Each peer logs its block commit hash every block at INFO level. The block commit hash is a hash over all valid transactions that are written to state database. So you can compare block commit hashes

I saw that if the OS is malicious then a fork may happen by sending different peers different blocks. Is that detectable? If a client made a query to the world state would that be subject to any

I was just researching what happens when some orderers were taken over by an attacker. If say I have 5 ordering nodes, and 3 are taken over, is there a way to detect which 3 are malicious. I was

Hyperledger Fabric Documentation Workgroup call - Western hemisphere When: Friday, 13 March 2020 4:00pm to 5:00pm (GMT+00:00)

Well, if you don't define bootstrap peersand you have no anchor peers then the conditions to establish membershipbetween peers are not met, thus peers will not disseminate blocks to eachother. This

Reminder: Hyperledger Fabric Documentation Workgroup call - Western hemisphere When: Friday, 13 March 2020, 4:00pm to 5:00pm, (GMT+00:00) Europe/London Where:https://zoom.us/j/6223336701 View

I thought gossip was always used? What is the alternative? Trevor

An org? Sure. A peer? Well maybe, if you don't useany bootstrap peers or anchor peers so gossip isn't used. From: "Trevor Lee Oakley"<trevor@...> To: "Yacov Manevich"<YACOVM@...> Cc:

It is true that you'll see higher throughput if you load balance endorsement requests across multiple peers. You likely want multiple peers per org anyways for HA purpose. I suspect that error message

I just saw a few research papers - seems they can be constructed. But can an org handle thousands of channels?

They do not exist, but who knows? maybein the future they will. From: "Trevor Lee Oakley"<trevor@...> To: "Yacov" <yacovm@...> Cc: <fabric@...> Date: 03/13/2020 04:34

local collections would be nice to use but the business level need to is to completely hide the txn data (ie even that it exists to other members). I did not know anonymous endorsements were viable.

The network was partly designed already and that criteria of all orgs having their own peers was already incorporated into the design. I checked into multiple MSPs, OUs, and I was wondering if we

Sounds like what you need is local collectionswith anonymous endorsements. From: "Trevor Lee Oakley"<trevor@...> To: <fabric@...> Date: 03/13/2020 03:53 PM Subject: [EXTERNAL]

Do your suppliers really need to operate their own Peers? If so, why? Can not you, and/or independent third parties operate the network and provide API's for your suppliers to submit data? Then you

I have a supply chain with one org which has 5,000 suppliers (orgs). We cannot allow txns to be seen at all by competing orgs, ie not even the evidence of a relationship between the orgs. Is the

Hi, We are developing blockchain application on hyperledger fabric which consist of multiple organizations involved in the transaction and also one authorised organization which will monitor that

The block files can be found in /var/hyperledger/production/ledgersData Brett Logan Software Engineer, IBM Blockchain Phone: 1-984-242-6890 E-mail: brett.t.logan@...

I want to check out what data is actually stored on the blockchain. Where is the actual blockchain file stored eg for the test-network. I tried looking for it, I found a genesis block and that was

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