stargeizer/onewallet

Features

Development

Install node.js and npm (I used node.js version v10.17.0 on my Mac)
Install dependencies :
```
npm install
```
Run the project :
```
npm run dev
```
Go to Chrome Extensions page and activate the Developer Mode.
Click Load Unpacked button and point it to /dist folder, the extension will be autoreloading as you change the codes.

Build Extension

Install node.js and npm.
Install dependencies :
```
npm install
```
Build the project :
```
npm run build
```
Uncompressed build can be found in /dist folder, compressed build is onewallet.zip.
Go to Chrome Extensions page and activate the Developer Mode.
Click Load Unpacked button and point it to /dist folder.

Create and Use the Smart Contract with the Extension

Install the latest @harmony-js/core npm

npm install @harmony-js/core@next

import the harmony extension package

const { HarmonyExtension } = require('@harmony-js/core');

Wait until the harmony-one wallet is injected and init the HarmonyExtension class with the injected object

const harmonyExt = await new HarmonyExtension(window.onewallet);

You can create the smart contract with harmonyExt object

const instance = harmonyExt.contracts.createContract(abi, address);

You can call the smart contract methods with the instance

await instance.methods.enter().send({
      value: new hmy.utils.Unit(100).asOne().toWei(),
      gasLimit: '1000001',
      gasPrice: new hmy.utils.Unit('10').asGwei().toWei(),
    });

Use the Harmony Extension Object

You can use the account of harmony one wallet extension with the following function

const account = await harmonyExt.login().then((acc) => {
                    //Todo with the account
                  })
                  .catch((err) => {
                    console.error(err);
                  });

You can sign out from the harmony extension if you want to switch the account

await harmonyExt.logout(); //or await window.onewallet.forgetIdentity();

You can also customize the harmony extension object

function getExtension(endpoint, shard, chaindID) {
  let ext;
  if (window.onewallet) {
    ext = new HarmonyExtension(window.onewallet);
    // Not mandatory, Harmony-One Wallet extension provides the mainnet to the third-party apps, to customize, you can change manually like below
    ext.setProvider(endpoint);
    ext.setShardID(shard);
    ext.setMessenger(new Messenger(ext.provider, ChainType.Harmony, chaindID));
    ext.contracts.wallet = ext.wallet;
  } else {
    console.error("Could not load harmony extension");
  }
  return ext;
};

How to Sign the transaction with the Harmony Extension object

Initiate the harmony object

const harmony = await new Harmony(rpc_url, {
    chainType: ChainType.Harmony,
    chainId: chain_id
  });

How to Create the transaction manually and sign with the harmony extension

Sign Normal Transaction for transfer funds

const txn = harmony.transactions.newTx({
  from: new HarmonyAddress(from).checksum,
  to: new HarmonyAddress(toAddress).checksum,
  value: Unit.Szabo(amounts[0].amount).toWei(),
  shardID: 0,
  toShardID: 0,
  gasLimit: gasEstimate,
  gasPrice: Unit.One(gasPrice).toHex()
});

signedTxn = await harmonyExt.wallet.signTransaction(txn); //or you can call window.onewallet.signTransaction(txn) directly
const [sentTxn, txnHash] = await signedTxn.sendTransaction();
...

Sign Staking Transaction

const stakingTxn = new StakingFactory(harmony.messenger)
  .delegate({
    delegatorAddress: new HarmonyAddress(delegatorAddress).checksum,
    validatorAddress: new HarmonyAddress(validatorAddress).checksum,
    amount: Unit.Szabo(amount).toHex()
  })
  .setTxParams({
    gasPrice: Unit.One(gasPrice).toHex(),
    gasLimit: Unit.Wei(new BN(gasEstimate).add(new BN("20000"))).toHex(),
    chainId: harmony.chainId
  })
  .build()
stakingTxn.setFromAddress(new HarmonyAddress(from).checksum)

signedTxn = await harmonyExt.wallet.signTransaction(txn); //or you can call window.onewallet.signTransaction(txn) directly
const [sentTxn, txnHash] = await signedTxn.sendTransaction();
...

Footnotes

The API interface of the One Wallet is the same as that of Mathwallet. You may use window.onewallet instead of window.harmony. This project is open-source, and we can improve the API interface based on community support; feel free to add suggestions as issues on the Github.

stargeizer / onewallet