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# dml-pipe

A pipe represents how much money the user wants to come in or go out of a
bucket. In other words, it represents a flow of money from the tank to a bucket.

| Field      | Type   | Description                                              |
| ---------- | ------ | -------------------------------------------------------- |
| id         | string |                                                          |
| amount     | number | The amount of money flowing through the pipe.            |
| period     | string | How long it takes for `amount` to flow through the pipe. |
| bucket_id  | string | The ID of the bucket to which this pipe corresponds.     |
| start_date | date   | The first date on which money flowed through the pipe.   |

Constraints:

- `period` must be one of these options:
  - `day`
  - `week`
  - `month`
  - `year`

Sources: req-017, req-037, req-088, req-114, req-116