// ============================================================================================================================
// 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
}
// 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 != systemValidityPeriodKey {
return nil, errors.New("Incorrect key. Expecting " + systemValidityPeriodKey)
}
// 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
}
//==============================================================================================================================
// General Functions
//==============================================================================================================================
// get_ecert - Takes the name passed and calls out to the REST API for HyperLedger to retrieve the ecert
// for that user. Returns the ecert as retrived including html encoding.
//==============================================================================================================================
func (t *SimpleChaincode) get_ecert(stub *shim.ChaincodeStub, name string) ([]byte, error) {
var cert ECertResponse
peer_address, err := stub.GetState("Peer_Address")
if err != nil {
return nil, errors.New("Error retrieving peer address")
}
response, err := http.Get("http://" + string(peer_address) + "/registrar/" + name + "/ecert") // Calls out to the HyperLedger REST API to get the ecert of the user with that name
if err != nil {
return nil, errors.New("Error calling ecert API")
}
defer response.Body.Close()
contents, err := ioutil.ReadAll(response.Body) // Read the response from the http callout into the variable contents
if err != nil {
return nil, errors.New("Could not read body")
}
err = json.Unmarshal(contents, &cert)
if err != nil {
return nil, errors.New("Could not retrieve ecert for user: " + name)
}
return []byte(string(cert.OK)), nil
}
//==============================================================================================================================
// Invoke Functions
//==============================================================================================================================
// add_number - Retrieves the current number value stored in the world state and adds a number passed by the invoker to it
// and updates Number to the new value in the world state
//==============================================================================================================================
func (t *SimpleChaincode) add_number(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
//Args
// 0
// Value to add
adder, _ := strconv.Atoi(args[0])
bytes, err := stub.GetState("Number")
if err != nil {
return nil, errors.New("Unable to get number")
}
number, _ := strconv.Atoi(string(bytes))
newNumber := number + adder
toPut := strconv.Itoa(newNumber)
err = stub.PutState("Number", []byte(toPut))
if err != nil {
return nil, errors.New("Unable to put the state")
}
return nil, 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) get_all_slots(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
slotsIndexBytes, err := stub.GetState(slotIndexStr)
if err != nil {
return nil, errors.New("Failed to get slots index")
}
var slotIndex []string
err = json.Unmarshal(slotsIndexBytes, &slotIndex)
if err != nil {
return nil, errors.New("Could not marshal slot indexes")
}
var slots []Slot
for _, slotId := range slotIndex {
bytes, err := stub.GetState(slotId)
if err != nil {
return nil, errors.New("Not able to get slot")
}
var s Slot
err = json.Unmarshal(bytes, &s)
slots = append(slots, s)
}
slotsJson, err := json.Marshal(slots)
if err != nil {
return nil, errors.New("Failed to marshal slots to JSON")
}
return slotsJson, nil
}
// Query callback representing the query of a chaincode
func (t *SampleSysCC) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function != "getval" {
return nil, errors.New("Invalid query function name. Expecting \"getval\"")
}
var key string // Entities
var err error
if len(args) != 1 {
return nil, errors.New("Incorrect number of arguments. Expecting key to query")
}
key = args[0]
// Get the state from the ledger
valbytes, err := stub.GetState(key)
if err != nil {
jsonResp := "{\"Error\":\"Failed to get state for " + key + "\"}"
return nil, errors.New(jsonResp)
}
if valbytes == nil {
jsonResp := "{\"Error\":\"Nil val for " + key + "\"}"
return nil, errors.New(jsonResp)
}
return valbytes, nil
}
// Invoke gets the supplied key and if it exists, updates the key with the newly
// supplied value.
func (t *SampleSysCC) Invoke(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
var key, val string // Entities
if len(args) != 2 {
return nil, errors.New("need 2 args (key and a value)")
}
// Initialize the chaincode
key = args[0]
val = args[1]
_, err := stub.GetState(key)
if err != nil {
jsonResp := "{\"Error\":\"Failed to get val for " + key + "\"}"
return nil, errors.New(jsonResp)
}
// Write the state to the ledger
err = stub.PutState(key, []byte(val))
if err != nil {
return nil, err
}
return nil, nil
}
// "create": true -> create new ID, false -> append the id
func append_id(stub *shim.ChaincodeStub, indexStr string, id string, create bool) ([]byte, error) {
indexAsBytes, err := stub.GetState(indexStr)
if err != nil {
return nil, errors.New("Failed to get " + indexStr)
}
fmt.Println(indexStr + " retrieved")
// Unmarshal the index
var tmpIndex []string
json.Unmarshal(indexAsBytes, &tmpIndex)
fmt.Println(indexStr + " unmarshalled")
// Create new id
var newId = id
if create {
newId += strconv.Itoa(len(tmpIndex) + 1)
}
// append the new id to the index
tmpIndex = append(tmpIndex, newId)
jsonAsBytes, _ := json.Marshal(tmpIndex)
err = stub.PutState(indexStr, jsonAsBytes)
if err != nil {
return nil, errors.New("Error storing new " + indexStr + " into ledger")
}
return []byte(newId), nil
}
func (t *SimpleChaincode) get_all_devices(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
devicesIndexBytes, err := stub.GetState(deviceIndexStr)
if err != nil {
return nil, errors.New("Failed to get devices index")
}
var deviceIndex []string
err = json.Unmarshal(devicesIndexBytes, &deviceIndex)
if err != nil {
return nil, errors.New("Could not marshal device indexes")
}
var devices []Device
for _, deviceId := range deviceIndex {
bytes, err := stub.GetState(deviceId)
if err != nil {
return nil, errors.New("Not able to get device")
}
var d Device
err = json.Unmarshal(bytes, &d)
devices = append(devices, d)
}
devicesJson, err := json.Marshal(devices)
if err != nil {
return nil, errors.New("Failed to marshal devices to JSON")
}
return devicesJson, nil
}
func (t *SimpleChaincode) get_all_bids(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
bidIndexBytes, err := stub.GetState(bidIndexStr)
if err != nil {
return nil, errors.New("Failed to get bids index")
}
var bidIndex []string
err = json.Unmarshal(bidIndexBytes, &bidIndex)
if err != nil {
return nil, errors.New("Could not marshal bid indexes")
}
var bids []Bid
for _, bidId := range bidIndex {
bytes, err := stub.GetState(bidId)
if err != nil {
return nil, errors.New("Not able to get bid")
}
var b Bid
err = json.Unmarshal(bytes, &b)
bids = append(bids, b)
}
bidsJson, err := json.Marshal(bids)
if err != nil {
return nil, errors.New("Failed to marshal bids to JSON")
}
return bidsJson, nil
}
// ============================================================================================================================
// Delete - remove a key/value pair from state
// ============================================================================================================================
func (t *SimpleChaincode) Delete(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
if len(args) != 1 {
return nil, errors.New("Incorrect number of arguments. Expecting 1")
}
name := args[0]
err := stub.DelState(name) //remove the key from chaincode state
if err != nil {
return nil, errors.New("Failed to delete state")
}
//get the marble index
marblesAsBytes, err := stub.GetState(marbleIndexStr)
if err != nil {
return nil, errors.New("Failed to get marble index")
}
var marbleIndex []string
json.Unmarshal(marblesAsBytes, &marbleIndex) //un stringify it aka JSON.parse()
//remove marble from index
for i, val := range marbleIndex {
fmt.Println(strconv.Itoa(i) + " - looking at " + val + " for " + name)
if val == name { //find the correct marble
fmt.Println("found marble")
marbleIndex = append(marbleIndex[:i], marbleIndex[i+1:]...) //remove it
for x := range marbleIndex { //debug prints...
fmt.Println(string(x) + " - " + marbleIndex[x])
}
break
}
}
jsonAsBytes, _ := json.Marshal(marbleIndex) //save new index
err = stub.PutState(marbleIndexStr, jsonAsBytes)
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
}
func (t *SampleChaincode) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if len(args) != 1 {
return nil, errors.New("<name>")
}
return stub.GetState(args[0])
}
// Query function
func (t *EventSender) Query(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
b, err := stub.GetState("noevents")
if err != nil {
return nil, errors.New("Failed to get state")
}
jsonResp := "{\"NoEvents\":\"" + string(b) + "\"}"
return []byte(jsonResp), nil
}
func (t *AssetManagementChaincode) assign(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
fmt.Println("Assigning Asset...")
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
asset := args[0]
owner, err := base64.StdEncoding.DecodeString(args[1])
if err != nil {
fmt.Printf("Error decoding [%v] \n", err)
return nil, errors.New("Failed decodinf owner")
}
// Recover the role that is allowed to make assignments
assignerRole, err := stub.GetState("assignerRole")
if err != nil {
fmt.Printf("Error getting role [%v] \n", err)
return nil, errors.New("Failed fetching assigner role")
}
callerRole, err := stub.ReadCertAttribute("role")
if err != nil {
fmt.Printf("Error reading attribute [%v] \n", err)
return nil, fmt.Errorf("Failed fetching caller role. Error was [%v]", err)
}
caller := string(callerRole[:])
assigner := string(assignerRole[:])
if caller != assigner {
fmt.Printf("Caller is not assigner - caller %v assigner %v\n", caller, assigner)
return nil, fmt.Errorf("The caller does not have the rights to invoke assign. Expected role [%v], caller role [%v]", assigner, caller)
}
account, err := attr.GetValueFrom("account", owner)
if err != nil {
fmt.Printf("Error reading account [%v] \n", err)
return nil, fmt.Errorf("Failed fetching recipient account. Error was [%v]", err)
}
// Register assignment
myLogger.Debugf("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: account}}},
})
if !ok && err == nil {
fmt.Println("Error inserting row")
return nil, errors.New("Asset was already assigned.")
}
return nil, err
}
// Transaction makes payment of X units from A to B
func (t *SimpleChaincode) Invoke(stub *shim.ChaincodeStub, function string, args []string) ([]byte, error) {
if function == "delete" {
// Deletes an entity from its state
return t.delete(stub, args)
}
var A, B string // Entities
var Aval, Bval int // Asset holdings
var X int // Transaction value
var err error
if len(args) != 3 {
return nil, errors.New("Incorrect number of arguments. Expecting 3")
}
A = args[0]
B = args[1]
// 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 nil, errors.New("Failed to get state")
}
if Avalbytes == nil {
return nil, errors.New("Entity not found")
}
Aval, _ = strconv.Atoi(string(Avalbytes))
Bvalbytes, err := stub.GetState(B)
if err != nil {
return nil, errors.New("Failed to get state")
}
if Bvalbytes == nil {
return nil, errors.New("Entity not found")
}
Bval, _ = strconv.Atoi(string(Bvalbytes))
// Perform the execution
X, err = strconv.Atoi(args[2])
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)))
if err != nil {
return nil, err
}
err = stub.PutState(B, []byte(strconv.Itoa(Bval)))
if err != nil {
return nil, err
}
return nil, nil
}
func (t *SimpleChaincode) get_account(stub *shim.ChaincodeStub, username string) ([]byte, error) {
bytes, err := stub.GetState(username)
if err != nil {
return nil, errors.New("Could not retrieve information for this user")
}
return bytes, nil
}
// ============================================================================================================================
// Init Marble - create a new marble, store into chaincode state
// ============================================================================================================================
func (t *SimpleChaincode) init_marble(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
var err error
// 0 1 2 3
// "asdf", "blue", "35", "bob"
if len(args) != 4 {
return nil, errors.New("Incorrect number of arguments. Expecting 4")
}
fmt.Println("- start init marble")
if len(args[0]) <= 0 {
return nil, errors.New("1st argument must be a non-empty string")
}
if len(args[1]) <= 0 {
return nil, errors.New("2nd argument must be a non-empty string")
}
if len(args[2]) <= 0 {
return nil, errors.New("3rd argument must be a non-empty string")
}
if len(args[3]) <= 0 {
return nil, errors.New("4th argument must be a non-empty string")
}
size, err := strconv.Atoi(args[2])
if err != nil {
return nil, errors.New("3rd argument must be a numeric string")
}
color := strings.ToLower(args[1])
user := strings.ToLower(args[3])
str := `{"name": "` + args[0] + `", "color": "` + color + `", "size": ` + strconv.Itoa(size) + `, "user": "******"}`
err = stub.PutState(args[0], []byte(str)) //store marble with id as key
if err != nil {
return nil, err
}
//get the marble index
marblesAsBytes, err := stub.GetState(marbleIndexStr)
if err != nil {
return nil, errors.New("Failed to get marble index")
}
var marbleIndex []string
json.Unmarshal(marblesAsBytes, &marbleIndex) //un stringify it aka JSON.parse()
//append
marbleIndex = append(marbleIndex, args[0]) //add marble name to index list
fmt.Println("! marble index: ", marbleIndex)
jsonAsBytes, _ := json.Marshal(marbleIndex)
err = stub.PutState(marbleIndexStr, jsonAsBytes) //store name of marble
fmt.Println("- end init marble")
return nil, nil
}
//==============================================================================================================================
// Query Functions
//==============================================================================================================================
// get_number - Retrieves the current number value stored in the world state and returns it
//
//==============================================================================================================================
func (t *SimpleChaincode) get_number(stub *shim.ChaincodeStub, args []string) ([]byte, error) {
bytes, err := stub.GetState("Number")
if err != nil {
return nil, errors.New("Unable to get number")
}
return bytes, nil
}
func getTransactionById(stub *shim.ChaincodeStub, id string) (Transaction, []byte, error) {
var transaction Transaction
tsBytes, err := stub.GetState("transaction" + id)
if err != nil {
fmt.Println("Error retrieving cpBytes")
}
err = json.Unmarshal(tsBytes, &transaction)
if err != nil {
fmt.Println("Error unmarshalling centerBank")
}
return transaction, tsBytes, nil
}
func getBankById(stub *shim.ChaincodeStub, id string) (Bank, []byte, error) {
var bank Bank
cbBytes, err := stub.GetState("bank" + id)
if err != nil {
fmt.Println("Error retrieving cpBytes")
}
err = json.Unmarshal(cbBytes, &bank)
if err != nil {
fmt.Println("Error unmarshalling centerBank")
}
return bank, cbBytes, nil
}
func getCompanyById(stub *shim.ChaincodeStub, id string) (Company, []byte, error) {
var company Company
cpBytes, err := stub.GetState("company" + id)
if err != nil {
fmt.Println("Error retrieving cpBytes")
}
err = json.Unmarshal(cpBytes, &company)
if err != nil {
fmt.Println("Error unmarshalling centerBank")
}
return company, cpBytes, nil
}
func getCenterBank(stub *shim.ChaincodeStub) (CenterBank, []byte, error) {
var centerBank CenterBank
cbBytes, err := stub.GetState("centerBank")
if err != nil {
fmt.Println("Error retrieving cbBytes")
}
err = json.Unmarshal(cbBytes, ¢erBank)
if err != nil {
fmt.Println("Error unmarshalling centerBank")
}
return centerBank, cbBytes, nil
}
func getHomeByAddress(stub *shim.ChaincodeStub, address string) (Home,[]byte, error) {
var home Home
homeBytes,err := stub.GetState(address)
if err != nil {
fmt.Println("Error retrieving home")
}
err = json.Unmarshal(homeBytes, &home)
if err != nil {
fmt.Println("Error unmarshalling home")
}
return home,homeBytes, nil
}
func(t *SimpleChaincode) getExpressOrderById(stub *shim.ChaincodeStub,id string)(ExpressOrder,[]byte,error){
var expressOrder ExpressOrder
eoBytes,err := stub.GetState("expressOrder"+id)
if err != nil{
fmt.Println("Error retrieving data")
}
err = json.Unmarshal(eoBygtes,&ExpessOrder)
if err != nil{
fmt.Println("Error unmarshalling data")
}
return expressOrder,eoByes,nil
}
func(t *SimpleChaincode) getExpress(stub *shim.ChaincodeStub)(Express,[]byte,error){
var express Express
exBytes,err := stub.GetState("Express")
if err != nil{
fmt.Println("Error retrieving data")
}
err = json.Unmarshal(exBytes,&express)
if err != nil {
fmt.Println("Error unmarshalling data")
}
return express,exBytes,nil
}
func(t *SimpleChaincode) getUserByAddress(stub *shim.ChaincodeStub,address string)(User,[]byte,error){
var user User
userBytes,err := stub.GetState(address)
if err != nil{
fmt.Println("Error retrieving data")
}
err = json.Unmarshal(userBytes,&user)
if err != nil {
fmt.Println("Error unmarshalling data")
}
return user,userBytes,nil
}
func(t *SimpleChaincode) getExpressPointerByAddress(stub *shim.ChaincodeStub,address string)(ExpressPointer,[]byte,error){
var expressPointer ExpressPointer
epBytes,err := stub.GetState(address)
if err != nil{
fmt.Println("Error retrieving data")
}
err = json.Unmarshal(epBytes,&expressPointer)
if err != nil {
fmt.Println("Error unmarshalling data")
}
return expressPointer,epBytes,nil
}
// status implements the `status` query. If the -checkStatus flag was passed
// as false, then we do not check for the array having been created, and we
// assume that the length and count obtained from the state are correct. This
// is a debug-only setting.
func (c *counters) status(stub *shim.ChaincodeStub, args []string) (val []byte, err error) {
c.debugf("status : Entry : checkStatus = %v", c.checkStatus)
// Run down the list of arrays, pulling their state into our memory
arrays := map[string][]uint64{}
for _, name := range args {
if c.checkStatus {
if _, ok := c.length[name]; !ok {
c.errorf("status : Array '%s' has never been created", name)
}
}
b, err := stub.GetState(name)
if err != nil {
c.criticalf("status : GetState() for array '%s' failed : %s", name, err)
}
length := len(b) / 8
array := make([]uint64, length)
arrays[name] = array
err = binary.Read(bytes.NewReader(b), binary.LittleEndian, &array)
if err != nil {
c.criticalf("status : Error converting %d bytes of array %s to uint64 : %s", len(b), name, err)
}
c.debugf("status : Array %s[%d] (%d bytes)", name, length, len(b))
}
// Now create the result
res := ""
for _, name := range args {
if res != "" {
res += " "
}
actualLength := uint64(len(arrays[name]))
actualCount := arrays[name][0]
var expectedLength, expectedCount uint64
if c.checkStatus {
expectedLength = c.length[name]
expectedCount = c.count[name]
} else {
expectedLength = actualLength
expectedCount = actualCount
}
res += fmt.Sprintf("%d %d %d %d", expectedLength, actualLength, expectedCount, actualCount)
}
c.debugf("status : Final status : %s", res)
return []byte(res), nil
}