EVM (Ethereum Virtual Machine)

How the EVM Works

The EVM is a stack-based virtual machine that executes bytecode compiled from high-level languages like Solidity or Vyper. When a smart contract is deployed, its bytecode is stored on the blockchain at a specific address. When a user interacts with that contract — calling a function to swap tokens, add liquidity, or transfer an NFT — the EVM executes the relevant bytecode instructions on every node in the network.

Each operation in the EVM has a defined gas cost. Simple operations like addition cost 3 gas, while storage operations cost 20,000 gas or more. This gas metering prevents infinite loops and ensures that computational resources are priced according to actual usage. The total gas consumed by a transaction multiplied by the gas price determines the transaction fee paid to validators.

EVM compatibility means that any blockchain implementing the same bytecode specification can run Ethereum smart contracts without modification. This has led to a proliferation of EVM-compatible chains including BNB Chain, Polygon, Avalanche, Arbitrum, and Base, all sharing the same developer tooling and contract standards.

Why the EVM Matters

The EVM established the standard for programmable blockchains. Its widespread adoption means developers can write a smart contract once and deploy it on dozens of networks, and users can interact with DeFi protocols across multiple chains using the same wallet and familiar interfaces. This composability is why EVM chains collectively host the majority of DeFi total value locked.

For traders, EVM compatibility means that DEX interfaces, token standards, and trading tools work consistently across chains. A token contract following the ERC-20 standard on Ethereum behaves identically on Arbitrum or Base. OpenLiquid's tools support EVM-compatible chains, allowing users to execute strategies across multiple networks with consistent contract interactions.

Real-World Example

When a trader executes a token swap on Uniswap deployed on Arbitrum, the EVM processes the swap function call by executing the router contract's bytecode. The EVM reads the current pool reserves from storage, calculates the output amount based on the constant product formula, transfers tokens between the pool and the trader's wallet, and updates storage with the new reserve balances. Every Arbitrum node runs this identical computation to verify the result. The same Uniswap contract code runs on Ethereum, Polygon, Base, and other EVM chains with no modification needed.