Example #1
0
func (t *AssetManagementChaincode) transfer(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
	if len(args) != 2 {
		return nil, errors.New("Incorrect number of arguments. Expecting 2")
	}

	asset := args[0]
	newOwner := []byte(args[1])

	// Verify the identity of the caller
	// Only the owner can transfer one of his assets
	var columns []shim.Column
	col1 := shim.Column{Value: &shim.Column_String_{String_: asset}}
	columns = append(columns, col1)

	row, err := stub.GetRow("AssetsOwnership", columns)
	if err != nil {
		return nil, fmt.Errorf("Failed retrieveing asset [%s]: [%s]", asset, err)
	}

	prvOwner := row.Columns[1].GetBytes()
	myLogger.Debug("Previous owener of [%s] is [% x]", asset, prvOwner)
	if len(prvOwner) == 0 {
		return nil, fmt.Errorf("Invalid previous owner. Nil")
	}

	// Verify ownership
	ok, err := t.isCaller(stub, prvOwner)
	if err != nil {
		return nil, errors.New("Failed checking asset owner identity")
	}
	if !ok {
		return nil, errors.New("The caller is not the owner of the asset")
	}

	// At this point, the proof of ownership is valid, then register transfer
	err = stub.DeleteRow(
		"AssetsOwnership",
		[]shim.Column{shim.Column{Value: &shim.Column_String_{String_: asset}}},
	)
	if err != nil {
		return nil, errors.New("Failed deliting row.")
	}

	_, err = stub.InsertRow(
		"AssetsOwnership",
		shim.Row{
			Columns: []*shim.Column{
				&shim.Column{Value: &shim.Column_String_{String_: asset}},
				&shim.Column{Value: &shim.Column_Bytes{Bytes: newOwner}},
			},
		})
	if err != nil {
		return nil, errors.New("Failed inserting row.")
	}

	return nil, nil
}
Example #2
0
func (t *AssetManagementChaincode) assign(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
	if len(args) != 2 {
		return nil, errors.New("Incorrect number of arguments. Expecting 2")
	}

	asset := args[0]
	owner := []byte(args[1])

	// Verify the identity of the caller
	// Only an administrator can invoker assign
	adminCertificate, err := stub.GetState("admin")
	if err != nil {
		return nil, errors.New("Failed fetching admin identity")
	}

	ok, err := t.isCaller(stub, adminCertificate)
	if err != nil {
		return nil, errors.New("Failed checking admin identity")
	}
	if !ok {
		return nil, errors.New("The caller is not an administrator")
	}

	// Register assignment
	myLogger.Debug("New owner of [%s] is [% x]", asset, owner)

	ok, err = stub.InsertRow("AssetsOwnership", shim.Row{
		Columns: []*shim.Column{
			&shim.Column{Value: &shim.Column_String_{String_: asset}},
			&shim.Column{Value: &shim.Column_Bytes{Bytes: owner}}},
	})

	if !ok && err == nil {
		return nil, errors.New("Asset was already assigned.")
	}

	return nil, err
}
Example #3
0
// Run callback representing the invocation of a chaincode
// This chaincode will manage two accounts A and B and will transfer X units from A to B upon invoke
func (t *SimpleChaincode) Run(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {

	switch function {

	case "insertRowTableOne":
		if len(args) < 3 {
			return nil, errors.New("insertTableOne failed. Must include 3 column values")
		}

		col1Val := args[0]
		col2Int, err := strconv.ParseInt(args[1], 10, 32)
		if err != nil {
			return nil, errors.New("insertTableOne failed. arg[1] must be convertable to int32")
		}
		col2Val := int32(col2Int)
		col3Int, err := strconv.ParseInt(args[2], 10, 32)
		if err != nil {
			return nil, errors.New("insertTableOne failed. arg[2] must be convertable to int32")
		}
		col3Val := int32(col3Int)

		var columns []*shim.Column
		col1 := shim.Column{Value: &shim.Column_String_{String_: col1Val}}
		col2 := shim.Column{Value: &shim.Column_Int32{Int32: col2Val}}
		col3 := shim.Column{Value: &shim.Column_Int32{Int32: col3Val}}
		columns = append(columns, &col1)
		columns = append(columns, &col2)
		columns = append(columns, &col3)

		row := shim.Row{columns}
		ok, err := stub.InsertRow("tableOne", row)
		if err != nil {
			return nil, fmt.Errorf("insertTableOne operation failed. %s", err)
		}
		if !ok {
			return nil, errors.New("insertTableOne operation failed. Row with given key already exists")
		}

	case "insertRowTableTwo":
		if len(args) < 4 {
			return nil, errors.New("insertRowTableTwo failed. Must include 4 column values")
		}

		col1Val := args[0]
		col2Int, err := strconv.ParseInt(args[1], 10, 32)
		if err != nil {
			return nil, errors.New("insertRowTableTwo failed. arg[1] must be convertable to int32")
		}
		col2Val := int32(col2Int)
		col3Int, err := strconv.ParseInt(args[2], 10, 32)
		if err != nil {
			return nil, errors.New("insertRowTableTwo failed. arg[2] must be convertable to int32")
		}
		col3Val := int32(col3Int)
		col4Val := args[3]

		var columns []*shim.Column
		col1 := shim.Column{Value: &shim.Column_String_{String_: col1Val}}
		col2 := shim.Column{Value: &shim.Column_Int32{Int32: col2Val}}
		col3 := shim.Column{Value: &shim.Column_Int32{Int32: col3Val}}
		col4 := shim.Column{Value: &shim.Column_String_{String_: col4Val}}
		columns = append(columns, &col1)
		columns = append(columns, &col2)
		columns = append(columns, &col3)
		columns = append(columns, &col4)

		row := shim.Row{columns}
		ok, err := stub.InsertRow("tableTwo", row)
		if err != nil {
			return nil, fmt.Errorf("insertRowTableTwo operation failed. %s", err)
		}
		if !ok {
			return nil, errors.New("insertRowTableTwo operation failed. Row with given key already exists")
		}

	case "insertRowTableThree":
		if len(args) < 7 {
			return nil, errors.New("insertRowTableThree failed. Must include 7 column values")
		}

		col1Val := args[0]

		col2Int, err := strconv.ParseInt(args[1], 10, 32)
		if err != nil {
			return nil, errors.New("insertRowTableThree failed. arg[1] must be convertable to int32")
		}
		col2Val := int32(col2Int)

		col3Val, err := strconv.ParseInt(args[2], 10, 64)
		if err != nil {
			return nil, errors.New("insertRowTableThree failed. arg[2] must be convertable to int64")
		}

		col4Uint, err := strconv.ParseUint(args[3], 10, 32)
		if err != nil {
			return nil, errors.New("insertRowTableThree failed. arg[3] must be convertable to uint32")
		}
		col4Val := uint32(col4Uint)

		col5Val, err := strconv.ParseUint(args[4], 10, 64)
		if err != nil {
			return nil, errors.New("insertRowTableThree failed. arg[4] must be convertable to uint64")
		}

		col6Val := []byte(args[5])

		col7Val, err := strconv.ParseBool(args[6])
		if err != nil {
			return nil, errors.New("insertRowTableThree failed. arg[6] must be convertable to bool")
		}

		var columns []*shim.Column
		col1 := shim.Column{Value: &shim.Column_String_{String_: col1Val}}
		col2 := shim.Column{Value: &shim.Column_Int32{Int32: col2Val}}
		col3 := shim.Column{Value: &shim.Column_Int64{Int64: col3Val}}
		col4 := shim.Column{Value: &shim.Column_Uint32{Uint32: col4Val}}
		col5 := shim.Column{Value: &shim.Column_Uint64{Uint64: col5Val}}
		col6 := shim.Column{Value: &shim.Column_Bytes{Bytes: col6Val}}
		col7 := shim.Column{Value: &shim.Column_Bool{Bool: col7Val}}
		columns = append(columns, &col1)
		columns = append(columns, &col2)
		columns = append(columns, &col3)
		columns = append(columns, &col4)
		columns = append(columns, &col5)
		columns = append(columns, &col6)
		columns = append(columns, &col7)

		row := shim.Row{columns}
		ok, err := stub.InsertRow("tableThree", row)
		if err != nil {
			return nil, fmt.Errorf("insertRowTableThree operation failed. %s", err)
		}
		if !ok {
			return nil, errors.New("insertRowTableThree operation failed. Row with given key already exists")
		}

	case "deleteRowTableOne":
		if len(args) < 1 {
			return nil, errors.New("deleteRowTableOne failed. Must include 1 key value")
		}

		col1Val := args[0]
		var columns []shim.Column
		col1 := shim.Column{Value: &shim.Column_String_{String_: col1Val}}
		columns = append(columns, col1)

		err := stub.DeleteRow("tableOne", columns)
		if err != nil {
			return nil, fmt.Errorf("deleteRowTableOne operation failed. %s", err)
		}

	case "replaceRowTableOne":
		if len(args) < 3 {
			return nil, errors.New("replaceRowTableOne failed. Must include 3 column values")
		}

		col1Val := args[0]
		col2Int, err := strconv.ParseInt(args[1], 10, 32)
		if err != nil {
			return nil, errors.New("replaceRowTableOne failed. arg[1] must be convertable to int32")
		}
		col2Val := int32(col2Int)
		col3Int, err := strconv.ParseInt(args[2], 10, 32)
		if err != nil {
			return nil, errors.New("replaceRowTableOne failed. arg[2] must be convertable to int32")
		}
		col3Val := int32(col3Int)

		var columns []*shim.Column
		col1 := shim.Column{Value: &shim.Column_String_{String_: col1Val}}
		col2 := shim.Column{Value: &shim.Column_Int32{Int32: col2Val}}
		col3 := shim.Column{Value: &shim.Column_Int32{Int32: col3Val}}
		columns = append(columns, &col1)
		columns = append(columns, &col2)
		columns = append(columns, &col3)

		row := shim.Row{columns}
		ok, err := stub.ReplaceRow("tableOne", row)
		if err != nil {
			return nil, fmt.Errorf("replaceRowTableOne operation failed. %s", err)
		}
		if !ok {
			return nil, errors.New("replaceRowTableOne operation failed. Row with given key does not exist")
		}

	case "deleteAndRecreateTableOne":

		err := stub.DeleteTable("tableOne")
		if err != nil {
			return nil, fmt.Errorf("deleteAndRecreateTableOne operation failed. Error deleting table. %s", err)
		}

		err = createTableOne(stub)
		if err != nil {
			return nil, fmt.Errorf("deleteAndRecreateTableOne operation failed. Error creating table. %s", err)
		}

		return nil, nil

	case "init":

		// Create table one
		err := createTableOne(stub)
		if err != nil {
			return nil, fmt.Errorf("Error creating table one during init. %s", err)
		}

		// Create table two
		err = createTableTwo(stub)
		if err != nil {
			return nil, fmt.Errorf("Error creating table two during init. %s", err)
		}

		// Create table three
		err = createTableThree(stub)
		if err != nil {
			return nil, fmt.Errorf("Error creating table three during init. %s", err)
		}

	default:
		return nil, errors.New("Unsupported operation")
	}
	return nil, nil
}