Function: setRateParams(uint80 _baseInterestRate, uint80 _maxInterestRate, uint256 _kinkUtilizationRatio, uint80 _kinkInterestRate)

This function allows the caller with access to update the rate parameters.

Inputs

• _baseInterestRate

  • Constraints: _baseInterestRate should be less than _kinkInterestRate.

  • Impact: Base interest rate, which is used for calculating the current interest rate in case utilizationRatio is less than or equal to the kinkUtilizationRatio.

• _maxInterestRate

  • Constraints: It should neither be more than _kinkInterestRate or _baseInterestRate.

  • Impact: This rate represents the interest rate applied when the utilization reaches 100%.

• _kinkUtilizationRatio

  • Constraints: It should neither be equal to zero nor less than PRECISION.

  • Impact: The utilization level at which the slope of the curve shifts. The current interest rate will be calculated using _kinkInterestRate when utilizationRatio is more than _kinkUtilizationRatio.

• _kinkInterestRate

  • Constraints: _kinkInterestRate should be less than _maxInterestRate and more than _baseInterestRate.

  • Impact: Interest rate at the kinkUtilization.

Branches and code coverage

Intended branches

• The new parameters have been set successfully

  Test coverage

Negative behavior

• Non-whitelisted caller

  Negative test

• Set invalid rate params

  Negative test