Vivox allows for users to access the history of a channel's text activity using

VivoxService.Instance.GetChannelTextMessageHistoryAsync(string channelName, int requestSize = 10, ChatHistoryQueryOptions chatHistoryQueryOptions = null)

, with being the name of the channel to request the history of, being the number of messages to return at a maximum (10 is the default), and being an optional parameter which can do things like specifying a word or phrase contained in the messages, a specific PlayerId sender of the messages, or times to query before or after. More specific information on s can be found in Chat history query options.

The messages returned in are listed in order from newest message to oldest message.

The following code snippet is an example of pulling at most recent 25 messages from a set LobbyChannelName, then logging the sender's display name and the message in order from oldest to newest, without using the optional ChatHistoryQueryOptions.

public async void FetchHistoryAsync(){    var historyMessages = await VivoxService.Instance.GetChannelTextMessageHistoryAsync(LobbyChannelName, 10);    //Reversing the messages so they display from oldest to newest    var reversedMessages = historyMessages.Reverse();    foreach(VivoxMessage message in reversedMessages)    {        Debug.Log($"{message.SenderDisplayName}: {message.MessageText}");    }}