\section{Problem definition}
\epigraph{\textbf{mar - ket - place}

1. An open square or place in a town where markets or public sales are held.

2. The world of trade or economic activity.}{Merriam-Webster}

To combat the issues associated with centralised marketplaces, tsukiji aims to be a fully decentralised marketplace.

A marketplace is a place where public sales are held.
In our case, a marketplace is a place where people can place bids or asks.
A bid is placed when a buyer wants to buy goods for a set price.
An ask is placed when a seller wants to sell goods for a set price.

Using the example of BitTorrent communities, a transaction would occur as follows: a seller places an "ask", wanting to sell 500 MBit for €3.
An interested buyer sees the ask and requests a trade to be made.
The buyer and seller exchange information necessary for the transaction to occur (e.g. bank account numbers).
A trade is made and the original ask is taken down.

Current marketplaces are centralised.
Information passes through one central point.
This means that if this central point fails, the entire marketplace is shut down.
A decentralised system operates without such a single point.
Instead of a central server connected to several users, peers are connected to each other.
\section{Problem definition}
\epigraph{\textbf{mar - ket - place}

1. An open square or place in a town where markets or public sales are held.

2. The world of trade or economic activity.}{Merriam-Webster}

To combat the issues associated with centralised marketplaces, Tsukiji aims to be a fully decentralised marketplace.

A marketplace is a place where public sales are held.
In our case, a marketplace is a place where people can place bids or asks.
A bid is placed when a buyer wants to buy goods for a set price.
An ask is placed when a seller wants to sell goods for a set price.

Using the example of BitTorrent communities, a transaction would occur as follows: a seller places an "ask", wanting to sell 500 MBit for €3.
An interested buyer sees the ask and requests a trade to be made.
The buyer and seller exchange information necessary for the transaction to occur (e.g. bank account numbers).
A trade is made and the original ask is taken down.
A similar transaction occurs when a "bid" is placed.

Current marketplaces are centralised.
Information passes through one central point.
This means that if this central point fails, the entire marketplace is shut down.
A decentralised system operates without such a single point.
Instead of a central server connected to several users, peers are connected to each other.
If a single peer fails, this might impact the marketplace, but it will not shut it down.

For a network of such peers to exist, peers first have to find each other.
Peer discovery is generally done by exchanging information about other peers.
When a peer first signs on, it knows of no other peers.
We can bootstrap its network by having them connect to a predefined set of super peers, who are known to be well connected.
From there, they can exchange information about other peers.
Update problem definition with a paragraph on peer discovery + additional clarifying sentences.
Update problem definition with a paragraph on peer discovery + additional clarifying sentences.
