Create a math function and implement it in Solidity [Paid Bounty]

[OpenOrg-gg]

For this bounty you'll design a math function and implement it in Solidity.

In this scenario, users receive a set amount of tokens as a reward each cycle, and have to maintain a safety margin that is expressed as a percent.

Right now, the safety margin does not impact the users rewards. 1e18 tokens earned = 1 e18 tokens paid out.

You should design a math function that will act as a multiplier for this reward.

The function should:

• Reward at a rate of 1x when a users safety margin is 400%.
• Reward at a rate of 1.10x when a users safety margin is 500%.
• Reward at a rate of 0x if a users safety margin is 250% or lower.
• The reward rate should be skewed in favor of higher numbers. It should not be linear.

Your final work should include both:

• A math equation.
• The equation implemented as a function in Solidity.
• Unit tests showing the function works correctly, can be used with safe math, and properly handles any rounding or truncating.

The payout for this bounty is $250.

[gitcoinbot]

Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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Work has been started.

These users each claimed they can complete the work by 4 days, 22 hours from now. Please review their action plans below:

1) bshevchenko has been approved to start work.

Ready to start with this one ;) 2) shubhamss105 has applied to start work _(Funders only: approve worker | reject worker)_.

I would like to contribute and implement the math function using solidity. 3) iotaaxel has applied to start work _(Funders only: approve worker | reject worker)_.

I am interested and plan to do detailed unit tests for the math function.

Learn more on the Gitcoin Issue Details page.

[bshevchenko]

Thank you for approval! Work in progress