Optimize watcher

[Wukong247]

Slice of ife changes to optimize watcher

[codecov]

Codecov Report

❌ Patch coverage is 75.84270% with 215 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.49%. Comparing base (776b75d) to head (37d55df).
⚠️ Report is 66 commits behind head on master.

Files with missing lines	Patch %	Lines
src/taker/offers.rs	81.10%	72 Missing ⚠️
src/taker/api.rs	23.68%	58 Missing ⚠️
src/bin/taker.rs	4.00%	24 Missing ⚠️
src/maker/server2.rs	65.51%	20 Missing ⚠️
src/maker/server.rs	81.03%	11 Missing ⚠️
src/watch_tower/rpc_backend.rs	90.98%	11 Missing ⚠️
src/taker/api2.rs	72.22%	10 Missing ⚠️
src/watch_tower/utils.rs	91.66%	5 Missing ⚠️
src/wallet/fidelity.rs	81.25%	3 Missing ⚠️
src/watch_tower/watcher.rs	94.73%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #666      +/-   ##
==========================================
+ Coverage   68.87%   77.49%   +8.62%     
==========================================
  Files          35       49      +14     
  Lines        4932    14835    +9903     
==========================================
+ Hits         3397    11497    +8100     
- Misses       1535     3338    +1803     

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[mojoX911]

Insane lift @Wukong247 . Made a basic pass. This is the most awesome market logic we have till date. Great work. Will do a thorough review and testing soon.

It would be good if you could mark all the possible TODOs and Improvements in the code site. I am sure there's a lot. Maybe some more crazy optimization ideas that we can add later. We will later turn them into issues. It would be very helpful if they were marked at the code site itself for now.

[mojoX911]

Ack.