Tools, FAQ, Tutorials:
View Channel Blockchain and Download Blocks
How to View Blockchain and Download Blocks of a Hyperledger Fabric Channel?
✍: FYIcenter.com
You can follow this tutorial to
View Blockchain and Download Blocks of a Hyperledger Fabric Channel.
1. Connect to the CLI container of the Hyperledger Fabric network:
$ docker exec -it cli bash bash-4.4#
2. List channels joined by the default peer:
bash-4.4# echo $CORE_PEER_ADDRESS peer0.org1.example.com:7051 bash-4.4# peer channel list Channels peers has joined: mychannel
3. Get the blockchain info of a given channel:
bash-4.4# peer channel getinfo -c mychannel Blockchain info: {"height":6, "currentBlockHash":"rriN9xJHYX+c2xo7qIqNvxNlcGFRAADgA4hIg7byvwE=", "previousBlockHash":"KDjkXFvRJAcYTp2ralLNhMAD3eZc0LxfQyHr9DZgl0M=" }
4. Download (fetch) the newest block:
bash-4.4# peer channel fetch newest newest.block -c mychannel [channelCmd] InitCmdFactory -> INFO 001 Endorser and orderer connections initialized [cli.common] readBlock -> INFO 002 Received block: 5 bash-4.4# ls -l -rw-r--r-- 1 root root 4921 Apr 1 18:00 newest.block
5. Download (fetch) the first block:
bash-4.4# peer channel fetch 0 newest.block -c mychannel [channelCmd] InitCmdFactory -> INFO 001 Endorser and orderer connections initialized [cli.common] readBlock -> INFO 002 Received block: 0 bash-4.4# ls -l -rw-r--r-- 1 root root 15995 Apr 13 18:07 first.block -rw-r--r-- 1 root root 4921 Apr 1 18:00 newest.block
Note that block 5 is the 6th block of the blockchain, because the first block is labeled as block 0.
⇒ Inspect Transaction Blocks of Channel Blockchain
⇐ "peer chaincode invoke" on BYFN
2020-08-13, 825👍, 0💬
Popular Posts:
How to reinstall npm with a node version manager? I am getting permission errors with the current ve...
How to convert JSON Objects to PHP Associative Arrays using the json_decode() function? Actually, JS...
How To Remove Slashes on Submitted Input Values in PHP? By default, when input values are submitted ...
How To Get the Minimum or Maximum Value of an Array in PHP? If you want to get the minimum or maximu...
What Is Azure API Management Service? Azure API Management as a turnkey solution for publishing APIs...