[#38] Change ObjectID format from UUID to Hash

NeoFS Object are now Content-addressed. It means the Object's address depends on
it's content. ObjectID is now calculated as hash of Header, which contains a
hash of payload. If either if Object's payload of Headers change, the ID will
also change.

Signed-off-by: Stanislav Bogatyrev <stanislav@nspcc.ru>

acl/types.proto

@@ -56,8 +56,7 @@ message EACLRecord {
     enum Header {
       HEADER_UNKNOWN = 0;
       REQUEST = 1;
-      OBJECT_SYSTEM = 2;
+      OBJECT = 2;
-      OBJECT_USER = 3;
     }
 
     // Header carries type of header.

container/types.proto

@@ -5,8 +5,8 @@ package container;
 option go_package = "github.com/nspcc-dev/neofs-api-go/container";
 option csharp_namespace = "NeoFS.API.Container";
 
-import "refs/types.proto";
 import "netmap/types.proto";
+import "refs/types.proto";
 
 // Container is a structure that defines object placement behaviour. Objects
 // can be stored only within containers. They define placement rule, attributes

object/service.proto

@@ -54,7 +54,7 @@ service Service {
 
 message GetRequest {
   message Body {
-    // Carries the address of the requested object.
+    // Address of the requested object.
     refs.Address address = 1;
 
     // Carries the raw option flag of the request.
@@ -62,7 +62,6 @@ message GetRequest {
     // that are physically stored on the server.
     bool raw = 2;
   }
-
   // Body of get object request message.
   Body body = 1;
 
@@ -77,16 +76,23 @@ message GetRequest {
 
 message GetResponse {
   message Body {
+    // Initialization parameters of the object got from NeoFS.
+    message Init {
+      // Object ID
+      refs.ObjectID object_id = 1;
+      // Object signature
+      service.Signature signature =2;
+      // Object header.
+      Header header = 3;
+    }
     // Carries the single message of the response stream.
     oneof ObjectPart {
-      // Carries the object header.
+      // Initialization parameters of the object stream.
-      Header header = 1;
+      Init init =1;
-
+      // Part of the object payload.
-      // Carries part of the object payload.
       bytes chunk = 2;
     }
   }
-
   // Body of get object response message.
   Body body = 1;
 
@@ -104,25 +110,26 @@ message PutRequest {
   message Body {
     // Groups initialization parameters of object placement in NeoFS.
     message Init {
-      // Carries the header of the object to save in the system.
+      // Object ID, where available
-      Header header = 1;
+      refs.ObjectID object_id = 1;
-
+      // Object signature, were available
-      // Carries the number of the object copies to store
+      service.Signature signature =2;
-      // within the RPC call. Default zero value is processed according
+      // Header of the object to save in the system.
-      // to the container placement rules.
+      Header header = 3;
-      uint32 copies_number = 2;
+      // Number of the object copies to store within the RPC call.
+      // Default zero value is processed according to the
+      // container placement rules.
+      uint32 copies_number = 4;
     }
 
     // Carries the single part of the query stream.
-    oneof Part {
+    oneof ObjectPart {
       // Carries the initialization parameters of the object stream.
       Init init = 1;
-
       // Carries part of the object payload.
       bytes chunk = 2;
     }
   }
-
   // Body of put object request message.
   Body body = 1;
 
@@ -141,7 +148,6 @@ message PutResponse {
     // It is used to access an object in the container.
     refs.ObjectID object_id = 1;
   }
-
   // Body of put object response message.
   Body body = 1;
 
@@ -159,11 +165,9 @@ message DeleteRequest {
   message Body {
     // Carries the address of the object to be deleted.
     refs.Address address = 1;
-
     // Carries identifier the object owner.
     refs.OwnerID owner_id = 2;
   }
-
   // Body of delete object request message.
   Body body = 1;
 
@@ -196,18 +200,15 @@ message DeleteResponse {
 
 message HeadRequest {
   message Body {
-    // Carries the address of the object with the requested header.
+    // Address of the object with the requested header.
     refs.Address address = 1;
-
+    // Return only minimal header subset
-    // Carries the option to crop header to main part.
     bool main_only = 2;
-
     // Carries the raw option flag of the request.
     // Raw request is sent to receive only the headers of the objects
     // that are physically stored on the server.
     bool raw = 3;
   }
-
   // Body of head object request message.
   Body body = 1;
 
@@ -222,10 +223,25 @@ message HeadRequest {
 
 message HeadResponse {
   message Body {
-    // Carries the requested object header.
+    message ShortHeader {
-    Header header = 1;
+      // Object format version.
+      service.Version version = 1;
+      // Epoch when the object was created
+      uint64 creation_epoch = 2;
+      // Object's owner
+      refs.OwnerID owner_id = 3;
+      // Type of the object payload content
+      ObjectType object_type = 4;
+      // Size of payload in bytes.
+      // 0xFFFFFFFFFFFFFFFF means `payload_length` is unknown
+      uint64 payload_length = 5;
+    }
+    // Carries the requested object header or it's part
+    oneof Head{
+      Header header = 1;
+      ShortHeader short_header = 2;
+    }
   }
-
   // Body of head object response message.
   Body body = 1;
 

object/types.proto

@@ -6,128 +6,80 @@ option go_package = "github.com/nspcc-dev/neofs-api-go/object";
 option csharp_namespace = "NeoFS.API.Object";
 
 import "refs/types.proto";
+import "service/meta.proto";
 import "service/verify.proto";
 
-// Header groups the information about the NeoFS object.
+// Type of the object payload content
+enum ObjectType {
+  // Just a normal object
+  REGULAR = 0;
+  // Used internally to identify deleted objects
+  TOMBSTONE = 1;
+  // Identifies that the object holds StorageGroup information
+  STORAGE_GROUP = 2;
+}
+
 message Header {
-  // Main groups mandatory information about the object.
+  // Object's container
-  // Message fields are presented in all NeoFS objects.
+  refs.ContainerID container_id = 1;
-  message Main {
+  // Object's owner
-    // payload_length carries length of the object payload.
+  refs.OwnerID owner_id = 2;
-    // Each object has a fixed payload length since it's immutable.
+  // Epoch when the object was created
-    uint64 payload_length = 1;
+  uint64 creation_epoch = 3;
-    // address carries object address in the NeoFS system.
+  // Object format version.
-    // It encapsulates the object and the container identifiers.
+  // Effectively the version of API library used to create particular object
-    refs.Address address = 2;
+  service.Version version = 4;
-    // owner_id carries identifier of the object owner.
+  // Size of payload in bytes.
-    refs.OwnerID owner_id = 3;
+  // 0xFFFFFFFFFFFFFFFF means `payload_length` is unknown
-  }
+  uint64 payload_length = 5;
+  // Hash of payload bytes
+  bytes payload_hash = 6;
+  ObjectType object_type = 7;
+  // Homomorphic hash of the object payload.
+  bytes homomorphic_hash = 8;
+  // Session token, if it was used during Object creation.
+  // Need it to verify integrity and authenticity out of Request scope.
+  service.SessionToken session_token = 9;
 
-  // Main carries the main part of the header.
+  // Attribute groups the user-defined Key-Value pairs attached to the object
-  // Main MUST NOT be NULL.
-  Main main = 1;
-
-  // Extended groups additional information about the object.
-  // It encapsulates both user and system attributes needed to regulate
-  // the NeoFS sub-systems.
-  message Extended {
-    // Integrity groups evidence of the integrity of an object's structure.
-    message Integrity {
-      // payload_checksum carries the checksum of object payload bytes.
-      // Changing any byte of the payload changes the checksum.
-      // It is calculated as a SHA-256 hash over payload bytes.
-      bytes payload_checksum = 1;
-
-      // header_checksum carries checksum of the object header structure.
-      // It covers all object attributes. Changing any field of the object except
-      // CreatorKey and ChecksumSignature changes the checksum.
-      // payload_checksum and header_checksum cannot be merged due to the need
-      // to verify the header in the absence of a payload (e.g. in object.Head rpc).
-      // It is calculated as a SHA-256 hash over marshaled object header
-      // with cut creator_key and checksum_signature.
-      bytes header_checksum = 2;
-
-      // session_token carries token of the session within which the object was created.
-      // If session token is presented in object, it acts as the user's proof of the
-      // correctness of the creator_key.
-      service.SessionToken session_token = 3;
-
-      // creator_key carries public key of the object creator in a binary format.
-      bytes creator_key = 4;
-
-      // checksum_signature carries signature of the structure checksum by the object creator.
-      bytes checksum_signature = 5;
-    }
-
-    // integrity carries object integrity evidence.
-    Integrity integrity = 1;
-
-    // Attribute groups the parameters of the object attributes.
   message Attribute {
-      // key carries the string key to the object attribute.
+    // string key to the object attribute
     string key = 1;
-
+    // string value of the object attribute
-      // value carries the string value of the object attribute.
     string value = 2;
   }
+  repeated Attribute attributes = 10;
 
-    // attributes carries list of the object attributes in a string key-value format.
+  // Information about spawning the objects through a payload splitting.
-    repeated Attribute attributes = 2;
-
-    // creation_epoch carries number of NeoFS epoch on which the object was created.
-    uint64 creation_epoch = 3;
-
-    // Tombstone groups the options for deleting an object.
-    message Tombstone {
-    }
-
-    // Tombstone marks the object to be deleted.
-    Tombstone tombstone = 4;
-
-    // homomorphic_hash carries homomorphic hash of the object payload.
-    bytes homomorphic_hash = 5;
-
-    // StorageGroup groups meta information about a storage group.
-    message StorageGroup {
-    }
-
-    // StorageGroup marks an object containing information about a storage group.
-    StorageGroup storage_group = 6;
-
-    // Split groups information about spawning the object through a payload
-    // splitting.
   message Split {
-      // Parent carries identifier of the origin object.
+    // Identifier of the origin object.
+    // Parent and children objects must be within the same container.
+    // Parent object_id is known only to the minor child.
     refs.ObjectID parent = 1;
-
     // Previous carries identifier of the left split neighbor.
     refs.ObjectID previous = 2;
-
+    // `signature` field of the parent object. Used to reconstruct parent.
-      // Next carries identifier of the right split neighbor.
+    service.Signature parent_signature = 3;
-      refs.ObjectID next = 3;
+    // `header` field of the parent object. Used to reconstruct parent.
-
+    Header parent_header = 4;
-      // Children carries list of identifiers of the objects generated by
+    // Children carries list of identifiers of the objects generated by splitting the current.
-      // splitting the current.
+    repeated refs.ObjectID children = 5;
-      repeated refs.ObjectID children = 4;
-
-      // Origin carries the header of the origin object.
-      Header origin = 5;
   }
-
+  // Position of the object in the split hierarchy.
-    // Split carries the position of the object in the split hierarchy.
+  Split split = 11;
-    Split split = 7;
-  }
-
-  // Extended carries the additional part of the header.
-  Extended extended = 2;
 }
 
-// Object groups the information about the NeoFS object.
+// Object structure.
-// It consists of payload data with additional service information.
 message Object {
-  // Header carries the object header.
+  // Object's unique identifier.
-  Header header = 1;
+  // Object is content-addressed. It means id will change if header or payload
-
+  // changes. It's calculated as a hash of header field, which contains hash of
-  // Payload carries the object payload bytes.
+  // object's payload
-  bytes payload = 2;
+  refs.ObjectID object_id = 1;
+  // Signed object_id
+  service.Signature signature = 2;
+  // Object metadata headers
+  Header header = 3;
+  // Payload bytes.
+  bytes payload = 4;
 }

refs/types.proto

@@ -9,18 +9,17 @@ option csharp_namespace = "NeoFS.API.Refs";
 message Address {
   // container_id carries container identifier.
   ContainerID container_id = 1;
-
   // object_id carries object identifier.
   ObjectID object_id = 2;
 }
 
-// ObjectID groups information about the NeoFS object identifier.
+// NeoFS object identifier.
 message ObjectID {
   // value carries the object identifier in a binary format.
   bytes value = 1;
 }
 
-// ContainerID groups information about the NeoFS container identifier.
+// NeoFS container identifier.
 message ContainerID {
   // value carries the container identifier in a binary format.
   bytes value = 1;

service/meta.proto

@@ -5,6 +5,14 @@ package service;
 option go_package = "github.com/nspcc-dev/neofs-api-go/service";
 option csharp_namespace = "NeoFS.API.Service";
 
+// Represents API version used by node.
+message Version {
+  // Major API version.
+  uint32 major = 1;
+  // Minor API version.
+  uint32 minor = 2;
+}
+
 // RequestMetaHeader contains information about request meta headers.
 message RequestMetaHeader {
   // Carries maximum number of nodes in the request route.

service/verify.proto

@@ -8,17 +8,16 @@ option csharp_namespace = "NeoFS.API.Service";
 import "acl/types.proto";
 import "refs/types.proto";
 
+message Signature {
+  // Public key used for signing.
+  bytes key = 1;
+  // Signature
+  bytes sign = 2;
+}
+
 // RequestVerificationHeader is a set of signatures of every NeoFS Node that
 // processed request.
 message RequestVerificationHeader {
-  message Signature {
-    // Key is compressed public key used for signature.
-    bytes key = 1;
-
-    // Sign is signature of the request or session key.
-    bytes sign = 2;
-  }
-
   // Signatures is a set of signatures of every passed NeoFS Node
   repeated Signature signatures = 1;