-
Structures : Each pet is equivalent to 1 smart contract Feature to detemine the shape of pet : Amount token + Number of days to raise pet In which:
- The amount of tokens determines the size
- The number of raising day determines the pet's effects
-
Interact with pet :
- Feed : Buy food in proportion to the amount you want to deposit into the smart contract
- Withdraw: Withdraw tokens from smart contract (pet) and transfer to the math wallet
-
Custom mathWallet:
- Install mathwallet
- Custom wallet testnet:
Select Custom:
- Fill in blank: Name : Harmony testnet (everything you want) Node address: https://api.s0.b.hmny.io
-
Blockchain (smart contracts):
- Load packages :
cd deploy_contract yarn install- Setup .env file:
TESTNET_PRIVATE_KEY= TESTNET_MNEMONIC= TESTNET_0_URL= TESTNET_1_URL= GAS_LIMIT=3321900 GAS_PRICE=1000000000
- Deploy contract:
yarn truffle migrate --network testnet
Contract abi will be located in client/src/contracts
-
Frontend ( Reactjs ):
- Load packages:
cd client yarn install- Setup .env file:
NODE_PATH=src/
- Run client server:
yarn start
Create a Harmony instance connecting to testnet
import { ChainID, ChainType, fromWei, hexToNumber, Units } from '@harmony-js/utils';
const hmy = new Harmony('https://api.s0.b.hmny.io', {
chainType: ChainType.Harmony,
chainId: ChainID.HmyTestnet
});Sign in with mathWallet
let isMathWallet = window.harmony && window.harmony.isMathWallet;
if (isMathWallet) {
let mathwallet = window.harmony;
mathwallet.getAccount().then(async (account) => {});
}Init factory harmony contract:
import Factory from 'contracts/PetWalletFactory.json';
let factoryAddress = Factory.networks[2].address;
let factory = hmy.contracts.createContract(Factory.abi, factoryAddress);Config gas && gaslinit:
const GAS_LIMIT = 6721900;
const GAS_PRICE = 1000000000;
const options = {
gasPrice: GAS_PRICE,
gasLimit: GAS_LIMIT
};Call function:
let petArray = await factory.methods
.getAllPetAddressOf(hmy.crypto.getAddress(account.address).checksum)
.call(options);Create transaction with mathWallet:
return new Promise(async (resolve, reject) => {
try {
// Add signer to contract instance
factory.wallet.defaultSigner = hmy.crypto.getAddress(account.address).checksum;
factory.wallet.signTransaction = async (tx) => {
try {
tx.from = hmy.crypto.getAddress(account.address).checksum;
const signTx = await window.harmony.signTransaction(tx);
return signTx;
} catch (e) {
console.error(e);
reject(e);
}
};
// Send transaction
const res = await factory.methods
.create(petId, targetFund, duration, purpose)
.send(options)
.then(() => {
window.location.href = `/mypets/${pets.length}`;
})
.catch((e) => {
console.log('Create pet action error', e);
});
resolve(res);
} catch (e) {
console.error(e);
reject(e);
}
});Give a ⭐️ if this project helped you!
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