# Protocol Documentation ## Table of Contents - [service/meta.proto](#service/meta.proto) - Messages - [RequestMetaHeader](#service.RequestMetaHeader) - [ResponseMetaHeader](#service.ResponseMetaHeader) - [service/verify.proto](#service/verify.proto) - Messages - [RequestVerificationHeader](#service.RequestVerificationHeader) - [RequestVerificationHeader.Signature](#service.RequestVerificationHeader.Signature) - [Token](#service.Token) - [Token.Info](#service.Token.Info) - [Scalar Value Types](#scalar-value-types)

## service/meta.proto ### Message RequestMetaHeader RequestMetaHeader contains information about request meta headers (should be embedded into message) | Field | Type | Label | Description | | ----- | ---- | ----- | ----------- | | TTL | [uint32](#uint32) | | TTL must be larger than zero, it decreased in every NeoFS Node | | Epoch | [uint64](#uint64) | | Epoch for user can be empty, because node sets epoch to the actual value | | Version | [uint32](#uint32) | | Version defines protocol version TODO: not used for now, should be implemented in future | | Raw | [bool](#bool) | | Raw determines whether the request is raw or not | ### Message ResponseMetaHeader ResponseMetaHeader contains meta information based on request processing by server (should be embedded into message) | Field | Type | Label | Description | | ----- | ---- | ----- | ----------- | | Epoch | [uint64](#uint64) | | Current NeoFS epoch on server | | Version | [uint32](#uint32) | | Version defines protocol version TODO: not used for now, should be implemented in future |

## service/verify.proto ### Message RequestVerificationHeader RequestVerificationHeader is a set of signatures of every NeoFS Node that processed request (should be embedded into message). | Field | Type | Label | Description | | ----- | ---- | ----- | ----------- | | Signatures | [RequestVerificationHeader.Signature](#service.RequestVerificationHeader.Signature) | repeated | Signatures is a set of signatures of every passed NeoFS Node | | Token | [Token](#service.Token) | | Token is a token of the session within which the request is sent | ### Message RequestVerificationHeader.Signature | Field | Type | Label | Description | | ----- | ---- | ----- | ----------- | | Sign | [bytes](#bytes) | | Sign is signature of the request or session key. | | Peer | [bytes](#bytes) | | Peer is compressed public key used for signature. | ### Message Token User token granting rights for object manipulation | Field | Type | Label | Description | | ----- | ---- | ----- | ----------- | | info | [Token.Info](#service.Token.Info) | | Info is a grouped information about token | | Signature | [bytes](#bytes) | | Signature is a signature of session token information | ### Message Token.Info | Field | Type | Label | Description | | ----- | ---- | ----- | ----------- | | ID | [bytes](#bytes) | | ID is a token identifier. valid UUIDv4 represented in bytes | | OwnerID | [bytes](#bytes) | | OwnerID is an owner of manipulation object | | verb | [Token.Info.Verb](#service.Token.Info.Verb) | | Verb is a type of request for which the token is issued | | Address | [refs.Address](#refs.Address) | | Address is an object address for which token is issued | | Created | [uint64](#uint64) | | Created is an initial epoch of token lifetime | | ValidUntil | [uint64](#uint64) | | ValidUntil is a last epoch of token lifetime | | SessionKey | [bytes](#bytes) | | SessionKey is a public key of session key | ### Token.Info.Verb Verb is an enumeration of session request types | Name | Number | Description | | ---- | ------ | ----------- | | Put | 0 | Put refers to object.Put RPC call | | Get | 1 | Get refers to object.Get RPC call | | Head | 2 | Head refers to object.Head RPC call | | Search | 3 | Search refers to object.Search RPC call | | Delete | 4 | Delete refers to object.Delete RPC call | | Range | 5 | Range refers to object.GetRange RPC call | | RangeHash | 6 | RangeHash refers to object.GetRangeHash RPC call | ## Scalar Value Types | .proto Type | Notes | C++ Type | Java Type | Python Type | | ----------- | ----- | -------- | --------- | ----------- | | double | | double | double | float | | float | | float | float | float | | 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 | | 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 | | uint32 | Uses variable-length encoding. | uint32 | int | int/long | | uint64 | Uses variable-length encoding. | uint64 | long | int/long | | sint32 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s. | int32 | int | int | | sint64 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s. | int64 | long | int/long | | fixed32 | Always four bytes. More efficient than uint32 if values are often greater than 2^28. | uint32 | int | int | | fixed64 | Always eight bytes. More efficient than uint64 if values are often greater than 2^56. | uint64 | long | int/long | | sfixed32 | Always four bytes. | int32 | int | int | | sfixed64 | Always eight bytes. | int64 | long | int/long | | bool | | bool | boolean | boolean | | string | A string must always contain UTF-8 encoded or 7-bit ASCII text. | string | String | str/unicode | | bytes | May contain any arbitrary sequence of bytes. | string | ByteString | str |