@radarrelay/sdk

Radar Relay SDK

The Radar Relay SDK is a software development kit that simplifies the interactions with Radar Relay’s APIs.

SDK Reference

For a full SDK reference see: developers.radarrelay.com/sdk.

Usage

Installation

Using npm

npm install @radarrelay/sdk

Using yarn

yarn add @radarrelay/sdk

Setup & Initialize

Setup refers to the instantiation of the RadarRelay class and setup for the initialization lifecycle.

Initialize refers to the execution of the "initialization lifecycle" - A collection of asynchronous operations that hook up the wallet, set the web3 provider, and spin up the classes necessary to begin trading.

Setup and initialization of the SDK can be completed in a single call if you don't want to listen for initialization events.

import { SdkManager } from '@radarrelay/sdk';

const rr = await SdkManager.SetupAndInitializeAsync(Config); // Radar API and Wallet Configuration

Setup

Setup can be separated from initialization, which is useful if you would like to add listeners for the various initialization events.

import { SdkManager } from '@radarrelay/sdk';

const rr = SdkManager.Setup(Config); // Radar API and Wallet Configuration

Initialize

Initializing sets the desired Ethereum wallet configuration. The SDK can be initialized with three different wallet types: LightWallet, InjectedWallet, and an RpcWallet. See the below types for more information.

await SdkManager.InitializeAsync(rr);

Or directly on the SDK instance:

await rr.initializeAsync();

Wallet Configuration Types

interface SdkConfig {
  sdkInitializationTimeoutMs?: number;
}

interface EndpointConfig {
  radarRestEndpoint: string;
  radarWebsocketEndpoint: string;
}

// Injected Wallets do not require an endpoint argument if using the wallet's connection to the Ethereum network
export interface OptionalEndpointConfig {
  radarRestEndpoint?: string;
  radarWebsocketEndpoint?: string;
}

interface EthereumConfig {
  defaultGasPrice?: BigNumber;
}

interface LightWalletOptions {
  password: string;
  seedPhrase?: string;
  salt?: string;
  hdPathString?: string;
}

interface LightWalletConfig extends SdkConfig, EndpointConfig, EthereumConfig {
  wallet: LightWalletOptions; // Wallet options for a local HD wallet
  dataRpcUrl: string;  // The rpc connection used to broadcast transactions and retreive Ethereum chain state
}

interface InjectedWalletConfig extends SdkConfig, OptionalEndpointConfig, EthereumConfig {
  type: InjectedWalletType;
  web3?: Web3; // Injected web3 object (Default: window.web3)
  dataRpcUrl?: string; // Rpc connection used to broadcast transactions and retreive Ethereum chain state (Default: Injected Web3 Connection)
}

interface RpcWalletConfig extends SdkConfig, EndpointConfig, EthereumConfig {
  rpcUrl: string; // The RPC connection to an unlocked node
}

Events

Anything that triggers state changes (like changing the network, or a fill) fires an event that you can listen to via the events object.

rr.events.on(
  EventName.Loading |
  EventName.EthereumInitialized |
  EventName.EthereumNetworkIdInitialized |
  EventName.ZeroExInitialized |
  EventName.TokensInitialized |
  EventName.AccountInitialized |
  EventName.TradeInitialized |
  EventName.MarketsInitialized |
  EventName.TransactionPending |
  EventName.TransactionComplete |
  EventName.AddressChanged
)
rr.events.emit('see_above' | 'or emit anything', ...withSomeData)

Account Methods

Obtain account information for the current loaded wallet.

Wallet methods

exportSeedPhraseAsync(password)

Export an account wallet seed phrase.

Parameters:

Name	Type	Description
password	string	The plaintext password

Returns: Promise<string>

exportAddressPrivateKeyAsync(password)

Export a wallet address private key.

Parameters:

Name	Type	Description
password	string	The plaintext password

Returns: Promise<string>

Account information

getAvailableAddressesAsync(address)

Get available addresses for this account.

No parameters.

Returns: Promise<string[]>

setAddressAsync(address)

Set the current address in use.

Parameters:

Name	Type	Description
address	string|number	The address or address index

Returns: Promise<void>

getFillsAsync(page?, perPage?)

Get fills for the selected address that have been executed on Radar.

Parameters:

Name	Type	Description
page	number	[Optional] The page to fetch
perPage	number	[Optional] The number of fills per page

Returns: Promise<RadarFill>

getOrdersAsync(page?, perPage?)

Get orders for the selected address that have been placed on Radar.

Parameters:

Name	Type	Description
page	number	[Optional] The page to fetch
perPage	number	[Optional] The number of fills per page

Returns: Promise<RadarSignedOrder[]>

ETH / token utilities

getEthBalanceAsync()

Get ETH balance for the current selected address.

No parameters.

Returns: Promise<BigNumber>

transferEthAsync(toAddress, perPage, opts?)

Transfer ETH to another address.

Parameters:

Name	Type	Description
toAddress	string	The address to transfer to
amount	number	The amount of ETH to transfer
opts	Opts	[Optional] The transaction options

Returns: Promise<TransactionReceiptWithDecodedLogs | string>

wrapEthAsync(amount, opts?)

Wrap ETH to convert it to WETH.

Parameters:

Name	Type	Description
amount	number	The amount of ETH to wrap
opts	Opts	[Optional] The transaction options

Returns: Promise<TransactionReceiptWithDecodedLogs | string>

unwrapEthAsync(amount, opts?)

Unwrap WETH to convert it to ETH.

Parameters:

Name	Type	Description
amount	number	The amount of ETH to unwrap
opts	Opts	[Optional] The transaction options

Returns: Promise<TransactionReceiptWithDecodedLogs | string>

getTokenBalanceAsync(tokenAddress)

Get balance of a token for the current selected address.

Parameters:

Name	Type	Description
address	string	The token address

Returns: Promise<BigNumber>

getTokenAllowanceAsync(tokenAddress)

Get a token allowance.

Parameters:

Name	Type	Description
address	string	The token address

Returns: Promise<BigNumber>

setTokenAllowanceAsync(tokenAddress, amount, opts?)

Set a token allowance.

Parameters:

Name	Type	Description
tokenAddress	string	The token address
amount	number	The allowance amount
opts	Opts	[Optional] The transaction options

Returns: Promise<TransactionReceiptWithDecodedLogs | string>

transferTokenAsync(tokenAddress, toAddress, amount, opts?)

Set a token allowance.

Parameters:

Name	Type	Description
tokenAddress	string	The token address
toAddress	string	The address to transfer to
amount	number	The amount of token to transfer
opts	Opts	[Optional] The transaction options

Returns: Promise<TransactionReceiptWithDecodedLogs | string>

Market methods

Fetching specific markets

rr.markets.getAsync(marketId)

Fetch a single market by its ID or a group of markets by passing a list of IDs.

Parameters:

Name	Type	Description
marketId	string | string[]	A market ID or list of market IDs in the format of {base}-{quote}. e.g. 'ZRX-WETH' or ['ZRX-WETH', 'DAI-WETH']

Returns: Promise<Market | Map<string, Market>> - The Map key is mapped to the market's ID.

Fetching pages of markets

rr.markets.getNextPageAsync()

Fetch the next 100 markets.

No parameters.

Returns: Promise<Map<string, Market>> - The Map key is mapped to the market's ID.

rr.markets.getPageAsync(page, perPage)

Fetch a specific page of markets.

Parameters:

Name	Type	Description
page	number	The page to fetch.
perPage	number	The number of results per page to query.

Returns: Promise<Map<string, Market>> - The Map key is mapped to the market's ID.

Market class methods

A Market exposes all the following instance vars:

{
  id: string;
  displayName: string;
  baseTokenAddress: string;
  quoteTokenAddress: string;
  baseTokenDecimals: number;
  quoteTokenDecimals: number;
  minOrderSize: BigNumber;
  maxOrderSize: BigNumber;
  quoteIncrement: number;
  score: number; // A measure of how active the market is.
}

A Market exposes all the following methods:

limitOrderAsync(type, quantity, price, expiration)

Place a limit order.

Parameters:

Name	Type	Description
type	UserOrderType	Order type of 'BUY'
quantity	BigNumber	Amount in base token
price	BigNumber	Price in quote
expiration	BigNumber	Order expiration time in seconds

Returns: Promise<Order>

marketOrderAsync(type, amount, opts?)

Execute a market order.

Parameters:

Name	Type	Description
type	UserOrderType	Order type of 'BUY'
amount	BigNumber	Amount in base token
opts	Opts	[Optional] The transaction options

Returns: Promise<TransactionReceiptWithDecodedLogs | string>

cancelOrderAsync(order, opts?)

Cancel an order.

Parameters:

Name	Type	Description
order	SignedOrder	SignedOrder to cancel
opts	Opts	[Optional] The transaction options

Returns: Promise<TransactionReceiptWithDecodedLogs | string>

getFillsAsync()

Get fills for this market.

No parameters.

Returns: Promise<RadarFill[]>

getCandlesAsync()

Get candles for this market.

No parameters.

Returns: Promise<RadarCandle[]>

getTickerAsync()

Get ticker for this market.

No parameters.

Returns: Promise<RadarTicker>

getHistoryAsync()

Get history for this market.

No parameters.

Returns: Promise<RadarHistory>

getStatsAsync()

Get stats for this market.

No parameters.

Returns: Promise<RadarStats>

subscribeAsync(topic, handlerFunc)

Parameters:

Name	Type	Description
topic	WebsocketRequestTopic	The market topic
handlerFunc	(message: any) => void	The subscription handler

Returns:

Promise<{
  requestId: number,
  subscriptionHandler: (message: any) => void,
  unsubscribe: () => void
}>

You can unsubscribe from any previously created subscriptions like so:

subscription.unsubscribe();

Setting up an Ethereum Node

Install Parity

brew install parity

Run Parity Node

parity --jsonrpc-hosts=all \
       --jsonrpc-interface=all \
       --ws-origins=all \
       --ws-hosts=all \
       --ws-interface=all \
       --chain=kovan \
       --base-path /path/for/ethereum_node_data

Unlocked Parity Node

NOTE: this is potentially dangerous, use at your own risk. Should be done on a computer free of malware and a strict firewall

Create a trading Account

~parity account new
~enter password (don't lose this)

Create Node Config File

create /path/to/parity-config.toml

[account]
unlock = ["0x000000000000000000000000000000000000"] (account address created above)
password = ["/home/{account}/.parity-account-pass"] (password saved in plain text)

Run Parity with Unlocked Account

parity --jsonrpc-hosts=all \
       --jsonrpc-interface=all \
       --ws-origins=all \
       --ws-hosts=all \
       --ws-interface=all \
       --chain=kovan \
       --config /path/to/parity-config.toml \
       --base-path /path/for/ethereum_node_data

SDK Init / State Change Lifecycle

Overview

The Ethereum and 0x.js application loading lifecycle is difficult to manage, especially when designing for optimized state changes. Specifically, changing RPC Networks, switching accounts, and updating API endpoints. To manage the lifecycle more efficiently, the Radar Relay SDK utilizes a combination of the following:

• EventEmitter
• SdkInitLifeCycle

The SdkInitLifeCycle class works as follows:

Define an array that consists of:

• event, which when triggered will then call the defined
• func the function that is called when this event is triggered (ideally the next in priority)

Once all events have fired the promise will resolve. If an error occurs along the lifecycle, the timeout will occur after 10s and reject the promise.

Each init method must trigger an event on the EventEmitter, which indicates the method is done as well as return the SdkInitLifeCycle.promise()

Life Cycle