|Original author(s)||Vitalik Buterin, Gavin Wood|
|Initial release||July 30, 2015|
|Stable release||Muir Glacier / January 1, 2020|
|Software used||EVM 1 Bytecode|
|Written in||Go, Rust, C#, C++, Java, Python|
|Size||300 GB (2020-03)|
|License||Free software licenses|
|Total users||91,994,515 (2020-03)|
|Active hosts||7,546 (2020-03)|
Ethereum is a decentralized smart blockchain with smart contract and computer processing capabilities. The Ether (ETH) cryptocurrency rewarded to Ethereum blockchain miners is the second most valuable cryptocurrency by market capitalization as of 2020.
Ethereum provides a decentralized virtual machine, called the Ethereum Virtual Machine (EVM), that provides a turing-complete instruction set. Using the virtual machine requires "gas" payments in Ether (ETH) crypto-currency. The "gas" price is set by a internal transaction pricing mechanism.
ETH addresses consist of the prefix
0x followed by the rightmost 20 bytes of the Keccak-256 hash of the address owners ECDSA public key.
Differences from Bitcoin
- Ethereum has a block-time of only 13 seconds, making it very fast compared to Bitcoin's 10 minute block-time.
- Ethereum mining generates new ETH currency at a mostly constant and consistent rate. There is no block halving (Bitcoin mining rewards halve every 4 years).
- Ethereum uses a proof of work algorithm called Ethash. It is in theory ASIC-resistant.
- Transaction feeds (The "gas" price) depend on storage needs, computational complexity and bandwidth use. Bitcoin transactions are only dependent on the transaction size in bytes.