基于区块链的毕业设计”Quick” Start – “快速”启动

本文提供基于区块链的毕业设计国外最新区块链项目源码下载,包括solidity,eth,fabric等blockchain区块链,基于区块链的毕业设计”Quick” Start – “快速”启动 是一篇很好的国外资料

“Quick” Start

Environment variables

First things first, create a file called .env. It will look something like this.

PORT=3000 MODE="development" LOCAL_NODE="http://localhost:7545" REMOTE_NODE="https://rinkeby.infura.io/v3/<SOME ID>" MNEMONIC = "blah blah blah blah" 

LOCAL_NODE is the address of a local blockchain you’re going to run.

REMOTE_NODE refers to the one you’re going to deploy to remotely. Probably a test network, the main Ethereum net is probably too expensive to make this deploy worthwhile. You can get an endpoint to deploy from via https://infura.io/register.

The MNEMONIC is the mnemonic for accessing the wallet you’ll use to pay the gas for deploying the contract on a remote node like Rinkeby. Make sure that wallet has enough ETH in it.

Deploy to a local blockchain

  1. Install Ganache
  2. Start Ganache and do “Quickstart”
  3. Run npm start
  4. Run truffle migrate in this directory
  5. You should see two mirations. The one called 1609276627_conways_game_of_life should have a contract address: – copy down the value somewhere.

Deploy to rinkeby

  1. Run truffle migrate --network rinkeby
  2. You should see two mirations. The one called 1609276627_conways_game_of_life should have a contract address: – copy down the value somewhere.

Start the web app

npm install 

Then in one shell run npm start and npm run webpack in another.

Go to http://localhost:3000 and you should see the board.

Get onto the console

  1. Go to truffle develop/truffle console --network rinkeby
let instance = await ConwaysGameOfLife.deployed() let accounts = await web3.eth.getAccounts() // Set this to whatever the contract address from `migrate` was let contractAddress = '0x0aAd3D96a59806f9FE651Ab4a52E8F82b934DE45'  // Let's send the contract some ETH await web3.eth.sendTransaction({to: contractAddress, from: accounts[0], value: 1000000000000000, gas: 300722130000})  // This should show you what the world currently looks like instance.getWorld() instance.world.call()  // Make sure it has some ETH to pay the gas costs of `getWorld` web3.eth.getBalance(contractAddress)  // Make sure the address we are using has ETH web3.eth.getBalance(accounts[0])  // Send the exact right amount to step the world, and make sure the gas price is high enough web3.eth.sendTransaction({to: contractAddress, from: accounts[0], value: 10000000000000, gas: 3000000})  // Check the world again instance.getWorld()

Optimisation

V0.0.2

  • Changed optimise for solc to 200 runs
  • Using uint8 for numLiveNeighbours
  • Worldlength up top

Typical Gas Price: 402278 somehow higher 🤔

V0.0.1

Typical Gas Price: 276482


快速启动

环境变量

首先,创建一个名为.env的文件。它看起来像这样。

PORT=3000 MODE="development" LOCAL_NODE="http://localhost:7545" REMOTE_NODE="https://rinkeby.infura.io/v3/<SOME ID>" MNEMONIC = "blah blah blah blah" 

LOCALu NODE是您要运行的本地区块链blockchain的地址。

远程u节点是指您要远程部署到的节点。可能是一个测试网络,主要以太坊eth网络可能太贵,使这个部署值得。您可以通过获取要部署的端点https://infura.io/register。

助记符是访问钱包的助记符,您将使用钱包支付在远程节点(如Rinkeby)部署合同的费用。确保钱包里有足够的钱。

部署到本地区块链blockchain

  1. 安装Ganache
  2. 启动Ganache执行“快速启动”
  3. 运行npm start
  4. 运行truffle migrate在这个目录中
  5. 您应该会看到两个幻象。一个叫1609276627u conwaysu gameu ofu life的应该有一个合同地址:-把价值复制到某个地方。你应该看到两个幻象。一个叫1609276627u conwaysu gameu ofu life的应该有一个合同地址:-把价值复制到某个地方。转到truffle develop/truffle console—network rinkeby,将solc的优化设置更改为200次,使用uint8进行numLiveNeighbours

部署到rinkeby

  1. Run truffle migrate --network rinkeby
  2. You should see two mirations. The one called 1609276627_conways_game_of_life should have a contract address: – copy down the value somewhere.

启动web应用

npm install 

然后在一个shell中运行npm start,在另一个shell中运行npm webpack。

转到http://localhost:3000,你应该看到黑板。

进入控制台

  1. Go to truffle develop/truffle console --network rinkeby
let instance = await ConwaysGameOfLife.deployed() let accounts = await web3.eth.getAccounts() // Set this to whatever the contract address from `migrate` was let contractAddress = '0x0aAd3D96a59806f9FE651Ab4a52E8F82b934DE45'  // Let's send the contract some ETH await web3.eth.sendTransaction({to: contractAddress, from: accounts[0], value: 1000000000000000, gas: 300722130000})  // This should show you what the world currently looks like instance.getWorld() instance.world.call()  // Make sure it has some ETH to pay the gas costs of `getWorld` web3.eth.getBalance(contractAddress)  // Make sure the address we are using has ETH web3.eth.getBalance(accounts[0])  // Send the exact right amount to step the world, and make sure the gas price is high enough web3.eth.sendTransaction({to: contractAddress, from: accounts[0], value: 10000000000000, gas: 3000000})  // Check the world again instance.getWorld()

优化

  • Changed optimise for solc to 200 runs
  • Using uint8 for numLiveNeighbours
  • Worldlength up top

典型天然气价格:402278略高🤔

典型天然气价格:276482

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