/Dapp_notary_app

Dapp on Ethereum for CryptoStar -Blockchain nano degree

Primary LanguageJavaScript

Dapp on Ethereum for CryptoStar

etherscan

Token Info

  • ERC-721 token name : "Star Token"

  • ERC-721 token symbol : "STR"

  • Contract Address in Rinkeby Network : 0x929248153a771425EbAf0D6d3F0130Dd5fB91472

       Replacing 'StarNotary'
   ----------------------
> block number:        5115793
 > block timestamp:     1568875665
 > account:             0xCf6061886e9aB888fBB3267eE501970D476FB6C4
 > balance:             0.0695575
 > gas used:            2667934
 > gas price:           10 gwei
 > value sent:          0 ETH
 > total cost:          0.02667934 ETH
 > Total cost:          0.02667934 ETH

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.

Prerequisites

To install the software, you need to doownload the following:

  1. Install Node.js on your computer.
  2. Clone or download the repository to your local computer.
  3. Open the terminal and install the packages: npm install or yarn

If you want deploy the smart contract to Rinkeby network, you need to the following:

  1. The Metamask's backup phrase is required.
  2. Infura Project ID

Installing

The procedure to obtain development environment:

npm install --save truffle-hdwallet-provider
npm install --save openzeppelin-solidity

Run the truffle develope. Truffle Develop started at http://127.0.0.1:9545/

And You can get Accounts and Private Keys.

truffle develope

You have to type following command on New Terminal and Deploy the smart contract on the your rinkbey.

truffle migrate --network rinkeby --reset --compile-all

To run the front-end of the Dapp, You have to type following command on New Terminal.

cd app

Start the webpack-dev-server Project is running at http://localhost:8080/

npm run dev

Open that url in your browser to access the front-end of the Dapp.

Deploy the Smart Contract to Rinkeby Network

If you want deploy the smart contract to Rinkeby network, you need to the following:

  • You have to type your infura Project ID to const infuraKey = {Infura POJECT ID} in truffle-config.js file.
  • Type Metamask's backup phrase to const mnemonic = {METAMASK SEED} in truffle-config.js file.
  • Type truffle migrate --network rinkeby --reset --compile-all on the terminal.

Running the tests

Explain how to run the automated tests for this system.

  • You can run the unit test smart contract by test command on truffle console.
truffle(develop)> test
Using network 'develop'.


Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.



Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.



  ✓ can create a Star (75ms)
  ✓ lets user1 put up their star for sale (103ms)
  ✓ lets user1 get the funds after the sale (164ms)
  ✓ lets user2 buy a star, if it is put up for sale (169ms)
  ✓ lets user2 buy a star and decreases its balance in ether (135ms)
  ✓ can add the star name and star symbol properly (68ms)
  ✓ lets 2 users exchange stars (139ms)
  ✓ lets a user transfer a star (90ms)
  ✓ lookUptokenIdToStarInfo test (73ms)

  9 passing (1s)

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