> For the complete documentation index, see [llms.txt](https://betfin.gitbook.io/betfin-public/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://betfin.gitbook.io/betfin-public/smartcontracts-description/predict-contract.md).

# Predict Contract

The `Predict.sol` contract is one of Betfin [Games](broken://pages/aKsdvd4ShPBzesPkK1Nd) that facilitates prediction games. It is designed to work with other contracts, including [`PredictGame`](broken://pages/DSYdzKnBqeIpPNpVueEd) for individual prediction games and [`ConservativeStaking`](broken://pages/AK1FvVYNuJbyF2rraf0t) for staking mechanisms. This documentation outlines the key functionalities and components of the `Predict` contract.

### Key Components

#### State Variables

* `core`: An `immutable` reference to the [`Core`](broken://pages/1Qngro7f28fSq5sUYJak) contract, central to the ecosystem.
* `staking`: An `immutable` reference to the [`ConservativeStaking`](broken://pages/AK1FvVYNuJbyF2rraf0t) contract, for staking functionalities.
* [`games`](broken://pages/DSYdzKnBqeIpPNpVueEd): An `address[]` private array holding addresses of all prediction game contracts.

#### Events

* `GameCreated(address indexed game)`: Emitted when a new prediction game contract is created.
* `GameDeactivated(address indexed game)`: Emitted when a prediction game contract is deactivated.
* `GameActivated(address indexed game)`: Emitted when a prediction game contract is activated.
* **placeBet (internal)**: Transfers the bet amount to the game contract and calls `placeBet` on the specified `PredictGame`. This is used by the public `placeBet` function after validations.

### Functions

* **addGame**: Creates a new `PredictGame` contract with specified parameters, activates it, and emits `GameCreated`. It performs several checks to ensure valid parameters.
* **deactivate**: Deactivates a specified prediction game contract by calling its `deactivate` function and emits `GameDeactivated`.
* **activate**: Activates a specified prediction game contract by calling its `activate` function and emits `GameActivated`.
* **placeBet**: Places a bet on a specified prediction game. It transfers the bet amount (minus a fee) to the game contract and calls `placeBet` on the specified `PredictGame`.