# Orion Protocol SDK

# Install

```console
npm i @orionprotocol/sdk
```

# Usage

## High level methods

### Easy start

```ts
// Node.js
import "dotenv/config";
import { initOrionUnit } from "@orionprotocol/sdk";
import { Wallet } from "ethers";

const chain = process.env.CHAINID; // 0x38
const env = process.env.ENV; // production
const privateKey = process.env.PRIVATE_KEY; // 0x...

if (!chain) throw new Error("CHAINID is required");
if (!env) throw new Error("ENV is required");
if (!privateKey) throw new Error("PRIVATE_KEY is required");

const wallet = new Wallet(privateKey);
// OrionUnit is chain-in-environment abstraction
const orionUnit = initOrionUnit(chain, env);
```

```ts
// UI

import { initOrionUnit } from "@orionprotocol/sdk";
import detectEthereumProvider from "@metamask/detect-provider";
import { BaseProvider } from "@metamask/providers";
import { providers } from "ethers";

const chain = "0x61"; // bsc-testnet
const env = "testing";

const startApp = async (provider: BaseProvider) => {
  const web3provider = new providers.Web3Provider(provider);
  await web3Provider.ready;
  const signer = web3Provider.getSigner(); // ready to go
  const orionUnit = initOrionUnit(chain, env); // ready to go
};

detectEthereumProvider().then((provider) => {
  if (provider) {
    startApp(provider as BaseProvider);
  } else {
    console.log("Please install MetaMask!");
  }
});
```

#### Withdraw

```ts
orionUnit.exchange.withdraw({
  amount: 435.275,
  asset: "USDT",
  signer: wallet, // or signer when UI
});
```

#### Deposit

```ts
orionUnit.exchange.deposit({
  amount: 2.5,
  asset: "ORN",
  signer: wallet, // or signer when UI
});
```

#### Make swap market

```ts
orionUnit.exchange
  .swapMarket({
    type: "exactSpend",
    assetIn: "ORN",
    assetOut: "USDT",
    feeAsset: "ORN",
    amount: 23.89045345,
    slippagePercent: 1,
    signer: wallet, // or signer when UI
    options: {
      logger: console.log,
      // Set it to true if you want the issues associated with
      // the lack of allowance to be automatically corrected
      autoApprove: true,
    },
  })
  .then(console.log);
```

## Low level methods

### Get historical price

```ts
const candles = await orionUnit.priceFeed.getCandles(
  "ORN-USDT",
  1650287678, // interval start
  1650374078, // interval end
  "5m", // interval
  "all" // exchange
);
```

### Using contracts

```ts
import { contracts } from "@orionprotocol/sdk";

const exchangeContract = contracts.Exchange__factory.connect(
  exchangeContractAddress,
  orionUnit.provider
);
const erc20Contract = contracts.ERC20__factory.connect(
  tokenAddress,
  orionUnit.provider
);
const governanceContract = contracts.OrionGovernance__factory.connect(
  governanceAddress,
  orionUnit.provider
);
const orionVoting = contracts.OrionVoting__factory.connect(
  votingContractAddress,
  orionUnit.provider
);
```

### Get tradable pairs

```ts
const pairsList = await orionUnit.orionAggregator.getPairsList();
```

### Get swap info

```ts
const swapInfo = await orionUnit.orionAggregator.getSwapInfo(
  // Use 'exactSpend' when 'amount' is how much you want spend. Use 'exactReceive' otherwise
  type: 'exactSpend',
  assetIn: 'ORN',
  assetOut: 'USDT',
  amount: 6.23453457,
);
```

### Place order in Orion Aggregator

```ts
const { orderId } = await orionUnit.orionAggregator.placeOrder(
  {
    senderAddress: "0x61eed69c0d112c690fd6f44bb621357b89fbe67f",
    matcherAddress: "0xfbcad2c3a90fbd94c335fbdf8e22573456da7f68",
    baseAsset: "0xf223eca06261145b3287a0fefd8cfad371c7eb34",
    quoteAsset: "0xcb2951e90d8dcf16e1fa84ac0c83f48906d6a744",
    matcherFeeAsset: "0xf223eca06261145b3287a0fefd8cfad371c7eb34",
    amount: 500000000,
    price: 334600000,
    matcherFee: 29296395, // Orion Fee + Network Fee
    nonce: 1650345051276,
    expiration: 1652850651276,
    buySide: 0,
    isPersonalSign: false, // https://docs.metamask.io/guide/signing-data.html#a-brief-history
  },
  false // Place in internal orderbook
);
```

### Orion Aggregator WebSocket

Available subscriptions:

```ts
ASSET_PAIRS_CONFIG_UPDATES_SUBSCRIBE = 'apcus',
AGGREGATED_ORDER_BOOK_UPDATES_SUBSCRIBE = 'aobus',
ADDRESS_UPDATES_SUBSCRIBE = 'aus', // Orders history, balances info
BROKER_TRADABLE_ATOMIC_SWAP_ASSETS_BALANCE_UPDATES_SUBSCRIBE = 'btasabus',
SWAP_SUBSCRIBE = 'ss', // Swap info updates
```

Example:

```ts
import { services } from "@orionprotocol/sdk";
import { v4 as uuidv4 } from "uuid";

const swapRequestId = uuidv4();
orionUnit.orionAggregator.ws.subscribe(
  services.orionAggregator.ws.SubscriptionType.SWAP_SUBSCRIBE,
  {
    payload: {
      d: swapRequestId, // generated by client
      i: assetIn, // asset in
      o: assetOut, // asset out
      e: true, // true when type of swap is exactSpend, can be omitted (true by default)
      a: 5.62345343, // amount
    },
    // Handle data update in your way
    callback: (swapInfo) => {
      switch (swapInfo.kind) {
        case "exactSpend":
          console.log(swapInfo.availableAmountOut);
          break;
        case "exactReceive":
          console.log(swapInfo.availableAmountOut);
          break;
      }
    },
  }
);
```