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Introduction

Overview Installation Getting Started

Projects

Creating a New Project Clone a Verified Contract Dependencies Soldeer Project Layout

Forge

Tests

Overview Writing Tests Cheatcodes Forge Standard Library Overview Understanding Traces Fork Testing Replaying Failures

Advanced Testing

Overview Fuzz Testing Invariant Testing Differential Testing

Deploying and Verifying

Gas Tracking

Overview Gas Reports Gas Function Snapshots Gas Section Snapshots

Reference

Cast

Anvil

Overview Reference

Chisel

Overview Reference

Configuration

Overview Dynamic Test Linking Continuous Integration Integrating with VSCode Shell Autocompletion Static Analyzers Integrating with Hardhat Vyper support Forge lint

Best Practices Scripting with Solidity Deterministic deployments using CREATE2 Forking Mainnet with Cast and Anvil Running Foundry inside of Docker Video tutorials

Cheatcode Reference

warp roll fee getBlockTimestamp getBlockNumber difficulty prevrandao chainId store load etch deal prank startPrank stopPrank readCallers record accesses recordLogs getRecordedLogs setNonce getNonce mockCall mockCalls mockCallRevert mockFunction clearMockedCalls coinbase broadcast startBroadcast stopBroadcast pauseGasMetering resetGasMetering resumeGasMetering txGasPrice startStateDiffRecording stopAndReturnStateDiff snapshotState snapshotGas isContext

Forge-Std Reference

DSTest Reference

Miscellaneous

Announcements v1.0 migration guide Struct Encoding FAQ

`fee`

Signature

function fee(uint256) external;

Description

Sets block.basefee.

Examples

vm.fee(25 gwei);
emit log_uint(block.basefee); // 25000000000