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https://github.com/parvez3019/star-notary-blockchain-project


https://github.com/parvez3019/star-notary-blockchain-project

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# ND1309 C2 Ethereum Smart Contracts, Tokens and Dapps - Project Starter 

**PROJECT: Decentralized Star Notary Service Project** - For this project, you will create a DApp by adding functionality with your smart contract and deploy it on the public testnet.



1) Your ERC-721 Token Name

2) Your ERC-721 Token Symbol

3) Version of the Truffle and OpenZeppelin used

4) Your Token Address on the Rinkeby Network



1) Starboy

2) SBY

3) Truffle version 

  Truffle v5.5.7 (core: 5.5.7)

  Ganache v^7.0.3

  Solidity v0.5.16 (solc-js)

  Node v14.18.1

  Web3.js v1.5.3

4) https://rinkeby.etherscan.io/address/0xe53456246322a233554dfdc5b9ab296e02ac8066#code



### ToDo

This Starter Code has already implemented the functionalities you implemented in the StarNotary (Version 2) exercise, and have comments in all the files you need to implement your tasks.



### Dependencies

For this project, you will need to have:

1. **Node and NPM** installed - NPM is distributed with [Node.js](https://www.npmjs.com/get-npm)

```bash

# Check Node version

node -v

# Check NPM version

npm -v

```



2. **Truffle v5.X.X** - A development framework for Ethereum. 

```bash

# Unsinstall any previous version

npm uninstall -g truffle

# Install

npm install -g truffle

# Specify a particular version

npm install -g [email protected]

# Verify the version

truffle version

```



2. **Metamask: 5.3.1** - If you need to update Metamask just delete your Metamask extension and install it again.



3. [Ganache](https://www.trufflesuite.com/ganache) - Make sure that your Ganache and Truffle configuration file have the same port.



4. **Other mandatory packages**:

```bash

cd app

# install packages

npm install --save  [email protected]

npm install --save  [email protected]

npm install webpack-dev-server -g

npm install web3

```



### Run the application

1. Clean the frontend 

```bash

cd app

# Remove the node_modules  

# remove packages

rm -rf node_modules

# clean cache

npm cache clean

rm package-lock.json

# initialize npm (you can accept defaults)

npm init

# install all modules listed as dependencies in package.json

npm install

```



2. Start Truffle by running

```bash

# For starting the development console

truffle develop

# truffle console



# For compiling the contract, inside the development console, run:

compile



# For migrating the contract to the locally running Ethereum network, inside the development console

migrate --reset



# For running unit tests the contract, inside the development console, run:

test

```



3. Frontend - Once you are ready to start your frontend, run the following from the app folder:

```bash

cd app

npm run dev

```



---



### Important

When you will add a new Rinkeyby Test Network in your Metamask client, you will have to provide:



| Network Name | New RPC URL | Chain ID |

|---|---|---|

|Private Network 1|`http://127.0.0.1:9545/`|1337 |



The chain ID above can be fetched by:

```bash

cd app

node index.js

```



## Troubleshoot

#### Error 1 

```

'webpack-dev-server' is not recognized as an internal or external command

```

**Solution:**

- Delete the node_modules folder, the one within the /app folder

- Execute `npm install` command from the /app folder



After a long install, everything will work just fine!



#### Error 2

```

ParserError: Source file requires different compiler version. 

Error: Truffle is currently using solc 0.5.16, but one or more of your contracts specify "pragma solidity >=0.X.X <0.X.X".

```

**Solution:** In such a case, ensure the following in `truffle-config.js`:

```js

// Configure your compilers  

compilers: {    

  solc: {      

    version: "0.5.16", // <- Use this        

    // docker: true,

    // ...

```



## Raise a PR or report an Issue

1. Feel free to raise a [Pull Request](https://github.com/udacity/nd1309-p2-Decentralized-Star-Notary-Service-Starter-Code/pulls) if you find a bug/scope of improvement in the current repository. 



2. If you have suggestions or facing issues, you can log in issue. 



---



Do not use the [Old depreacted zipped starter code](https://s3.amazonaws.com/video.udacity-data.com/topher/2019/January/5c51c4c0_project-5-starter-code/project-5-starter-code.zip)