Nebulas Technical Committee Meeting Minutes (2018.11.21)

Welcome to Nebulas Weekly Report #57, delivering the latest updates on the Nebulas project. This report is maintained by the Nebulas team. Please send feedback to, or tweet us @nebulasio.

Notes: To facilitate community members, Nebulas team has adjusted the weekly report, breaking it into community dynamics and development updates. The two parts will be alternately released on a weekly basis.

Nebulas Technical Committee (NTC) Meeting Minutes (2018.11.21)

The Nebulas Technical Committee (NTC) has decided to disclose the meeting minutes pertaining to the development of Nebulas NOVA in order to improve the transparency and openness of Nebulas. We welcome the community to explore the the meeting minutes via the Nebulas Wiki and to communicate with us via our mailing list.


1. The process to submit IR (LLVM Intermediate Representation) and who can submit IR (LLVM Intermediate Representation).
2. The time window for NR & DIP.
3. How much NAS for DIP & how to distribute NAS for DIP.

Detailed minutes:

  1. The process to submit IR and who can submit IR

(1) Nebulas Nova will use an auth_table to decide whose IR can be executed and the lifetime of each IR.

(2) auth_table is a set of tuples, and each tuple includes IR name, submitter’s address, the valid start and end height for the submitter.

(3) Only the auth_admin’s auth_table can update in Nebulas Nova. The auth_admin account should be created by a cold wallet. Each IR should be managed by different accounts. The Nebulas Technical Committee will further discuss the community governance details with the community. Before we finalized the governance details, the Nebulas team will not recklessly open the IR submission access. The NBRE only executes several predefined IRs, like checking the auth_table, and the IRs defined in auth_table. Other IRs will not be executed

(4) However, each node may change the code. And that could be the auth_admin account, and the auth_table. Consequently, it may change the behaviors in NBRE, and the node shall fail to sync data with the main-net.

2. The time window for NR &DIP

(1) In the yellow paper introducing Nebulas Rank, we mentioned that to avoid the affect of loop attack, we will remove the forwarding loop before we calculate the In-and-Out degree for the transaction graph, thus the time-window is important for anti-manipulation.

(2)If the time-window is too short, there may be more cheating.

(3)For now, we suggest the time window in several days.

(4)We should monitor the cheating status, and adjust the time-window if necessary.

(5)Time window for DIP should be much more larger than the time window of NR, for now, we suggests 7 days

3. How much NAS for DIP & how to distribute NAS for DIP

(1)For each month, we suggest around 500 NAS in total, the winners shall be relatively stable, so a winner will get reward in several months.

(2)We will have a special account for distributing NAS for DIP. The account can only send special transactions for DIP.

About Nebulas Technical Committee

The Nebulas Technical Committee adheres to the spirit of openness, sharing, and transparency, and is committed to promoting the decentralization, and the community of the research and development of the Nebulas technology. Blockchain technology opens up possibilities for building new and self-motivated open source communities. Nebulas’ technical concepts include mechanisms for evaluation, self-evolution, and self-incentives, which provide a guarantee for building a world of decentralized collaboration. The Nebulas Technical Committee will fully promote the realization of the Nebulas vision.

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Community Dynamics

Nebulas took part in the second Public Chain Technology Alliance (PCTA) Reddit AMA

PCTA held its second Reddit AMA on r/CryptoCurrency subreddit, discussing BCH hard fork. For more details, please click HERE to visit the AMA on Reddit.

Learn more:

Recap of PCTA Reddit AMA Series#2
Nebulas & XMAX Reddit AMA Recap#Part 1
Nebulas & XMAX Reddit AMA Recap#Part 2

Hitters Xu had conversation with internet celebrity Hong Yu

Recently, Nebulas was highlighted by Chinese billionaire and internet celebrity Hong Yu; publicly stating that “Nebulas is the Android of blockchain” and “Nebulas is one of the few trusted projects.”

Learn more:

Public Chain Technology — the future of blockchain?
Exploring the Public Chain Technology Alliance — Blockchain’s bridge from concept to creation!

Nebulas Research Institute in cooperation with Tsinghua University

Nebulas Research Institute cooperated with Tsinghua University with the problem of Mechanism Design issues, which could provide sustainable upgrading of benign Nebulas ecosystem.

Nebulas visiting scholar Dr. Zhang did an internal sharing with Nebulas team

Nebulas visiting scholar Dr. Zhang did a presentation with Nebulas team about the topic of “Cryptocurrency Price Manipulation”.

Learn more about Nebulas:

Official website:
Twitter: @nebulasio