93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
/*
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Copyright IBM Corp. 2016 All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"fmt"
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"strconv"
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"github.com/hyperledger/fabric/core/chaincode/shim"
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pb "github.com/hyperledger/fabric/protos/peer"
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)
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// EventSender example simple Chaincode implementation
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type EventSender struct {
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}
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// Init function
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func (t *EventSender) Init(stub shim.ChaincodeStubInterface) pb.Response {
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err := stub.PutState("noevents", []byte("0"))
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if err != nil {
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return shim.Error(err.Error())
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}
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return shim.Success(nil)
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}
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// Invoke function
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func (t *EventSender) invoke(stub shim.ChaincodeStubInterface, args []string) pb.Response {
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b, err := stub.GetState("noevents")
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if err != nil {
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return shim.Error("Failed to get state")
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}
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noevts, _ := strconv.Atoi(string(b))
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tosend := "Event " + string(b)
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for _, s := range args {
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tosend = tosend + "," + s
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}
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err = stub.PutState("noevents", []byte(strconv.Itoa(noevts+1)))
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if err != nil {
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return shim.Error(err.Error())
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}
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err = stub.SetEvent("evtsender", []byte(tosend))
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if err != nil {
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return shim.Error(err.Error())
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}
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return shim.Success(nil)
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}
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// Query function
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func (t *EventSender) query(stub shim.ChaincodeStubInterface, args []string) pb.Response {
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b, err := stub.GetState("noevents")
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if err != nil {
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return shim.Error("Failed to get state")
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}
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jsonResp := "{\"NoEvents\":\"" + string(b) + "\"}"
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return shim.Success([]byte(jsonResp))
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}
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func (t *EventSender) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
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function, args := stub.GetFunctionAndParameters()
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if function == "invoke" {
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return t.invoke(stub, args)
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} else if function == "query" {
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return t.query(stub, args)
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}
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return shim.Error("Invalid invoke function name. Expecting \"invoke\" \"query\"")
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}
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func main() {
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err := shim.Start(new(EventSender))
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if err != nil {
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fmt.Printf("Error starting EventSender chaincode: %s", err)
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}
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}
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