EVM Component
The EVM (Ethereum Virtual Machine) component handles transaction execution and state transitions. It's responsible for processing transactions and updating the blockchain state.
Overview
The EVM component manages:
- Transaction execution
- State transitions and updates
- Gas calculation and metering
- Custom precompiles and opcodes
- Block execution and validation
- State management and caching
Architecture
Key Concepts
Transaction Execution
The EVM executes transactions in a deterministic way:
- Environment Setup: Configure block and transaction context
- State Access: Load accounts and storage from the database
- Execution: Run EVM bytecode with gas metering
- State Updates: Apply changes to accounts and storage
- Receipt Generation: Create execution receipts with logs
Block Execution
Block executors process all transactions in a block:
- Validate pre-state conditions
- Execute transactions sequentially
- Apply block rewards
- Verify post-state (state root, receipts root)
Block Building
Block builders construct new blocks for proposal:
- Select transactions (e.g. mempool)
- Order and execute transactions
- Seal the block with a header (state root)
Next Steps
- Learn about RPC server integration
- Explore Transaction Pool interaction
- Review Consensus validation