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import { HttpClient } from '@0xproject/connect';
import { ContractWrappers } from '@0xproject/contract-wrappers';
import { SignedOrder } from '@0xproject/order-utils';
import { ObjectMap } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import { Provider } from 'ethereum-types';
import * as _ from 'lodash';
import { AssetBuyer } from './asset_buyer';
import { constants } from './constants';
import { BasicOrderProvider } from './order_providers/basic_order_provider';
import { StandardRelayerAPIOrderProvider } from './order_providers/standard_relayer_api_order_provider';
import { assert } from './utils/assert';
import { assetDataUtils } from './utils/asset_data_utils';
import { AssetBuyerManagerError, BuyQuote, BuyQuoteRequestOpts, OrderProvider } from './types';
export class AssetBuyerManager {
// Map of assetData to AssetBuyer for that assetData
private readonly _assetBuyerMap: ObjectMap<AssetBuyer>;
/**
* Returns an array of all assetDatas available at the provided sraApiUrl
* @param sraApiUrl The standard relayer API base HTTP url you would like to source orders from.
* @param pairedWithAssetData Optional filter argument to return assetDatas that only pair with this assetData value.
*
* @return An array of all assetDatas available at the provider sraApiUrl
*/
public static async getAllAvailableAssetDatasAsync(
sraApiUrl: string,
pairedWithAssetData?: string,
): Promise<string[]> {
const client = new HttpClient(sraApiUrl);
const params = {
assetDataA: pairedWithAssetData,
perPage: constants.MAX_PER_PAGE,
};
const assetPairsResponse = await client.getAssetPairsAsync(params);
return _.uniq(_.map(assetPairsResponse.records, pairsItem => pairsItem.assetDataB.assetData));
}
/**
* Instantiates a new AssetBuyerManager instance with all available assetDatas at the provided sraApiUrl
* @param provider The Provider instance you would like to use for interacting with the Ethereum network.
* @param sraApiUrl The standard relayer API base HTTP url you would like to source orders from.
* @param networkId The ethereum network id. Defaults to 1 (mainnet).
* @param orderRefreshIntervalMs The interval in ms that getBuyQuoteAsync should trigger an refresh of orders and order states. Defaults to 10000ms (10s).
* @param expiryBufferSeconds The number of seconds to add when calculating whether an order is expired or not. Defaults to 15s.
*
* @return An promise of an instance of AssetBuyerManager
*/
public static async getAssetBuyerManagerFromStandardRelayerApiAsync(
provider: Provider,
sraApiUrl: string,
networkId: number = constants.MAINNET_NETWORK_ID,
orderRefreshIntervalMs?: number,
expiryBufferSeconds?: number,
): Promise<AssetBuyerManager> {
const contractWrappers = new ContractWrappers(provider, { networkId });
const etherTokenAssetData = assetDataUtils.getEtherTokenAssetDataOrThrow(contractWrappers);
const assetDatas = await AssetBuyerManager.getAllAvailableAssetDatasAsync(sraApiUrl, etherTokenAssetData);
const orderProvider = new StandardRelayerAPIOrderProvider(sraApiUrl);
return new AssetBuyerManager(
provider,
assetDatas,
orderProvider,
networkId,
orderRefreshIntervalMs,
expiryBufferSeconds,
);
}
/**
* Instantiates a new AssetBuyerManager instance given existing liquidity in the form of orders and feeOrders.
* @param provider The Provider instance you would like to use for interacting with the Ethereum network.
* @param orders A non-empty array of objects that conform to SignedOrder. All orders must have the same makerAssetData and takerAssetData (WETH).
* @param feeOrders A array of objects that conform to SignedOrder. All orders must have the same makerAssetData (ZRX) and takerAssetData (WETH). Defaults to an empty array.
* @param networkId The ethereum network id. Defaults to 1 (mainnet).
* @param orderRefreshIntervalMs The interval in ms that getBuyQuoteAsync should trigger an refresh of orders and order states. Defaults to 10000ms (10s).
* @param expiryBufferSeconds The number of seconds to add when calculating whether an order is expired or not. Defaults to 15s.
*
* @return An instance of AssetBuyerManager
*/
public static getAssetBuyerManagerFromProvidedOrders(
provider: Provider,
orders: SignedOrder[],
feeOrders: SignedOrder[] = [],
networkId?: number,
orderRefreshIntervalMs?: number,
expiryBufferSeconds?: number,
): AssetBuyerManager {
const assetDatas = _.map(orders, order => order.makerAssetData);
const orderProvider = new BasicOrderProvider(_.concat(orders, feeOrders));
return new AssetBuyerManager(
provider,
assetDatas,
orderProvider,
networkId,
orderRefreshIntervalMs,
expiryBufferSeconds,
);
}
/**
* Instantiates a new AssetBuyerManager instance
* @param provider The Provider instance you would like to use for interacting with the Ethereum network.
* @param assetDatas The assetDatas of the desired assets to buy (for more info: https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md).
* @param orderProvider An object that conforms to OrderProvider, see type for definition.
* @param networkId The ethereum network id. Defaults to 1 (mainnet).
* @param orderRefreshIntervalMs The interval in ms that getBuyQuoteAsync should trigger an refresh of orders and order states. Defaults to 10000ms (10s).
* @param expiryBufferSeconds The number of seconds to add when calculating whether an order is expired or not. Defaults to 15s.
*
* @return An instance of AssetBuyerManager
*/
constructor(
provider: Provider,
assetDatas: string[],
orderProvider: OrderProvider,
networkId?: number,
orderRefreshIntervalMs?: number,
expiryBufferSeconds?: number,
) {
assert.assert(assetDatas.length > 0, `Expected 'assetDatas' to be a non-empty array.`);
this._assetBuyerMap = _.reduce(
assetDatas,
(accAssetBuyerMap: ObjectMap<AssetBuyer>, assetData: string) => {
accAssetBuyerMap[assetData] = new AssetBuyer(
provider,
assetData,
orderProvider,
networkId,
orderRefreshIntervalMs,
expiryBufferSeconds,
);
return accAssetBuyerMap;
},
{},
);
}
/**
* Get an AssetBuyer for the provided assetData
* @param assetData The desired assetData.
*
* @return An instance of AssetBuyer
*/
public getAssetBuyerFromAssetData(assetData: string): AssetBuyer {
const assetBuyer = this._assetBuyerMap[assetData];
if (_.isUndefined(assetBuyer)) {
throw new Error(`${AssetBuyerManagerError.AssetBuyerNotFound}: For assetData ${assetData}`);
}
return assetBuyer;
}
/**
* Get an AssetBuyer for the provided ERC20 tokenAddress
* @param tokenAddress The desired tokenAddress.
*
* @return An instance of AssetBuyer
*/
public getAssetBuyerFromERC20TokenAddress(tokenAddress: string): AssetBuyer {
const assetData = assetDataUtils.encodeERC20AssetData(tokenAddress);
return this.getAssetBuyerFromAssetData(assetData);
}
/**
* Get a list of all the assetDatas that the instance supports
*
* @return An array of assetData strings
*/
public getAssetDatas(): string[] {
return _.keys(this._assetBuyerMap);
}
/**
* Get a `BuyQuote` containing all information relevant to fulfilling a buy.
* You can then pass the `BuyQuote` to `executeBuyQuoteAsync` to execute the buy.
*
* @param assetData The assetData that identifies the desired asset to buy.
* @param assetBuyAmount The amount of asset to buy.
* @param feePercentage The affiliate fee percentage. Defaults to 0.
* @param forceOrderRefresh If set to true, new orders and state will be fetched instead of waiting for
* the next orderRefreshIntervalMs. Defaults to false.
* @return An object that conforms to BuyQuote that satisfies the request. See type definition for more information.
*/
public async getBuyQuoteAsync(
assetData: string,
assetBuyAmount: BigNumber,
options: Partial<BuyQuoteRequestOpts>,
): Promise<BuyQuote> {
return this.getAssetBuyerFromAssetData(assetData).getBuyQuoteAsync(assetBuyAmount, options);
}
/**
* Given a BuyQuote and desired rate, attempt to execute the buy.
* @param buyQuote An object that conforms to BuyQuote. See type definition for more information.
* @param rate The desired rate to execute the buy at. Affects the amount of ETH sent with the transaction, defaults to buyQuote.maxRate.
* @param takerAddress The address to perform the buy. Defaults to the first available address from the provider.
* @param feeRecipient The address where affiliate fees are sent. Defaults to null address (0x000...000).
*
* @return A promise of the txHash.
*/
public async executeBuyQuoteAsync(
buyQuote: BuyQuote,
rate?: BigNumber,
takerAddress?: string,
feeRecipient?: string,
): Promise<string> {
return this.getAssetBuyerFromAssetData(buyQuote.assetData).executeBuyQuoteAsync(
buyQuote,
rate,
takerAddress,
feeRecipient,
);
}
}
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