forked from TrueCloudLab/frostfs-api
180 lines
6 KiB
Markdown
180 lines
6 KiB
Markdown
# Protocol Documentation
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<a name="top"></a>
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## Table of Contents
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- [refs/types.proto](#refs/types.proto)
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- Messages
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- [Address](#neo.fs.v2.refs.Address)
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- [Checksum](#neo.fs.v2.refs.Checksum)
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- [ContainerID](#neo.fs.v2.refs.ContainerID)
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- [ObjectID](#neo.fs.v2.refs.ObjectID)
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- [OwnerID](#neo.fs.v2.refs.OwnerID)
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- [Signature](#neo.fs.v2.refs.Signature)
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- [Version](#neo.fs.v2.refs.Version)
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- [Scalar Value Types](#scalar-value-types)
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<a name="refs/types.proto"></a>
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<p align="right"><a href="#top">Top</a></p>
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## refs/types.proto
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<!-- end services -->
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<a name="neo.fs.v2.refs.Address"></a>
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### Message Address
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Objects in NeoFS are addressed by their ContainerID and ObjectID.
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String presentation of `Address` is the concatenation of string encoded
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`ContainerID` and `ObjectID` delimited by '/' character.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| container_id | [ContainerID](#neo.fs.v2.refs.ContainerID) | | Container identifier |
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| object_id | [ObjectID](#neo.fs.v2.refs.ObjectID) | | Object identifier |
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<a name="neo.fs.v2.refs.Checksum"></a>
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### Message Checksum
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Checksum message.
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Depending on checksum algorithm type the string presentation may vary:
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* TZ \
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Hex encoded string without `0x` prefix
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* SHA256 \
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Hex encoded string without `0x` prefix
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| type | [ChecksumType](#neo.fs.v2.refs.ChecksumType) | | Checksum algorithm type |
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| sum | [bytes](#bytes) | | Checksum itself |
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<a name="neo.fs.v2.refs.ContainerID"></a>
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### Message ContainerID
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NeoFS container identifier. Container structures are immutable and
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content-addressed.
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`ContainerID` is a 32 byte long SHA256 hash of stable-marshalled container
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message.
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String presentation is base58 encoded string.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| value | [bytes](#bytes) | | Container identifier in a binary format. |
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<a name="neo.fs.v2.refs.ObjectID"></a>
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### Message ObjectID
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NeoFS Object unique identifier. Objects are immutable and content-addressed.
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It means `ObjectID` will change if `header` or `payload` changes.
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`ObjectID` is a 32 byte long SHA256 hash of object's `header` field, which,
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in it's turn, contains hash of object's payload.
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String presentation is base58 encoded string.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| value | [bytes](#bytes) | | Object identifier in a binary format |
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<a name="neo.fs.v2.refs.OwnerID"></a>
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### Message OwnerID
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`OwnerID` is a derivative of a user's main public key. The transformation
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algorithm is the same as for Neo3 wallet addresses. Neo3 wallet address can
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be directly used as `OwnerID`.
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`OwnerID` is a 25 bytes sequence starting with Neo version prefix byte
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followed by 20 bytes of ScrptHash and 4 bytes of checksum.
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String presentation is Base58 Check Encoded string.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| value | [bytes](#bytes) | | Identifier of the container owner in a binary format |
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<a name="neo.fs.v2.refs.Signature"></a>
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### Message Signature
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Signature of something in NeoFS.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| key | [bytes](#bytes) | | Public key used for signing |
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| sign | [bytes](#bytes) | | Signature |
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<a name="neo.fs.v2.refs.Version"></a>
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### Message Version
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API version used by a node.
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String presentation is a Semantic Versioning 2.0.0 compatible version string
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with 'v' prefix. I.e. `vX.Y`, where `X` - major number, `Y` - minor number.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| major | [uint32](#uint32) | | Major API version |
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| minor | [uint32](#uint32) | | Minor API version |
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<!-- end messages -->
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<a name="neo.fs.v2.refs.ChecksumType"></a>
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### ChecksumType
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Checksum algorithm type.
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| Name | Number | Description |
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| ---- | ------ | ----------- |
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| CHECKSUM_TYPE_UNSPECIFIED | 0 | Unknown. Not used |
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| TZ | 1 | Tillich-Zemor homomorphic hash function |
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| SHA256 | 2 | SHA-256 |
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<!-- end enums -->
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## Scalar Value Types
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| .proto Type | Notes | C++ Type | Java Type | Python Type |
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| ----------- | ----- | -------- | --------- | ----------- |
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| <a name="double" /> double | | double | double | float |
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| <a name="float" /> float | | float | float | float |
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| <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 |
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| <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 |
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| <a name="uint32" /> uint32 | Uses variable-length encoding. | uint32 | int | int/long |
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| <a name="uint64" /> uint64 | Uses variable-length encoding. | uint64 | long | int/long |
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| <a name="sint32" /> sint32 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s. | int32 | int | int |
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| <a name="sint64" /> sint64 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s. | int64 | long | int/long |
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| <a name="fixed32" /> fixed32 | Always four bytes. More efficient than uint32 if values are often greater than 2^28. | uint32 | int | int |
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| <a name="fixed64" /> fixed64 | Always eight bytes. More efficient than uint64 if values are often greater than 2^56. | uint64 | long | int/long |
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| <a name="sfixed32" /> sfixed32 | Always four bytes. | int32 | int | int |
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| <a name="sfixed64" /> sfixed64 | Always eight bytes. | int64 | long | int/long |
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| <a name="bool" /> bool | | bool | boolean | boolean |
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| <a name="string" /> string | A string must always contain UTF-8 encoded or 7-bit ASCII text. | string | String | str/unicode |
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| <a name="bytes" /> bytes | May contain any arbitrary sequence of bytes. | string | ByteString | str |
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