Hello!

We will hold the documentation workgroup call this Friday, both Western and Eastern hemispheres.   Thanks to everyone who attended last week's call.

The summary minutes for last week's meeting: https://wiki.hyperledger.org/display/fabric/Meetings

You can read all about the call at https://wiki.hyperledger.org/display/fabric/2020+02+07+DWG+Agenda It included a V2 status update from Pam and Joe, a review of our new Chinese language docs, an overview of the new style guide from Joe, and the new deployment guide.

Specifically, we'd would like to express our thanks to Rich Zhao and his team on the release of the Chinese language docs - a great piece of work! You can check them out: https://hyperledger-fabric.readthedocs.io/zh_CN/release-1.4/

All-in-all, a great session last week. You can catch up via the recording: https://wiki.hyperledger.org/display/fabric/Recordings

You'll see that there are lots of interesting items for this week: https://wiki.hyperledger.org/display/fabric/2020+02+14+DWG+Agenda
Please feel free to contribute using the wiki, including helping to build next week's agenda: https://wiki.hyperledger.org/display/fabric/2020+02+21+DWG+Agenda

Thanks!

Pam, Anthony,  Joe, Nik

Meeting Details
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Please use the following link to attend the meeting:  https://zoom.us/j/6223336701

The meeting times are as follows: https://wiki.hyperledger.org/display/fabric/Documentation+Working+Group

Meeting 115A: Friday 14 Feb
                   1130 India Standard Time
                   1400 China Standard Time
                   1500 Japan Standard Time
                   1700 Australia Eastern Time
                   1400 Singapore Time
                   1000 Gulf Standard Time
                   0900 Moscow Standard Time
                   0600 Greenwich Mean Time
                   0700 Central European Time    

Meeting 115B: Friday 14 Feb
              1100 Central Daylight Time
                   1200 Eastern Daylight Time
                   0900 Pacific Daylight Time
                   1400 Brasil Time (BRT)
                   1700 Greenwich Mean Time
                   1800 Central European Time
                   1900 Moscow Standard Tim


Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number 741598.
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

Reminder: Hyperledger Fabric Documentation Workgroup call - Eastern hemisphere

When: Friday, 14 February 2020, 6:00am to 7:00am, (GMT+00:00) Europe/London

Where:https://zoom.us/j/6223336701

View Event

Organizer: Anthony O'Dowd a_o-dowd@... +441962816761

Description: Documentation workgroup call.
Agenda, minutes and recordings: https://wiki.hyperledger.org/display/fabric/Documentation+Working+Group

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Martin

A transaction that uses collections leaks information about the involved parties in 3 ways: 1) the creator; 2) the collection name and 3) endorsements. Point 1 can be addressed by using idemix. Local collections address point 2, and we have a (VERY ROUGH!) prototype here

https://github.com/IBM/fabric/blob/release-2.0/docs/source/local_collections.md

We're working on point 3, so take a look at our playground https://github.com/IBM/fabric/ for updates.

Cheers,
Ale

The pattern mentioned in 'Keeping transactors private' would meet the requirement of keeping the collaborators of a business transaction private in Fabric v2.0. In this pattern, each party writes common pre-image data, or a reference to each other's pre-image data, in their own private data collection that their own peer endorses. The pre-image data can later be shared as needed with other organizations, who can verify the hashes on the chain. If required in your scenario, you could also provide a third party such as a regulator access to the data so that they could verify both sets of hashes in chaincode and then 'settle' the business level transaction with a final Fabric transaction.

Concerning your specific question, I am aware of ongoing research to make either local collections proper, or private peer-to-peer transaction flows, available in a future version of Fabric. However, there is no specific plan or RFC available at this time.


Dave Enyeart

westerkamp---02/12/2020 04:50:16 AM---Hi everyone, Some time ago there has been a discussion concerning local collections with the goal to

From: westerkamp@...
To: fabric@...
Date: 02/12/2020 04:50 AM
Subject: [EXTERNAL] [Hyperledger Fabric] Local Collections in Fabric 2.0 #fabric
Sent by: fabric@...

---

Hi everyone,

Some time ago there has been a discussion concerning local collections with the goal to obscure members of a collection to other participants of a channel in FAB-7593.

I was wondering about the impact of novel Fabric 2.0 features on the proposal or if Fabric 2.0 delivers functionality that enables such collections already? In that context, I have checked out the private data sharing patterns descibed here. Especially the "Keeping transactors private" pattern seems very related.

I would like to introduce a short example to clearify the requirements: Four organizations A, B, C and D participate in a shared channel. A and B collaborate using chaincode containing a private data collection. C and D should not be able to observe that A and B are collaborating. Therefore, when A is submitting a transaction, C and D should not be able to tell who is affected by that transaction. Currently, the data collection definition reveals all members of the collections, so that C and D can derive that A and B are collaborating (from my understanding).

So my questions are:
- Can Fabric 2.0 already implement such a use can, e.g. by applying the "Keeping transactors private" pattern? If so, what would it look like in detail?
- If it cannot be implemented by Fabric 2.0 yet, what do we need to do so? Is FAB-7593 still relevant in context of Fabric 2.0?

Thanks and best regards,
Martin

Hi everyone,

Some time ago there has been a discussion concerning local collections with the goal to obscure members of a collection to other participants of a channel in FAB-7593.

I was wondering about the impact of novel Fabric 2.0 features on the proposal or if Fabric 2.0 delivers functionality that enables such collections already? In that context, I have checked out the private data sharing patterns descibed here. Especially the "Keeping transactors private" pattern seems very related.

I would like to introduce a short example to clearify the requirements: Four organizations A, B, C and D participate in a shared channel. A and B collaborate using chaincode containing a private data collection. C and D should not be able to observe that A and B are collaborating. Therefore, when A is submitting a transaction, C and D should not be able to tell who is affected by that transaction. Currently, the data collection definition reveals all members of the collections, so that C and D can derive that A and B are collaborating (from my understanding).

So my questions are:
- Can Fabric 2.0 already implement such a use can, e.g. by applying the "Keeping transactors private" pattern? If so, what would it look like in detail?
- If it cannot be implemented by Fabric 2.0 yet, what do we need to do so? Is FAB-7593 still relevant in context of Fabric 2.0?

Thanks and best regards,
Martin

Hello Hyperledger Community,

Less than four weeks to go until Hyperledger Global Forum 2020! I am so excited to see not only long time friends but all the new people, projects, deployments, and energy in our community. We've grown so much even just since the last Forum in Basel just over a year ago. This time no one needs to bundle up in scarves and mittens, as Arizona in springtime is gorgeous.

As digitally connected as our community is, in-person meetings like this are essential to developing a healthy Open Source software community. Community itself is an inherent part of blockchain technology - our ledger platforms are operating systems for cooperative networks. Whether you're a developer or product manager or business-level decision-maker, if you want to better understand the full scope of what everyone in the Hyperledger Greenhouse are building and deploying, and where the enterprise blockchain movement is going, you want to be here!

I wanted to make sure that you do not miss out on standard pricing, which ends on February 18. Save up to $400 if you register by the deadline. Hotel rooms will most likely sell out in advance - I encourage you to book ASAP to secure a room at the conference rate, which was just extended through Friday, Feb 14.

At Global Forum, you will have the chance to talk directly with Hyperledger project maintainers and the Technical Steering Committee, collaborate with other developers and executives on ideas that will directly impact the future of Hyperledger. Plus you get to promote your work among the enterprise blockchain community.

This year’s agenda will feature more than 80 sessions, including dozens of breakout sessions plus panels, workshops and a Demo Theater. You can search the agenda and also browse by filter type including industry, project focus. There’s some really great technical sessions/workshops lined up that I would like to highlight:

Going into Production! Performance Best Practices in Hyperledger Fabric - Alfonso De la Rocha Gómez-Arevalillo, Telefónica

Hyperledger Fabric is getting traction in the corporate world, with more and more companies deploying Fabric-based projects and PoCs. One of the main limitations Telefonica’s found is getting a PoC into production because of a lack of performance best practices. In this talk Alfonso will answer common performance questions such as: What configurations should I fine-tune to get the most out of my infrastructure? And How many peers, endorsers and ordering nodes do I need?

Governing DLT Networks - David Treat, Accenture & Rob Palatnick, DTCC

Accenture and DTCC have co-authored a paper, Governing DLT Networks, and will present their work with David Treat, MD, Global Blockchain Lead at Accenture and member of the Hyperledger Board and Rob Palatnick, CTO of DTCC and Chair of the Hyperledger Board. Proposing a governance operating model to address approaches to managing the activity, connectivity, software changes, contractual agreements and transaction finality for every participant across the network.

Blockchain Platform For A Billion Customers: A Telecom (Digital Marketing) Case Study - Babu Jayaraj, Reliance Jio Infocom Ltd.

India with 1.2+ Billion registered mobile subscribers have been plagued with unsolicited communications from the unregistered telemarketers. A consortium of telecom operators under the TRAI's guidance have built a Blockchain based platform to regulate marketing communications. This talk is about learnings/experiences in designing and building the Hyperledger Fabric based platform by consortium of telecom operators including choosing right technologies, overcoming platform stability issues, scaling performance and building business practices/process around the new platform.

Building Secure Protocols Using Ursa- Mike Lodder, Sovrin Foundation & Brent Zundel, Evernym

It's notoriously difficult to properly implement blockchain protocols that use cryptographic algorithms.In this talk, Mike and Brent will explain some of the features in Hyperledger Ursa and how to use them to solve some of the most common problems faced by people looking to build private and secure protocols on blockchains.

A Standardized Approach to Creating Digital Tokens - Paul DiMarzio, Enterprise Ethereum Alliance; Marley Gray, Microsoft & Jonathan Levi, HACERA

In this session, the speakers will lay out the value of digital tokens and dive into a few examples of how the Token Taxonomy Framework (TTF) can be used to simplify the design and implementation of new token classes.

DIDs without blockchains - Daniel Hardman, Evernym,

Decentralized Identifiers (DIDs) are like DNS without any registrars. They're a foundation of decentralized identity, and are relevant to most Hyperledger projects. In this session, Daniel will explain how peer DIDs work, and show developers how they can get support for them in an hour or a day (depending on their circumstances).

Panel: Business Interoperability – The Key to Supply Chain Traceability - Rich Meszaros & Sarah Banks, Accenture; Melanie Nuce, GS1 US; David Cecchi, Cargill

Technology such as blockchain has the power to solve complex challenges and achieve improved supply chain traceability. In order to tap into this powerful technology, interoperability, enabled by robust data and transaction standards, are a must! Segments of the supply chain, such as the food industry, have made significant progress leveraging data standards to support food safety and product transparency use cases.

Workshop: Intro to Hyperledger Besu - Danno Ferrin, ConsenSys

There is no better way to learn about Hyperledger Besu than by doing.In this session attendees will set up and run Hyperledger Besu nodes that connect to public networks as well as start their own permissioned network between the other attendees in the session.

Workshop: Hyperledger Fabric 101 - Swetha Repakula & Morgan Bauer, IBM

The workshop will involve participants standing up their own Hyperledger Fabric network, deploying smart contracts, and interacting with their contracts using decentralized applications. Attendees will leave the tutorial with a better understanding of the properties of permissioned blockchains, and decentralized application development. Recently announced Hyperledger Fabric 2.0 features and updates will also be explored.

Workshop: Hands-on Experience with Avalon on How to Bridge On-chain and Off-chain Worlds - Yevgeniy Yarmosh & Dan Anderson, Intel

Avalon addresses blockchain scalability and privacy challenges by moving compute intensive and private data processing off-chain. Other similar approaches typically trade resilience and integrity for scalability and privacy. During this workshop, you will understand Avalon architecture and how it extends a notion of computational trust.

Workshop: Getting Started with Indy and Aries: Beginner and Advanced Scenarios - Stephen Curran, Cloud Compass Computing, Inc. & John Jordan, Government of British Columbia (Canada),

This full day technical workshop will cover beginner and advanced sessions on getting started with Hyperledger Indy and Hyperledger Aries.

Keynote speakers confirmed so far:

Keynote: Don Tapscott: The Blockchain Revolution -State of the Union, Co-author, Blockchain Revolution: How the Technology Behind Bitcoin and Other Cryptocurrencies is Changing the World, and Co-founder, Blockchain Research Institute

Keynote: Sheila Warren: Blockchain Matters: How it’s Already Changing the World, Head of Blockchain and Distributed Ledger Technology, World Economic Forum

Other unique activities I’m personally excited about:

Diversity Happy Hour 

March 2, 6:00 - 8:30pm

Location: Renaissance Phoenix Downtown Hotel, Rooftop

Mentoring Session

March 3, 8:00 - 8:50am

Location: Phoenix Convention Center

Onsite Networking Reception & Booth Crawl

March 3,5:45 - 6:45pm

Location: Phoenix Convention Center, Sponsor Showcase

Hyperledger Public Meetup

March 3, 6:45 - 8:00pm

Location: Phoenix Convention Center

Offsite All Attendee Party

March 4, 7:00 - 10:00pm

Location: Corona Ranch and Rodeo Grounds

I look forward to seeing you there!

Brian

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Brian Behlendorf
Executive Director, Hyperledger
bbehlendorf@...
Twitter: @brianbehlendorf

I want to expose port from chain code container to host machine. From where peer node fire the docker run cmd .

How peer run the chain code container ? I want to expose port from chaincode container and map with host machine. 

I want to customized the docker run cmd fired from peer node.

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