# rollSlot

Description: rollSlot cheatcode documentation

Note: This document was authored using MDX

  Source: https://github.com/NomicFoundation/hardhat-website/tree/main/src/content/docs/docs/reference/cheatcodes/Environment/roll-slot.mdx

### Signature

```solidity
function rollSlot(uint64 newSlotNumber) external;
```

### Description

Sets `block.slotnum`, the consensus-layer slot number that [EIP-7843](https://eips.ethereum.org/EIPS/eip-7843) exposes through the `SLOTNUM` opcode. Unlike `roll` and `warp`, it doesn't change the block number or timestamp.

This cheatcode is only available from the [Amsterdam hardfork](/docs/reference/amsterdam-support#eip-7843-slotnum-opcode) onwards, and reverts on earlier hardforks.

### Examples

```solidity
uint256 blockNumber = block.number;
vm.rollSlot(100);
assertEq(vm.getSlotNumber(), 100);
assertEq(block.number, blockNumber); // unchanged
```

### SEE ALSO

- [getSlotNumber](/docs/reference/cheatcodes/environment/get-slot-number)
- [roll](/docs/reference/cheatcodes/environment/roll)