Protocol Overview

The BendDAO Exchange Protocol repository can be found on Github here.

Main Contracts

The main contracts in Exchange Protocol and their purposes are:

BendExchange

The core contract of the Bend exchange, and main entry point into the Exchange Protocol. Most interactions will happen via the BendExchange, including:

matchAskWithTakerBid

function matchAskWithTakerBid(OrderTypes.TakerOrder takerBid, OrderTypes.MakerOrder makerAsk) external 

matchBidWithTakerAsk

function matchBidWithTakerAsk(OrderTypes.TakerOrder takerAsk, OrderTypes.MakerOrder makerBid) external nonpayable

matchAskWithTakerBidUsingETHAndWETH

function matchAskWithTakerBidUsingETHAndWETH(OrderTypes.TakerOrder takerBid, OrderTypes.MakerOrder makerAsk) external payable

Trades exist such as a combination of taker/order and bid/ask. here are four primary orders:

• MakerBid — a passive order that exists off-chain where the user wishes to acquire a NFT using a specific ERC-20 token.

• MakerAsk — a passive order that exists off-chain where the user wishes to sell a NFT for a specific ERC-20 token.

• TakerBid — an order that is executed on-chain that matches the MakerAsk, e.g., the taker accepts the offer from the maker and buys the NFT for the ERC-20 token specified.

• TakerAsk — an order that is executed on-chain that matches the MakerBid, e.g., the taker accepts the offer from the maker and sells the NFT for the ERC-20 token specified.