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diff --git a/packages/website/md/docs/asset_buyer/usage.md b/packages/website/md/docs/asset_buyer/usage.md new file mode 100644 index 000000000..6462d938e --- /dev/null +++ b/packages/website/md/docs/asset_buyer/usage.md @@ -0,0 +1,39 @@ +**Construction** + +Connecting to a standard relayer API compliant url: + +```typescript +const provider = web3.currentProvider; +const apiUrl = 'https://api.relayer.com/v2'; +const assetBuyer = AssetBuyer.getAssetBuyerForStandardRelayerAPIUrl(provider, apiUrl); +``` + +Providing your own orders: + +```typescript +const provider = web3.currentProvider; +const orders = []; // get these from your own API, a relayer, a friend, from anywhere +const assetBuyer = AssetBuyer.getAssetBuyerForProvidedOrders(provider, orders); +``` + +**Get a quote** + +A [BuyQuote](#types-BuyQuote) object contains enough information to display buy information to an end user + +```typescript +const erc20TokenAddress = '0x5fa3c....'; +const amountToBuy = new BigNumber(50000000000000000000); +const buyQuote = await assetBuyer.getBuyQuoteForERC20TokenAddressAsync(erc20TokenAddress, amountToBuy); +const quoteInfo = buyQuote.worstCaseQuoteInfo; +console.log(quoteInfo.ethAmount); // the total amount the user needs to pay to buy the desired amount (including ZRX fees) +console.log(quoteInfo.feeAmount); // a portion of the total ethAmount above that was used to buy affiliate fees +console.log(quoteInfo.ethPerAssetPrice); // the rate that this quote provides (e.g. 0.0035ETH / REP) +``` + +**Perform a buy** + +Pass the [BuyQuote](#types-BuyQuote) object from above back to the assetBuyer in order to initiate the buy transaction + +```typescript +const txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote); // the hash of the transaction submitted to the Ethereum network +``` |