Custom, user defined payouts

[keegreil]

Work In Progress PR to get an initial "vector check":

This PR aims to make two things possible:

Override the PPLNS defined coinbase payouts with a user defined payout list provided from a local file. If no local filename is given in the config file, then p2poolv2 behavior reverts to default PPLNS.

Get share information from p2poolv2, so that shares meeting a difficulty threshold can be forwarded to an external pool.

This PR is being submitted in conjunction with a PR to p2poolv2.
Every effort was made to minimize changes to the p2poolv2 repository, and to house most of the logic and modifications in Hydrapool.

Remaining tasks:
More thorough debugging and edge case testing
Documentation.

[pool2win]

Hey @keegreil, this looks really nice.

My concern is to merge changes into main.rs. Here is my thinking, let me take your lead and finally build a plugin system for hydrapool payout/accounting mechanisms. I wrote up an issue describing what we want this plugin system to do. I will then take your mechanism and convert it into a plugin and you can then own it from there. How does it sound like a plan..

The issue is here: #43

[keegreil]

Hey @keegreil, this looks really nice.

My concern is to merge changes into main.rs. Here is my thinking, let me take your lead and finally build a plugin system for hydrapool payout/accounting mechanisms. I wrote up an issue describing what we want this plugin system to do. I will then take your mechanism and convert it into a plugin and you can then own it from there. How does it sound like a plan..

The issue is here: #43

That sounds good to me!

Only reason I selected merge to "main" is I couldn't figure out how to make the PR merge to a tag and I got tired of messing with it. My code was based off the latest tags on both repos, so automerge would work.

I think the plugin system sounds great, much cleaner and more flexible than my hacked together method.

Happy to do whatever work I need after the fact to get my stuff working.

Thanks!