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How to upgrade chaincode

From Vagrant :

Looking for chaincode upgrade instructions ?

Following instructions might help you

Pre-requisites:

Refer here

Vagrant Terminal Tab 1:

Start the Orderer

orderer

Vagrant Terminal Tab 2:

Start the peer

peer node start -o 127.0.0.1:7050

Vagrant Terminal Tab 3:

Install chaincode example01

Install chaincode example01 on the peer

peer chaincode install -n mycc -v 1.0 -p github.com/hyperledger/fabric/examples/chaincode/go/chaincode_example01

NOTE: If there are any issues with chaincode installation , please check troubleshoot

Instantiate

Instantiate chaincode example01

peer chaincode instantiate -o 127.0.0.1:7050 -n mycc -v 1.0 -c '{"Args":["init","a", "100", "b","200"]}'

After succesful chaincode instantiation, you would see chaincode containers with the command docker ps

CONTAINER ID        IMAGE                 COMMAND                  CREATED             STATUS              PORTS               NAMES
174c1678678f        dev-jdoe-mycc-1.0   "chaincode -peer.a..."   32 seconds ago      Up 31 seconds                           dev-jdoe-mycc-1.0

Invoke

Issue an invoke on example01 to move "10" from "a" to "b":

peer chaincode invoke -o 127.0.0.1:7050 -n mycc -c '{"Args":["invoke","10"]}'

Query

Query on example01

Query for the value of "a"

peer chaincode query -n mycc -c '{"Args":["query","a"]}'

OUTPUT:

Error: Error endorsing query: rpc error: code = 2 desc = Invalid invoke function name. Expecting "invoke"

query function not available ?

UPGRADE

You lately realized that there is no function called query available in your chaincode and you added the same in your new chaincode implementation (call it example02), and wanted to upgrade your chaincode with new version.

Install chaincode example02

peer chaincode install -n mycc -v 2.0 -p github.com/hyperledger/fabric/examples/chaincode/go/chaincode_example02

NOTE: Notice the change in the version number to 2.0 and the chaincode path to example02

Upgrade

peer chaincode upgrade -o 127.0.0.1:7050 -n mycc -v 2.0 -c '{"Args":["init","a", "100", "b","200"]}'

NOTE notice upgrade with the new version 2.0

Invoke

Issue an invoke on example02 to move "10" from "a" to "b":

peer chaincode invoke -o 127.0.0.1:7050 -n mycc -c '{"Args":["invoke","a","b","10"]}'

Query

Query on UPGRADED chaincode example02

Query for the value of "a"

peer chaincode query -n mycc -c '{"Args":["query","a"]}'

OUTPUT:

Query Result: 90

Hurray , Updated chaincode succesfully.