101 lines
2.7 KiB
Go
101 lines
2.7 KiB
Go
/*
|
|
Copyright IBM Corp. 2016 All Rights Reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
// This program is an erroneous chaincode program that attempts to put state in query context - query should return error
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
|
|
"github.com/hyperledger/fabric/core/chaincode/shim"
|
|
pb "github.com/hyperledger/fabric/protos/peer"
|
|
)
|
|
|
|
// SimpleChaincode example simple Chaincode implementation
|
|
type SimpleChaincode struct {
|
|
}
|
|
|
|
// Init takes a string and int. These are stored as a key/value pair in the state
|
|
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response {
|
|
var A string // Entity
|
|
var Aval int // Asset holding
|
|
var err error
|
|
_, args := stub.GetFunctionAndParameters()
|
|
if len(args) != 2 {
|
|
return shim.Error("Incorrect number of arguments. Expecting 2")
|
|
}
|
|
|
|
// Initialize the chaincode
|
|
A = args[0]
|
|
Aval, err = strconv.Atoi(args[1])
|
|
if err != nil {
|
|
return shim.Error("Expecting integer value for asset holding")
|
|
}
|
|
fmt.Printf("Aval = %d\n", Aval)
|
|
|
|
// Write the state to the ledger - this put is legal within Run
|
|
err = stub.PutState(A, []byte(strconv.Itoa(Aval)))
|
|
if err != nil {
|
|
return shim.Error(err.Error())
|
|
}
|
|
|
|
return shim.Success(nil)
|
|
}
|
|
|
|
// Invoke is a no-op
|
|
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
|
|
function, args := stub.GetFunctionAndParameters()
|
|
if function == "query" {
|
|
return t.query(stub, args)
|
|
}
|
|
|
|
return shim.Error("Invalid invoke function name. Expecting \"query\"")
|
|
}
|
|
|
|
func (t *SimpleChaincode) query(stub shim.ChaincodeStubInterface, args []string) pb.Response {
|
|
var A string // Entity
|
|
var Aval int // Asset holding
|
|
var err error
|
|
|
|
if len(args) != 2 {
|
|
return shim.Error("Incorrect number of arguments. Expecting 2")
|
|
}
|
|
|
|
A = args[0]
|
|
Aval, err = strconv.Atoi(args[1])
|
|
if err != nil {
|
|
return shim.Error("Expecting integer value for asset holding")
|
|
}
|
|
fmt.Printf("Aval = %d\n", Aval)
|
|
|
|
// Write the state to the ledger - this put is illegal within Run
|
|
err = stub.PutState(A, []byte(strconv.Itoa(Aval)))
|
|
if err != nil {
|
|
jsonResp := "{\"Error\":\"Cannot put state within chaincode query\"}"
|
|
return shim.Error(jsonResp)
|
|
}
|
|
|
|
return shim.Success(nil)
|
|
}
|
|
|
|
func main() {
|
|
err := shim.Start(new(SimpleChaincode))
|
|
if err != nil {
|
|
fmt.Printf("Error starting chaincode: %s", err)
|
|
}
|
|
}
|