# Introduction

OKX Wallet provides official SDK packages of multiple chains including [Ethereum](./wallet), [Aptos](./aptos-api), [Tron](./tron-api) and Solana. Developers can interact with different on-chain projects through OKX Wallet SDK. 

## Installation

### Yarn

```javascript
$ yarn add @okwallet/extension
```

### npm

```javascript
$ npm install --save @okwallet/extension
// https://www.npmjs.com/package/@okwallet/extension
```

## Usage

### ES6

```javascript
import okxWeb3 from '@okwallet/extension';
console.log(okxWeb3);
```

## Basic APIs

### init

The initial access into OKX Wallet extension. You can achieve the following two functions with this method: 

1. Connecting to wallet
2. Monitoring wallet account changes


#### Error Information

All errors follow this interface:

```ts
interface ProviderRpcError extends Error {
  message: string;
  code: number;
  data?: unknown;
}
```

#### Returned Error Example

```js
{
  code: 4001;
  message: 'Tx Signature: User denied transaction signature.';
  stack: 'Error: Tx Signature: User denied transaction signature.';
}
```

#### Example

```javascript
const success = (wallet) => {
  // return wallet account information
  console.log(wallet);
};
const changed = (wallet) => {
  // return wallet account information
  // if there is no wallet is connecting, it will be null
  console.log(wallet);
};
const error = (error) => {
  // Error returned when rejected
  console.error(error);
};
const uninstall = () => {};

okxWeb3
  .init({
    success,
    changed,
    error,
    uninstall,
  })
  .then((wallet) => {
    // return wallet account information
    console.log(wallet);
  })
  .catch((error) => {
    // Error returned when rejected
    console.error(error);
  });
```

### disconnect

Disconnect with wallet

```javascript
import okWeb3 from '@okwallet/extension';

// only support extension
await okWeb3.disconnect();
```

### addListener

```javascript
import okWeb3 from '@okwallet/extension';

// add
okWeb3.addListener('connect', (isConnected) => {
  console.log(isConnected); // boolean
});

okWeb3.addListener('disconnect', () => {});

okWeb3.addListener('connectWallet', (wallet) => {
  console.log(wallet);
  // [
  //   {
  //     keyringName: 'WalletA',
  //     name: 'Account01',
  //     address: [
  //       {
  //         address: '0x81Fc6F6E44a2313743bCAA060681d24597aDbDfB',
  //         coinType: '60',
  //         name: 'okc',
  //       }
  //     ]
  //   }
  //   ...
  // ]
});

okWeb3.addListener('walletChanged', (wallet) => {
  console.log(wallet);
});

okWeb3.addListener('accountChanged', (wallet) => {
  console.log(wallet);
});

okWeb3.addListener('networkChanged', (chainId) => {
  console.log(chainId);
});

okWeb3.addListener('streamFailed', () => {});
```

### removeListener

```javascript
import okWeb3 from '@okwallet/extension';

const changedCb = (wallet) => {
  console.log(wallet);
};
// add
okWeb3.addListener('walletChanged', changedCb);
// remove
okWeb3.removeListener('walletChanged', changedCb);

```

### getAddress

CHAINS objects are the correspondence between the chain and its name:

| Key         | Value       |
| ----------- | ----------- |
| BITCOIN     | bitcoin     |
| ETHEREUM    | ethereum    |
| APTOS       | aptos       |
| OKC         | okexchain   |
| BSC         | bsc         |
| TRON        | tron        |
| SOLANA      | solana      |
| POLYGON     | polygon     |
| AVAX        | avax        |
| FTM         | ftm         |
| ARBITRUM    | arbitrum    |
| OPTIMISM    | optimism    |
| CRONOS      | cronos      |
| KLAYTN      | klaytn      |
| KCC         | kcc         |
| METIS       | metis       |
| BOBA        | boba        |
| GNOSIS      | gnosis      |
| RONIN       | ronin       |
| MOONRIVER   | moonriver   |
| MOONBEAM    | moonbeam    |
| HARMONY     | harmony     |
| LITECOIN    | litecoin    |
| BITCOINCASH | bitcoincash |
| BITCOINSV   | bitcoinsv   |
| ETHW        | ethw        |
| ETHF        | ethf        |

```javascript
import okWeb3 from '@okwallet/extension';

const { CHAINS } = okWeb3;

// get solana chain address
okWeb3
  .getAddress(CHAINS.SOLANA)
  .then((addr) => {
    // return solana address
    console.log(addr);
  })
  .catch((error) => {
    // Error returned when rejected
    console.log(error);
  });

// get addresses of all chains
okWeb3
  .getAddress()
  .then((addrMap) => {
    // return chain-address map
    console.log(addrMap);
  })
  .catch((error) => {
    // Error returned when rejected
    console.log(error);
  });
```

### Send Transaction

#### EVM

```javascript
import okWeb3 from '@okwallet/extension';

const { CHAINS } = okWeb3;

const payload = {
  from: '0x2f00171409b0d4f08da9abe0b53815fa3c5c6596',
  to: '0xd8E06c62ff0F6816487973d6EB7018C854599931',
  data: '0x',
  value: '0x00',
};

okWeb3
  .sendTransaction({ chainName: CHAINS.OKC, payload })
  .then((res) => {
    console.log(res.hash);
  })
  .catch((error) => {
    console.log(error);
  });
```

#### Solana

```js
import okWeb3 from '@okwallet/extension';
import {
  Transaction,
  SystemProgram,
  LAMPORTS_PER_SOL,
  PublicKey,
} from '@solana/web3.js';

const { CHAINS } = okWeb3;

const transaction = new Transaction({
  feePayer: okxwallet.solana.publicKey,
}).add(
  SystemProgram.transfer({
    fromPubkey: okxwallet.solana.publicKey,
    toPubkey: new PublicKey('CS8ifB68oddKXdW87RAyrxFSoz1DMMcX9WsWeAgbYDCC'),
    lamports: LAMPORTS_PER_SOL / 1000,
  })
);

okWeb3
  .sendTransaction({ chainName: CHAINS.SOLANA, payload: { transaction } })
  .then((res) => {
    console.log(res.hash);
  })
  .catch((error) => {
    console.log(error);
  });
```

#### Aptos

```js
const { CHAINS } = okWeb3;
const payload = {
  from: '0x2f7a44297ab64890dfb618202dd552033551b71ee9b36ad7d8b2ff8b805e0281',
  function: '0x1::aptos_account::transfer',
  arguments: [
    '0xd8a97d57565ca32babc4fca6498dbc3599ee4c23690287f76941df23c6c3aca3',
    '500000',
  ],
};

okWeb3
  .sendTransaction({ chainName: CHAINS.APTOS, payload })
  .then((res) => {
    console.log(res.hash);
  })
  .catch((error) => {
    console.log(error);
  });
```

### Sign Personal Message

#### EVM

```javascript
import okWeb3 from '@okwallet/extension';

const { CHAINS } = okWeb3;
const payload = {
  message: 'test message',
  account: '0xec92d8ea11587892f0516c19dcb1f8fd72993584',
};
okWeb3
  .signMessage({ chainName: CHAINS.OKC, payload })
  .then((signature) => {
    console.log(signature);
  })
  .catch((error) => {
    console.log(error);
  });
```

#### Solana

```js
import okWeb3 from '@okwallet/extension';

const { CHAINS } = okWeb3;
const payload = {
  message: 'test message',
};
okWeb3
  .signMessage({ chainName: CHAINS.SOLANA, payload })
  .then((signature) => {
    console.log(signature);
  })
  .catch((error) => {
    console.log(error);
  });
```

#### Aptos

```js
import okWeb3 from '@okwallet/extension';
const { CHAINS } = okWeb3;

const payload = {
  message: 'test message',
  nonce: 1,
};
okWeb3
  .signMessage({ chainName: CHAINS.APTOS, payload })
  .then((signature) => {
    console.log(signature);
  })
  .catch((error) => {
    console.log(error);
  });
```

---

### Aptos 

Special methods for Aptos are shown below. Methods of okWeb3.aptos objects are required to call Aptos chain. 

#### Register Coin

```javascript
import okWeb3 from '@okwallet/extension';

okWeb3.aptos
  .registerAptosCoin({
    contractAddress:
      '0xa2eda21a58856fda86451436513b867c97eecb4ba099da5775520e0f7492e852::coin::T',
  })
  .then((hash) => {
    console.log(hash);
  })
  .catch((error) => {
    console.log(error);
  });
```

#### Acquire Transaction Status by Hash

```javascript
import okWeb3 from '@okwallet/extension';

okWeb3.aptos
  .getAptosTransaction(
    '0x042d2a5ce883e4c8e13351b9053ec0ec86728a88ba07331cd5389816930bdb31'
  )
  .then((status) => {
    console.log(status);
  })
  .catch((error) => {
    console.log(error);
  });
```

#### Acquire Balance

- Main chain tokens

```javascript
import okWeb3 from '@okwallet/extension';

okWeb3.aptos
  .getAptosBalance({
    address:
      '0xcd30fbbda98b2aed026772c13e5ed90a7f056b589ef9e78cd96415e1af12451c',
    currency: '0x1::aptos_coin::AptosCoin',
  })
  .then((value) => {
    alert(value);
  })
  .catch((error) => {
    console.log(error);
  });
```

- Token

```javascript
import okWeb3 from '@okwallet/extension';

okWeb3.aptos
  .getAptosBalance({
    address:
      '0x253869f4b71ac5786c49c42b51faa0d0a58ff551cb9a7c267aaaa42018c89dd7',
    currency:
      '0xf22bede237a07e121b56d91a491eb7bcdfd1f5907926a9e58338f964a01b17fa::asset::USDT',
  })
  .then((value) => {
    console.log(value);
  })
  .catch((error) => {
    console.log(error);
  });
```

### Check and Register Coin

```javascript
import okWeb3 from '@okwallet/extension';

okWeb3.aptos
  .checkAndRegAptosCoin({
    address:
      '0x253869f4b71ac5786c49c42b51faa0d0a58ff551cb9a7c267aaaa42018c89dd7',
    currency:
      '0xf22bede237a07e121b56d91a491eb7bcdfd1f5907926a9e58338f964a01b17fa::asset::USDT',
  })
  .then((res) => {
    const { registered, hash } = res;
    console.log(registered);
    if (!registered) {
      console.log(res.hash);
    }
  })
  .catch((error) => {
    console.log(error);
  });
```