smart contract tutorial

code example for invoking event events for intelligent contracts on the client and web side Web Truffle According to the official website example Http://truffleframework.com/boxes/pet-shop Truffle as a running test framework, it is also web3 to make calls to smart contracts. The location where the file is located src/js/app.js Initweb3:function () { //Web3 entry if (typeof web3!== ' undefined ') { app.web3provider = Web3.cu

Fabric Smart Contract Specific Code template analysis The smart contract of fabric is called chain code (CHAINCODE), which is divided into system chain code and user chain code. The system chain code is used to realize the function of the system level, and the user chain code realizes the user's application function.

your using the appropriate graphics card drivers etc F it doesn ' t work, try again without the-g. Ethminer doing some mining Again, you'll have a wall of stuff stream Past-this is Ethminer starting to does its business. I left it for a few hours and came back to some ether. writing a contract Once you have some ether, can stop mining and start writing! Parity has a built in contract development tool, whic

In June November 15, 2016, Chen Han signed a contract with Changfeng Technology of AVIC industry group to become a strategic long-term partner. The signing of this contract with hangzhou.com marks that Chen Han's Market Development in the rail transit field has taken a new step. The two sides will take this opportunity to carry out all-round cooperation to truly complement each other's advantageous resource

This article address: original link Share your experience on Hyperledger smart contracts. Source Address: Chaincode_example2 In the previous setfabriconubuntu, there was no need for virtualbox and vagrant to deploy the fabric directly, and its usefulness now manifests itself ~ The operation of the smart contract Chaincode does not require multiple nodes to be st

Today, the EOS wiki has been updated, trying to run the smart contract process with Mater. Although met a few pits, still ran through. Here are some of the main things, and 318 other areas. At the time of the./cloes Get account Currency The 318 version is like this: { "account_name": "Currency", " eos_balance": "0.0000 Eos", "staked_balance": "0.0001 eos", " Unstaking_balance ":" 0.0000 EOS ", " L

LogMath_contract.pastevents ("Articleoperationlog", {"Filter": {"_type": Encode_str ("Hello1")}}). Watch (My_callback1)# History Log# math_contract.pastevents ("Articleoperationlog"). Watch (My_callback1) while 1:# Math_contract.transact (). Publish (Encode_str ("Hello1"), Encode_str ("Hello1 Shanghai" ) Print(Time ()) Sleep (2)# _a = "1234562"# Print (Math_contract.encodeabi ("Adddna", args= (_a,_a,_a)))# Send a TX to the blockchain# Print (Math_contract.transact (). Adddna (_a, _a, _a))# S

In the previous blog, I introduced the xml serialization principles. In the basic tutorial of wcf, Contract data Contract DataContract serialization predecessor XmlSerializer xml serialization. Today we are moving forward along the last description, and this time there may be very few content, however, it should be said that if we want to further control xml, it

This is the 9th article in the Solidity Tutorial series to introduce solidity error handling.Solidity series complete list of articles please see the classification-solidity. It 's written in front . Solidity is an intelligent contract programming language for Ethernet, you should have a better understanding of Ethernet and intelligent contracts before reading this article,If you don't understand it, I sugg

Intelligent Contract Language Solidity tutorial series the second-solidity address type introduction. It 's written in front . Solidity is the Ethernet Square Intelligent Contract programming language, before reading this article, you should have an understanding of the ether square, the intelligent contract, if you do

Solidity Tutorial Series The third-solidity function type introduction. It 's written in front . Solidity is the Ethernet Square Intelligent Contract programming language, before reading this article, you should have an understanding of the ether square, the intelligent contract, if you do not understand, suggest you first look at the etheric square is what The f

Javascript: Slide Show/contract the effect of the ad code instance, Javascript tutorial Function Description:Slide to expand or contract the advertising effect. You can specify the duration and maximum height when the advertisement is fully expanded. Compatible with browsers: IE5.0 +, FF1.06 +, and Opera8.0 + Instance code: The following is a refer

Solidity Tutorial Series 4th-Solidity data location analysis. It 's written in front . Solidity is an intelligent contract programming language for Ethernet, you should have a better understanding of Ethernet and intelligent contracts before reading this article,If you don't understand it, I suggest you look at the etheric square first. This part of the content of the official English document is not very t

Example: Public classPhone {[Key]//PRIMARY Key Public intId {Get;Set; } [Required]//cannot be empty[MinLength (2), MaxLength ( -)]//min. length 2, max length Public stringName {Get;Set; } [Stringlength ( -)]//The string length is Public stringNumber {Get;Set; } PublicDateTime CreateDate {Get;Set; } Public BOOLIsValid {Get;Set; } Public stringCarrieroperator {Get;Set; } }For more agreement configuration, refer to here: http://www.cnblogs.com/Gyoung/archive/2013/01/1