# Overtime’s Smart Contract Architecture

Overtime offers **Sport Markets for your favorite leagues and competitions** in a totally transparent and non-custodial manner, making it stand out from the world of centralized sports books.  

This is all made possible thanks to the **smart contracts developed by Thales Protocol**.  Thales developed a process to provide on-chain liquidity and automated market making solutions for binary and ternary exclusive outcomes, all while achieving an **unprecedented level of capital efficiency** with minimal risk of toxic flow.  The only requirements needed for this novel smart contract architecture to operate successfully include on-chain data for pre-event probability of outcomes and post-event results.

<figure><img src="/files/BWhKxShGIpH2INDWfldV" alt=""><figcaption></figcaption></figure>

One key product market fit for this smart contract architecture is on-chain Sports Markets.  Overtime fills this gap with the help of Chainlink's infrastructure.  Chainlink is able to provide **robust on-chain data for sports markets** using the implied probability of various pre-game outcomes matched up with post-game results.  Overtime uses Thales' smart contract architecture which consumes Chainlink's reliable data feeds to provide anyone with a **globally accessible, permissionless and trustworthy** solution to Sport Market positioning. &#x20;

The smart contracts that power Overtime Sport Markets work together to provide a seamless experience that is easily verifiable and trustworthy.  You can learn more about the **smart contracts** **used by Overtime** to understand how we've structured our Sports Markets architecture.

The following pages will go into more detail for each of the key smart contracts:&#x20;

* [**Game Market Smart Contract**](https://app.gitbook.com/o/tK3bXPAPfH6bQqc0OTa0/s/qSlj8vWOOVBuhXhcN6iy/~/changes/93/game-market-smart-contract)
* [**Sports AMM Smart Contract**](https://app.gitbook.com/o/tK3bXPAPfH6bQqc0OTa0/s/qSlj8vWOOVBuhXhcN6iy/~/changes/93/sports-amm-smart-contract)
* [**Liquidity Provisioning Contract**](https://app.gitbook.com/o/tK3bXPAPfH6bQqc0OTa0/s/qSlj8vWOOVBuhXhcN6iy/~/changes/93/liquidity-provisioning-contract)
* [**Parlay Market and AMM Smart Contracts**](https://app.gitbook.com/o/tK3bXPAPfH6bQqc0OTa0/s/qSlj8vWOOVBuhXhcN6iy/~/changes/93/parlay-amm-and-market-contracts)

You can also view **links to each smart contract directly**, for both Optimism and Arbitrum networks, [from this page](https://app.gitbook.com/o/tK3bXPAPfH6bQqc0OTa0/s/qSlj8vWOOVBuhXhcN6iy/~/changes/93/links-to-smart-contracts). &#x20;

<figure><img src="/files/pMLWwAC2UlnWRqCwfg7F" alt=""><figcaption></figcaption></figure>


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