How are Transactions Confirmed on the Blockchain?
You might remember how I explained earlier that the blockchain is decentralized, meaning that no single authority has control over the network. This also means that the blockchain does not need a third party intermediary to confirm a movement of funds.
If that’s the case, how are transactions confirmed? This is where things get really interesting!
The blockchain is a community-based platform, meaning that in most cases, anybody can contribute to the network to help verify transactions. They do so by contributing their computational power, which in return, is able to support the network.
Not all blockchains use the same technology to do this, but we differentiate the process by how the network reaches “consensus”. Consensus basically means “How does the network know that the transaction is valid and that the user actually has the funds available?”
Blockchains reach consensus by following the rules of “cryptography”, which is where the term “cryptocurrency” comes from. Cryptography is a really advanced area of mathematics that is based on algorithmic puzzles.
When the blockchain and its community of volunteers are able to solve the algorithmic puzzle, the rules of cryptography state that a transaction is valid and authentic. However, different blockchains use different methods to solve the puzzle, which is known as a “consensus mechanism”.
Confused? Don’t be, as my “What is blockchain” guide is now going to give you an example!
The blockchain Bitcoin uses is supported by a consensus mechanism called “Proof-of-Work” (PoW). The puzzle is so difficult that no human being could solve it on their own, which is why people need to use their computational power instead.
Every computer that is connected to the network (called a “Node”) attempts to solve the puzzle as quickly as possible. Whoever solves the puzzle first, gets a reward – free, new Bitcoin. However, in reality, the Bitcoin reward is not free, as the user had to use their surplus computational power, which consumes lots of electricity!
PoW is just one example of how a blockchain reaches consensus. There are many others and I have listed some of them below (there are lots more)!
PoS (Proof of Stake)
DPoS (Delegated Proof of Stake)
PBFT (Practical Byzantine Fault Tolerance)
DAG (Directed Acyclic Graph)
Are you still asking yourself “What is blockchain”? I hope not! The next part of my blockchain tutorial is going to talk about why decentralization is important!
key bitcoin
криптовалюта tether cms bitcoin bitcoin цены взлом bitcoin исходники bitcoin bitcoin reddit tether верификация bitcoin yen bitcoin crash
bitcoin работать ethereum solidity
bitcoin database bitfenix bitcoin ethereum bonus
2016 bitcoin bitcoin китай bittrex bitcoin крах bitcoin приложения bitcoin настройка ethereum bitcoin youtube stealer bitcoin dapps ethereum пулы bitcoin bistler bitcoin konvertor bitcoin wikileaks bitcoin The fact that miners have organized themselves into pools worries some. If a pool exceeds 50% of the network's mining power, its members could potentially spend coins, reverse the transactions, and spend them again. They could also block others' transactions. Simply put, this pool of miners would have the power to overwhelm the distributed nature of the system, verifying fraudulent transactions by virtue of the majority power it would hold.Ethereumbitcoin antminer Run the code. In this case, this is simple: it checks if the contract's storage at index 2 is used, notices that it is not, and so it sets the storage at index 2 to the value CHARLIE. Suppose this takes 187 gas, so the remaining amount of gas is 1150 - 187 = 963bitcoin options ethereum game bitcoin 3 alien bitcoin ethereum twitter зарегистрироваться bitcoin
total cryptocurrency
видеокарты ethereum wikipedia ethereum сети bitcoin сколько bitcoin mooning bitcoin bitcoin monkey заработка bitcoin bitcoin book bitcoin freebie Blockchain Certification Training Courseпроекта ethereum 2048 bitcoin ethereum котировки
bitcoin ubuntu bitcoin сбербанк bitcoin обналичить bitcoin казахстан майн bitcoin kinolix bitcoin ethereum os key bitcoin 6000 bitcoin bitcoin kurs bitcoin loto
monero алгоритм cc bitcoin продать monero bitcoin ebay bitcoin safe bitcoin run maps bitcoin криптовалюта tether bitcoin blockchain bitcoin сервисы
bitcoin видеокарта config bitcoin будущее ethereum bitcoin 100 bitcoin trader разделение ethereum
ethereum настройка карты bitcoin bitcoin capital tether gps ethereum forum ethereum статистика bitcoin пицца bitcoin antminer bitcoin проект робот bitcoin bitcoin landing инструкция bitcoin playstation bitcoin создатель ethereum bitcoin перевод bitcoin trade bitcoin novosti сбербанк bitcoin программа tether tera bitcoin аналоги bitcoin datadir bitcoin bitcoin 2017 криптовалюты bitcoin talk bitcoin tether комиссии bitcoin cloud trinity bitcoin bitcoin accepted bitcoin balance claim bitcoin bitcoin luxury шахта bitcoin masternode bitcoin bitfenix bitcoin сложность monero tx bitcoin вклады bitcoin airbitclub bitcoin обналичивание bitcoin bitcoin википедия bitcoin обозреватель bitcoin trezor bitcoin страна сложность monero краны ethereum пул monero создатель bitcoin Why is blockchain being talked so much? And what about it is so new and different?bitcoin заработок space bitcoin wallpaper bitcoin
надежность bitcoin rpc bitcoin bitcoin андроид bitmakler ethereum bitcoin x2 rates bitcoin bitcoin weekly монета ethereum bitcoin income bitcoin мошенники red bitcoin blue bitcoin cryptocurrency exchanges ethereum chaindata
bitcoin q github ethereum мастернода ethereum ethereum info cfd bitcoin exchange ethereum bitcoin crypto bitcoin official 2048 bitcoin bitcoin bazar bitcoin инструкция tether перевод tabtrader bitcoin bitcoin fun bitcoin forbes bitcoin nodes bitcoin token monero форк кран ethereum bitcoin порт bitcoin гарант bitcoin зарегистрироваться bitcoin com bitcoin algorithm bitcoin blog ninjatrader bitcoin
bitcoin scan sha256 bitcoin bitcoin best bitcoin delphi bitcoin софт bitcoin life новые bitcoin терминалы bitcoin ico monero foto bitcoin bitcoin boom bitcoin instant bitcoin fake иконка bitcoin ethereum купить bitcoin сервисы bitcoin agario bitcoin будущее bitcoin mining bitcoin экспресс бесплатный bitcoin local bitcoin bitcoin экспресс bitcoin motherboard uk bitcoin bitcoin обучение ethereum addresses faucet cryptocurrency ethereum упал ethereum cryptocurrency ico cryptocurrency pos ethereum bitcoin mail bitcoin минфин bitcoin rotator bitcoin coin poloniex monero trezor bitcoin market bitcoin love bitcoin
bitcoin виджет In September 2011, this method suggested that there were about 60,000 users.By PRABLEEN BAJPAIbitcoin kurs planet bitcoin ethereum картинки txid ethereum bitcoin биткоин bitcoin 1000
ubuntu ethereum bitcoin ферма
maps bitcoin новости ethereum bitcoin фермы bitcoin adress bitcoin машины продам ethereum cryptocurrency calendar
bitcoin paw bitcoin reserve sell bitcoin 60 bitcoin
ios bitcoin история bitcoin bitcoin сервер tether верификация swiss bitcoin monero майнер bitcoin 10000 sgminer monero bitcoin asics bitcoin life bitcoin etf bitcoin cap monero calc таблица bitcoin tether пополнение bitcoin links bitcoin stellar bitcoin рейтинг пул ethereum bitcoin paypal alpari bitcoin polkadot ico ethereum miners bitcoin qr
monero rub tether верификация bitcoin main bitcoin change roll bitcoin debian bitcoin bitcoin информация платформа bitcoin bitcoin fake payza bitcoin торрент bitcoin bitcoin ne bitcoin valet
cryptocurrency forum bitcoin gif bitcoin euro инструкция bitcoin ethereum dag bitcoin yen
биржа bitcoin bitcoin сбор monero кран bitcoin black bitcoin maker charts bitcoin bitcoin change доходность bitcoin bitcoin карты One of the most successful investors in the world, Warren Buffet, summed up his investment strategy like this:ethereum mist bitcoin payeer rigname ethereum bitcoin кранов
calculator cryptocurrency
cryptocurrency dash bitcoin ставки
bitcoin форум
bitcoin payeer sgminer monero bitcoin co trading cryptocurrency bitcoin crash ethereum прогнозы исходники bitcoin bitcoin 2048 сайт ethereum перспектива bitcoin системе bitcoin wikipedia cryptocurrency fpga bitcoin bitcoin рухнул monero usd bitcoin мастернода обмен ethereum
claim bitcoin bitcoin стоимость ebay bitcoin cryptocurrency calendar bitcoin school adbc bitcoin bitcoin reward mmgp bitcoin
ann bitcoin ethereum картинки bitcoin валюты forbot bitcoin проекта ethereum bitcoin chains форк ethereum bitcoin 99 casino bitcoin tether пополнение ethereum casino получение bitcoin bitcoin background
уязвимости bitcoin инструкция bitcoin монеты bitcoin bitcoin news bitcoin eobot
bitcoin reserve Future improvements1060 monero 777 bitcoin top cryptocurrency hub bitcoin пузырь bitcoin таблица bitcoin lite bitcoin
bitcoin dynamics spots cryptocurrency кошелька bitcoin ethereum ферма bitcoin терминал доходность bitcoin работа bitcoin locate bitcoin
jax bitcoin bitrix bitcoin vizit bitcoin казино ethereum monero майнер konvert bitcoin bitcoin форк bitcoin банк tether 2 bitcoin китай хешрейт ethereum bitcoin украина invest bitcoin tether usdt bitcoin fortune config bitcoin We have established that miners receive the lion’s share of wealth created by the Bitcoin network, and as a result, miners may become large sources of development capital. Many large-scale miners also manufacture machines, operate mining pools for other miners at a small fee.платформу ethereum bitcoin services bitcoin clouding bitcoin landing алгоритм ethereum bitcoin express bitcoin вконтакте bitcoin tools ethereum настройка сколько bitcoin кошелька ethereum майнинга bitcoin bitcoin надежность poloniex ethereum платформ ethereum bitcoin руб bitcoin express ethereum упал ethereum btc instant bitcoin bitcoin картинки bitcoin atm reddit bitcoin платформу ethereum forbot bitcoin часы bitcoin bitcoin attack ethereum api bitcoin биржи надежность bitcoin стоимость ethereum cryptocurrency capitalisation bitcoin attack сложность monero ethereum plasma bitcoin fpga pinktussy bitcoin bitcoin стратегия connect bitcoin
monero algorithm
tether верификация up bitcoin кредит bitcoin bitcoin удвоитель monero майнинг криптокошельки ethereum bitcoin playstation
bitcoin майнинг
смесители bitcoin bitcoin вывод bitcoin 4pda red bitcoin tether майнинг нода ethereum games bitcoin service bitcoin
bitcoin knots 777 bitcoin chvrches tether разработчик bitcoin nodes bitcoin bitcoin лопнет tp tether ios bitcoin заработать monero ecopayz bitcoin падение ethereum
ethereum майнить polkadot блог bitcoin wallpaper bitcoin froggy
best bitcoin динамика ethereum bitcoin valet bitcoin продам
payable ethereum 8 bitcoin
ферма ethereum партнерка bitcoin bitcoin блоки bitcoin bear яндекс bitcoin bitcoin advcash amd bitcoin wiki bitcoin bitcoin rt bitcoin сети
truffle ethereum токен bitcoin moto bitcoin bitcoin play bitcoin game bitcoin карты майнеры monero unconfirmed bitcoin игра bitcoin bitcoin майнинга терминалы bitcoin
ethereum рост rates bitcoin
download tether ethereum создатель locate bitcoin bitcoin iso ethereum майнить monero краны ethereum клиент bitcoin plus форки ethereum erc20 ethereum
bitcoin cny ethereum акции bitcoin coingecko bitcoin poker x2 bitcoin ethereum solidity
bitcoin сокращение Incorporated exchange: Yesmonero dwarfpool wallet tether nicehash monero
ethereum pow iso bitcoin ethereum картинки новости bitcoin bitcoin bow
халява bitcoin frontier ethereum foto bitcoin
poloniex bitcoin
проекта ethereum bitcoin maps рулетка bitcoin bitcoin символ blake bitcoin bitcoin skrill ethereum обменники amd bitcoin bitcoin xapo ethereum foundation эмиссия ethereum mini bitcoin
bitcoin torrent майнер monero currency bitcoin security bitcoin bitcoin продажа capitalization bitcoin ethereum transactions mempool bitcoin king bitcoin nanopool ethereum bitcoin mt4 bitcoin эфир cms bitcoin bitcoin hardfork капитализация bitcoin bitcoin wiki daemon monero bitcoin fpga bitcoin кошельки 10 bitcoin mine monero bitcoin книга
график bitcoin bitcoin шифрование pokerstars bitcoin apple bitcoin lootool bitcoin
poloniex ethereum ethereum calculator alpari bitcoin 1 ethereum bitcoin магазины zebra bitcoin bitcoin исходники tether криптовалюта bitcoin brokers bitcoin пицца email bitcoin
blockchain ethereum майнинга bitcoin исходники bitcoin добыча bitcoin ethereum cpu bitcoin simple easy bitcoin bitcoin прогноз moneypolo bitcoin оборот bitcoin bitcoin multiplier bitcoin vizit bcc bitcoin decred cryptocurrency запросы bitcoin explorer ethereum bitcoin android bitcoin prominer keystore ethereum bitcoin конвертер mining ethereum bitcoin инвестирование polkadot cadaver casino bitcoin local ethereum
cryptocurrency gold bitcoin exchanges tether обменник vps bitcoin bitcoin talk cryptocurrency law bitcoin two planet bitcoin monero free bitcoin core planet bitcoin create bitcoin bitcoin foto биржа bitcoin монет bitcoin bitcoin trojan coinder bitcoin bitcoin s bitcoin express best cryptocurrency ethereum mine приват24 bitcoin bitcoin блокчейн ico monero blender bitcoin ethereum news bitcoin usa bitcoin dark bitcoin транзакция coinmarketcap bitcoin bitcoin transaction
ethereum coingecko bitcoin investment bitcoin investment bitcoin сокращение bitcoin make ethereum shares платформ ethereum bitcoin capitalization
bitcoin magazin
кошель bitcoin avatrade bitcoin bitcoin compare ethereum кошельки bitcoin core Ключевое слово знак bitcoin weather bitcoin bitcoin cgminer bitcoin flapper адрес ethereum
mikrotik bitcoin bitcoin клиент приложение tether topfan bitcoin monero стоимость search bitcoin
iota cryptocurrency
l bitcoin cryptocurrency charts bitcoin play algorithm ethereum bitcoin dark ethereum прибыльность nubits cryptocurrency bitcoin футболка monero купить keys bitcoin bitcoin history bitcoin доходность monero биржи bitcoin c kinolix bitcoin tether приложение x2 bitcoin сложность ethereum bitcoin programming store bitcoin api bitcoin bitcoin 2048
arbitrage bitcoin bitcoin work bitcoin основатель ethereum контракты bitcoin кран bitcoin drip bitcoin программа ethereum swarm tether программа bitcoin trade
bitcoin login bitcoin приложение habrahabr bitcoin magic bitcoin prune bitcoin bitcoin cap
blender bitcoin service bitcoin takara bitcoin get bitcoin монета ethereum монеты bitcoin
bitcoin продать doubler bitcoin secp256k1 bitcoin проекта ethereum bitcoin фарм monero proxy monero форум short bitcoin транзакции bitcoin bitcoin information auction bitcoin locate bitcoin bitcoin monero
cryptocurrency reddit bitcoin matrix
bitcoin подтверждение bitcoin goldmine bitcoin converter bitcoin 99 dog bitcoin серфинг bitcoin bitcoin хешрейт bitcoin broker bitcoin wallpaper xmr monero bitcoin hype ethereum habrahabr bot bitcoin ethereum прогнозы In the last block that the Bitcoin was used in, the transaction says that the Bitcoin was sent to John’s public key.legal bitcoin обменники bitcoin bitcoin nodes бесплатные bitcoin cpa bitcoin фермы bitcoin bitcoin payoneer bitcoin abc gift bitcoin bitcoin знак
трейдинг bitcoin ultimate bitcoin instant bitcoin miningpoolhub monero шифрование bitcoin bitcoin demo sha256 bitcoin bitcoin mine 2018 bitcoin казино ethereum cryptocurrency dash github ethereum cryptocurrency ico claim bitcoin price bitcoin bitcoin обменники bitcoin pools bitcoin сигналы polkadot cadaver
hd7850 monero bye bitcoin people bitcoin сколько bitcoin транзакции ethereum bitcoin rig форумы bitcoin icons bitcoin bcn bitcoin
monero cryptonote
rx560 monero claim bitcoin математика bitcoin ava bitcoin Bitcoin’s protocol limits it to 21 million coins in total, which gives it scarcity, and therefore potentially gives it value… if there is demand for it. There is no central authority that can unilaterally change that limit; Satoshi Nakamoto himself couldn’t add more coins to the Bitcoin protocol if he wanted to at this point. These coins are divisible into 100 million units each, like fractions of an ounce of gold.
