Telegram message prefix

[Yorik-Code]

Description

This enhancement adds a prefix to Telegram messages. When running multiple miners using one Telegram chat, it is difficult to discern which miner the message relates to. Much like the console_username parameter, this adds the ability to identify the messages. However, this does not use the username by default (concern about long usernames creating overly verbose messages).

Opt-In by default: Does nothing unless it is specifically configured. If the user configures a text string, it will be pre-pended into message that send to the Telegram chat. If the configuration line is not present, it continues normally.

Works particularly well with a space after the text, so I added this in the comment text in example.py and the readme.md

I have updated what I believe needed to be updated.

Fixes # (discussion) Partly resolves my own discussion - #376

• After thinking more deeply, I realised that putting the full twitch username in the message was not a great idea as it would be overly verbose for a Telegram message. I subsequently thought that having the ability to create a short string the prefix the messages with will help to identify the miner. I personally use the first characters of the miner name.

Type of change

• [X] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• I have tested this locally with multiple miners and it is working successfully. Messages are prefixed.
• I have commented out the message_prefix in run.py configuration - works as normal
• I have deleted the message_prefix configuration line in run.py - works as normal

To test:

1. Use a miner with a configuration with configured Telegram messaging.
2. Change the message_prefix option in the Telegram section of run.py from False to "User "
3. Start miner
4. Check Telegram messages
5. If successful, messages will be prefixed with "User "

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my code
• [x] I have commented on my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation (README.md)
• [X] My changes generate no new warnings
• [x] Any dependent changes have been updated in requirements.txt

Notes

• I didn't think that my few lines of code warranted comments, but I updated the readme.md and example.py to suit with some comments in there.
• Nothing is changed in the requirements I believe as this is a very simple change.
• This is my first Pull Request, hopefully I got it sort of right.
• I don't use other messaging services, but this could work for others as well.

[rdavydov]

There is a better way. And I think it should cover not only Telegram, but also Discord, Matrix and Pushover. Something like the "console_username" way.