# Protocol Documentation
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## Table of Contents

- [ape/types.proto](#ape/types.proto)

  - Messages
      - [Chain](#frostfs.v2.ape.Chain)
      - [ChainTarget](#frostfs.v2.ape.ChainTarget)


- [Scalar Value Types](#scalar-value-types)



<a name="ape/types.proto"></a>
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## ape/types.proto


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<a name="frostfs.v2.ape.Chain"></a>

### Message Chain
Chain is a chain of rules defined for a specific target.


| Field | Type | Label | Description |
| ----- | ---- | ----- | ----------- |
| raw | [bytes](#bytes) |  | Raw representation of a serizalized rule chain. |


<a name="frostfs.v2.ape.ChainTarget"></a>

### Message ChainTarget
ChainTarget is an object to which a rule chain is defined.


| Field | Type | Label | Description |
| ----- | ---- | ----- | ----------- |
| type | [TargetType](#frostfs.v2.ape.TargetType) |  |  |
| name | [string](#string) |  |  |

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<a name="frostfs.v2.ape.TargetType"></a>

### TargetType
TargetType is a type target to which a rule chain is defined.

| Name | Number | Description |
| ---- | ------ | ----------- |
| UNDEFINED | 0 |  |
| NAMESPACE | 1 |  |
| CONTAINER | 2 |  |
| USER | 3 |  |
| GROUP | 4 |  |


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## Scalar Value Types

| .proto Type | Notes | C++ Type | Java Type | Python Type |
| ----------- | ----- | -------- | --------- | ----------- |
| <a name="double" /> double |  | double | double | float |
| <a name="float" /> float |  | float | float | float |
| <a name="int32" /> int32 | Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead. | int32 | int | int |
| <a name="int64" /> int64 | Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead. | int64 | long | int/long |
| <a name="uint32" /> uint32 | Uses variable-length encoding. | uint32 | int | int/long |
| <a name="uint64" /> uint64 | Uses variable-length encoding. | uint64 | long | int/long |
| <a name="sint32" /> sint32 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s. | int32 | int | int |
| <a name="sint64" /> sint64 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s. | int64 | long | int/long |
| <a name="fixed32" /> fixed32 | Always four bytes. More efficient than uint32 if values are often greater than 2^28. | uint32 | int | int |
| <a name="fixed64" /> fixed64 | Always eight bytes. More efficient than uint64 if values are often greater than 2^56. | uint64 | long | int/long |
| <a name="sfixed32" /> sfixed32 | Always four bytes. | int32 | int | int |
| <a name="sfixed64" /> sfixed64 | Always eight bytes. | int64 | long | int/long |
| <a name="bool" /> bool |  | bool | boolean | boolean |
| <a name="string" /> string | A string must always contain UTF-8 encoded or 7-bit ASCII text. | string | String | str/unicode |
| <a name="bytes" /> bytes | May contain any arbitrary sequence of bytes. | string | ByteString | str |