# Appendix

Constants

* `MIN_STAKE`: 1000 (tokens).

Mappings

* `oracleAddresses`: uint256 → address.
* `duels`: uint256 → Duel.
* `forStakesDuel`, `againstStakesDuel`, `forStakesUsdc`, `againstStakesUsdc`: uint256 (duelId) → address → uint256.

Interfaces

* `PriceOracle`: Chainlink's `latestRoundData`.
* Standard IERC20, IUniswapV2Router02.
