0x is a transaction layer for the Ethereum blockchain. You can read more about them here. In the example below, we'll trade on a 0x order, which looks like this:
"order": {"signature": "0x1cdd947fd6c110d6d4204c5a3e4ad08282a79574d6fcc89e0782a2bf003a92042833fc2efd2435c89bc1ad3074ed9b1df1cc37ba8399305c84002040deca4226e002","senderAddress": "0x0000000000000000000000000000000000000000","makerAddress": "0x167f897440cfd5227f22349779841f83ddda126a","takerAddress": "0x0000000000000000000000000000000000000000","makerFee": "0","takerFee": "30000000000000000000","makerAssetAmount": "10000000000000000000000","takerAssetAmount": "20000000000000000000","makerAssetData": "0xf47261b000000000000000000000000010ef64cb79fd4d75d4aa7e8502d95c42124e434b","takerAssetData": "0xf47261b0000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2","salt": "1582812333130","exchangeAddress": "0x61935cbdd02287b511119ddb11aeb42f1593b7ef","feeRecipientAddress": "0x5265bde27f57e738be6c1f6ab3544e82cdc92a8f","expirationTimeSeconds": "1594908333","makerFeeAssetData": "0x","chainId": 1,"takerFeeAssetData": "0xf47261b000000000000000000000000010ef64cb79fd4d75d4aa7e8502d95c42124e434b"}
We'll assign the above values to a variable called offer and execute a trade on it in the example below:
This example requires an environment instance as described here.
import {ExchangeIdentifier,Hub,Trading,ZeroExV3TradingAdapter} from '@melonproject/melonjs';// your hub addressconst hubAddress = '0x05263237f43190ce0e93b48afb25dd60a03ad3c5';// the address of the fund's managerconst fundManager = '0x0b64bf0fae1b9ffa80cd880f5b82d467ee34c28e';// declare an instance of the fund's hub to access the spoke contract addressesconst hub = new Hub(environment, hubAddress);// the address of the fund's trading contractconst tradingAddress = hub.getRoutes().trading;// declare an exchange object, shape noted in /buildingblocks/environmentconst exchange = environment.getExchange(ExchangeIdentifier.ZeroExV3);// in the format from the preceeding code blockconst offer = { json };// declare the maker asset objectconst makerAsset = environment.getToken('WETH');// you'll dictate the number of makerAssets to swap for takerAssets with the appropriate number of decimalsconst quantity = new BigNumber(10).multipliedBy(new BigNumber(10).exponentiatedBy(makerAsset.decimals));// specify the gas price (refer to http://ethgasstation.info/)const gasPrice = 30000000000;// create a new isntance of the fund's Trading contractconst trading = new Trading(environment, tradingAddress);// create an instance of the fund's 0x trading adapterconst adapter = await ZeroExV3TradingAdapter.create(environment,exchange.exchange,trading);// create and execute the transactionconst transaction = adapter.takeOrder(fundManager, offer, quantity);const opts = await transaction.prepare({ gasPrice });const receipt = await transaction.send(opts);