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integration/lifecycle/testdata/chaincode/simple-v14/chaincode.go
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/* | ||
Copyright IBM Corp. All Rights Reserved. | ||
SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
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package main | ||
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import ( | ||
"fmt" | ||
"os" | ||
"strconv" | ||
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"github.com/hyperledger/fabric/core/chaincode/shim" | ||
pb "github.com/hyperledger/fabric/protos/peer" | ||
) | ||
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// SimpleChaincode example simple Chaincode implementation | ||
type SimpleChaincode struct { | ||
} | ||
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func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response { | ||
fmt.Println("Init invoked") | ||
_, args := stub.GetFunctionAndParameters() | ||
var A, B string // Entities | ||
var Aval, Bval int // Asset holdings | ||
var err error | ||
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if len(args) != 4 { | ||
return shim.Error("Incorrect number of arguments. Expecting 4") | ||
} | ||
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// Initialize the chaincode | ||
A = args[0] | ||
Aval, err = strconv.Atoi(args[1]) | ||
if err != nil { | ||
return shim.Error("Expecting integer value for asset holding") | ||
} | ||
B = args[2] | ||
Bval, err = strconv.Atoi(args[3]) | ||
if err != nil { | ||
return shim.Error("Expecting integer value for asset holding") | ||
} | ||
fmt.Printf("Aval = %d, Bval = %d\n", Aval, Bval) | ||
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// Write the state to the ledger | ||
err = stub.PutState(A, []byte(strconv.Itoa(Aval))) | ||
if err != nil { | ||
return shim.Error(err.Error()) | ||
} | ||
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err = stub.PutState(B, []byte(strconv.Itoa(Bval))) | ||
if err != nil { | ||
return shim.Error(err.Error()) | ||
} | ||
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fmt.Println("Init returning with success") | ||
return shim.Success(nil) | ||
} | ||
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func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response { | ||
fmt.Println("SimpleChaincode Invoke") | ||
function, args := stub.GetFunctionAndParameters() | ||
switch function { | ||
case "invoke": | ||
// Make payment of X units from A to B | ||
return t.invoke(stub, args) | ||
case "delete": | ||
// Deletes an entity from its state | ||
return t.delete(stub, args) | ||
case "query": | ||
// the old "Query" is now implemented in invoke | ||
return t.query(stub, args) | ||
case "respond": | ||
// return with an error | ||
return t.respond(stub, args) | ||
default: | ||
return shim.Error(`Invalid invoke function name. Expecting "invoke", "delete", "query", or "respond"`) | ||
} | ||
} | ||
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// Transaction makes payment of X units from A to B | ||
func (t *SimpleChaincode) invoke(stub shim.ChaincodeStubInterface, args []string) pb.Response { | ||
var A, B string // Entities | ||
var Aval, Bval int // Asset holdings | ||
var X int // Transaction value | ||
var err error | ||
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if len(args) != 3 { | ||
return shim.Error("Incorrect number of arguments. Expecting 3") | ||
} | ||
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A = args[0] | ||
B = args[1] | ||
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// Get the state from the ledger | ||
// TODO: will be nice to have a GetAllState call to ledger | ||
Avalbytes, err := stub.GetState(A) | ||
if err != nil { | ||
return shim.Error("Failed to get state") | ||
} | ||
if Avalbytes == nil { | ||
return shim.Error("Entity not found") | ||
} | ||
Aval, _ = strconv.Atoi(string(Avalbytes)) | ||
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Bvalbytes, err := stub.GetState(B) | ||
if err != nil { | ||
return shim.Error("Failed to get state") | ||
} | ||
if Bvalbytes == nil { | ||
return shim.Error("Entity not found") | ||
} | ||
Bval, _ = strconv.Atoi(string(Bvalbytes)) | ||
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// Perform the execution | ||
X, err = strconv.Atoi(args[2]) | ||
if err != nil { | ||
return shim.Error("Invalid transaction amount, expecting a integer value") | ||
} | ||
Aval = Aval - X | ||
Bval = Bval + X | ||
fmt.Printf("Aval = %d, Bval = %d\n", Aval, Bval) | ||
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// Write the state back to the ledger | ||
err = stub.PutState(A, []byte(strconv.Itoa(Aval))) | ||
if err != nil { | ||
return shim.Error(err.Error()) | ||
} | ||
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err = stub.PutState(B, []byte(strconv.Itoa(Bval))) | ||
if err != nil { | ||
return shim.Error(err.Error()) | ||
} | ||
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return shim.Success(nil) | ||
} | ||
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// Deletes an entity from state | ||
func (t *SimpleChaincode) delete(stub shim.ChaincodeStubInterface, args []string) pb.Response { | ||
if len(args) != 1 { | ||
return shim.Error("Incorrect number of arguments. Expecting 1") | ||
} | ||
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A := args[0] | ||
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// Delete the key from the state in ledger | ||
err := stub.DelState(A) | ||
if err != nil { | ||
return shim.Error("Failed to delete state") | ||
} | ||
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return shim.Success(nil) | ||
} | ||
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// query callback representing the query of a chaincode | ||
func (t *SimpleChaincode) query(stub shim.ChaincodeStubInterface, args []string) pb.Response { | ||
var A string // Entities | ||
var err error | ||
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if len(args) != 1 { | ||
return shim.Error("Incorrect number of arguments. Expecting name of the person to query") | ||
} | ||
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A = args[0] | ||
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// Get the state from the ledger | ||
Avalbytes, err := stub.GetState(A) | ||
if err != nil { | ||
jsonResp := "{\"Error\":\"Failed to get state for " + A + "\"}" | ||
return shim.Error(jsonResp) | ||
} | ||
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if Avalbytes == nil { | ||
jsonResp := "{\"Error\":\"Nil amount for " + A + "\"}" | ||
return shim.Error(jsonResp) | ||
} | ||
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jsonResp := "{\"Name\":\"" + A + "\",\"Amount\":\"" + string(Avalbytes) + "\"}" | ||
fmt.Printf("Query Response:%s\n", jsonResp) | ||
return shim.Success(Avalbytes) | ||
} | ||
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// respond simply generates a response payload from the args | ||
func (t *SimpleChaincode) respond(stub shim.ChaincodeStubInterface, args []string) pb.Response { | ||
if len(args) != 3 { | ||
return shim.Error("expected three arguments") | ||
} | ||
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status, err := strconv.ParseInt(args[0], 10, 32) | ||
if err != nil { | ||
return shim.Error(err.Error()) | ||
} | ||
message := args[1] | ||
payload := []byte(args[2]) | ||
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return pb.Response{ | ||
Status: int32(status), | ||
Message: message, | ||
Payload: payload, | ||
} | ||
} | ||
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func main() { | ||
err := shim.Start(new(SimpleChaincode)) | ||
if err != nil { | ||
fmt.Fprintf(os.Stderr, "Exiting SimpleChaincode: %s", err) | ||
os.Exit(2) | ||
} | ||
} |
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# Copyright IBM Corp. All Rights Reserved. | ||
# | ||
# SPDX-License-Identifier: Apache-2.0 | ||
# | ||
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version: '2' | ||
services: | ||
cli: | ||
container_name: cli | ||
image: hyperledger/fabric-tools:1.4 | ||
tty: true | ||
stdin_open: true | ||
working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer | ||
command: /bin/bash | ||
volumes: | ||
- /var/run/:/host/var/run/ | ||
- ./chaincode/:/opt/gopath/src/github.com/chaincode |
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