# expectSafeMemoryCall

Description: expectSafeMemoryCall cheatcode documentation

Note: This document was authored using MDX

  Source: https://github.com/NomicFoundation/hardhat-website/tree/main/src/content/docs/docs/reference/cheatcodes/Assertions/expect-safe-memory-call.mdx

### Signature

```solidity
function expectSafeMemoryCall(uint64 min, uint64 max) external;
```

### Description

Only allows memory writes to offsets [0x00, 0x60) ∪ [min, max) in the next created subcontext.
If any other memory is written to, the test will fail. Can be called multiple times to add more ranges
to the set.