Feature / Campaign custom withdraw amount

[scorpioborn]

Description

Add authorization withdrawal limit to the campaign withdrawal transaction.

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Type of change

Please check the options that are relevant. This PR introduces

• Patch: Bug fix (non-breaking change which fixes an existing issue)
• Minor: New feature (non-breaking change which adds new functionality)
• Major: Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Features Description

• Added amount to withdrawal
• Implement Authorization with withdrawal limit
• Track the withdrawn amount instead of making the total amount zero
• Multiple withdrawal is possible

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Test Cases

• NA

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Documentation

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Checklist:

• I have added change type (major|minor|patch) in the PR
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 5.03597% with 132 lines in your changes are missing coverage. Please review.

Project coverage is 11.58%. Comparing base (977c6da) to head (6be1551).

Files	Patch %	Lines
x/reward/types/authz.pb.go	0.00%	33 Missing ⚠️
x/reward/types/campaign.pb.go	0.00%	33 Missing ⚠️
x/reward/types/tx.pb.go	0.00%	33 Missing ⚠️
x/reward/types/campaign_authorizaton.go	0.00%	23 Missing ⚠️
x/reward/keeper/msg_server_campaign.go	14.28%	6 Missing ⚠️
x/reward/types/pool.go	62.50%	3 Missing ⚠️
x/reward/types/messages_campaign.go	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #378      +/-   ##
==========================================
- Coverage   11.60%   11.58%   -0.03%     
==========================================
  Files         351      351              
  Lines       45689    45815     +126     
==========================================
+ Hits         5304     5306       +2     
- Misses      39905    40029     +124     
  Partials      480      480              

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