The `AuctionCalculator` class computes taker amounts and auction rate bumps from a limit order struct. This is useful for understanding how the Dutch auction mechanism determines pricing over time.

## Key Methods

- **AuctionCalculator.fromLimitOrderV3Struct(order)** — Creates a calculator instance from a `LimitOrderV3Struct`
- **calcRateBump(blockTimestamp)** — Returns the auction rate bump at a given timestamp (in basis points)
- **calcAuctionTakingAmount(takingAmount, rateBump)** — Returns the adjusted taker amount after applying the rate bump

## LimitOrderV3Struct Fields

| Name          | Type   | Description                                                             |
| ------------- | ------ | ----------------------------------------------------------------------- |
| salt          | string | Unique value to differentiate orders with identical parameters          |
| makerAsset    | string | Token address the maker is selling                                      |
| takerAsset    | string | Token address the maker is buying                                       |
| maker         | string | Address of the order creator                                            |
| receiver      | string | Address to receive taker asset (zero address = maker address)           |
| allowedSender | string | Restricts who can fill (zero address = anyone)                          |
| makingAmount  | string | Amount of maker asset                                                   |
| takingAmount  | string | Amount of taker asset                                                   |
| offsets       | string | Byte offsets for interaction parsing                                    |
| interactions  | string | Encoded Fusion-specific data (auction points, resolvers, timing, flags) |