> For the complete documentation index, see [llms.txt](https://seer-3.gitbook.io/seer-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://seer-3.gitbook.io/seer-documentation/developers/intro.md).

# 📝 Intro

<https://github.com/seer-pm/demo/tree/main>

### Actors and actions

1. Market Creator:
   * Action: Initiates the creation of a new prediction market.
   * Can be performed by: Any address.
2. Token Holder:
   * Action: Interacts with <mark style="color:red;">`Router`</mark> to split and merge outcome tokens, as well as redeeming them upon market resolution. Buys and sells outcome tokens on a third-party decentralized exchange (DEX).
   * Can be performed by: Any address with sufficient collateral/outcome tokens.
3. Liquidity Provider:
   * Action: Provides initial liquidity to the market by splitting positions and adding liquidity to a DEX.
   * Can be performed by: Any address with sufficient collateral/outcome tokens.
4. Answerer:
   * Action: Provides answers to the market questions or challenges provided answers if believed to be incorrect.
   * Can be performed by: Any address meeting the criteria set by the question (current bond required to submit an answer or arbitration fee for raising a dispute).
5. Market Resolver:
   * Action: Resolves the market by calling <mark style="color:red;">`Market.resolve()`</mark> or <mark style="color:red;">`RealityProxy.resolve(market)`</mark> after the reality questions are finalized.
   * Can be performed by: Any address, as long as the questions are finalized.

### Seer contracts

1. MarketFactory: Creates new prediction markets.
2. Market: Represents an individual prediction market.
3. MarketView: Contains convenient view functions to retrieve information of one or more markets
4. Router: Handles splitting, merging, and redeeming of positions.
5. GnosisRouter: Router implementation with functions to use xDAI to split, merge and redeem outcome tokens on Gnosis Chain.
6. MainnetRouter: Router implementation with functions to use DAI to split, merge and redeem outcome tokens on Ethereum Mainnet.
7. RealityProxy: Resolves the market based on the answer provided.

### External services

1. Third-Party Decentralized Exchange: Facilitates trading of outcome tokens.
2. Kleros: Handles arbitration in case of disputes.
3. Reality: Oracle system for resolving market outcomes.
4. ConditionalTokens: Creates and manages outcome tokens.
5. Wrapped1155Factory: Wraps ERC1155 tokens to ERC20 tokens.