Create a new device data ticker, which batches calls to Remember and invokes a callback every d duration.

NewPollerMap makes a new PollerMap.

NewTokensTable creates the syncv3_sync2_tokens table if it does not already exist.

This struct remembers user+device IDs to notify for then periodically emits them all to the caller.

DevicesTable remembers syncv2 since positions per-device.

HTTPClient represents a Sync v2 Client.

PendingTransactionIDs is (conceptually) a map from event IDs to a list of device IDs.

PollerMap is a map of device ID to Poller.

InviteResponse represents a /sync response for a room which is under the 'invite' key.

JoinResponse represents a /sync response for a room which is under the 'join' or 'peek' key.

LeaveResponse represents a /sync response for a room which is under the 'leave' key.

TokenForPoller represents a row of the tokens table, together with any data maintained by pollers for that token's device.

TokensTable remembers sync v2 tokens.

V2DataReceiver is the receiver for all the v2 sync data the poller gets.