logos-storage-docs-obsidian/10 Notes/Databse migration (AI) to accomodate Codex extensions.md

**Q: Where does `protobuf.ApplicationMetadataMessage_COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK` come from?**

Summarized conversation historyLooking at the code, `protobuf.ApplicationMetadataMessage_COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK` appears to be a constant from the protobuf package. Let me search for where this is defined. 

Searched text for `COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK`, 2 results

Now let me look at the protobuf file to see the full context: 

Searched text for `enum Type` (`**/protocol/protobuf/application_metadata_message.proto`), 1 result

Searched text for `COMMUNITY_MESSAGE_ARCHIVE` (`**/protocol/protobuf/application_metadata_message.proto`), 1 result

Let me see more context around this enum definition: 

Searched text for `(COMMUNITY_MESSAGE_ARCHIVE|= 4[0-9];|= 5[0-9];)` (`**/protocol/protobuf/application_metadata_message.proto`), 20 results

Now let me check if there's a similar constant for INDEX_CID: 

Searched text for `COMMUNITY_MESSAGE_ARCHIVE_INDEX_CID`, 1 result

Let me check if this constant exists in the protobuf file: 

Searched text for `INDEX_CID` (`**/protocol/protobuf/application_metadata_message.proto`), no results

It seems like `COMMUNITY_MESSAGE_ARCHIVE_INDEX_CID` is being used but not defined in the protobuf file. Let me check the broader context around line 60 in the protobuf file: 

Symbol `COMMUNITY_MESSAGE_ARCHIVE_INDEX_CID` not found

Let me look at the entire protobuf file to see the complete enum: 

Searched codebase for "ApplicationMetadataMessage Type enum protobuf", 22 results

Based on my search, I can now answer your question about where `protobuf.ApplicationMetadataMessage_COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK` comes from:

## Answer

`protobuf.ApplicationMetadataMessage_COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK` comes from the protobuf enum definition in application_metadata_message.proto.

Specifically, it's defined at line 60 of the proto file as:

```protobuf
COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK = 43;
```

This is part of the `Type` enum within the `ApplicationMetadataMessage` protobuf definition. When the protobuf file is compiled to Go code (using the `//go:generate protoc` directive found in `protocol/protobuf/service.go`), it generates the Go constant `protobuf.ApplicationMetadataMessage_COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK` with the value `43`.

The protobuf compilation process converts the proto enum value `COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK = 43` into the Go constant that you see being used throughout the codebase for message type identification.

**Note:** I also notice that in the code there's a reference to `COMMUNITY_MESSAGE_ARCHIVE_INDEX_CID` which doesn't appear to be defined in the protobuf file yet. This suggests it may need to be added to the enum if the Codex functionality requires it.


**Q: in persistance - current file - there are a couple of attributes operating on the communities_archive_info (table?). Is it hard to add additional attributes? For my index CIDs I need the following:**

- **last_cid which corresponds to `last_magnetlink_uri`**
- **indexcid_clock => `magnetlink_clock`**

**What is this clock used for?**

Looking at the persistence.go file, I can see that the `communities_archive_info` table is used to store archive-related information for communities. Let me analyze the existing structure and answer your questions.

## Current `communities_archive_info` table structure

Based on the methods in the file, the table appears to have these columns:
- `community_id` (string)
- `magnetlink_clock` (uint64)
- `last_magnetlink_uri` (string)
- `last_message_archive_end_date` (uint64)

## Adding new attributes

It should **not be hard** to add your new attributes. You would need to:

1. **Add the new columns to the table schema** (likely in a migration file)
2. **Add corresponding methods** similar to the existing ones

For your requirements:
- `last_cid` (corresponds to `last_magnetlink_uri`)
- `indexcid_clock` (corresponds to `magnetlink_clock`)

You could add methods like:

```go
// Get methods
func (p *Persistence) GetLastSeenIndexCid(communityID types.HexBytes) (string, error) {
    var indexCid string
    err := p.db.QueryRow(`SELECT last_cid FROM communities_archive_info WHERE community_id = ?`, communityID.String()).Scan(&indexCid)
    if err == sql.ErrNoRows {
        return "", nil
    }
    return indexCid, err
}

func (p *Persistence) GetIndexCidMessageClock(communityID types.HexBytes) (uint64, error) {
    var indexCidClock uint64
    err := p.db.QueryRow(`SELECT indexcid_clock FROM communities_archive_info WHERE community_id = ?`, communityID.String()).Scan(&indexCidClock)
    if err == sql.ErrNoRows {
        return 0, nil
    }
    return indexCidClock, err
}

// Update methods
func (p *Persistence) UpdateLastSeenIndexCid(communityID types.HexBytes, indexCid string) error {
    _, err := p.db.Exec(`UPDATE communities_archive_info SET last_cid = ? WHERE community_id = ?`,
        indexCid, communityID.String())
    return err
}

func (p *Persistence) UpdateIndexCidMessageClock(communityID types.HexBytes, clock uint64) error {
    _, err := p.db.Exec(`UPDATE communities_archive_info SET indexcid_clock = ? WHERE community_id = ?`,
        clock, communityID.String())
    return err
}
```

## What is the clock used for?

The **clock** is a **logical timestamp** used for:

1. **Message ordering** - Ensures messages are processed in the correct order
2. **Conflict resolution** - When multiple nodes update the same data, the higher clock value wins
3. **Synchronization** - Helps determine which updates are newer when syncing between devices/nodes
4. **Deduplication** - Prevents processing the same update multiple times

Looking at the existing code:

```go
func (p *Persistence) UpdateMagnetlinkMessageClock(communityID types.HexBytes, clock uint64) error {
```

This suggests that when a new magnetlink message is received/processed, the clock value is updated to track the latest state. This is common in distributed systems to maintain consistency without requiring synchronized system clocks.

## Next steps

You'll need to:
1. **Create a database migration** to add the new columns
2. **Update the `SaveCommunityArchiveInfo` method** to include the new fields
3. **Add the getter/setter methods** for your new attributes
4. **Update any initialization code** that creates archive info records

The pattern is already established in the codebase, so adding your index CID attributes should be straightforward following the same structure as the magnetlink ones.


Absolutely! I can see you've already added the four new methods for handling Index CID operations. Let me help you complete the remaining steps to fully integrate your Index CID functionality.

## Step 1: Database Migration

First, you'll need to create a database migration to add the new columns to the `communities_archive_info` table. Let me search for existing migration files to follow the pattern: 

Searched for files matching `**/migrations/**/*.sql`, 20 matches

Let me look for community-related migrations specifically: 

Searched for files matching `**/migrations/**/*communit*.sql`, 20 matches

Let me look for the communities_archive_info table creation: 

Searched text for `communities_archive_info` (`**/migrations/**/*.sql`), 2 results

Great! Let me check the structure of the existing table and the most recent migration: 

Searched codebase for "communities_archive_info table CREATE TABLE migration", 21 results

Now let me look at the actual migration files: 

Read [](file:///home/mc2/code/status-im/status-go/appdatabase/migrations/sql)

Let me check the latest migration number and the specific migration that adds the archive_info table: 

Searched codebase for "1650616788_add_communities_archives_info_table CREATE TABLE communities_archive_info", 18 results

Perfect! Now I can see the migration pattern. Let me create the migration file. Based on the existing files, I need to create a new migration with a timestamp.

## Step 1: Create Database Migration

````sql
CREATE TABLE communities_archive_info_add_index_cid_columns.sql

```sql
ALTER TABLE communities_archive_info ADD COLUMN last_cid TEXT DEFAULT "";
ALTER TABLE communities_archive_info ADD COLUMN indexcid_clock INTEGER DEFAULT 0;
```
````

Let me check the current latest migration to get the right timestamp: 

Searched text for `1757511667`, no results

Based on the file listing, the latest migration is `1757511667_add_messages-backup_enabled.up.sql`. So your new migration should have a timestamp after that. Here's what you need:

**Create the migration file:**
`/home/mc2/code/status-im/status-go/appdatabase/migrations/sql/1757511668_add_index_cid_columns_to_communities_archive_info.up.sql`

````sql
ALTER TABLE communities_archive_info ADD COLUMN last_cid TEXT DEFAULT "";
ALTER TABLE communities_archive_info ADD COLUMN indexcid_clock INTEGER DEFAULT 0;
````

## Step 2: Update `SaveCommunityArchiveInfo` Method

You'll need to modify the existing method to include the new fields. Looking at your existing code, I can see you've already added the getter/setter methods, but you need to update the initial save method:

````go
func (p *Persistence) SaveCommunityArchiveInfo(communityID types.HexBytes, clock uint64, lastArchiveEndDate uint64) error {
    _, err := p.db.Exec(`INSERT INTO communities_archive_info (magnetlink_clock, last_message_archive_end_date, community_id, last_cid, indexcid_clock) VALUES (?, ?, ?, ?, ?)`,
        clock,
        lastArchiveEndDate,
        communityID.String(),
        "", // default empty last_cid
        0,  // default indexcid_clock
    )
    return err
}
````

## Step 3: Update the Method Calls in Manager

You'll need to find where these new methods are called. Let me search for usage patterns: 

Searched text for `UpdateMagnetlinkMessageClock`, 6 results

Searched text for `UpdateLastSeenMagnetlink`, 4 results

Great! Now I can see the pattern. You'll need to add corresponding manager methods and update the handlers.

## Step 4: Add Manager Methods

Add these methods to manager.go:

````go
// Add these methods after the existing magnetlink methods around line 3730

func (m *Manager) UpdateIndexCidMessageClock(communityID types.HexBytes, clock uint64) error {
	return m.persistence.UpdateIndexCidMessageClock(communityID, clock)
}

func (m *Manager) GetIndexCidMessageClock(communityID types.HexBytes) (uint64, error) {
	return m.persistence.GetIndexCidMessageClock(communityID)
}

func (m *Manager) UpdateLastSeenIndexCid(communityID types.HexBytes, indexCid string) error {
	return m.persistence.UpdateLastSeenIndexCid(communityID, indexCid)
}

func (m *Manager) GetLastSeenIndexCid(communityID types.HexBytes) (string, error) {
	return m.persistence.GetLastSeenIndexCid(communityID)
}
````

## Step 5: Update Community Description Structure (if needed)

Looking at the protobuf structure, you might want to add an `archive_indexcid_clock` field similar to `archive_magnetlink_clock`. Let me search for that: 

Searched text for `archive_magnetlink_clock`, 1 result

You might want to add a similar field to the protobuf for consistency:

````proto
// In /home/mc2/code/status-im/status-go/protocol/protobuf/communities.proto
// Add after line 116:
uint64 archive_indexcid_clock = 20; // or the next available number
````

## Step 6: Add Message Handlers (similar to magnetlink)

Looking at the existing pattern in messenger_handler.go, you'll need to add handlers for Index CID messages. Let me check where the magnetlink handler is: 

Searched text for `COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK` (`**/protocol/messenger_handler.go`), no results

Let me search for the magnetlink message handling: 

Searched text for `CommunityMessageArchiveMagnetlink`, 4 results

Perfect! Now I can see the complete pattern. Here's what you need to do:

## Step 7: Create Index CID Protobuf Message

Add to communities.proto:

````proto
// Add after CommunityMessageArchiveMagnetlink message
message CommunityMessageArchiveIndexCid {
  uint64 clock = 1;
  string cid = 2;
}
````

## Step 8: Add Index CID Message Type

Add to application_metadata_message.proto:

````proto
// Add after COMMUNITY_MESSAGE_ARCHIVE_MAGNETLINK = 43;
COMMUNITY_MESSAGE_ARCHIVE_INDEX_CID = 76; // or next available number
````

## Step 9: Add Index CID Message Handler

Add to messenger_handler.go (similar to the magnetlink handler):

````go
func (m *Messenger) HandleCommunityMessageArchiveIndexCid(state *ReceivedMessageState, message *protobuf.CommunityMessageArchiveIndexCid, statusMessage *messagingtypes.Message) error {
	logger := m.logger.Named("HandleCommunityMessageArchiveIndexCid")
	
	haveArchiveInfo, err := m.communitiesManager.HasCommunityArchiveInfo(statusMessage.CommunityID)
	if err != nil {
		logger.Debug("failed to check if we have community archive info", zap.Error(err))
		return err
	}

	if !haveArchiveInfo {
		logger.Debug("ignoring index cid message for community with no archive info", zap.String("communityID", types.EncodeHex(statusMessage.CommunityID)))
		return nil
	}

	currentIndexCidClock, err := m.communitiesManager.GetIndexCidMessageClock(statusMessage.CommunityID)
	if err != nil {
		logger.Debug("failed to get index cid message clock", zap.Error(err))
		return err
	}

	if currentIndexCidClock >= message.Clock {
		// ignore older index cid messages
		return nil
	}

	id := statusMessage.CommunityID
	clock := message.Clock
	err = m.communitiesManager.UpdateIndexCidMessageClock(id, clock)
	if err != nil {
		logger.Debug("failed to update index cid message clock", zap.Error(err))
		return err
	}

	if len(message.Cid) > 0 {
		err = m.communitiesManager.UpdateLastSeenIndexCid(id, message.Cid)
		if err != nil {
			logger.Debug("failed to update last seen index cid", zap.Error(err))
			return err
		}
	}

	return nil
}
````

## Step 10: Update `dispatchIndexCidMessage` Method

Update the method in messenger_communities.go to use the correct message type:

````go
func (m *Messenger) dispatchIndexCidMessage(communityID string) error {
	community, err := m.communitiesManager.GetByIDString(communityID)
	if err != nil {
		return err
	}

	indexCid, err := m.archiveManager.GetHistoryArchiveIndexCid(community.ID())
	if err != nil {
		return err
	}

	indexCidMessage := &protobuf.CommunityMessageArchiveIndexCid{
		Clock: m.getTimesource().GetCurrentTime(),
		Cid:   indexCid,
	}

	encodedMessage, err := proto.Marshal(indexCidMessage)
	if err != nil {
		return err
	}

	chatID := community.MagnetlinkMessageChannelID()
	rawMessage := messagingtypes.RawMessage{
		LocalChatID:          chatID,
		Sender:               community.PrivateKey(),
		Payload:              encodedMessage,
		MessageType:          protobuf.ApplicationMetadataMessage_COMMUNITY_MESSAGE_ARCHIVE_INDEX_CID,
		SkipGroupMessageWrap: true,
		PubsubTopic:          community.PubsubTopic(),
		Priority:             &messagingtypes.LowPriority,
	}

	_, err = m.messaging.SendPublic(context.Background(), chatID, rawMessage)
	if err != nil {
		return err
	}

	err = m.communitiesManager.UpdateCommunityDescriptionIndexCidMessageClock(community.ID(), indexCidMessage.Clock)
	if err != nil {
		return err
	}
	return m.communitiesManager.UpdateIndexCidMessageClock(community.ID(), indexCidMessage.Clock)
}
````

## Summary

Here are all the files you need to modify:

1. **Migration**: Create `1757511668_add_index_cid_columns_to_communities_archive_info.up.sql`
2. **Persistence**: Update `SaveCommunityArchiveInfo` method (already done the getters/setters)
3. **Manager**: Add the 4 new methods for Index CID operations
4. **Protobuf**: Add `CommunityMessageArchiveIndexCid` message and `COMMUNITY_MESSAGE_ARCHIVE_INDEX_CID` enum
5. **Handler**: Add `HandleCommunityMessageArchiveIndexCid` method
6. **Dispatch**: Update `dispatchIndexCidMessage` to use correct message type

The pattern is exactly the same as the magnetlink implementation, just with "IndexCid" instead of "Magnetlink". This approach ensures consistency with the existing codebase and makes it easy to maintain.

Would you like me to help you with any specific part of this implementation?