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| Mainnet (Ethereum) | |
|---|---|
| Name | Ethereum Mainnet |
| Developer | Vitalik Buterin, Gavin Wood, Ethereum Foundation |
| Released | 2015-07-30 |
| Latest release | Merge (2022) |
| Consensus | Proof of Stake |
| Programming language | Solidity (programming language), Vyper (programming language) |
| Website | Ethereum.org |
Mainnet (Ethereum) The Ethereum mainnet is the public, permissionless blockchain that runs the Ethereum Virtual Machine and hosts the native cryptocurrency Ether (cryptocurrency), global decentralized applications, and token standards. It serves as the production layer for projects such as Uniswap, MakerDAO, OpenSea, and Gnosis Safe, enabling programmable value transfer, composability, and decentralized finance across a broad developer and user base. The mainnet’s operation has been shaped by protocols, governance decisions, and landmark events involving actors like the Ethereum Foundation, Consensys, and prominent researchers.
Ethereum mainnet provides a live settlement and execution environment for smart contracts implemented in languages such as Solidity (programming language), interacting with wallets like MetaMask, Ledger (hardware wallet), and Trezor. It implements token standards like ERC-20, ERC-721, and ERC-1155, supporting ecosystems including DeFi, non-fungible token marketplaces, and decentralized autonomous organizations such as Aragon. Nodes communicate via peers in networks using protocols developed by teams such as Prysmatic Labs, Lighthouse (software), and Besu (software), with clients maintained by organizations including Nethermind and Geth (software). The mainnet’s address space, transaction format, and gas metering are defined in protocol specifications coordinated through Ethereum Improvement Proposal processes.
Ethereum mainnet launched in 2015 after the Ethereum (crowdsale) and development by co-founders like Vitalik Buterin and Gavin Wood, following test networks including Olympic (testnet), Morden (testnet), and Ropsten (testnet). Early milestones included the Homestead (Ethereum) upgrade and the emergence of decentralized exchanges such as EtherDelta and lending protocols influenced by actors like Compound (protocol). The platform’s growth accelerated through events and crises involving projects like The DAO (organization) which precipitated a contentious hard fork and divergence with Ethereum Classic, drawing attention from institutions including the SEC (U.S. Securities and Exchange Commission). Subsequent community governance, development roadmaps, and research from groups like Ethereum Foundation and P2P Foundation guided protocol evolution.
Mainnet originally used a Proof-of-Work algorithm called Ethash with miners operating using hardware from manufacturers like NVIDIA and AMD, organized in mining pools such as Ethermine and SparkPool. Following the coordinated transition known as the Merge (Ethereum) the consensus layer migrated to Proof of Stake with validators running clients produced by teams including Prysmatic Labs, Teku (software), and Lighthouse (software). The architecture separates an execution layer (previously the mainnet execution engine) and a consensus layer (formerly Ethereum 2.0 Beacon Chain), with synchronization, gossip protocols, and state transition rules defined in specifications contributed by entities like EF Research and academic collaborators such as Juan Benet and Justin Drake. Transaction inclusion, gas metering, and fee mechanisms involve EIPs including EIP-1559, while sharding research and data-availability proposals reference efforts by teams like Proto-Danksharding proponents.
Mainnet upgrades occur via hard forks and network-wide EIP adoption, with historical forks including Homestead (Ethereum), Byzantium (Ethereum), Constantinople, Istanbul (Ethereum), and post-Merge enhancements branded as The Surge, The Verge, The Purge, and The Splurge in roadmap discussions. Notable protocol changes include EIP-1559 for base fee burning, EIP-4844 (Proto-Danksharding) for blob-carrying transactions, and consensus transitions from Ethash to the Beacon Chain PoS design. Implementation teams such as Geth (software), Nethermind, Besu (software), and Erigon coordinate client releases, often after testnet deployments on networks like Goerli (testnet) and Sepolia (testnet) and audits by firms including Trail of Bits and OpenZeppelin.
The mainnet underpins decentralized finance projects such as Uniswap (protocol), Aave, MakerDAO, and Compound (protocol), NFT platforms like OpenSea and Rarible, and infrastructure services including Infura, Alchemy (company), and The Graph. It supports cross-chain bridges like Polygon Bridge, layer-2 rollups from teams such as Optimism (company) and Arbitrum, and custody solutions by Coinbase (company) and Kraken (company). Enterprises and consortia such as Enterprise Ethereum Alliance and researchers at institutions like MIT and UC Berkeley have prototyped use cases spanning tokenization, decentralized identity with projects like ENS (Ethereum Name Service), and DAO governance exemplified by MakerDAO and Compound governance.
Security incidents on mainnet include the 2016 exploit of The DAO (organization) leading to the hard fork and the separate chain Ethereum Classic, hacks affecting protocols like Mt. Gox (contextual industry event), and smart contract breaches such as incidents with bZx and Compound (protocol) integrations. Responses have involved emergency forks, multi-party governance decisions by entities like the Ethereum Foundation and defense by auditing firms including Consensys Diligence and OpenZeppelin. Ongoing security work includes formal verification research from teams at ChainSecurity and Runtime Verification, and bounty programs run by exchanges like Binance (company) and Coinbase (company).
Mainnet metrics tracked by analytics platforms like Etherscan, Dune Analytics, and Glassnode include block time, transaction throughput, gas usage, and validator counts following the Merge. Economic mechanisms include the native currency Ether (cryptocurrency), staking rewards to validators managed via the Beacon Chain, transaction fee burning from EIP-1559, and supply dynamics influenced by network demand observed in events like DeFi Summer (2020) and NFT market cycles. Market participants include centralized exchanges such as Binance (company) and Coinbase (company), institutional investors, and retail users interacting through wallets like MetaMask and custodial providers like Anchorage (company).