> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-docs-specs-tab.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Beryl makes Base a first-class issuance platform with B20 tokens, more capital efficient with reduced withdrawal delays, and more scalable with Reth V2.

# Beryl

Beryl makes Base a first-class issuance platform with B20 tokens, more capital efficient with reduced withdrawal delays, and more scalable with Reth V2.

|         | Status | Date          |
| ------- | ------ | ------------- |
| Sepolia | Live   | June 18, 2026 |
| Mainnet | Live   | June 25, 2026 |

## Features

<Card title="Reth V2" href="/base-chain/specs/upgrades/beryl/reth-v2">
  Ships Reth V2 as the reference execution client for Base nodes, delivering significant sync speed and throughput improvements.
</Card>

<Card title="Faster Withdrawals" href="/base-chain/specs/upgrades/beryl/reducing-canonical-withdrawal-delay">
  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.
</Card>

<Card title="B20" href="/base-chain/specs/b20/overview">
  B20 implements the ERC-20 specification, making it interoperable with all existing systems built on ERC-20 like wallets, exchanges, data indexers, and onchain protocols. What's different is how it runs. Rather than deploying a Solidity contract, B20 tokens execute as Rust precompiles inside the node.
</Card>