func (t *SimpleChaincode) init(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var event string // Indicates whether event has happened. Initially 0
var eventVal int // State of event
var err error
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
// Initialize the chaincode
event = args[0]
eventVal, err = strconv.Atoi(args[1])
if err != nil {
return nil, errors.New("Expecting integer value for event status")
}
fmt.Printf("eventVal = %d\n", eventVal)
// Write the state to the ledger
err = stub.PutState(event, []byte(strconv.Itoa(eventVal)))
if err != nil {
return nil, err
}
return nil, nil
}
// Initialize entities to random variables in order to test ledger status consensus
func (t *SimpleChaincode) initRand(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var A, B string // Entities
var Aval, Bval int // Asset holdings
var err error
if len(args) != 4 {
return nil, errors.New("Incorrect number of arguments. Expecting 4")
}
// Initialize the chaincode
A = args[0]
Aval = rand.Intn(100)
B = args[1]
Bval = rand.Intn(100)
fmt.Printf("Aval = %d, Bval = %d\n", Aval, Bval)
// Write the state to the ledger
err = stub.PutState(A, []byte(strconv.Itoa(Aval)))
if err != nil {
return nil, err
}
err = stub.PutState(B, []byte(strconv.Itoa(Bval)))
if err != nil {
return nil, err
}
return nil, nil
}
func GetAllCPs(stub *shim.ChaincodeStub) ([]CP, error) {
var allCPs []CP
// Get list of all the keys
keysBytes, err := stub.GetState("PaperKeys")
if err != nil {
fmt.Println("Error retrieving paper keys")
return nil, errors.New("Error retrieving paper keys")
}
var keys []string
err = json.Unmarshal(keysBytes, &keys)
if err != nil {
fmt.Println("Error unmarshalling paper keys")
return nil, errors.New("Error unmarshalling paper keys")
}
// Get all the cps
for _, value := range keys {
cpBytes, err := stub.GetState(value)
var cp CP
err = json.Unmarshal(cpBytes, &cp)
if err != nil {
fmt.Println("Error retrieving cp " + value)
return nil, errors.New("Error retrieving cp " + value)
}
fmt.Println("Appending CP" + value)
allCPs = append(allCPs, cp)
}
return allCPs, nil
}
// ============================================================================================================================
// Init - reset all the things
// ============================================================================================================================
func (t *SimpleChaincode) init(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var Aval int
var err error
if len(args) != 1 {
return nil, errors.New("Incorrect number of arguments. Expecting 1")
}
// Initialize the chaincode
Aval, err = strconv.Atoi(args[0])
if err != nil {
return nil, errors.New("Expecting integer value for asset holding")
}
// Write the state to the ledger
err = stub.PutState("abc", []byte(strconv.Itoa(Aval))) //making a test var "abc", I find it handy to read/write to it right away to test the network
if err != nil {
return nil, err
}
var empty []string
jsonAsBytes, _ := json.Marshal(empty) //marshal an emtpy array of strings to clear the index
err = stub.PutState(marbleIndexStr, jsonAsBytes)
if err != nil {
return nil, err
}
return nil, nil
}
func (t *SimpleChaincode) transfer(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var v Vehicle
var err error
var bytes []byte
bytes, err = stub.GetState(args[0])
if err != nil {
return nil, errors.New("Error retrieving vehicle with v5cID = " + args[0])
}
err = json.Unmarshal(bytes, &v)
if err != nil {
return nil, errors.New("Corrupt vehicle record")
}
v.Owner = args[1]
bytes, err = json.Marshal(v)
if err != nil {
return nil, errors.New("Error creating vehicle record")
}
err = stub.PutState(v.V5cID, bytes)
if err != nil {
return nil, err
}
return nil, nil
}
/**
* Should allow us to query the value of the protected strings in the ledger
* Args:
* stub: The blockchain that holds the string we're want.
* strkey: The key under which the string is stored.
*/
func (t *SimpleChaincode) getstring(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var strkey string
var strvalBytes []byte // The actual value of the string
if(len(args) != 1) {
return nil, errors.New("Incorrect number of arguments. Expecting 1");
}
// Which string do we want?
strkey = args[0];
// Get the value of the string from the ledger
strvalBytes, err := stub.GetState(strkey)
if err != nil {
jsonResp := "{\"Error\": \"Failed to get state for " + strkey + "\"}"
return nil, errors.New(jsonResp)
}
if strvalBytes == nil {
jsonResp := "{\"Error\":\"Nil amount for " + strkey + "\"}"
return nil, errors.New(jsonResp)
}
// Add quotes to the string or it will cause an invalid json to be created.
strvalBytes = []byte(fmt.Sprintf("\"%s\"", string(strvalBytes)))
jsonResp := "{\"StringKey\":\"" + strkey + "\",\"Value\":\"" + string(strvalBytes) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return strvalBytes, nil
}
// Query callback representing the query of a chaincode
func (t *AssetManagementChaincode) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function != "query" {
return nil, errors.New("Invalid query function name. Expecting \"query\"")
}
var err error
if len(args) != 1 {
return nil, errors.New("Incorrect number of arguments. Expecting name of an asset to query")
}
// Who is the owner of the asset?
asset := args[0]
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 {
jsonResp := "{\"Error\":\"Failed retrieveing asset " + asset + ". Error " + err.Error() + ". \"}"
return nil, errors.New(jsonResp)
}
jsonResp := "{\"Owner\":\"" + string(row.Columns[1].GetBytes()) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return row.Columns[1].GetBytes(), nil
}
// Query callback representing the query of a chaincode
func (t *SimpleChaincode) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function == "getstring" {
return t.getstring(stub, args)
} else if function != "query" {
return nil, errors.New("Invalid query function name. Expecting \"query\"")
}
var A string // Entity
var Aval int // Asset holding
var err error
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
A = args[0]
Aval, err = strconv.Atoi(args[1])
if err != nil {
return nil, errors.New("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 nil, errors.New(jsonResp)
}
fmt.Printf("Something is wrong. This query should not have succeeded")
return nil, nil
}
/**
* Should allow us to query the value of the protected strings in the ledger
* Args:
* 0 strkey: The key under which the protected string is stored
*/
func (t *SimpleChaincode) getstring(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var strkey string // The key associated with the string we want to find
var strvalBytes []byte // The actual value of the string
if len(args) != 1 {
return nil, errors.New("Incorrect number of arguments. Expecting 1")
}
// Which string do we want?
strkey = args[0]
// Get the value of the string from the ledger
strvalBytes, err := stub.GetState(strkey)
if err != nil {
jsonResp := "{\"Error\": \"Failed to get state for " + strkey + "\"}"
return nil, errors.New(jsonResp)
}
if strvalBytes == nil {
jsonResp := "{\"Error\":\"Nil amount for " + strkey + "\"}"
return nil, errors.New(jsonResp)
}
jsonResp := "{\"StringKey\":\"" + strkey + "\", \"Value\":\"" + string(strvalBytes) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return strvalBytes, nil
}
// ============================================================================================================================
// findMarble4Trade - look for a matching marble that this user owns and return it
// ============================================================================================================================
func findMarble4Trade(stub *shim.ChaincodeStub, user string, color string, size int) (m Marble, err error) {
var fail Marble
fmt.Println("- start find marble 4 trade")
fmt.Println("looking for " + user + ", " + color + ", " + strconv.Itoa(size))
//get the marble index
marblesAsBytes, err := stub.GetState(marbleIndexStr)
if err != nil {
return fail, errors.New("Failed to get marble index")
}
var marbleIndex []string
json.Unmarshal(marblesAsBytes, &marbleIndex) //un stringify it aka JSON.parse()
for i := range marbleIndex { //iter through all the marbles
//fmt.Println("looking @ marble name: " + marbleIndex[i]);
marbleAsBytes, err := stub.GetState(marbleIndex[i]) //grab this marble
if err != nil {
return fail, errors.New("Failed to get marble")
}
res := Marble{}
json.Unmarshal(marbleAsBytes, &res) //un stringify it aka JSON.parse()
//fmt.Println("looking @ " + res.User + ", " + res.Color + ", " + strconv.Itoa(res.Size));
//check for user && color && size
if strings.ToLower(res.User) == strings.ToLower(user) && strings.ToLower(res.Color) == strings.ToLower(color) && res.Size == size {
fmt.Println("found a marble: " + res.Name)
fmt.Println("! end find marble 4 trade")
return res, nil
}
}
fmt.Println("- end find marble 4 trade - error")
return fail, errors.New("Did not find marble to use in this trade")
}
func (t *SimpleChaincode) init(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var A string // Entity
var Aval int // Asset holding
var err error
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
// Initialize the chaincode
A = args[0]
Aval, err = strconv.Atoi(args[1])
if err != nil {
return nil, errors.New("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 nil, err
}
return nil, nil
}
// ============================================================================================================================
// Set User Permissions
// ============================================================================================================================
func (t *SimpleChaincode) set_user_perms(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var err error
carAsBytes, err := stub.GetState(args[0])
if err != nil {
return nil, errors.New("Failed to get car profile")
}
res := Car{}
json.Unmarshal(carAsBytes, &res)
fmt.Println(res)
for i, perm := range res.Users {
if perm.UserId == args[1] { //find the correct user
res.Users[i].Permissions[0] = args[2] //set new perm, dsh - to do make this input as array of all perms
fmt.Println(res.Users[i].Permissions)
break
}
}
// Write the state back to the ledger
jsonAsBytes, _ := json.Marshal(res)
err = stub.PutState(args[0], jsonAsBytes)
if err != nil {
return nil, err
}
return nil, nil
}
// ============================================================================================================================
// Init Car
// ============================================================================================================================
func (t *SimpleChaincode) init_car(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var err error
if len(args) != 5 {
return nil, errors.New("Incorrect number of arguments. Expecting 5")
}
str := `{
"data": {
"vin": "` + args[0] + `",
"year": "` + args[1] + `"
"make": "` + args[2] + `",
"model": "` + args[3] + `",
"license": "-"
},
"users": [{
"userid": "` + args[4] + `",
"permissions":["owner"]
}]
}`
// Write the state back to the ledger
err = stub.PutState(args[0], []byte(str)) //store car with vin# as key
if err != nil {
return nil, err
}
t.remember_me(stub, args[0])
return nil, nil
}
// ============================================================================================================================
// Set User Permission on Marble
// ============================================================================================================================
func (t *SimpleChaincode) set_user(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var err error
// 0 1
// "name", "bob"
if len(args) < 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
fmt.Println("- start set user")
fmt.Println(args[0] + " - " + args[1])
marbleAsBytes, err := stub.GetState(args[0])
if err != nil {
return nil, errors.New("Failed to get thing")
}
res := Marble{}
json.Unmarshal(marbleAsBytes, &res) //un stringify it aka JSON.parse()
res.User = args[1] //change the user
jsonAsBytes, _ := json.Marshal(res)
err = stub.PutState(args[0], jsonAsBytes) //rewrite the marble with id as key
if err != nil {
return nil, err
}
fmt.Println("- end set user")
return nil, nil
}
func (t *SimpleChaincode) init(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var sum string // Sum of asset holdings across accounts. Initially 0
var sumVal int // Sum of holdings
var err error
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
// Initialize the chaincode
sum = args[0]
sumVal, err = strconv.Atoi(args[1])
if err != nil {
return nil, errors.New("Expecting integer value for sum")
}
fmt.Printf("sumVal = %d\n", sumVal)
// Write the state to the ledger
err = stub.PutState(sum, []byte(strconv.Itoa(sumVal)))
if err != nil {
return nil, err
}
return nil, nil
}
// Query callback representing the query of a chaincode
func (t *SimpleChaincode) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function != "query" {
return nil, errors.New("Invalid query function name. Expecting \"query\"")
}
var A string // Entities
var err error
if len(args) != 1 {
return nil, errors.New("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)
if err != nil {
jsonResp := "{\"Error\":\"Failed to get state for " + A + "\"}"
return nil, errors.New(jsonResp)
}
if Avalbytes == nil {
jsonResp := "{\"Error\":\"Nil amount for " + A + "\"}"
return nil, errors.New(jsonResp)
}
jsonResp := "{\"Name\":\"" + A + "\",\"Amount\":\"" + string(Avalbytes) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return Avalbytes, nil
}
// Query callback representing the query of a chaincode
func (t *systemChaincode) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function != "query" {
return nil, errors.New("Invalid query function name. Expecting \"query\"")
}
if len(args) != 1 {
return nil, errors.New("Incorrect number of arguments. Expecting 1")
}
key := args[0]
if key != system_validity_period_key {
return nil, errors.New("Incorrect key. Expecting " + system_validity_period_key)
}
// Get the state from the ledger
vp, err := stub.GetState(key)
if err != nil {
jsonResp := "{\"Error\":\"Failed to get state for " + key + "\"}"
return nil, errors.New(jsonResp)
}
if vp == nil {
jsonResp := "{\"Error\":\"Nil value for " + key + "\"}"
return nil, errors.New(jsonResp)
}
jsonResp := "{\"Name\":\"" + key + "\",\"Value\":\"" + string(vp) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return []byte(jsonResp), nil
}
func createTableThree(stub *shim.ChaincodeStub) error {
var columnDefsTableThree []*shim.ColumnDefinition
columnOneTableThreeDef := shim.ColumnDefinition{Name: "colOneTableThree",
Type: shim.ColumnDefinition_STRING, Key: true}
columnTwoTableThreeDef := shim.ColumnDefinition{Name: "colTwoTableThree",
Type: shim.ColumnDefinition_INT32, Key: false}
columnThreeTableThreeDef := shim.ColumnDefinition{Name: "colThreeTableThree",
Type: shim.ColumnDefinition_INT64, Key: false}
columnFourTableThreeDef := shim.ColumnDefinition{Name: "colFourTableFour",
Type: shim.ColumnDefinition_UINT32, Key: false}
columnFiveTableThreeDef := shim.ColumnDefinition{Name: "colFourTableFive",
Type: shim.ColumnDefinition_UINT64, Key: false}
columnSixTableThreeDef := shim.ColumnDefinition{Name: "colFourTableSix",
Type: shim.ColumnDefinition_BYTES, Key: false}
columnSevenTableThreeDef := shim.ColumnDefinition{Name: "colFourTableSeven",
Type: shim.ColumnDefinition_BOOL, Key: false}
columnDefsTableThree = append(columnDefsTableThree, &columnOneTableThreeDef)
columnDefsTableThree = append(columnDefsTableThree, &columnTwoTableThreeDef)
columnDefsTableThree = append(columnDefsTableThree, &columnThreeTableThreeDef)
columnDefsTableThree = append(columnDefsTableThree, &columnFourTableThreeDef)
columnDefsTableThree = append(columnDefsTableThree, &columnFiveTableThreeDef)
columnDefsTableThree = append(columnDefsTableThree, &columnSixTableThreeDef)
columnDefsTableThree = append(columnDefsTableThree, &columnSevenTableThreeDef)
return stub.CreateTable("tableThree", columnDefsTableThree)
}
// Query callback representing the query of a chaincode
func (t *SimpleChaincode) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function != "query" {
return nil, errors.New("Invalid query function name. Expecting \"query\"")
}
var sum string // Sum entity
var Aval, Bval, sumVal int // value of sum entity - to be computed
var err error
// Can query another chaincode within query, but cannot put state or invoke another chaincode (in transaction context)
if len(args) != 3 {
return nil, errors.New("Incorrect number of arguments. Expecting 3")
}
chaincodeUrl := args[0] // Expecting "github.com/openblockchain/obc-peer/openchain/example/chaincode/chaincode_example02"
chaincodeVersion := args[1] // Expecting "0.0.1"
sum = args[2]
// Query chaincode_example02
f := "query"
queryArgs := []string{"a"}
response, err := stub.QueryChaincode(chaincodeUrl, chaincodeVersion, f, queryArgs)
if err != nil {
errStr := fmt.Sprintf("Failed to query chaincode. Got error: %s", err.Error())
fmt.Printf(errStr)
return nil, errors.New(errStr)
}
Aval, err = strconv.Atoi(string(response))
if err != nil {
errStr := fmt.Sprintf("Error retrieving state from ledger for queried chaincode: %s", err.Error())
fmt.Printf(errStr)
return nil, errors.New(errStr)
}
queryArgs = []string{"b"}
response, err = stub.QueryChaincode(chaincodeUrl, chaincodeVersion, f, queryArgs)
if err != nil {
errStr := fmt.Sprintf("Failed to query chaincode. Got error: %s", err.Error())
fmt.Printf(errStr)
return nil, errors.New(errStr)
}
Bval, err = strconv.Atoi(string(response))
if err != nil {
errStr := fmt.Sprintf("Error retrieving state from ledger for queried chaincode: %s", err.Error())
fmt.Printf(errStr)
return nil, errors.New(errStr)
}
// Compute sum
sumVal = Aval + Bval
fmt.Printf("Query chaincode successful. Got sum %d\n", sumVal)
jsonResp := "{\"Name\":\"" + sum + "\",\"Value\":\"" + strconv.Itoa(sumVal) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return []byte(strconv.Itoa(sumVal)), nil
}
// Initialize the in the ledger (this needs to be run only once!!!!)
func (t *systemChaincode) init(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var vp int64 = 0
// Initialize the validity period in the ledger (this needs to be run only once!!!!)
err := stub.PutState(system_validity_period_key, []byte(strconv.FormatInt(vp, 10)))
if err != nil {
return nil, err
}
return nil, nil
}
func (t *Vehicle) get_attribute(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
state, err := stub.GetState(args[0])
if err != nil {
return nil, errors.New("Failed to get state")
}
jsonResp := "{\"" + args[0] + "\":\"" + string(state) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return []byte(jsonResp), nil
}
func (t *SimpleChaincode) test(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var err error
// Write the state back to the ledger
str := "hey there"
err = stub.PutState("test", []byte(str))
if err != nil {
return nil, err
}
return nil, nil
}
// ============================================================================================================================
// Get Permissions - get permissions form the car profile
// ============================================================================================================================
func (t *SimpleChaincode) get_permissions(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var err error
carAsBytes, err := stub.GetState(args[0])
if err != nil {
return nil, errors.New("Failed to get car profile")
}
res := Car{}
json.Unmarshal(carAsBytes, &res)
fmt.Println(res)
jsonAsBytes, _ := json.Marshal(res.Users)
return jsonAsBytes, nil
}
func (t *Vehicle) scrap_merchant_to_scrap(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
statusBytes, err := stub.GetState("Status")
status, err := strconv.Atoi(string(statusBytes))
if err != nil {
return nil, errors.New("Failed to get state")
}
scrappedBytes, err := stub.GetState("Scrapped")
scrapped, err := strconv.ParseBool(string(scrappedBytes))
if err != nil {
return nil, errors.New("Failed to get state")
}
ownerBytes, err := stub.GetState("Owner")
owner := string(ownerBytes)
if err != nil {
return nil, errors.New("Failed to get state")
}
if !scrapped && owner == "Cray Bros (London) Ltd" && status == 4 {
scrapped = true
} else {
return nil, errors.New("Permission denied")
}
err = stub.PutState("Scrapped", []byte(strconv.FormatBool(scrapped)))
return nil, nil
}
func (t *AssetManagementChaincode) isCaller(stub *shim.ChaincodeStub, certificate []byte) (bool, error) {
// In order to enforce access control, we require that the
// metadata contains the signature under the signing key corresponding
// to the verification key inside certificate of
// the payload of the transaction (namely, function name and args) and
// the transaction binding (to avoid copying attacks)
// Verify \sigma=Sign(certificate.sk, tx.Payload||tx.Binding) against certificate.vk
// \sigma is in the metadata
sigma, err := stub.GetCallerMetadata()
if err != nil {
return false, errors.New("Failed getting metadata")
}
payload, err := stub.GetPayload()
if err != nil {
return false, errors.New("Failed getting payload")
}
binding, err := stub.GetBinding()
if err != nil {
return false, errors.New("Failed getting binding")
}
myLogger.Debug("passed certificate [% x]", certificate)
myLogger.Debug("passed sigma [% x]", sigma)
myLogger.Debug("passed payload [% x]", payload)
myLogger.Debug("passed binding [% x]", binding)
return stub.VerifySignature(
certificate,
sigma,
append(payload, binding...),
)
}
func createTableOne(stub *shim.ChaincodeStub) error {
// Create table one
var columnDefsTableOne []*shim.ColumnDefinition
columnOneTableOneDef := shim.ColumnDefinition{Name: "colOneTableOne",
Type: shim.ColumnDefinition_STRING, Key: true}
columnTwoTableOneDef := shim.ColumnDefinition{Name: "colTwoTableOne",
Type: shim.ColumnDefinition_INT32, Key: false}
columnThreeTableOneDef := shim.ColumnDefinition{Name: "colThreeTableOne",
Type: shim.ColumnDefinition_INT32, Key: false}
columnDefsTableOne = append(columnDefsTableOne, &columnOneTableOneDef)
columnDefsTableOne = append(columnDefsTableOne, &columnTwoTableOneDef)
columnDefsTableOne = append(columnDefsTableOne, &columnThreeTableOneDef)
return stub.CreateTable("tableOne", columnDefsTableOne)
}
func (t *Vehicle) update_model(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
modelBytes, err := stub.GetState("Model")
model := string(modelBytes)
if err != nil {
return nil, errors.New("Failed to get state")
}
statusBytes, err := stub.GetState("Status")
status, err := strconv.Atoi(string(statusBytes))
if err != nil {
return nil, errors.New("Failed to get state")
}
ownerBytes, err := stub.GetState("Owner")
owner := string(ownerBytes)
if err != nil {
return nil, errors.New("Failed to get state")
}
if status == 1 && owner == "Toyota" {
model = args[0]
} else {
return nil, errors.New("Permission denied")
}
err = stub.PutState("Model", []byte(model))
return nil, nil
}
//==============================================================================================================================
// create_log - Invokes the function of event_code chaincode with the name 'chaincodeName' to log an
// event.
//==============================================================================================================================
func (t *Chaincode) create_log(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
chaincode_name := "398f2e9a632d17bfc54f259f581818448a1f7b654901ce1648a66c36f0003b2ece440382e585d6b7dac8ee010f2b4fae29bda3135cf76d9c3895cacec1ffbeb4"
chaincode_function := "create_log"
chaincode_arguments := args
_, err := stub.InvokeChaincode(chaincode_name, chaincode_function, chaincode_arguments)
if err != nil {
return nil, errors.New("Failed to invoke vehicle_log_code")
}
return nil, nil
}
func (t *Vehicle) lease_company_to_private(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
statusBytes, err := stub.GetState("Status")
status, err := strconv.Atoi(string(statusBytes))
if err != nil {
return nil, errors.New("Failed to get state")
}
ownerBytes, err := stub.GetState("Owner")
owner := string(ownerBytes)
if err != nil {
return nil, errors.New("Failed to get state")
}
scrappedBytes, err := stub.GetState("Scrapped")
scrapped, err := strconv.ParseBool(string(scrappedBytes))
if err != nil {
return nil, errors.New("Failed to get state")
}
if status == 2 && owner == "LeaseCan" && !scrapped {
owner = args[0]
} else {
return nil, errors.New("Permission denied")
}
err = stub.PutState("Owner", []byte(owner))
return nil, nil
}
// ============================================================================================================================
// Init TEST
// ============================================================================================================================
func (t *SimpleChaincode) init_test(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var err error
str := `{"userid": "test", "fullname": "mr test"}`
// Write the state back to the ledger
err = stub.PutState("test", []byte(str))
if err != nil {
return nil, err
}
t.remember_me(stub, "test")
return nil, nil
}