Execution Client
Web3 / infrastructure applications
An execution client is software that manages the computational layer of a blockchain network, responsible for processing transactions, executing smart contracts within the EVM, and maintaining the current state of all accounts and balances. Following Ethereum's transition to proof-of-stake in the Merge, execution clients work in conjunction with consensus clients to validate blocks and secure the network. Popular execution clients include Geth, Erigon, and Besu, each with different optimizations for storage, synchronization speed, and resource consumption. Example: Geth, developed by the Ethereum Foundation, is the most widely used execution client. It handles transaction validation and smart contract execution for the majority of Ethereum nodes, storing the blockchain state and allowing users to query account balances and contract data. Why it matters for blockchain infrastructure: Execution clients are critical infrastructure that enables the functionality of smart contract platforms. Their efficiency, stability, and diversity are essential for network decentralization, preventing single points of failure, and ensuring that running a node remains accessible to participants with varying computational resources.
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