class 9.txt

Fabric network: 5 Banks
------------------------

Bank1 , Bank2, Bank3, Bank4, Regulator Bank----> Bond Management


Bond creation has some private fields which cant be shared with other banks and can only be shared by Regulator

Banks ----> channel ----> Regulator Bank ---> bond creation txn --->

Policy ---> channel1 ---> {bank1, regular)     /bank1/channel1/
            channel2 ---> {bank2, regulator)   /bank2/channel2

            overhead of channels is there

all other public ledger ----> /bond network/banks/data

Private Data:
-------------

Private Data ---- {bond value: 100 CR, bond attested by:, bond insured bay: } ---> data will be masked and plain data is not visible to other users

 other hash ({bond value: 100 CR, bond attested by:, bond insured bay: }) ----> huihiu8768976876089698 --> hash 

 offchain DB --->  

 ( pvt data collection1 ---> {bond value: 100 CR, bond attested by:, bond insured bay: } ----> huihiu8768976876089698 )



Network:
--------

1. peer1 , peer2, peer3, peer4, peer5 
2. peer1MSP, peer2MSP, peer3MSP ....etc
3. 


Integrnet banks ---- 50000 TPS (digital sign validation for every txn)
 clinet(bank1) , peer, orderer, peer, client(bank2) --- 5 steps that too validating signatures -- 5 steps
 security and High avail

bank1 ---> settlement bank ----> bank2 --- 2 step process
 trantion -- faster settlemenst
sudo apt-get install curl (curl is used to download files from command line)


curl --version           ---> used for downloading any files from websites
node --version           ---> its a lang compiler
git  --version           ---> is a repository hosted for any open source projects
python --version         ---> pythn compiler
docker --version         ---> running code as container
docker-compose version   ---> used for running multiple services in a single file/command


sudo chmod 666 /var/run/docker.sock

sudo restart docker

sudo curl -sSL https://bit.ly/2ysbOFE | bash -s -- 2.2.2 1.4.9

cd fabric-samples/test-network


to start fabric network:
--------------------------

1. Hyperledger fabric peer image
2. Hyperledger fabric orderer image
3. Hyperledger fabric CA image


how many peers are there ?
how many orderer are ther ?
how many CA are there ?

by default if we uses test network ---> 2 peer, 1 orderer




sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

docker-compose --version


client:
--------

1. open file
2. check balance from db
3. transfer from usera to userb3


server:
-------

event loops


a) open file      ---> event1 process
b) check balance  ---> event2
c) transfer       ---> event3 

package com.jhjh

public class helloWorld {

 public static void main (string []args) {
    system.out.println("helloworld")
}
}

compile ---> java ---> javac helloWorld.java


Prerequisites to create a websever :
------------------------------------

1. use the http module
2. mention a port on which the server runs
3. IP address or localhost

int a ;
char b;

var 




Fabric SDK --- java, javascript, Go

var client = require ('fabric-ca-client')
var network = require ('fabric-network')

 function submit transaction (req, res)
   {
     network.submit (tx1, {user1, user2, 100 RS}
   }