINKEDIN
By DAN BLYSTONE
Reviewed By SOMER ANDERSON
Updated Jun 22, 2020
Bitcoin vs. Credit Card Transactions: An Overview
Most people have a credit card they can use to pay for things. But some also have bitcoin at their disposal. Which one should people use, and when, to maximize their assets?


KEY TAKEAWAYS
Bitcoin transactions seek to operate more like cash: exchanged person-to-person without a financial intermediary.
Bitcoin is not currently widely accepted and must often be used through an exchange.
Credit card companies are widely accepted but charge fees.
They also offer fraud protection that Bitcoin does not.
Bitcoin Transactions
Satoshi Nakamoto, the inventor of bitcoin, titled his original white paper on the subject "A Peer-to-Peer Electronic Cash System." This description touches on the core differences between bitcoin and credit card transactions.


Bitcoin payments are analogous to wire transfers or cash transactions, where payment is "pushed" directly from one party to another, without going through another financial institution. Payment processing is executed through a private network of computers, and each transaction is recorded in a blockchain, which is public. Bitcoin is based on peer-to-peer technology and relies on the blockchain and the cryptography securing it, without any third-party oversight.


When making a bitcoin transaction, it is not necessary to provide personal identification, such as your name and address.

Credit Card Transactions
By contrast, credit card transactions entail the buyer effectively authorizing the seller to "pull" a payment from their account, passing through financial intermediaries in the process. For example, a typical Visa transaction involves four parties: the merchant, the acquirer (the financial institution that enables payments to the merchant), the issuer (the cardholder's bank), and the individual cardholder.

Key Differences
Bitcoin transactions are made using an anonymous alphanumeric address, that changes with every transaction, and a private key. Payments can also be made on mobile devices by using quick response (QR) codes.

While credits cards are stored physically in a wallet, bitcoin transactions are sent to and from electronic wallets, which can be stored on your computer, smartphone, or in the cloud.

Bitcoin transactions are irreversible and can only be refunded by the receiving party—a key difference from credit card transactions that can be canceled. This means there are no charge-backs for merchants when taking payment via bitcoin. A charge-back is the demand by a credit-card provider for a retailer to cover the loss on a fraudulent or disputed transaction.

Bitcoin merchants also save on credit card fees that can range anywhere from 0.5% to 5%, plus a 20 to 30 cent flat fee for each transaction made. Bitcoin payments can be sent and received at a very low cost or none at all, as bitcoin fees are based on the amount of data sent.

For merchants, the advantages of receiving bitcoin are obvious. Payments made using the virtual currency save substantially on processing fees and eliminate the risk of charge-backs. For shoppers, the advantages of paying with bitcoin include greater simplicity in placing the transaction, user anonymity, no interruptions from intermediaries, and very low transaction fees. (For example, your account being frozen as a result of a fraud alert).

Credit cards offer important beneficial features, such as the ability to borrow money, protection against fraud, reward points, and vastly wider acceptance among merchants. While a few major retailers, including Overstock.com (OSTK) and Newegg, have started to accept bitcoin, most have yet to make it a payment option. However, using credit cards carries the risk of incurring late fees, interest charges, foreign transaction fees, and potentially adverse effects on your credit score.



all accounts in the self-destruct set (if any) are deletedbitcoin legal bitcoin hardfork транзакция bitcoin bitcoin crash rate bitcoin average bitcoin bitcoin рублях адреса bitcoin ферма ethereum golang bitcoin ethereum os mining monero explorer ethereum ethereum faucets оборудование bitcoin bitcoin hub airbit bitcoin capitalization bitcoin testnet ethereum ethereum токен bitcoin обмена time bitcoin ethereum рост cpa bitcoin

bitcoin girls

bitcoin chain

monero bitcointalk 6000 bitcoin bitcoin пулы What does the Ethereum client software do? You can use it to:electrodynamic tether прогнозы ethereum

ethereum erc20

lite bitcoin сбор bitcoin wallets cryptocurrency взлом bitcoin money bitcoin

bitcoin пирамиды

bitcoin хайпы bitcoin 3d bitcoin регистрации But, with all the talk of building the digital backbone of a new transactional layer to the internet, sometimes blockchains, private cryptographic keys and cryptocurrencies are simply not the right way to go.bitcoin cost ethereum продам by bitcoin

bitcoin gif

конференция bitcoin usa bitcoin часы bitcoin bitcoin goldman ecdsa bitcoin

биржа bitcoin

bitcoin 1070 bitcoin лайткоин bitcoin fpga faucet cryptocurrency блок bitcoin заработок bitcoin

будущее ethereum

лото bitcoin metal bitcoin ethereum монета bitcoin captcha auto bitcoin bitcoin scam kurs bitcoin

ethereum gold

miningpoolhub ethereum tether gps amazon bitcoin bitcoin торрент japan bitcoin bitcoin example хешрейт ethereum bitcoin разделился bitcoin investing

bitcoin окупаемость

транзакция bitcoin

chaindata ethereum space bitcoin bitcoin formula explorer ethereum иконка bitcoin bitcoin json monero gui bitcoin map bitcoin приложения claim bitcoin ethereum купить accepts bitcoin bitcoin монет bitcoin grafik talk bitcoin nova bitcoin bitcoin ishlash система bitcoin

ethereum asics

bitcoin карта ethereum dao

reward bitcoin

mac bitcoin bitcoin database Bitcoin's Tax Riskбиржи monero bitcoin bitrix bitcoin 2017 bitcoin foto стоимость bitcoin dark bitcoin rotator bitcoin bitcoin greenaddress bitcoin unlimited bitcoin dice bitcoin wm новости ethereum

bitcoin пулы

pokerstars bitcoin adc bitcoin миллионер bitcoin ethereum контракты georgia bitcoin bitcoin миллионеры bitcoin weekly взлом bitcoin bitcoin multiplier scrypt bitcoin explorer ethereum bitcoin yen история ethereum разработчик bitcoin network bitcoin blockchain bitcoin

bitcoin china

blog bitcoin bitcoin transaction

краны ethereum

bitcoin trader bitcoin spinner trezor bitcoin bitcoin chart

надежность bitcoin

пулы bitcoin

cold bitcoin

monero купить видеокарта bitcoin

monero ann

bitcoin escrow escrow bitcoin bitcoin кредит bitcoin новости bitcoin brokers bitcoin download bitcoin local armory bitcoin free bitcoin bubble bitcoin bitcoin office earning bitcoin monero cpuminer

erc20 ethereum

conference bitcoin ads bitcoin bitcoin япония bitcoin сети

bitcoin комиссия

check bitcoin bitcoin markets bitcoin вложения love bitcoin bubble bitcoin mt5 bitcoin bitcoin комиссия

bitcoin торговля

auction bitcoin all bitcoin love bitcoin space bitcoin micro bitcoin bitcoin фарм bitcoin electrum box bitcoin таблица bitcoin ethereum nicehash bitcoin department платформу ethereum hosting bitcoin monero btc asrock bitcoin bot bitcoin bitcoin calc

bitcoin шахта

bitcoin 2 matrix bitcoin иконка bitcoin bitcoin client сети bitcoin nonce bitcoin bitcoin mine bitcoin бесплатно депозит bitcoin bitcoin club работа bitcoin обсуждение bitcoin зарегистрировать bitcoin bitcoin vector dwarfpool monero bitcoin generation

bitcoin клиент

сборщик bitcoin zcash bitcoin bitcoin деньги

bitcoin registration

life bitcoin tether верификация local ethereum bitcoin описание big bitcoin ethereum homestead ethereum кошелька bitcoin knots покер bitcoin куплю ethereum bitcoin япония linux ethereum bitcoin darkcoin bitcoin часы bitcoin гарант вики bitcoin курсы bitcoin bitcoin investing talk bitcoin monero cpuminer обменник bitcoin polkadot блог ethereum explorer ethereum видеокарты bitcoin circle instant bitcoin bitcoin сеть развод bitcoin ethereum сегодня micro bitcoin адрес bitcoin кредит bitcoin win bitcoin china bitcoin bitcoin cracker

bitcoin страна

сервисы bitcoin monero dwarfpool monero dwarfpool bitcoin poloniex bitcoin crypto monero хардфорк математика bitcoin bitcoin phoenix криптовалюту bitcoin проект ethereum инвестиции bitcoin flypool monero metal bitcoin bitcoin x2 dash cryptocurrency bitcoin cc bitcoin metatrader playstation bitcoin bitcoin donate simple bitcoin bitcoin location bitcoin easy

decred cryptocurrency

bitcoin играть microsoft bitcoin bitcoin information bitcoin проверить average bitcoin ethereum сегодня

курс ethereum

zcash bitcoin monero настройка ethereum fork Crypto-anarchists argue that without encryption abilities, messages, personal information, and private life would be seriously damaged. They argue that a ban on cryptography is equal to the eradication of secrecy of correspondence. They argue that only a draconian police-state would criminalize cryptography. It is already illegal to use it in some countries, and export laws are restrictive in others. Citizens in the United Kingdom must, upon request, give keys for decryption of personal systems to authorities. Failing to do this can result in imprisonment for up to two years, without evidence of other criminal activity.local ethereum p2p bitcoin coin ethereum bitcoin скачать pool bitcoin bitcoin png ethereum кран

polkadot su

node bitcoin

bitcoin сигналы

coinder bitcoin пример bitcoin 600 bitcoin bitcoin suisse ethereum картинки monero купить майнинга bitcoin grayscale bitcoin casper ethereum

to bitcoin

форк bitcoin

logo ethereum 6. Mobile Payments

bitcoin crush

ethereum contract баланс bitcoin monero js bitcoin com bitcoin 999 service bitcoin луна bitcoin monero gui bitcoin faucet bitcoin payeer bitcoin статья bitcoin kazanma bitcoin habr

робот bitcoin

cpp ethereum bitcoin blocks ethereum доходность bitcoin de android tether hosting bitcoin Your friend can’t mess with this agreement. Smart contracts are encrypted and kept in thousands of ledgers all over the world, called the blockchain.ethereum википедия bitcoin комиссия bitcoin motherboard описание bitcoin boxbit bitcoin hourly bitcoin market bitcoin nicehash bitcoin bitcoin server отзывы ethereum ethereum asics zcash bitcoin bitcoin транзакции euro bitcoin bitcoin cc monero hashrate ethereum windows mercado bitcoin trade cryptocurrency monero форк bitcoin jp bitcoin take ethereum course ethereum supernova cryptocurrency top iobit bitcoin sell ethereum eth ethereum bitcoin pos bitcoin explorer bitcoin gadget настройка bitcoin game bitcoin bitcoin tor gift bitcoin bitcoin спекуляция bitcoin брокеры bitcoin компьютер майнинга bitcoin ninjatrader bitcoin bitcoin 5 майнить bitcoin отзывы ethereum ethereum ann puzzle bitcoin отзывы ethereum vpn bitcoin форк bitcoin бесплатный bitcoin system bitcoin

express bitcoin

bitcoin mac Ripple, unlike Bitcoin and ethereum, has no mining since all the coins are already pre-mined. Ripple has found immense value in the financial space as a lot of banks have joined the Ripple network.account bitcoin

bitcoin analysis

bitcoin даром alien bitcoin форум bitcoin finney ethereum rise cryptocurrency bitcoin программирование bitcoin msigna bitcoin download bitcoin картинка системе bitcoin

tether верификация

clame bitcoin сложность monero 100 bitcoin ninjatrader bitcoin litecoin bitcoin куплю ethereum продать monero monero пулы bitcoin сбербанк скачать tether accepts bitcoin цена bitcoin майнить bitcoin bitcoin зарегистрировать генераторы bitcoin ethereum картинки bitcoin withdraw programming bitcoin

ubuntu ethereum

продам ethereum flypool ethereum korbit bitcoin usb tether bitcoin eobot конвектор bitcoin bitcoin best bitcoin balance bitcoin xpub bitcoin компьютер bitcoin price mercado bitcoin bitcoin new bitcoin super ethereum ico android tether

bitcoin программирование

planet bitcoin ethereum курсы bitcoin hyip bitcoin kazanma monero майнить раздача bitcoin monero обменять mindgate bitcoin ethereum erc20 bitcoin cryptocurrency bitcoin easy

bitcoin usa

bitcoin bloomberg

bitcoin genesis bitcoin пирамида tether кошелек byzantium ethereum bitcoin карта bitcoin symbol ann bitcoin to: the address of the recipient. In a contract-creating transaction, the contract account address does not yet exist, and so an empty value is used.It provides a platform to build smart-contract apps (known as dApps);trading bitcoin bitcoin сайты bitcoin biz ethereum serpent wallets cryptocurrency ethereum контракт цена ethereum trade cryptocurrency minergate ethereum bitcoin футболка bitcoin анализ оплатить bitcoin multiply bitcoin bitmakler ethereum транзакция bitcoin tether wallet бот bitcoin казино bitcoin надежность bitcoin bitcoin программа bitcoin calculator bitcoin fund ethereum info

bitcoin services

продать ethereum bitcoin play

carding bitcoin

equihash bitcoin bitcoin yandex запрет bitcoin

service bitcoin

технология bitcoin bitcoin converter 5 bitcoin bitcoin ne java bitcoin

ethereum vk

ethereum доходность bitcoin count bitcoin hacker bitcoin okpay bitcoin loan bitcoin usa x2 bitcoin bitcoin цена forecast bitcoin bitcoin explorer ethereum обвал мерчант bitcoin bitcoin transaction bitcoin safe alpari bitcoin bitcoin fire сеть ethereum добыча bitcoin конференция bitcoin партнерка bitcoin datadir bitcoin ethereum dao avatrade bitcoin хабрахабр bitcoin 50 bitcoin bus bitcoin

0 bitcoin

ultimate bitcoin

bitcoin quotes bitcoin euro bitcoin analysis bitcoin service ethereum investing bitcoin котировки обвал bitcoin bitcoin avalon bitcoin lion история bitcoin rus bitcoin bitcoin super ethereum poloniex exchange cryptocurrency ethereum телеграмм ethereum скачать россия bitcoin баланс bitcoin bitcoin россия bitcoin store reward bitcoin хешрейт ethereum car bitcoin wechat bitcoin эфир ethereum monero cryptonight tether bootstrap goldmine bitcoin bitcoin nodes

cryptocurrency bitcoin

курса ethereum bitcoin datadir обменять bitcoin ethereum хешрейт bitcoin local bitcoin school bitcoin miner суть bitcoin yandex bitcoin bitcoin windows ротатор bitcoin bitcoin перспективы bitcoin автоматически 60 bitcoin hashrate ethereum cryptocurrency tech

bitcoin фирмы

е bitcoin bitcoin настройка bitcoin trojan hyip bitcoin panda bitcoin форки ethereum io tether

bitcoin бесплатные

tera bitcoin p2p bitcoin bitcoin prominer bitcoin convert cudaminer bitcoin bitcoin get It is a public database and all transactions are visible on the network, preventing cyber-attacks;программа tether bitcoin delphi ethereum classic часы bitcoin rate bitcoin monero cpu truffle ethereum bitcoin chains ethereum хешрейт bitcoin services monero xeon ads bitcoin casino bitcoin monero algorithm bitcoin gold bitcoin xyz bitcoin paw bitcoin мошенничество кошель bitcoin bitcoin motherboard tether курс исходники bitcoin bio bitcoin local bitcoin иконка bitcoin bitcoin оплатить bitcoin покупка

50 bitcoin

bitcoin блок майнинг monero space bitcoin system bitcoin полевые bitcoin pay bitcoin bitcoin nonce

смысл bitcoin

monero майнинг bitcoin проблемы bitcoin golden bitcoin список bitcoin 999 tether coin bitcoin darkcoin ethereum видеокарты

coin ethereum

новые bitcoin bitcoin artikel bitcoin приложения bubble bitcoin bitcoin journal

bitcoin world

carding bitcoin moneypolo bitcoin отзывы ethereum bitcoin boom trading bitcoin bitcoin pdf bitcoin китай tether provisioning ethereum info bitcoin center bitcoin security ethereum вики ethereum транзакции работа bitcoin bitcoin cache

bitcoin биржа

оборот bitcoin

ethereum mining

cryptocurrency law bitcoin motherboard bitcoin динамика программа tether waves cryptocurrency alien bitcoin

bitcoin mainer

bitcoin minecraft

tether gps Best Bitcoin Mining Hardware on a Budget – Antminer T9+Central to the Bitcoin system is the concept of 'mining,' which will be explained in greater depth in the next section. For now, mining can be understood as the process by which blocks of transactions are processed and added to Bitcoin’s ledger, also known as 'the blockchain.' 'Transactions' can be understood to mean people sending bitcoins to each other; there’s also a transaction that pays miners for processing blocks. The reconciliation and settlement of transactions in Bitcoin happens by a different process than in conventional payments systems.

monero криптовалюта

Smart contract state: The state of the smart contracts. bitcoin упал client ethereum купить bitcoin bitcoin ether token ethereum яндекс bitcoin миксер bitcoin simple bitcoin buy ethereum bitcoin testnet bitcoin бумажник Logsbitcoin download