Ref – 裁判区块链毕设代写

区块链毕设代写本文提供国外最新区块链项目源码下载,包括solidity,eth,fabric等blockchain区块链,Ref – 裁判区块链毕设代写 是一篇很好的国外资料

Ref

Voting Application using Smart Contract https://nhancv.medium.com/voting-application-using-smart-contract-185e16dbfa35

Issue your ERC20 token with Solidity on Ethereum Blockchain https://nhancv.medium.com/issue-your-token-with-solidity-on-ethereum-blockchain-6e640eb613ff

SmartContract ICO Crowdsale simple https://nhancv.medium.com/smartcontract-ico-crowdsale-simple-35dc5ff02459

Example https://github.com/nhancv/nc-blockchain-netday

ERC20 & TRC20 Token template https://gist.github.com/nhancv/58997e9a6e7f896627339d122e5671bf

Remix online IDE https://remix.ethereum.org/#optimize=true&runs=200&evmVersion=null&version=soljson-v0.8.3+commit.8d00100c.js

Install

TRUFFLE CLI

https://www.trufflesuite.com/docs/truffle/quickstart

npm install truffle -g 

GANACHE

https://www.trufflesuite.com/ganache

Structure

mkdir truffle && cd truffle mkdir frontend // <-- frontend application mkdir smartcontracts && cd smartcontracts npm init -y npm install truffle-hdwallet-provider --save npm install bip39 dotenv --save npm install @openzeppelin/contracts @openzeppelin/contracts-upgradeable @openzeppelin/truffle-upgrades --save truffle init 

Build and Deploy Contract

# Setup local Blockchain Install Ganache Open Ganache -> New workspace -> Add Project -> Point to truffle/smartcontracts/truffle-config.js -> Save  # Prepare wallet cd truffle/smartcontracts cp .env.example .env Copy MNEMONIC generated by Ganache ACCOUNTS and paste to MNEMONIC value in .env created previous step  # Compile only  truffle compile  # Or Compile and deploy contract to local test truffle migrate  # Check success output Compiling your contracts... =========================== > Compiling ./contracts/CryptoLott.sol > Compiling ./contracts/Migrations.sol > Artifacts written to ../truffle/frontend/src/Contract/abi > Compiled successfully using:    - solc: 0.5.16+commit.9c3226ce.Emscripten.clang    Starting migrations... ====================== > Network name:    'development' > Network id:      5777 > Block gas limit: 6721975 (0x6691b7)   1_initial_migration.js ======================     Replacing 'Migrations'    ----------------------    > transaction hash:    0x5285171ea479d985aa5086f26b37060012ba408ec852d555b2556fc34420c7b8    > Blocks: 0            Seconds: 0    > contract address:    0x55DBfe6239AAC6b9927fe9c37166C87F943e787e    > block number:        1    > block timestamp:     1616777661    > account:             0x6918C8D2a75abfA5Afca786EFAF60BefDBDD8d24    > balance:             99.99616114    > gas used:            191943 (0x2edc7)    > gas price:           20 gwei    > value sent:          0 ETH    > total cost:          0.00383886 ETH      > Saving migration to chain.    > Saving artifacts    -------------------------------------    > Total cost:          0.00383886 ETH   2_deploy_contracts.js =====================     Replacing 'CryptoLott'    ----------------------    > transaction hash:    0x6501e8edec15ba4d15dc3ad78e8a5458e6d1f07cb4923747ff273e2b5597d0bf    > Blocks: 0            Seconds: 0    > contract address:    0x716103d7CfC4D353Ba1a9a1D6D06bE1C0F803275    > block number:        3    > block timestamp:     1616777661    > account:             0x6918C8D2a75abfA5Afca786EFAF60BefDBDD8d24    > balance:             99.94754624    > gas used:            2388407 (0x2471b7)    > gas price:           20 gwei    > value sent:          0 ETH    > total cost:          0.04776814 ETH      > Saving migration to chain.    > Saving artifacts    -------------------------------------    > Total cost:          0.04776814 ETH   Summary ======= > Total deployments:   2 > Final cost:          0.051607 ETH  # Validate Check on Ganache in Blocks, Transactions, Contracts, Events, Logs, ... 

Intergrate contract with Frontend React App

## Prerequisite - Node: 8.16.0 - Npm: 6.4.1 - Web3: 1.0.0-beta.33  ## Install Metamask Extension and Unlock https://metamask.io/  Open Metamask -> Switch network -> Custom RPC -> (fill local Blockchain network info) Network name: Localhost 7545 New RPC URL: http://127.0.0.1:7545 Chain ID: 1337  ## Updated built contract data to frontend Copy contract address deployed in previous step > contract address:    0x716103d7CfC4D353Ba1a9a1D6D06bE1C0F803275  Update new contract address to `truffle/frontend/src/Contract/CryptoLottContract.ts` at `initContract` method  ## Build Frontend cd truffle/frontend npm install --legacy-peer-deps npm start  Go to: http://localhost:3000/  

BONUS: Deploy TRON TOKEN

Create TRC10 Token on TRON network with nodejs https://nhancv.medium.com/create-trc10-token-on-tron-network-with-nodejs-9970116d5284

Create TRC20 Token on TRON network with nodejs https://nhancv.medium.com/create-trc20-token-on-tron-network-with-nodejs-5eb2b6115a4f


Create Testing Solidity token:

  • Install Metamask
  • The ETH wallets generated automatically

Ropsten ETH Token

  • Open Metamask -> Switch env to Ropsten Test Network
Network Name: Ropsten Test Network New RPC URL: https://ropsten.infura.io/v3/undefined Chain ID: 3 Currency Symbol (optional): ETH Block Explorer URL (optional): https://ropsten.etherscan.io 
  • Get some ETH coin to deploy smart contract: https://faucet.ropsten.be/
  • Access: https://remix.ethereum.org/#optimize=false&runs=200&evmVersion=null&version=soljson-v0.8.1+commit.df193b15.js
    • Create contracts/ERC20Token.sol
    • Fill ERC20Token.sol with source code at: ./truffle/smartcontracts/contracts/ERC20Token.sol
    • Modify ERC20Token.sol to your token info
    • Compile tab: Compile ERC20Token.sol
    • Deploy tab: Select Environment -> Injected Web3 -> Select Contract your contract class name -> Deploy

Binance Smart Chain BEP20 Token

https://academy.binance.com/en/articles/connecting-metamask-to-binance-smart-chain

  • Open Metamask -> Custom RPC
# Testnet Network Name: Binance Smart Chain - Testnet New RPC URL: https://data-seed-prebsc-1-s1.binance.org:8545/ ChainID: 97 Symbol: BNB Block Explorer URL: https://testnet.bscscan.com  # Mainnet Network Name: Binance Smart Chain New RPC URL: https://bsc-dataseed.binance.org/ ChainID: 56 Symbol: BNB Block Explorer URL: https://bscscan.com 
  • Get some BNB coin to deploy smart contract: https://testnet.binance.org/faucet-smart
  • Access: https://remix.ethereum.org and do the same with Ropsten ETH Token

Avalanche (AVAX) Chain Token

https://docs.avax.network/build/tutorials/smart-contracts/deploy-a-smart-contract-on-avalanche-using-remix-and-metamask

  • Open Metamask -> Custom RPC
# FUJI Testnet Settings Network Name: Avalanche FUJI C-Chain New RPC URL: https://api.avax-test.network/ext/bc/C/rpc ChainID: 0xa869 Symbol: AVAX Explorer: https://cchain.explorer.avax-test.network  # Avalanche Mainnet Settings Network Name: Avalanche Mainnet C-Chain New RPC URL: https://api.avax.network/ext/bc/C/rpc ChainID: 0xa86a Symbol: AVAX Explorer: https://cchain.explorer.avax.network/ 
  • AVAX address info:

AVAX tokens exist on the X-Chain, where they can be traded, on the P-Chain, where they can be provided as a stake when validating the Primary Network, and on the C-Chain, where they can be used in smart contracts or to pay for gas. In this tutorial, we’ll send AVAX tokens between the X-Chain and C-Chain.

  • Get some AVAX coin to deploy smart contract: https://faucet.avax-test.network/
- Copy ETH address generated by Metamask -> Now this address will be C-Chain AVAX address - Access https://wallet.avax.network/ -> Switch env to Fuji network - Import wallet with private key of above C-Chain AVAX address - Now you can see, we have 3 wallet address types with 3 address:      + Available (X) = 0 (X-fuji1hjfdc8hsqtfju27lzfn8zyztlrdr9220ucura6)     + Available (P) = 0 (P-fuji1hjfdc8hsqtfju27lzfn8zyztlrdr9220ucura6)     + Available (C) = 0 (0xfd0c67edd5e4ce03cd8397dc748b19b0a5c0f645 <- reused eth address in Metamask) - Access https://faucet.avax-test.network/ -> fill specific address to get test coin - You can move you coin from X-Chain to C-Chain and vice versa with 'Cross Chain' at https://wallet.avax.network/wallet/cross_chain  
  • Access: https://remix.ethereum.org and do the same with Ropsten ETH Token

Upgrade contracts

change the contract code, while preserving the state, balance, and address

  • https://docs.openzeppelin.com/learn/upgrading-smart-contracts
  • https://docs.openzeppelin.com/upgrades-plugins/1.x/writing-upgradeable
  • https://docs.openzeppelin.com/upgrades-plugins/1.x/truffle-upgrades

参考

使用智能合约的投票应用程序https://nhancv.medium.com/voting-application-using-smart-contract-185e16dbfa35

以太坊eth区块链blockchain上发行具有Solidity的ERC20代币https://nhancv.medium.com/issue-your-token-with-solidity-on-ethereum-blockchain-6e640eb613ff

SmartContract ICO简单众售https://nhancv.medium.com/smartcontract-ico-crowdsale-simple-35dc5ff02459

示例https://github.com/nhancv/nc-blockchain-netday

ERC20&amp;TRC20令牌模板https://gist.github.com/nhancv/58997e9a6e7f896627339d122e5671bf

混合在线IDEhttps://remix.ethereum.org/#optimize=真值(&A);运行=200&amp;evmVersion=null&amp;版本=soljson-v0.8.3+commit.8d00100c.js

安装

TRUFFLE CLI

https://www.trufflesuite.com/docs/truffle/quickstart

npm install truffle -g 

加纳什

https://www.trufflesuite.com/ganache

结构

mkdir truffle && cd truffle mkdir frontend // <-- frontend application mkdir smartcontracts && cd smartcontracts npm init -y npm install truffle-hdwallet-provider --save npm install bip39 dotenv --save npm install @openzeppelin/contracts @openzeppelin/contracts-upgradeable @openzeppelin/truffle-upgrades --save truffle init 

构建和部署合同

# Setup local Blockchain Install Ganache Open Ganache -> New workspace -> Add Project -> Point to truffle/smartcontracts/truffle-config.js -> Save  # Prepare wallet cd truffle/smartcontracts cp .env.example .env Copy MNEMONIC generated by Ganache ACCOUNTS and paste to MNEMONIC value in .env created previous step  # Compile only  truffle compile  # Or Compile and deploy contract to local test truffle migrate  # Check success output Compiling your contracts... =========================== > Compiling ./contracts/CryptoLott.sol > Compiling ./contracts/Migrations.sol > Artifacts written to ../truffle/frontend/src/Contract/abi > Compiled successfully using:    - solc: 0.5.16+commit.9c3226ce.Emscripten.clang    Starting migrations... ====================== > Network name:    'development' > Network id:      5777 > Block gas limit: 6721975 (0x6691b7)   1_initial_migration.js ======================     Replacing 'Migrations'    ----------------------    > transaction hash:    0x5285171ea479d985aa5086f26b37060012ba408ec852d555b2556fc34420c7b8    > Blocks: 0            Seconds: 0    > contract address:    0x55DBfe6239AAC6b9927fe9c37166C87F943e787e    > block number:        1    > block timestamp:     1616777661    > account:             0x6918C8D2a75abfA5Afca786EFAF60BefDBDD8d24    > balance:             99.99616114    > gas used:            191943 (0x2edc7)    > gas price:           20 gwei    > value sent:          0 ETH    > total cost:          0.00383886 ETH      > Saving migration to chain.    > Saving artifacts    -------------------------------------    > Total cost:          0.00383886 ETH   2_deploy_contracts.js =====================     Replacing 'CryptoLott'    ----------------------    > transaction hash:    0x6501e8edec15ba4d15dc3ad78e8a5458e6d1f07cb4923747ff273e2b5597d0bf    > Blocks: 0            Seconds: 0    > contract address:    0x716103d7CfC4D353Ba1a9a1D6D06bE1C0F803275    > block number:        3    > block timestamp:     1616777661    > account:             0x6918C8D2a75abfA5Afca786EFAF60BefDBDD8d24    > balance:             99.94754624    > gas used:            2388407 (0x2471b7)    > gas price:           20 gwei    > value sent:          0 ETH    > total cost:          0.04776814 ETH      > Saving migration to chain.    > Saving artifacts    -------------------------------------    > Total cost:          0.04776814 ETH   Summary ======= > Total deployments:   2 > Final cost:          0.051607 ETH  # Validate Check on Ganache in Blocks, Transactions, Contracts, Events, Logs, ... 

与前端React应用程序集成合同

## Prerequisite - Node: 8.16.0 - Npm: 6.4.1 - Web3: 1.0.0-beta.33  ## Install Metamask Extension and Unlock https://metamask.io/  Open Metamask -> Switch network -> Custom RPC -> (fill local Blockchain network info) Network name: Localhost 7545 New RPC URL: http://127.0.0.1:7545 Chain ID: 1337  ## Updated built contract data to frontend Copy contract address deployed in previous step > contract address:    0x716103d7CfC4D353Ba1a9a1D6D06bE1C0F803275  Update new contract address to `truffle/frontend/src/Contract/CryptoLottContract.ts` at `initContract` method  ## Build Frontend cd truffle/frontend npm install --legacy-peer-deps npm start  Go to: http://localhost:3000/  

奖金:部署TRON令牌

使用nodejs在TRON网络上创建TRC10令牌https://nhancv.medium.com/create-trc10-token-on-tron-network-with-nodejs-9970116d5284

使用nodejs在TRON网络上创建TRC20令牌https://nhancv.medium.com/create-trc20-token-on-tron-network-with-nodejs-5eb2b6115a4f


创建测试坚固性令牌:

  • 安装元掩码
  • 自动生成的ETH钱包

Ropsten ETH令牌

  • 打开元掩码-&gt;将env切换到Ropsten测试网络
Network Name: Ropsten Test Network New RPC URL: https://ropsten.infura.io/v3/undefined Chain ID: 3 Currency Symbol (optional): ETH Block Explorer URL (optional): https://ropsten.etherscan.io 
  • 获取一些ETH硬币以部署智能合约:https://faucet.ropsten.be/
  • 访问:https://remix.ethereum.org/#optimize=错误(&A);运行=200&amp;evmVersion=null&amp;version=soljson-v0.8.1+commit.df193b15.js Create contracts/ERC20Token.sol使用以下源代码填充ERC20Token.sol:./truffle/smartcontracts/contracts/ERC20Token.sol将ERC20Token.sol修改到您的令牌信息编译选项卡:编译ERC20Token.sol部署选项卡:选择环境-&gt;注入Web3-&gt;选择合同类名称-&gt;部署

Binance智能链BEP20令牌

https://academy.binance.com/en/articles/connecting-metamask-to-binance-smart-chain

  • 打开元掩码-&gt;自定义RPC
# Testnet Network Name: Binance Smart Chain - Testnet New RPC URL: https://data-seed-prebsc-1-s1.binance.org:8545/ ChainID: 97 Symbol: BNB Block Explorer URL: https://testnet.bscscan.com  # Mainnet Network Name: Binance Smart Chain New RPC URL: https://bsc-dataseed.binance.org/ ChainID: 56 Symbol: BNB Block Explorer URL: https://bscscan.com 
  • 获取一些BNB硬币以部署智能合约:https://testnet.binance.org/faucet-smart
  • 访问:https://remix.ethereum.org and 对Ropsten ETH Token执行相同操作

Avalanche(AVAX)链令牌

https://docs.avax.network/build/tutorials/smart-contracts/deploy-a-smart-contract-on-avalanche-using-remix-and-metamask

  • 打开元掩码-&gt;自定义RPC
# FUJI Testnet Settings Network Name: Avalanche FUJI C-Chain New RPC URL: https://api.avax-test.network/ext/bc/C/rpc ChainID: 0xa869 Symbol: AVAX Explorer: https://cchain.explorer.avax-test.network  # Avalanche Mainnet Settings Network Name: Avalanche Mainnet C-Chain New RPC URL: https://api.avax.network/ext/bc/C/rpc ChainID: 0xa86a Symbol: AVAX Explorer: https://cchain.explorer.avax.network/ 
  • AVAX地址信息:

AVAX代币存在于X链上,在X链上可以交易,在p链上,在验证主网络时可以作为股份提供,在C链上,它们可以用于智能合约或支付天然气费用。在本教程中,我们将在X链和C链之间发送AVAX令牌

  • 获取一些AVAX硬币以部署智能合约:https://faucet.avax-test.network/
- Copy ETH address generated by Metamask -> Now this address will be C-Chain AVAX address - Access https://wallet.avax.network/ -> Switch env to Fuji network - Import wallet with private key of above C-Chain AVAX address - Now you can see, we have 3 wallet address types with 3 address:      + Available (X) = 0 (X-fuji1hjfdc8hsqtfju27lzfn8zyztlrdr9220ucura6)     + Available (P) = 0 (P-fuji1hjfdc8hsqtfju27lzfn8zyztlrdr9220ucura6)     + Available (C) = 0 (0xfd0c67edd5e4ce03cd8397dc748b19b0a5c0f645 <- reused eth address in Metamask) - Access https://faucet.avax-test.network/ -> fill specific address to get test coin - You can move you coin from X-Chain to C-Chain and vice versa with 'Cross Chain' at https://wallet.avax.network/wallet/cross_chain  
  • 访问:https://remix.ethereum.org and 对Ropsten ETH Token执行相同的操作https://docs.openzeppelin.com/learn/upgrading-smart-contracts

升级合同

更改合同代码,同时保持状态、平衡,地址

  • https://docs.openzeppelin.com/upgrades-plugins/1.x/writing-upgradeable
  • https://docs.openzeppelin.com/upgrades-plugins/1.x/truffle-upgrades 你知道吗
  • https://docs.openzeppelin.com/upgrades-plugins/1.x/truffle-upgrades

部分转自网络,侵权联系删除区块链源码网

www.interchains.cc

https://www.interchains.cc/22298.html

区块链毕设网(www.interchains.cc)全网最靠谱的原创区块链毕设代做网站 部分资料来自网络,侵权联系删除! 最全最大的区块链源码站 ! QQ3039046426
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