Smart Contracts

Overview
This section is designed to get the casual smart contract developer up and running deploying ERC20 tokens on a harmony network. This can be done in under one Minute.
One Minute Deploy
Here is a short video running through the deployment.
One Minute Instructions
npm install -g truffle@5.0.38
git clone https://github.com/harmony-one/HRC.git
cd HRC
cp .envSample .env
npm install
truffle compile
truffle migrate --network testnet --reset
truffle networks
Interacting with contracts
truffle console --network testnet
truffle(testnet)> HarmonyERC20.deployed().then(function(instance){myHRC20=instance})
undefined
truffle(testnet)> myHRC20.symbol()
'H20'
truffle(testnet)> myHRC20.name()
'HarmonyERC20'
truffle(testnet)> myHRC20.decimals()
BN { negative: 0, words: [ 18, <1 empty item> ], length: 1, red: null }
truffle(testnet)> myHRC20.totalSupply()
BN {
  negative: 0,
  words: [ 16777216, 62077800, 20718012, 3, <1 empty item> ],
  length: 4,
  red: null
}
Detailed Overview
For detailed instructions, sample files and github repository please see below
​Smart Contract Development Using Truffle​
​Sample Files​
​H2O github repository​
Sample nodejs CLI Application
Deploying an Ethereum Smart Contract onto Harmony
Last updated 9 months ago