This chapter extends the idea of a decentralized exchange from the previous chapter and shows you how to build a market maker. Market makers are intermediaries that facilitate cross-border and cross-currency transactions, by allowing remittors to convert the remitting amount into a different currency. Let's say you are working in Europe and want to remit money back to your family in India: a market maker will convert the remitting amount into Indian Rupees (INR) from Euros (EUR). Market makers are interesting, in the context of decentralized payment and remittance networks (such as Stellar and Ripple), because these networks gather the exchange rates from all the market makers on the network and allow the remittor to view them in a single platform. This platform is called the distributed exchange. This promotes competitive conversion rates and transparency. In this chapter, we'll be building a similar distributed exchange that trades US Dollars (USD), UK Pounds (GBP), and EUR. It will record offers from multiple market makers and display them in a single window. 

We will cover the following topics:

• Introducing the distributed currency trading exchange
• Building the private test Stellar network
• Creating the user accounts
• Creating trading currency assets
• Building the currency trading exchange
• Running the currency exchange