ERC-721 Token Name: Udacity Dollar
ERC-721 Token Symbol: UDD
Version of Truffle used: 5.0.2
Version of OpenZeppelin used: 2.3
Token Address on the Rinkeby Network: 0x792925Ef40e504B460dE21d68106Ce6CE5b848AB
For this project, you will need to have:
- Node and NPM installed - NPM is distributed with Node.js
# Check Node version
node -v
# Check NPM version
npm -v- Truffle v5.X.X - A development framework for Ethereum.
# 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-
Metamask: 5.3.1 - If you need to update Metamask just delete your Metamask extension and install it again.
-
Ganache - Make sure that your Ganache and Truffle configuration file have the same port.
-
Other mandatory packages:
cd app
# install packages
npm install --save [email protected]
npm install --save [email protected]
npm install webpack-dev-server -g
npm install web3- Clean the frontend
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- Start Truffle by running
# 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- Frontend - Once you are ready to start your frontend, run the following from the app folder:
cd app
npm run devWhen 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:
cd app
node index.js'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 installcommand from the /app folder
After a long install, everything will work just fine!
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:
// Configure your compilers
compilers: {
solc: {
version: "0.5.16", // <- Use this
// docker: true,
// ...
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