---
# System prepended metadata

title: Pre-settlement Working Group

---

# Pre-settlement Working Group Overview

Pre-settlement is a proposer commitment framework that enables Ethereum validators to delegate their based rollup sequencing rights to third parties. Its implementation, **LingLong**, functions as a PBS (Proposer-Builder Separation) platform for based rollups.

For more details, see [LingLong design doc](https://hackmd.io/@luban/By0YRV701e).



## Architecture

![image](https://hackmd.io/_uploads/rk8NPfkgee.png)



## Goals by Workstream

### 1. Delegation Models 
| Goal |Deliverable| Timeline|
| --- |---|---|
| Delegation interface for Linglong RGS via Linglong RVS | Contracts live on dev/testnet |Q2 2025 |
| Spec for general purpose delegation in extention to Based Rollup sequencing | Draft spec reviewed & published | Q2 2025 |
| CLI tool for validator delegation lifecycle management | Open source codebase | Q2 2025 |


### 2. Based Rollup Integration

| Goal |Deliverable| Timeline |
| --- |---| --- |
| **L1 Bridge contract & derivation rule** design leveraing Linglong | Draft spec reviewed & published | Q2 2025 |
| Gateway implementation leveraging Linglong  | Gateway live on devnet/testnet | Q2 2025 |
| Support for centralized sequencing model leveraging Linglong  | Contracts live on dev/testnet | Q2 2025 |
| Research report on **RGS** compatibility with 2 other sequencing models(half-based and fully-based) | Research report and/or spec reviewed & published| Q3 2025 |

### 3. Mechanism Research

| Goal |Deliverable| Timeline |
| --- |---| --- |
| **fault attribution** for Linglong RGS and RSV | Contracts live on dev/testnet | Q2 2025 |
| **slashing & rewards** design with quantitative and game-theoretic analysis | Research report reviewed & published | Q3 2025 |
| Research report on different **sequencing models** and their economic impact | Research report reviewed & published | Q3 2025 |

## Current Members
* **Node opeator**: Stakely, Hashkey Cloud, Meria
* **Rollup**: RISE
* **Security infra provider**: SSV, Mellow
* **LRT & Curator**: Gauntlet, cp0x
