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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →The Ethereum Virtual Machine (EVM) is Ethereum’s execution environment for smart-contract bytecode. It processes instructions within transaction and blockchain context, meters computation with gas, and determines resulting state changes under Ethereum’s protocol rules. It is not Solidity itself, nor a standalone app: it is part of how Ethereum nodes execute transactions and agree on the resulting state.
What the EVM does
Ethereum’s protocol defines how a transaction changes the blockchain’s state. When a transaction creates a contract or calls one, the EVM executes the relevant code as part of that state-transition process. Ethereum nodes applying the same protocol rules to the same inputs should reach the same execution result.
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Ethereum.org describes the EVM as a “decentralized virtual environment that executes code consistently and securely across all Ethereum nodes.” In practical terms, it supplies a common execution model: contract instructions are processed in a defined order, using the transaction and blockchain context available to them.
How smart-contract code reaches the EVM
- Write contract source code. Developers commonly use Solidity, a programming language designed for writing smart contracts.
- Compile it. A compiler translates source code into EVM bytecode—the instructions the EVM can execute. Solidity source code does not run directly on-chain.
- Create or call the contract. A contract-creation transaction installs code. A later message call can execute that code.
- Execute instructions and determine state changes. The EVM processes the bytecode within the call’s context. Depending on the instructions, execution can calculate values, inspect transaction or block information, call another contract, and read or change data.
Solidity’s documentation calls the EVM the runtime environment for Ethereum smart contracts. The distinction matters: Solidity is one way to write contract programs; the EVM is the execution environment that processes compiled bytecode.
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How the EVM handles computation and data
Gas bounds computation
Each operation consumes gas, which accounts for computation. If an execution call frame runs out of gas, it halts exceptionally and changes made in that frame are reverted. Gas is a measure of execution work, not a fixed transaction price. The fee paid depends on Ethereum’s fee rules and network conditions.
Stack and memory are temporary working areas
The EVM is a stack machine: instructions use a stack to hold and manipulate values while code runs. Ethereum.org documents a maximum stack depth of 1,024 items, with each item a 256-bit word. The EVM also has memory for temporary data; memory does not persist between transactions.
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Storage persists as contract state
Contract storage is part of Ethereum’s persistent state, unlike the temporary stack and memory used during execution. EVM transient storage, accessed with the TSTORE and TLOAD instructions, has a different lifetime: it can be used across internal calls during a transaction and is cleared when that transaction ends.
What the EVM is—and is not
- It is the execution environment for EVM bytecode and a component of Ethereum’s state-transition process.
- It is not the entire Ethereum network or a consumer application that users install and operate on its own.
- It is not a programming language. Solidity and other languages that target the EVM are used to write source code that is compiled into bytecode.
- It does not make every EVM-compatible chain identical. Compatibility concerns execution behavior, but chains can differ in supported protocol rules, transaction and fee systems, security assumptions, and governance.
Where to check exact EVM behavior
The EVM’s rules evolve as Ethereum upgrades its protocol, so details such as opcode behavior and gas costs can depend on the applicable fork. Ethereum’s Yellow Paper is a formal reference for the machine and its terminology. For current or fork-specific execution details, consult the maintained Ethereum Execution Layer Specification alongside the official Ethereum.org EVM explanation and Solidity introduction to smart contracts.
For deeper protocol terminology, see the Ethereum Yellow Paper. For a broader developer learning path, Ethereum.org maintains Ethereum development documentation.
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