> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Granite

> Overview of the Granite hardfork, adding bn256Pairing precompile input size restrictions and CHANNEL_TIMEOUT parameter changes.

## Activation Timestamps

| Network   | Activation timestamp                   |
| --------- | -------------------------------------- |
| `mainnet` | `1726070401` (2024-09-11 16:00:01 UTC) |
| `sepolia` | `1723478400` (2024-08-12 16:00:00 UTC) |

## Execution Layer

* [Limit `bn256Pairing` precompile input size](/base-chain/specs/upgrades/granite/exec-engine#bn256pairing-precompile-input-restriction)

## Consensus Layer

* [Reduce Channel Timeout to 50](/base-chain/specs/upgrades/granite/derivation#reduce-channel-timeout)