Storing Data on Blockchain

[Py-Ec]

I am working on a POC where I have to store some data e.g. ID of an object, price, owner and things like that. Is it possible to store such things on Blockchain using smart contracts. And if not what are the ways to use Blockchain to achieve it. (I did some research, and people are using Blockchain in SCM industry. They must have stored these kind of datas).

[juddydev]

you can try the this link

[texora]

Yes if you use Ethereum smart contracts you can define your contract and store it with transactions.

https://www.ethereum.org/greeter

Note that if you don't encrypt the data stored in the contract it will be accessible by everyone.

Consider following tutorial from Hyperledger Fabric "Getting Started" pages.

Basically you implement requested logic on by leveraging chaincodes, you will have to implement following golang interface:

// Chaincode interface must be implemented by all chaincodes. The fabric runs
// the transactions by calling these functions as specified.
type Chaincode interface {
// Init is called during Instantiate transaction after the chaincode container
// has been established for the first time, allowing the chaincode to
// initialize its internal data
Init(stub ChaincodeStubInterface) pb.Response

// Invoke is called to update or query the ledger in a proposal transaction.
// Updated state variables are not committed to the ledger until the
// transaction is committed.
Invoke(stub ChaincodeStubInterface) pb.Response
}
For example something similar to this:

type myStoreChaincode struct {
}

func (cc *myStoreChaincode) Init(stub ChaincodeStubInterface) pb.Response {
return shim.Success(nil)
}

func (cc *myStoreChaincode) Invoke(stub ChaincodeStubInterface) pb.Response {
action, params = stub.GetFunctionAndParameters()
if action == "storeItem" {
cc.StoreItem(stub, params)
}

// Handle here other cases and possible parameters combinations
return shim.Success(nil)
}

func (cc *myStoreChaincode) StoreItem(stub ChaincodeStubInterface, params []string) {
// Store item on ledger, where params[0] is a key and params[1] actual value
stub.PutState(params[0], params[1])
}
This is only a simplified version, while for more complex you can follow "Writing Your Application" tutorial.