history

Demonstrates the use of history

History.go chaincode manages Cars as assets on the chain. Each Car managed on the chain is identified by a key = VIN (Vehicle Identification Number) Test data will be setup in the init() function

TransferOwnership = Transaction to Transfer the ownership of the car GetVehicleHistory = History of all ownership transfer transactions can be retrieved

Setup chaincode vendoring

Switch to the chaincode folder. cd $GOPATH/src/token/history ./govendor.sh

If vendoring is not done the "instantiate" command will fail in net mode This script may take upto 10+ min sometime :) PLEASE be patient (ignore warning/error)

Setup the chaincode

. set-env.sh acme set-chain-env.sh -n history -v 1.0 -p token/history -c '{"Args":["init"]}'

Validate chaincode

chain.sh install chain.sh instantiate

set-chain-env.sh -q '{"Args": ["GetVehicleByVin", "100"]}' chain.sh query

set-chain-env.sh -i '{"Args": ["TransferOwnership", "100","J Smith","H Koolaid","2019-01-01"]}' chain.sh invoke

set-chain-env.sh -i '{"Args": ["TransferOwnership", "100","H Koolaid","M Rainbow","2019-02-01"]}' chain.sh invoke

set-chain-env.sh -q '{"Args": ["GetVehicleHistory", "100"]}' chain.sh query

Assets:

VIN,Make,Model,Year,Owner 100,toyota,corolla,2001,J Smith 200,honda,civic,199,G Roger 300,audi,a5,1999,S Ripple 400,bmw,x5,2013,M Jane 500,toyota,camry,2018,J Hoover

KeyModification

https://godoc.org/github.com/hyperledger/fabric/protos/ledger/queryresult

Additional function

set-chain-env.sh -q '{"Args": ["GetVehiclesByYear", "2012"]}' chain.sh query

Index JSON: { "index": { "fields": [ "year" ] }, "name": "index-on-year", "ddoc": "index-on-year", "type": "json" }