005鏈碼API學(xué)院：國(guó)內(nèi)職業(yè)教育領(lǐng)先品：參數(shù)

GetFunctionAndParameters提取調(diào)用鏈碼交易中的參數(shù)，其中第一個(gè)作為被調(diào)用的函數(shù)名funcfunc(stub*ChaincodeStub)GetFunctionAndParameters()(functionstring,#fn,args:=stub.GetFunctionAndParameters()fmt.Println(fn,args)#set["tom",GetStringArgs提取鏈碼交易的指定funcfunc(stub*ChaincodeStub)GetStringArgs()#args=stub.GetStringArgs()#賬本狀態(tài)交互PutState在賬本中添加或更新一對(duì)鍵funcfunc(stub*ChaincodeStub)PutState(keystring,value[]byte)err:=iferr!=nilfmt.Println("strPutStateerror:fmt.Println("strPutState}GetState負(fù)責(zé)查詢賬本，返回指定鍵的對(duì)funcfunc(stub*ChaincodeStub)GetState(keystring)([]byte,strValue,err:=iferr!=nilfmt.Println("strGetStateerror:}elsefmt.Printf("strvalue:%s}#str DelState刪除一對(duì)鍵funcfunc(stub*ChaincodeStub)DelState(keystring)err= 查詢指定范圍內(nèi)的鍵值，startKey為起始key，endKey為終止funcfunc(stub*ChaincodeStub)GetStateByRange(startKey,endKey(StateQueryIteratorInterface,err:=err=stub.PutState("str1",[]byte("err=stub.PutState("str2",[]byte("resultIterator,err:=stub.GetStateByRange("str",deferfmt.Println("-----start forresultIterator.HasNext()item,item,_:=resultIterator.Next()}fmt.Println("-----end -----startresultIterator----------endresultIterator----GetHistoryForKey返回某個(gè)鍵的歷史funcfunc(stub*ChaincodeStub)GetHistoryForKey(key(HistoryQueryIteratorInterface,historyIterator,err:=stub.GetHistoryForKey("str")deferhistoryIterator.Close()fmt.Println("-----start forresultIterator.HasNext()item,_:=historyIterator.Next()}fmt.Println("-----end 其他 給定一組屬性，將這些屬性組合起來(lái)構(gòu)造一個(gè)復(fù)funcfunc(stub[]string)(string,positeKey(objectTypestring,indexName:="sex~name"indexKey,err:=value:=[]byte{0x00}indexKey,err indexKey,err= 給定一個(gè)復(fù)合鍵，將其拆分為復(fù)合鍵所用的funcfunc(stub[]string,positeKey(compositeKeystring) 根據(jù)局部的復(fù)合鍵返回所有的匹配的funcfunc(stub*ChaincodeStub)positeKey(objectTypeattributes[]string)(StateQueryIteratorInterface,resultIterator,err=stub.Ge positeKey(indexName,[]strdeferfmt.Println("-----start forresultIterator.HasNext()item,_:=objectType,compositeKeyParts,erriferr!=nilreturn}fmt.Println("objectType:"+objectType)fmt.Println("sex:"+compositeKeyParts[0])fmt.Println("name:"+compositeKeyParts[1])}fmt.Println("-----end -----startresultIterator----objectType:sex~namesex:boyname:objectType:sex:namename:-----endresultIterator--- 對(duì)狀態(tài)數(shù)據(jù)庫(kù)進(jìn)行富查詢，僅有couchDB支funcfunc(stub*ChaincodeStub)GetQueryResult(query(StateQueryIteratorInterface,resultIterator,err=stub.GetQueryResult("{\"selector\":{\"sex\":\"boy\"}}")deferfmt.Println("-----start forresultIterator.HasNext(){item,_:=resultIterator.Next()}fmt.Println("-----end InvokeChaincode