From 2436db04f6cd6b0c960b346e384fa4641632f536 Mon Sep 17 00:00:00 2001 From: Pritam Singh Date: Wed, 8 Apr 2020 09:18:55 +0530 Subject: [PATCH 1/2] upgraded abstore golang chaincode to use contract-api package Signed-off-by: Pritam Singh --- chaincode/abstore/go/abstore.go | 138 +++++++++----------------------- chaincode/abstore/go/go.mod | 13 +-- chaincode/abstore/go/go.sum | 118 ++++++++++++++++++++------- 3 files changed, 133 insertions(+), 136 deletions(-) diff --git a/chaincode/abstore/go/abstore.go b/chaincode/abstore/go/abstore.go index 55f13820ac..ac0e211940 100644 --- a/chaincode/abstore/go/abstore.go +++ b/chaincode/abstore/go/abstore.go @@ -17,177 +17,119 @@ limitations under the License. package main import ( + "errors" "fmt" "strconv" - "github.com/hyperledger/fabric-chaincode-go/shim" - pb "github.com/hyperledger/fabric-protos-go/peer" + "github.com/hyperledger/fabric-contract-api-go/contractapi" ) // ABstore Chaincode implementation type ABstore struct { + contractapi.Contract } -func (t *ABstore) Init(stub shim.ChaincodeStubInterface) pb.Response { +func (t *ABstore) Init(ctx contractapi.TransactionContextInterface, A string, Aval int, B string, Bval int) error { fmt.Println("ABstore Init") - _, args := stub.GetFunctionAndParameters() - var A, B string // Entities - var Aval, Bval int // Asset holdings var err error - - if len(args) != 4 { - return shim.Error("Incorrect number of arguments. Expecting 4") - } - // 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) - // Write the state to the ledger - err = stub.PutState(A, []byte(strconv.Itoa(Aval))) + err = ctx.GetStub().PutState(A, []byte(strconv.Itoa(Aval))) if err != nil { - return shim.Error(err.Error()) + return err } - err = stub.PutState(B, []byte(strconv.Itoa(Bval))) + err = ctx.GetStub().PutState(B, []byte(strconv.Itoa(Bval))) if err != nil { - return shim.Error(err.Error()) + return err } - return shim.Success(nil) -} - -func (t *ABstore) Invoke(stub shim.ChaincodeStubInterface) pb.Response { - fmt.Println("ABstore Invoke") - function, args := stub.GetFunctionAndParameters() - if function == "invoke" { - // Make payment of X units from A to B - return t.invoke(stub, args) - } else if function == "delete" { - // Deletes an entity from its state - return t.delete(stub, args) - } else if function == "query" { - // the old "Query" is now implemtned in invoke - return t.query(stub, args) - } - - return shim.Error("Invalid invoke function name. Expecting \"invoke\" \"delete\" \"query\"") + return nil } // Transaction makes payment of X units from A to B -func (t *ABstore) invoke(stub shim.ChaincodeStubInterface, args []string) pb.Response { - var A, B string // Entities - var Aval, Bval int // Asset holdings - var X int // Transaction value +func (t *ABstore) Invoke(ctx contractapi.TransactionContextInterface, A, B string, X int) error { var err error - - if len(args) != 3 { - return shim.Error("Incorrect number of arguments. Expecting 3") - } - - A = args[0] - B = args[1] - + var Aval int + var Bval int // Get the state from the ledger // TODO: will be nice to have a GetAllState call to ledger - Avalbytes, err := stub.GetState(A) + Avalbytes, err := ctx.GetStub().GetState(A) if err != nil { - return shim.Error("Failed to get state") + return fmt.Errorf("Failed to get state") } if Avalbytes == nil { - return shim.Error("Entity not found") + return fmt.Errorf("Entity not found") } Aval, _ = strconv.Atoi(string(Avalbytes)) - Bvalbytes, err := stub.GetState(B) + Bvalbytes, err := ctx.GetStub().GetState(B) if err != nil { - return shim.Error("Failed to get state") + return fmt.Errorf("Failed to get state") } if Bvalbytes == nil { - return shim.Error("Entity not found") + return fmt.Errorf("Entity not found") } Bval, _ = strconv.Atoi(string(Bvalbytes)) // 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) // Write the state back to the ledger - err = stub.PutState(A, []byte(strconv.Itoa(Aval))) + err = ctx.GetStub().PutState(A, []byte(strconv.Itoa(Aval))) if err != nil { - return shim.Error(err.Error()) + return err } - err = stub.PutState(B, []byte(strconv.Itoa(Bval))) + err = ctx.GetStub().PutState(B, []byte(strconv.Itoa(Bval))) if err != nil { - return shim.Error(err.Error()) + return err } - return shim.Success(nil) + return nil } -// Deletes an entity from state -func (t *ABstore) delete(stub shim.ChaincodeStubInterface, args []string) pb.Response { - if len(args) != 1 { - return shim.Error("Incorrect number of arguments. Expecting 1") - } - - A := args[0] +// Delete an entity from state +func (t *ABstore) Delete(ctx contractapi.TransactionContextInterface, A string) error { // Delete the key from the state in ledger - err := stub.DelState(A) + err := ctx.GetStub().DelState(A) if err != nil { - return shim.Error("Failed to delete state") + return fmt.Errorf("Failed to delete state") } - return shim.Success(nil) + return nil } -// query callback representing the query of a chaincode -func (t *ABstore) query(stub shim.ChaincodeStubInterface, args []string) pb.Response { - var A string // Entities +// Query callback representing the query of a chaincode +func (t *ABstore) Query(ctx contractapi.TransactionContextInterface, A string) (string, error) { var err error - - if len(args) != 1 { - return shim.Error("Incorrect number of arguments. Expecting name of the person to query") - } - - A = args[0] - // Get the state from the ledger - Avalbytes, err := stub.GetState(A) + Avalbytes, err := ctx.GetStub().GetState(A) if err != nil { jsonResp := "{\"Error\":\"Failed to get state for " + A + "\"}" - return shim.Error(jsonResp) + return "", errors.New(jsonResp) } if Avalbytes == nil { jsonResp := "{\"Error\":\"Nil amount for " + A + "\"}" - return shim.Error(jsonResp) + return "", errors.New(jsonResp) } jsonResp := "{\"Name\":\"" + A + "\",\"Amount\":\"" + string(Avalbytes) + "\"}" fmt.Printf("Query Response:%s\n", jsonResp) - return shim.Success(Avalbytes) + return jsonResp, nil } func main() { - err := shim.Start(new(ABstore)) - if err != nil { - fmt.Printf("Error starting ABstore chaincode: %s", err) + cc,err:=contractapi.NewChaincode(new(ABstore)) + if err!=nil{ + panic(err.Error()) } + if err := cc.Start(); err != nil { + fmt.Printf("Error starting ABstore chaincode: %s", err) + } } diff --git a/chaincode/abstore/go/go.mod b/chaincode/abstore/go/go.mod index 781dc72bab..ecb10d1474 100644 --- a/chaincode/abstore/go/go.mod +++ b/chaincode/abstore/go/go.mod @@ -1,12 +1,5 @@ -module github.com/hyperledger/fabric-samples/chaincode/abstore/go +module github.com/Zzocker/fabric-samples/chaincode/abstore/go -go 1.12 +go 1.14 -require ( - github.com/hyperledger/fabric-chaincode-go v0.0.0-20190823162523-04390e015b85 - github.com/hyperledger/fabric-protos-go v0.0.0-20190821214336-621b908d5022 - golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7 // indirect - golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a // indirect - golang.org/x/text v0.3.2 // indirect - google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 // indirect -) +require github.com/hyperledger/fabric-contract-api-go v1.0.0 diff --git a/chaincode/abstore/go/go.sum b/chaincode/abstore/go/go.sum index bf8755123c..e2949e954c 100644 --- a/chaincode/abstore/go/go.sum +++ b/chaincode/abstore/go/go.sum @@ -1,10 +1,38 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h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= -honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= From d493f6a5ccec8abcdda6d759b2d1c0e813f6429c Mon Sep 17 00:00:00 2001 From: Pritam Singh Date: Wed, 8 Apr 2020 16:14:39 +0530 Subject: [PATCH 2/2] resolved the issue Signed-off-by: Pritam Singh --- chaincode/abstore/go/abstore.go | 8 ++++---- chaincode/abstore/go/go.mod | 4 ++-- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/chaincode/abstore/go/abstore.go b/chaincode/abstore/go/abstore.go index ac0e211940..9b35a22f46 100644 --- a/chaincode/abstore/go/abstore.go +++ b/chaincode/abstore/go/abstore.go @@ -121,15 +121,15 @@ func (t *ABstore) Query(ctx contractapi.TransactionContextInterface, A string) ( jsonResp := "{\"Name\":\"" + A + "\",\"Amount\":\"" + string(Avalbytes) + "\"}" fmt.Printf("Query Response:%s\n", jsonResp) - return jsonResp, nil + return string(Avalbytes), nil } func main() { - cc,err:=contractapi.NewChaincode(new(ABstore)) - if err!=nil{ + cc, err := contractapi.NewChaincode(new(ABstore)) + if err != nil { panic(err.Error()) } if err := cc.Start(); err != nil { fmt.Printf("Error starting ABstore chaincode: %s", err) - } + } } diff --git a/chaincode/abstore/go/go.mod b/chaincode/abstore/go/go.mod index ecb10d1474..7a4f7a7491 100644 --- a/chaincode/abstore/go/go.mod +++ b/chaincode/abstore/go/go.mod @@ -1,5 +1,5 @@ -module github.com/Zzocker/fabric-samples/chaincode/abstore/go +module github.com/hyperledger/fabric-samples/chaincode/abstore/go -go 1.14 +go 1.13 require github.com/hyperledger/fabric-contract-api-go v1.0.0