// Query callback representing the query of a chaincode
func (t *SimpleChaincode) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function == "uuid" {
return t.getUUID(stub, args)
} else if function != "query" {
return nil, errors.New("Invalid query function name. Expecting \"query\"")
}
var A string // Entities
var uuid string // Under which chaincode the state is stored
var err error
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting UUID and key to query")
}
uuid = args[0]
A = args[1]
// Get the state from the ledger
Avalbytes, err := stub.GetStateUUID(A, uuid)
if err != nil {
jsonResp := "{\"Error\":\"Failed to get state for " + A + " from uuid " + uuid + "\"}"
return nil, errors.New(jsonResp)
}
// If the amout is nil, shouldn't the query still be returned?
/*
if Avalbytes == nil {
jsonResp := "{\"Error\":\"Nil amount for " + A + "\"}"
return nil, errors.New(jsonResp)
}
*/
jsonResp := "{\"Name\":\"" + A + "\",\"Amount\":\"" + string(Avalbytes) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return Avalbytes, nil
}