// Invoke function
func (t *EventSender) Invoke(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
b, err := stub.GetState("noevents")
if err != nil {
return nil, errors.New("Failed to get state")
}
noevts, _ := strconv.Atoi(string(b))
tosend := "Event " + string(b)
for _, s := range args {
tosend = tosend + "," + s
}
err = stub.PutState("noevents", []byte(strconv.Itoa(noevts+1)))
if err != nil {
return nil, err
}
err = stub.SetEvent("evtsender", []byte(tosend))
if err != nil {
return nil, err
}
return nil, nil
}
// Transaction makes payment of X units from A to B
func (t *ChaincodeExample) MakePayment(stub shim.ChaincodeStubInterface, param *example02.PaymentParams) error {
var err error
// Get the state from the ledger
src, err := t.GetState(stub, param.PartySrc)
if err != nil {
return err
}
dst, err := t.GetState(stub, param.PartyDst)
if err != nil {
return err
}
// Perform the execution
X := int(param.Amount)
src = src - X
dst = dst + X
fmt.Printf("Aval = %d, Bval = %d\n", src, dst)
// Write the state back to the ledger
err = stub.PutState(param.PartySrc, []byte(strconv.Itoa(src)))
if err != nil {
return err
}
err = stub.PutState(param.PartyDst, []byte(strconv.Itoa(dst)))
if err != nil {
return err
}
return nil
}
// Invoke gets the supplied key and if it exists, updates the key with the newly
// supplied value.
func (t *SampleSysCC) Invoke(stub shim.ChaincodeStubInterface, 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
}
// Transaction makes payment of X units from A to B
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface, 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])
if err != nil {
return nil, errors.New("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)))
if err != nil {
return nil, err
}
err = stub.PutState(B, []byte(strconv.Itoa(Bval)))
if err != nil {
return nil, err
}
return nil, nil
}
// ============================================================================================================================
// Set User Permission on Marble
// ============================================================================================================================
func (t *SimpleChaincode) set_user(stub shim.ChaincodeStubInterface, 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
}
// Invoke has two functions
// put - takes two arguements, a key and value, and stores them in the state
// remove - takes one argument, a key, and removes if from the state
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
switch function {
case "put":
if len(args) < 2 {
return nil, errors.New("put operation must include two arguments, a key and value")
}
key := args[0]
value := args[1]
err := stub.PutState(key, []byte(value))
if err != nil {
fmt.Printf("Error putting state %s", err)
return nil, fmt.Errorf("put operation failed. Error updating state: %s", err)
}
return nil, nil
case "remove":
if len(args) < 1 {
return nil, errors.New("remove operation must include one argument, a key")
}
key := args[0]
err := stub.DelState(key)
if err != nil {
return nil, fmt.Errorf("remove operation failed. Error updating state: %s", err)
}
return nil, nil
default:
return nil, errors.New("Unsupported operation")
}
}
// ============================================================================================================================
// Delete - remove a key/value pair from state
// ============================================================================================================================
func (t *SimpleChaincode) Delete(stub shim.ChaincodeStubInterface, 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
}
// Init takes two arguments, a string and int. The string will be a key with
// the int as a value.
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) ([]byte, error) {
var sum string // Sum of asset holdings across accounts. Initially 0
var sumVal int // Sum of holdings
var err error
_, args := stub.GetFunctionAndParameters()
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
}
// Init initialization
func (t *AssetManagementChaincode) Init(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
myLogger.Info("[AssetManagementChaincode] Init")
if len(args) != 0 {
return nil, errors.New("Incorrect number of arguments. Expecting 0")
}
// Create ownership table
err := stub.CreateTable("AssetsOwnership", []*shim.ColumnDefinition{
&shim.ColumnDefinition{Name: "Asset", Type: shim.ColumnDefinition_STRING, Key: true},
&shim.ColumnDefinition{Name: "Owner", Type: shim.ColumnDefinition_BYTES, Key: false},
})
if err != nil {
return nil, fmt.Errorf("Failed creating AssetsOnwership table, [%v]", err)
}
// Set the role of the users that are allowed to assign assets
// The metadata will contain the role of the users that are allowed to assign assets
assignerRole, err := stub.GetCallerMetadata()
fmt.Printf("Assiger role is %v\n", string(assignerRole))
if err != nil {
return nil, fmt.Errorf("Failed getting metadata, [%v]", err)
}
if len(assignerRole) == 0 {
return nil, errors.New("Invalid assigner role. Empty.")
}
stub.PutState("assignerRole", assignerRole)
return nil, nil
}
// Init method will be called during deployment.
// The deploy transaction metadata is supposed to contain the administrator cert
func (t *AssetManagementChaincode) Init(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
myLogger.Debug("Init Chaincode...")
if len(args) != 0 {
return nil, errors.New("Incorrect number of arguments. Expecting 0")
}
// Create ownership table
err := stub.CreateTable("AssetsOwnership", []*shim.ColumnDefinition{
&shim.ColumnDefinition{Name: "Asset", Type: shim.ColumnDefinition_STRING, Key: true},
&shim.ColumnDefinition{Name: "Owner", Type: shim.ColumnDefinition_BYTES, Key: false},
})
if err != nil {
return nil, errors.New("Failed creating AssetsOnwership table.")
}
// Set the admin
// The metadata will contain the certificate of the administrator
adminCert, err := stub.GetCallerMetadata()
if err != nil {
myLogger.Debug("Failed getting metadata")
return nil, errors.New("Failed getting metadata.")
}
if len(adminCert) == 0 {
myLogger.Debug("Invalid admin certificate. Empty.")
return nil, errors.New("Invalid admin certificate. Empty.")
}
myLogger.Debug("The administrator is [%x]", adminCert)
stub.PutState("admin", adminCert)
myLogger.Debug("Init Chaincode...done")
return nil, nil
}
// Invoke invokes another chaincode - chaincode_example02, upon receipt of an event and changes event state
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
var event string // Event entity
var eventVal string // State of event
var err error
var amount int
event = args[0]
eventVal = args[1]
chainCodeToCall := args[2] // Get the chaincode to call from the ledger
if eventVal == "middleSchool" {
amount = 2000
} else {
amount = 5000
}
// 转账操作
invokeArgs := util.ToChaincodeArgs("transferAcc", args[3], args[4], strconv.Itoa(amount))
response, err := stub.InvokeChaincode(chainCodeToCall, invokeArgs)
if err != nil {
errStr := fmt.Sprintf("Failed to invoke chaincode. Got error: %s", err.Error())
fmt.Printf(errStr)
return nil, errors.New(errStr)
}
fmt.Printf("Invoke chaincode successful. Got response %s", string(response))
// Write the event state back to the ledger
err = stub.PutState(event, []byte(args[1]))
if err != nil {
return nil, err
}
return nil, nil
}
// Init takes a string and int. These are stored as a key/value pair in the state
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) ([]byte, error) {
var A string // Entity
var Aval int // Asset holding
var err error
_, args := stub.GetFunctionAndParameters()
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
}
func (t *SimpleChaincode) query(stub shim.ChaincodeStubInterface, 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")
}
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
}
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface, function string, 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, err = strconv.Atoi(args[1])
if err != nil {
return nil, errors.New("Expecting integer value for asset holding")
}
B = args[2]
Bval, err = strconv.Atoi(args[3])
if err != nil {
return nil, errors.New("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)))
if err != nil {
return nil, err
}
err = stub.PutState(B, []byte(strconv.Itoa(Bval)))
if err != nil {
return nil, err
}
return nil, nil
}
// Init function
func (t *EventSender) Init(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
err := stub.PutState("noevents", []byte("0"))
if err != nil {
return nil, err
}
return nil, nil
}
// Invoke queries another chaincode and updates its own state
func (t *SimpleChaincode) invoke(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
var sum string // Sum entity
var Aval, Bval, sumVal int // value of sum entity - to be computed
var err error
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
chaincodeURL := args[0] // Expecting "github.com/hyperledger/fabric/core/example/chaincode/chaincode_example02"
sum = args[1]
// Query chaincode_example02
f := "query"
queryArgs := util.ToChaincodeArgs(f, "a")
response, err := stub.InvokeChaincode(chaincodeURL, 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 = util.ToChaincodeArgs(f, "b")
response, err = stub.InvokeChaincode(chaincodeURL, 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
// Write sumVal back to the ledger
err = stub.PutState(sum, []byte(strconv.Itoa(sumVal)))
if err != nil {
return nil, err
}
fmt.Printf("Invoke chaincode successful. Got sum %d\n", sumVal)
return []byte(strconv.Itoa(sumVal)), nil
}
// Invoke gets the supplied key and if it exists, updates the key with the newly
// supplied value.
func (t *SampleSysCC) Invoke(stub shim.ChaincodeStubInterface) ([]byte, error) {
f, args := stub.GetFunctionAndParameters()
switch f {
case "putval":
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))
return nil, err
case "getval":
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
default:
jsonResp := "{\"Error\":\"Unknown functon " + f + "\"}"
return nil, errors.New(jsonResp)
}
}
// ============================================================================================================================
// Write - write variable into chaincode state
// ============================================================================================================================
func (t *SimpleChaincode) Write(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
var name, value string // Entities
var err error
fmt.Println("running write()")
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2. name of the variable and value to set")
}
name = args[0] //rename for funsies
value = args[1]
err = stub.PutState(name, []byte(value)) //write the variable into the chaincode state
if err != nil {
return nil, err
}
return nil, nil
}
func (t *Attributes2State) setStateToAttributes(stub shim.ChaincodeStubInterface, args []string) error {
attrHandler, err := attr.NewAttributesHandlerImpl(stub)
if err != nil {
return err
}
for _, att := range args {
fmt.Println("Writing attribute " + att)
attVal, err := attrHandler.GetValue(att)
if err != nil {
return err
}
err = stub.PutState(att, attVal)
if err != nil {
return err
}
}
return nil
}
// Invoke invokes another chaincode - chaincode_example02, upon receipt of an event and changes event state
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
var event string // Event entity
var eventVal int // State of event
var err error
if len(args) != 2 {
return nil, errors.New("Incorrect number of arguments. Expecting 2")
}
event = args[0]
eventVal, err = strconv.Atoi(args[1])
if err != nil {
return nil, errors.New("Expected integer value for event state change")
}
if eventVal != 1 {
fmt.Printf("Unexpected event. Doing nothing\n")
return nil, nil
}
// Get the chaincode to call from the ledger
chainCodeToCall := t.GetChaincodeToCall()
f := "invoke"
invokeArgs := util.ToChaincodeArgs(f, "a", "b", "10")
response, err := stub.InvokeChaincode(chainCodeToCall, invokeArgs)
if err != nil {
errStr := fmt.Sprintf("Failed to invoke chaincode. Got error: %s", err.Error())
fmt.Printf(errStr)
return nil, errors.New(errStr)
}
fmt.Printf("Invoke chaincode successful. Got response %s", string(response))
// Write the event state back to the ledger
err = stub.PutState(event, []byte(strconv.Itoa(eventVal)))
if err != nil {
return nil, err
}
return nil, nil
}
func (t *RBACChaincode) write(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
if len(args) != 1 {
return nil, errors.New("Incorrect number of arguments. Expecting 1")
}
value := args[0]
myLogger.Debug("Write [%s]", value)
// Verify that the invoker has the 'writer' role
ok, _, err := t.hasInvokerRole(stub, "writer")
if err != nil {
return nil, fmt.Errorf("Failed checking role [%s]", err)
}
if !ok {
return nil, errors.New("The invoker does not have the required roles.")
}
return nil, stub.PutState("state", []byte(value))
}
//Invoke makes increment counter
func (t *AuthorizableCounterChaincode) increment(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
val, err := stub.ReadCertAttribute("position")
fmt.Printf("Position => %v error %v \n", string(val), err)
isOk, _ := stub.VerifyAttribute("position", []byte("Software Engineer")) // Here the ABAC API is called to verify the attribute, just if the value is verified the counter will be incremented.
if isOk {
counter, err := stub.GetState("counter")
if err != nil {
return nil, err
}
var cInt int
cInt, err = strconv.Atoi(string(counter))
if err != nil {
return nil, err
}
cInt = cInt + 1
counter = []byte(strconv.Itoa(cInt))
stub.PutState("counter", counter)
}
return nil, nil
}
// ============================================================================================================================
// Remove Open Trade - close an open trade
// ============================================================================================================================
func (t *SimpleChaincode) remove_trade(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
var err error
// 0
//[data.id]
if len(args) < 1 {
return nil, errors.New("Incorrect number of arguments. Expecting 1")
}
fmt.Println("- start remove trade")
timestamp, err := strconv.ParseInt(args[0], 10, 64)
if err != nil {
return nil, errors.New("1st argument must be a numeric string")
}
//get the open trade struct
tradesAsBytes, err := stub.GetState(openTradesStr)
if err != nil {
return nil, errors.New("Failed to get opentrades")
}
var trades AllTrades
json.Unmarshal(tradesAsBytes, &trades) //un stringify it aka JSON.parse()
for i := range trades.OpenTrades { //look for the trade
//fmt.Println("looking at " + strconv.FormatInt(trades.OpenTrades[i].Timestamp, 10) + " for " + strconv.FormatInt(timestamp, 10))
if trades.OpenTrades[i].Timestamp == timestamp {
fmt.Println("found the trade")
trades.OpenTrades = append(trades.OpenTrades[:i], trades.OpenTrades[i+1:]...) //remove this trade
jsonAsBytes, _ := json.Marshal(trades)
err = stub.PutState(openTradesStr, jsonAsBytes) //rewrite open orders
if err != nil {
return nil, err
}
break
}
}
fmt.Println("- end remove trade")
return nil, nil
}
// Init takes two arguements, a string and int. These are stored in the key/value pair in the state
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface, function string, 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)
err = stub.PutState(event, []byte(strconv.Itoa(eventVal)))
if err != nil {
return nil, err
}
return nil, nil
}
// ============================================================================================================================
// Init - reset all the things
// ============================================================================================================================
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface, function string, 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
}
var trades AllTrades
jsonAsBytes, _ = json.Marshal(trades) //clear the open trade struct
err = stub.PutState(openTradesStr, jsonAsBytes)
if err != nil {
return nil, err
}
return nil, nil
}
// Transaction makes payment of X units from A to B
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
if function == "delete" {
// Deletes an entity from its state
return t.delete(stub, args)
}
if function == "createAccNO" {
accNO := args[0]
var amount int
var err error
if 1 == len(args) {
amount = 0
} else {
amount, err = strconv.Atoi(args[1])
if err != nil {
return nil, errors.New("Expecting integer value for asset holding")
}
}
err = stub.PutState(accNO, []byte(strconv.Itoa(amount)))
if err != nil {
return nil, err
}
}
if function == "transferAcc" {
if len(args) != 3 {
return nil, errors.New("Incorrect number of arguments. Expecting 3")
}
srcAcc := args[0] // 转出户名
tarAcc := args[1] // 转入户名
amount, err := strconv.Atoi(args[2]) // 金额
// 获取A的余额
srcAccvalbytes, err := stub.GetState(srcAcc)
if err != nil {
return nil, errors.New("Failed to get state")
}
if srcAccvalbytes == nil {
return nil, errors.New("Entity not found")
}
srcAccVal, _ := strconv.Atoi(string(srcAccvalbytes))
// 获取B的月
tarAccvalbytes, err := stub.GetState(tarAcc)
if err != nil {
return nil, errors.New("Failed to get state")
}
if tarAccvalbytes == nil {
return nil, errors.New("Entity not found")
}
tarAccVal, _ := strconv.Atoi(string(tarAccvalbytes))
srcAccVal -= amount
tarAccVal += amount
// Write the state back to the ledger
err = stub.PutState(srcAcc, []byte(strconv.Itoa(srcAccVal)))
if err != nil {
return nil, err
}
err = stub.PutState(tarAcc, []byte(strconv.Itoa(tarAccVal)))
if err != nil {
return nil, err
}
}
if function == "ECashPrinter" {
accNO := args[0] // 转出户名
amount, err := strconv.Atoi(args[1]) // 金额
// 获取A的余额
accValbytes, err := stub.GetState(accNO)
if err != nil {
return nil, errors.New("Failed to get state")
}
if accValbytes == nil {
return nil, errors.New("Entity not found")
}
accVal, _ := strconv.Atoi(string(accValbytes))
accVal += amount
// Write the state back to the ledger
err = stub.PutState(accNO, []byte(strconv.Itoa(accVal)))
if err != nil {
return nil, err
}
}
return nil, nil
}
// ============================================================================================================================
// Clean Up Open Trades - make sure open trades are still possible, remove choices that are no longer possible, remove trades that have no valid choices
// ============================================================================================================================
func cleanTrades(stub shim.ChaincodeStubInterface) (err error) {
var didWork = false
fmt.Println("- start clean trades")
//get the open trade struct
tradesAsBytes, err := stub.GetState(openTradesStr)
if err != nil {
return errors.New("Failed to get opentrades")
}
var trades AllTrades
json.Unmarshal(tradesAsBytes, &trades) //un stringify it aka JSON.parse()
fmt.Println("# trades " + strconv.Itoa(len(trades.OpenTrades)))
for i := 0; i < len(trades.OpenTrades); { //iter over all the known open trades
fmt.Println(strconv.Itoa(i) + ": looking at trade " + strconv.FormatInt(trades.OpenTrades[i].Timestamp, 10))
fmt.Println("# options " + strconv.Itoa(len(trades.OpenTrades[i].Willing)))
for x := 0; x < len(trades.OpenTrades[i].Willing); { //find a marble that is suitable
fmt.Println("! on next option " + strconv.Itoa(i) + ":" + strconv.Itoa(x))
_, e := findMarble4Trade(stub, trades.OpenTrades[i].User, trades.OpenTrades[i].Willing[x].Color, trades.OpenTrades[i].Willing[x].Size)
if e != nil {
fmt.Println("! errors with this option, removing option")
didWork = true
trades.OpenTrades[i].Willing = append(trades.OpenTrades[i].Willing[:x], trades.OpenTrades[i].Willing[x+1:]...) //remove this option
x--
} else {
fmt.Println("! this option is fine")
}
x++
fmt.Println("! x:" + strconv.Itoa(x))
if x >= len(trades.OpenTrades[i].Willing) { //things might have shifted, recalcuate
break
}
}
if len(trades.OpenTrades[i].Willing) == 0 {
fmt.Println("! no more options for this trade, removing trade")
didWork = true
trades.OpenTrades = append(trades.OpenTrades[:i], trades.OpenTrades[i+1:]...) //remove this trade
i--
}
i++
fmt.Println("! i:" + strconv.Itoa(i))
if i >= len(trades.OpenTrades) { //things might have shifted, recalcuate
break
}
}
if didWork {
fmt.Println("! saving open trade changes")
jsonAsBytes, _ := json.Marshal(trades)
err = stub.PutState(openTradesStr, jsonAsBytes) //rewrite open orders
if err != nil {
return err
}
} else {
fmt.Println("! all open trades are fine")
}
fmt.Println("- end clean trades")
return nil
}
// ============================================================================================================================
// Perform Trade - close an open trade and move ownership
// ============================================================================================================================
func (t *SimpleChaincode) perform_trade(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
var err error
// 0 1 2 3 4 5
//[data.id, data.closer.user, data.closer.name, data.opener.user, data.opener.color, data.opener.size]
if len(args) < 6 {
return nil, errors.New("Incorrect number of arguments. Expecting 6")
}
fmt.Println("- start close trade")
timestamp, err := strconv.ParseInt(args[0], 10, 64)
if err != nil {
return nil, errors.New("1st argument must be a numeric string")
}
size, err := strconv.Atoi(args[5])
if err != nil {
return nil, errors.New("6th argument must be a numeric string")
}
//get the open trade struct
tradesAsBytes, err := stub.GetState(openTradesStr)
if err != nil {
return nil, errors.New("Failed to get opentrades")
}
var trades AllTrades
json.Unmarshal(tradesAsBytes, &trades) //un stringify it aka JSON.parse()
for i := range trades.OpenTrades { //look for the trade
fmt.Println("looking at " + strconv.FormatInt(trades.OpenTrades[i].Timestamp, 10) + " for " + strconv.FormatInt(timestamp, 10))
if trades.OpenTrades[i].Timestamp == timestamp {
fmt.Println("found the trade")
marbleAsBytes, err := stub.GetState(args[2])
if err != nil {
return nil, errors.New("Failed to get thing")
}
closersMarble := Marble{}
json.Unmarshal(marbleAsBytes, &closersMarble) //un stringify it aka JSON.parse()
//verify if marble meets trade requirements
if closersMarble.Color != trades.OpenTrades[i].Want.Color || closersMarble.Size != trades.OpenTrades[i].Want.Size {
msg := "marble in input does not meet trade requriements"
fmt.Println(msg)
return nil, errors.New(msg)
}
marble, e := findMarble4Trade(stub, trades.OpenTrades[i].User, args[4], size) //find a marble that is suitable from opener
if e == nil {
fmt.Println("! no errors, proceeding")
t.set_user(stub, []string{args[2], trades.OpenTrades[i].User}) //change owner of selected marble, closer -> opener
t.set_user(stub, []string{marble.Name, args[1]}) //change owner of selected marble, opener -> closer
trades.OpenTrades = append(trades.OpenTrades[:i], trades.OpenTrades[i+1:]...) //remove trade
jsonAsBytes, _ := json.Marshal(trades)
err = stub.PutState(openTradesStr, jsonAsBytes) //rewrite open orders
if err != nil {
return nil, err
}
}
}
}
fmt.Println("- end close trade")
return nil, nil
}
// ============================================================================================================================
// Init Marble - create a new marble, store into chaincode state
// ============================================================================================================================
func (t *SimpleChaincode) init_marble(stub shim.ChaincodeStubInterface, 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")
}
//input sanitation
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")
}
name := args[0]
color := strings.ToLower(args[1])
user := strings.ToLower(args[3])
size, err := strconv.Atoi(args[2])
if err != nil {
return nil, errors.New("3rd argument must be a numeric string")
}
//check if marble already exists
marbleAsBytes, err := stub.GetState(name)
if err != nil {
return nil, errors.New("Failed to get marble name")
}
res := Marble{}
json.Unmarshal(marbleAsBytes, &res)
if res.Name == name {
fmt.Println("This marble arleady exists: " + name)
fmt.Println(res)
return nil, errors.New("This marble arleady exists") //all stop a marble by this name exists
}
//build the marble json string manually
str := `{"name": "` + name + `", "color": "` + color + `", "size": ` + strconv.Itoa(size) + `, "user": "******"}`
err = stub.PutState(name, []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, name) //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
}
// ============================================================================================================================
// Open Trade - create an open trade for a marble you want with marbles you have
// ============================================================================================================================
func (t *SimpleChaincode) open_trade(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
var err error
var will_size int
var trade_away Description
// 0 1 2 3 4 5 6
//["bob", "blue", "16", "red", "16"] *"blue", "35*
if len(args) < 5 {
return nil, errors.New("Incorrect number of arguments. Expecting like 5?")
}
if len(args)%2 == 0 {
return nil, errors.New("Incorrect number of arguments. Expecting an odd number")
}
size1, err := strconv.Atoi(args[2])
if err != nil {
return nil, errors.New("3rd argument must be a numeric string")
}
open := AnOpenTrade{}
open.User = args[0]
open.Timestamp = makeTimestamp() //use timestamp as an ID
open.Want.Color = args[1]
open.Want.Size = size1
fmt.Println("- start open trade")
jsonAsBytes, _ := json.Marshal(open)
err = stub.PutState("_debug1", jsonAsBytes)
for i := 3; i < len(args); i++ { //create and append each willing trade
will_size, err = strconv.Atoi(args[i+1])
if err != nil {
msg := "is not a numeric string " + args[i+1]
fmt.Println(msg)
return nil, errors.New(msg)
}
trade_away = Description{}
trade_away.Color = args[i]
trade_away.Size = will_size
fmt.Println("! created trade_away: " + args[i])
jsonAsBytes, _ = json.Marshal(trade_away)
err = stub.PutState("_debug2", jsonAsBytes)
open.Willing = append(open.Willing, trade_away)
fmt.Println("! appended willing to open")
i++
}
//get the open trade struct
tradesAsBytes, err := stub.GetState(openTradesStr)
if err != nil {
return nil, errors.New("Failed to get opentrades")
}
var trades AllTrades
json.Unmarshal(tradesAsBytes, &trades) //un stringify it aka JSON.parse()
trades.OpenTrades = append(trades.OpenTrades, open) //append to open trades
fmt.Println("! appended open to trades")
jsonAsBytes, _ = json.Marshal(trades)
err = stub.PutState(openTradesStr, jsonAsBytes) //rewrite open orders
if err != nil {
return nil, err
}
fmt.Println("- end open trade")
return nil, nil
}