LoopNet

This is an unofficial Loopring SDK in C# .NET 7

Important

Use with caution in production. This is being actively developed and every new version will most likely have breaking changes until 1.0.0

Documentation

You can find the documentation here.

Adding to your project

Installation

You can get LoopNet from nuget. You can run the following command while in Visual Studio to install it into your project

Install-Package LoopNet

Usage

Create the client

Create the client as follows. How you retrieve the details for the L1 Private Key and Eth Address is up to you. Be it from a file, environment variable and etc. As long as the final form is a string.

The first parameter is the chain id, it can be either 1 for MAINNET or 5 for TEST.

var loopNetClient = await LoopNetClient.CreateLoopNetClientAsync(1, "L1 Private Key", "Eth Address in 0x format");

On client creation, it will generate your Loopring Layer 2 Private Key and retrieve your Loopring API Key

Example usage - Transfer a token

Once the client has been created you can start using the various methods. Here is a token transfer

var tokenTransferResponse = await loopNetClient.PostTokenTransferAsync("0x991B6fE54d46e5e0CEEd38911cD4a8694bed386A", "LRC", 0.01m, "LRC", "LoopNet test");

This will send 0.01 LRC to 0x991B6fE54d46e5e0CEEd38911cD4a8694bed386A with the memo 'LoopNet test', fees will be paid in LRC as well.

Example usage - Trade a token

Here is a trade of 0.03852 ETH to 368 LRC

var tokens = await loopNetClient.GetExchangeTokensAsync();
var lrcToken = tokens!.Where(x => x.Symbol == "LRC").First();
var ethToken = tokens!.Where(x => x.Symbol == "ETH").First();
var ethSellToken = new Token(tokenId: ethToken.TokenId, amount: 0.03852m, decimals: ethToken.Decimals); //0.038252 ETH
var lrcBuyToken = new Token(tokenId: lrcToken.TokenId, amount: 368m, decimals: lrcToken.Decimals); //368 LRC
var tradeResult = await loopNetClient.PostOrderAsync(
        sellToken: ethSellToken, //the token to sell
        buyToken: lrcBuyToken, //the token to buy
        allOrNone: false, //if partial fills for order are enabled. only false is supported for now by the Loopring API
        fillAmountBOrS: false, //whether to fill by buy or sell token
        validUntil: 1800000000, // Unix timestamp for order expiry..
        maxFeeBips: 63, //maximum order fee
        clientOrderId: null, //arbitrary client set uniqiue order identifier
        orderType: OrderType.TAKER_ONLY,
        tradeChannel: TradeChannel.MIXED
    );

Building from source

Setup

Clone this repo and download Visual Studio 2022 with .NET 7, then open the solution file

The projects

LoopNet

LoopNet is the main class library which contains all of the neccessary methods to interact with the Loopring API.

LoopNetConsole

LoopNetConsole is a console application that you can use to play around with the methods from LoopNet. It already contains some code so you can see how to use the various methods. See here for setup.

LoopNetTests

LoopNetTests contains all of the tests. See here for setup.

Running LoopNetConsole/LoopNetTests

Setup secrets.json

You must create a JSON file called 'secrets.json' in the root of the LoopNetTests and the LoopNetConsole projects. It should look like the following:

{
  "Loopring": {
    "L1PrivateKey": "Replace with your L1 Private Key",
    "Address": "Replace with your address in 0x format"
  }
}

Do not share your L1 Private Key with anyone!!!

Your address should be in 0x format, for example: 0x36Cd6b3b9329c04df55d55D41C257a5fdD387ACd