> ## 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.

# Overview

> Overview of the Beryl hardfork, introducing the B20 native token standard, reduced withdrawal delays, and Reth V2.

## Summary

* Introduce [B20](/base-chain/specs/upgrades/beryl/b20): Base's native token standard for stablecoin, real-world asset (RWA), and long-tail token issuers
* Reduce the single-proof withdrawal finalization period from 7 days to 5 days for increased capital efficiency
* Reth V2: up to 50% disk reduction and a rewritten state root pipeline delivering +33% throughput

## Activation Timestamps

| Network   | Timestamp    | Date                    |
| --------- | ------------ | ----------------------- |
| `mainnet` | `1782410400` | 2026-06-25 18:00:00 UTC |
| `sepolia` | `1781805600` | 2026-06-18 18:00:00 UTC |

## Required Software

| Layer          | Software         | Mainnet                                                     | Sepolia                                                     |
| -------------- | ---------------- | ----------------------------------------------------------- | ----------------------------------------------------------- |
| Execution (EL) | `base-reth-node` | [v1.1.1+](https://github.com/base/base/releases/tag/v1.1.1) | [v1.1.0+](https://github.com/base/base/releases/tag/v1.1.0) |
| Consensus (CL) | `base-consensus` | [v1.1.1+](https://github.com/base/base/releases/tag/v1.1.1) | [v1.1.0+](https://github.com/base/base/releases/tag/v1.1.0) |
| -              | `base/node`      | [v1.1.1+](https://github.com/base/node/releases/tag/v1.1.1) | [v1.1.0+](https://github.com/base/node/releases/tag/v1.1.0) |

<Warning>
  Action required before activation. Upgrade to the required version before each network's activation date above.
</Warning>

## B20: Native Token Standard

B20 is Base's native token standard - ERC-20 compatible tokens implemented as Rust precompiles, designed for stablecoin, real-world asset, and long-tail token issuers.

* [B20 Overview](/base-chain/specs/upgrades/beryl/b20)
* [Roles Model](/base-chain/specs/upgrades/beryl/b20#roles-model)
* [Policy Integration](/base-chain/specs/upgrades/beryl/b20#policy-integration)
* [Factory](/base-chain/specs/upgrades/beryl/b20#factory)
* [Policy Registry](/base-chain/specs/upgrades/beryl/b20#policy-registry)
* [Mint & Burn](/base-chain/specs/upgrades/beryl/b20#mint)
* [Variants](/base-chain/specs/upgrades/beryl/b20#variants)

## Withdrawals

The single-proof dispute game finalization window is reduced from 7 days to 5 days. The dual-proof fast path (TEE + ZK) introduced in Azul remains at 1 day.

Shortening the single-proof window frees capital for fast-bridge liquidity providers sooner, reducing fees and improving reliability for users who bridge through third-party partners.