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jsonhyperledger-fabrichyperledgerhyperledger-chaincode

How to send an object array as args in Chaincode for hyperledger fabric

I have an object array like below

[ {"name":"heamoglobin","reading":"12"},
  {"name":"mrc","reading":"3.3"},
  {"name":"hct","reading":"33"} ]

I need to send this as an argument for my chaincode function. I tried stringifying the whole array like this

"[{\"name\":\"heamoglobin\",\"reading\":\"12\"},{\"name\":\"mrc\",\"reading\":\"3.3\"},{\"name\":\"hct\",\"reading\":\"33\"}]"

but didnt get a successful transaction

Any suggestions?

Solution

  • You must convert to string each parameter that is not already string. Something like:

    await contract.submitTransaction("createReport", uid, req.body.patientID, user[0].email, clinicProfile.centerName, date.toString(), JSON.stringify(data));

    And then process suitably every parameter in your chaincode's operation (unmarshal the array, etc.).