DAPP格莱特GRETT代币质押投资模式系统开发

　　简单的说智能合约就像区块链的后端编程一样【181公链2591開发3365微电】它调整了区块链驱动程序的解决方案和各自区块链之上的去中心化应用程序。每个区块链用例，无论行业类型或可用性如何，都由自动执行的书面程序（智能合约）支持。智能合约在去中心化元宇宙中的作用是必不可少的。

　　智能合约的特点有以下几点：

　　1.合约内容可以被做到公开透明，且里面的内容是改不了的，主要原因是因为智能合约运行在区块链上，区块链具有防篡改的特点。

　　2.持续运行，只要智能合约在运行，链上的网络节点就会不断维护，区块链的存在也会继续保存下去。

　　3.值得信任，安全性能高，代码具备一定的性，交易者可以安全进行交易。

　　4.经济，智能合约通过计算机语言很好的避免分歧，达成共识的成本低，还有智能合约上仲裁结果一出马上就能执行生效。

　　在未来的交易上区块链dapp开发会更大规模的被应用，在线上交易容易产生猜忌，而智能合约是能够公平执行合约内容的，这期间不会有第三方出手，执行出来的结果也会让交易双方信服。

　　What is Smart Contract:Nick Szabo introduced this concept in 1994 and defined a smart contract as“A computerized transaction protocol that executes the terms of a contract”[5].Nick Szabo suggested translating contractual clauses into code,and embedding them into property that can self-enforce them[6].However,in blockchain systems,the meaning of smart contracts has evolved.Within the blockchain context,smart contracts are scripts recorded on the blockchain.(They can be thought of as roughly analogous to recorded procedures in relational database management systems[7].Since they reside on the chain,they have a unique address.We trigger a smart contract by addressing a transaction to it.It then executes independently and automatically in a prescribed manner on every node in the network,according to the data that was included in the triggering transaction[4].

　　Truffle is a development environment and a testing frame-work.This helps in the automatic compilation and deployingof contract on Blockchain without much problem.It also helpswhile making migration in Blockchain.Finally using trufflewe deployed the contract on a private Ethereum Blockchain.Deploying the contract on Blockchain is also a transactionand hence required ether which can be obtained by simplydoing miner.start(1)in your geth console.(Note:Rememberthe difficulty parameter we talked about in Genesis file,theva lue of the parameter should be less or else it will become a pain for you to mine ether).

　　Truffle是一个开发环境和测试框架。这有助于在区块链上自动编译和部署contract，没有太多问题。它也有助于在区块链中进行迁移。后，我们使用truffle将合同部署在私有以太坊区块链上。在区块链上部署契约也是一个事务，因此需要ether，可以通过在geth控制台中执行miner.start(1)来获得。(注意:记住我们在Genesis文件中提到的难度参数，参数的值应该更小，否则你挖掘以太会很痛苦)。