ibm blockchain tutorial

the file transaction pointer ???? Gettxlocbyblocknumtrannum (blocknum uint64, trannum uint64) (* filelocpointer, error) // obtain the file transaction pointer ???? Getblocklocbytxid (txid string) (* filelocpointer, error) // obtain the file block pointer ???? Gettxvalidationcodebytxid (txid string) (peer. txvalidationcode, error) // obtain the transaction verification code based on the transaction ID} // code in common/ledger/blkstorage/fsblkstorage/blockindex. Go6.2. blockindex struct The bloc

(10000000000000000, "Ether") 2. "0.01" The basic unit of ether coins the smallest unit of ether coins is Wei, which is also the default unit of the command line. Then, every 1000 coins are entered into one unit, which is 1 in sequence. kwei (1000 Wei) 2. mwei (1000 Kwei) 3. gwei (1000 mwei) 4. szabo (1000 GWEI) 5. finney (1000 Szabo) 6. ether (1000 Finney) is simply 1 ether = 1000000000000000000 Wei (that is why we transferred 0.01 etherecoins in the previous chapter, but the results show a lon

Brother blockchain getting started tutorial ETH source code analysis p2p-udp.go source code analysis () The Network Discovery Protocol of P2P uses the kademlia protocol to process node discovery of the network. Node search and node update. Kademlia protocol uses UDP protocol for network communication. Read this part of the code. We recommend that you first look at the introduction of the kademlia protocol i

, which is unexpectedly because log is actually stored in the blockchain and is not stored in state trie, the State provides log processing, using several functions based on the following. Strange is not to see how to delete the information inside the logs, if not deleted, should be more accumulated. TODO Logs DeleteThe prepare function is executed at the beginning of the transaction execution.The Addlog function is executed by the VM during the execu

Package Mainimport ("Errors" "FMT" "Math" "StrConv" "Strings" "Github.com/buger/jsonparser" "github.com/levigross/ Grequests ") Const MIN = 0.000000000001func isequal (f1, F2 float64) bool {if F1 The effect is as follows:Brother even the blockchain starter to master tutorial Basic development through the interface query XRP coin situation

() ???????? Lastjobsendtime + kminingnotifyinterval_ ???? {???????? Sharedptr. Rbegin ()->second;???????? Sendminingnotify (Exjob);????}}Jobrepository::jobrepository (const char kafkabrokers,???? Const string filelastnotifytime,???? Server Server):Running(true),Kafkaconsumer(kafkabrokers, Kafka_topic_stratumJOB, 0/patition/),Server(server), Filelastnotifytime(Filelastnotifytime),Kmaxjobslifetime(300),Kminingnotifyinterval(+),//Todo:make as config argLastjobsendtime(0){???? ASSERT (Kminingnotify

Brother even blockchain tutorial Open-ethereum-pool Ethereum mine Pool source Analysis Unlocker moduleOpen-ethereum-pool Ethereum Mine Pool-unlocker moduleUnlocker module ConfigurationJson"Unlocker": {????" Enabled ": false,????" Poolfee ": 1.0,????" Poolfeeaddress ":" ",????" Donate ": True,????" Depth ": 120,????" Immaturedepth ": 20,????" Keeptxfees ": false,????" Interval ":" 10m ",????" Daemon ":" http

',earnBigint (20) not null default '0 ',created_atTimestamp null default null,updated_atTimestamp null default null,Unique keypuid_hour(puid,hour),Keyhour(hour)) Engine = InnoDB default charset = utf8; Drop table if existsstats_workers_day;Create Tablestats_workers_day(puidINT (11) not null,worker_idBigint (20) not null,dayINT (11) not null,share_acceptBigint (20) not null default '0 ',share_rejectBigint (20) not null default '0 ',reject_rateDouble not null default '0 ',scoreDecimal (35,25) not

, mspid string) Error // load the local mspfunc getlocalmsp () MSP from the specified directory. MSP // retrieve MSP. newbccspmsp () Create bccspmsp instance func getlocalsigningidentityorpanic () MSP. signingidentity // getlocalmsp (). getdefaultsigningidentity () // code in MSP/MGMT. go Func loadlocalmsp (DIR string, bccspconfig * factory. factoryopts, mspid string) error code: Conf, err: = MSP. getlocalmspconfig (Dir, bccspconfig, mspid) // obtain the local MSP configuration and write it to M

process to write dead or randomly generated parameters into the JSON file, that is, the above fileCreate the core code of the account: (Accounts.keystore.keystore_passphrase.go)The Encryptkey method inFuncencryptkey (Key key,authstring,scryptn,scryptpint) ([]byte,error)Where key is an encrypted account, including ID, public private key, addressAuth is the password entered by the userSCRYPTN, is the n in the scrypt algorithmP in the Scryptp,scrypt algorithmDerivedkey, err: = Scrypt. Key (Autharr

Source: IBM Tutorial Download SAX is what. The standard used to read and manipulate XML files is the Document Object model (Doc object model,dom). Unfortunately, the DOM method involves reading the entire file and storing the file in a tree structure, which can be inefficient, slow, and resource-intensive. An alternative technique is simple APIs for XML, or SAX. SAX allows you to

the container). Clicking on the Advanced option will show the apps that have been created on your personal Bluemix center, and selecting the corresponding application can be bound to the container.The larger picture is as follows:Last step, click Create! Bluemix automatically configures your container and binds your application as required. Final run interface results view:You can see the private ip/public IP that the container runs, as well as the ports used, the applications/services that are

The following articles mainly introduce the basic tutorial of SQL coding optimization for the IBM DB2 database. The importance of such a specific query is that the more important the query is, you may need to optimize indexes by creating indexes. If you are coding the query that the CIO is running every day, make sure it provides the best performance. Therefore, it is important to create an index for this s

: input Broker name, the corresponding queue manager name, and the executable group name, and then press finishto start the creation. after the creation is complete, the new the Broker will appear below the Brokers , Create from command line create Broker su–wbiadmin mqsicreatebroker MB_ Sample_broker-iwbiadmin-a wbiadmin-q mb_sample_queue start Broker mqsistart mb_sample_broker executiongroup mqsicreate