class 9.txt

Bitcoin ---> Bitcoin scripts
Ethereum --> solidity
Hyperledger Fabric --> Common programming languages for writing applications
                       (node js, java, golang, python)
Corda
PolkaDot
Solana
Heder Hashgraph




5 banks wishes to use Fabric for Credit score ledger

HDFC, ICICI, SBI, RBI, IDFC ---->

creditenquiry txn from HDFC ---> {custid:1, custname: Robert, SSN:12345, Score:750)
 Channels ---> for securely communicating in the network
               {custid:1, custname: Robert, Private fields(SSN:12345, Score:750) ---> Masked/hashed to store tha ctual data in the network}



RBI ---> decide upon the onboarding process

HDFC, ICICI, SBI, ABC, IDFC ----> all 5 Banks can decide or only 3 banks can decided or 1 bank can decide

POlicies: get confirmation from HDFCMSP AND IDICIMSP AND SBIMSP AND ABCMSP AND IDFCMSP
          we can decide like any of the 3 banks can approve the onboarding request ---> 


1. (openssl, cert manager, ) Membership (registration and enrollment process to generate their identities) ---> Is the identity process to generate x509 certificates
2. Chaincode  (business logics written as smart contract on Fabric) ---> docker containers


Membership Service: (Fabric-CA)

1. registration
2. enrollment 

 Thus generating an identity certificate for each and every node in the network
 
Onboard HDFC Bank:

{
 Bank Common Name : HDFC
 Bank OU          : Blockchain Dept (Financail Reconciliation)
 Bank SerialNumber :0809890797989070
 Bank Locality    : Mumbai
}

 Fabric-CA 

func createIdentity (identity, cert)
 {

   cert = createIdentity(identity Struc)
 }

Membership Service Provider ----> HDFCMSP
                            ----> ICICMSP
                            ----> SBIMSP  

to create certificates, we need public and private key ---->

 /public/ ---> public key
 /private/ --> private key
 /MSP/     --> Certficate

ROOT CA will help in validating the certficates and MSP for every node

JPMorgan chase ----> parent org ---> root ca

Bank1 ---> channel1 ---> (Bank2, bank3, Bank4)  ---> Ledger1

bank1 ---> channel2 ---> Bank5, bank6, bank7   ---> Ledger13

 Ledger12 + Ledger 13 ---> Global Ledger for Bank1


default channel --->



HDFC Bank: 8 peers

 hdfc.org.peer1, hdfc.org.peer2, hdfc.org.peer3 - endorse peer
 hdfc.org.peer4, hdfc.org.peer5, hdfc.org.peer6 - commmit peers
 hdfc.org.peer1.leader,hdfc.org.peer2,          - leader peer
 hdfc.org.peer1.anchor                          - anchor peer 

endrosement policy ---> AND (hdfc.org.peer1, hdfc.org.peer2, hdfc.org.peer3)
 
regulators ---> RBI, NPCI ---> ordering servcies

5 banks --- a b c d e ---> 5 banks can be part of ordering node Ordering (banka banka bankc bankd banke)


RAFT consensus in Fabric


sudo rm /usr/local/bin/docker-compose
sudo apt remove docker-compose
sudo apt autoremove
docker-compose version
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
sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/bin/docker-compose
sudo chmod +x /usr/bin/docker-compose
docker-compose version


sudo chmod 666 /var/run/docker.sock

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


cd fabric-samples/test-network
sudo chmod 666 /var/run/docker.sock
sudo systemctl unmask docker
sudo systemctl start docker
sudo systemctl restart docker.socket docker.service
sudo chmod 666 /var/run/docker.sock
sudo ./network.sh up
sudo docker ps