CODEWITHSUNDEEP
hyperledger-fabricblockchainhyperledgerhyperledger-chaincode
muhammad ahmed
muhammad ahmed

Reputation: 77

Installing smart contract on multi peer of same Organisation

I have a question regarding Installing smart contact on peers. There is a Hyperledger fabric network having one organization Org1 and four peers.

peer0.org1.example.com

peer2.org1.example.com

peer3.org1.example.com

peer4.org1.example.com

While creating the network do we have to install smart contracts on each peer or only on one peer. If it is installed on one peer so in that case do other peer gets the smart contract in the background automatically. In the below code, I can see that contract is only installed on one peer.

echo "Installing smart contract on peer0.org1.example.com"
docker exec \
  -e CORE_PEER_LOCALMSPID=Org1MSP \
  -e CORE_PEER_ADDRESS=peer0.org1.example.com:7051 \
  -e CORE_PEER_MSPCONFIGPATH=${ORG1_MSPCONFIGPATH} \
  -e CORE_PEER_TLS_ROOTCERT_FILE=${ORG1_TLS_ROOTCERT_FILE} \
  cli \
  peer chaincode install \
    -n autokab \
    -v 1.0 \
    -p "$CC_SRC_PATH" \
    -l "$CC_RUNTIME_LANGUAGE"

Upvotes: 0

Views: 143

Answers (2)

Ta-seen Junaid
Ta-seen Junaid

Reputation: 474

If you want to invoke or query data from a ledger that is hosted by a peer, you have to install smart contracts.

Your peer can validate and commit transactions into the ledger due to underlying system but for invoke or query data from ledger, you need to install smart contracts.

Upvotes: 0

MBB
MBB

Reputation: 1695

On a high level -

Chaincode should only be installed on endorsing peer nodes of the owning members of the chaincode to protect the confidentiality of the chaincode logic from other members on the network. Those members without the chaincode, can’t be the endorsers of the chaincode’s transactions; that is, they can’t execute the chaincode. However, they can still validate and commit the transactions to the ledger.

In your example only peer0.org1.example.com will become endorsing peer and has the below capability -

Every peer with a smart contract can be an endorsing peer if it has a smart contract installed. However, to actually be an endorsing peer, the smart contract on the peer must be used by a client application to generate a digitally signed transaction response.

You can see the Transaction Flow example

And for more documentation

Upvotes: 0

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