## Cheatcodes Reference

Cheatcodes give you powerful assertions, the ability to alter the state of the EVM, mock data, and more.

Cheatcodes are made available through use of the cheatcode address (`0x7109709ECfa91a80626fF3989D68f67F5b1DD12D`).

:::tip[Finding Cheatcodes]
Use the sidebar to browse cheatcodes by category, or press `Ctrl+K` / `Cmd+K` to search for a specific cheatcode.
:::

:::note
If you encounter errors for this address when using fuzzed addresses in your tests, you may wish to
exclude it from your fuzz tests by using the following line:

```solidity
 vm.assume(address_ != 0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);
```
:::

You can also access cheatcodes easily via `vm` available in Forge Standard Library's [`Test`](/reference/forge-std/overview) contract.

### Cheatcode Categories

<Cards>
  <Card title="Environment" description="Manipulate the EVM state: block timestamp, number, msg.sender, storage, balances, and more." to="/reference/cheatcodes/warp" />

  <Card title="Assertions" description="Expect reverts, events, and calls in your tests." to="/reference/cheatcodes/expect-revert" />

  <Card title="Fuzzer" description="Control fuzzer behavior with assumptions and constraints." to="/reference/cheatcodes/assume" />

  <Card title="Forking" description="Create and manage forks of live networks." to="/reference/cheatcodes/create-fork" />

  <Card title="External" description="Interact with the outside world: run commands, read environment variables, parse JSON/TOML." to="/reference/cheatcodes/ffi" />

  <Card title="Signing" description="Sign messages and EIP-7702 delegations." to="/reference/cheatcodes/sign" />

  <Card title="Utilities" description="Helper functions for addresses, labels, parsing, and wallets." to="/reference/cheatcodes/addr" />

  <Card title="Files" description="Read and write files from your tests and scripts." to="/reference/cheatcodes/fs" />

  <Card title="RPC" description="Register and interact with RPC endpoints." to="/reference/cheatcodes/rpc" />

  <Card title="State Snapshots" description="Snapshot and restore EVM state." to="/reference/cheatcodes/state-snapshots" />
</Cards>

### Forge Standard Library

Forge Std implements wrappers around cheatcodes, which combine multiple standard cheatcodes to improve development experience. See [Std Cheats](/reference/forge-std/std-cheats) for more details.

### Contributing

If you need a new cheatcode, consider [contributing to the Foundry codebase](https://github.com/foundry-rs/foundry).

### Cheatcodes Interface

The complete Solidity interface for all cheatcodes is available in the [forge-std repository](https://github.com/foundry-rs/forge-std/blob/master/src/Vm.sol).