Function: repayPrincipal(uint256 _principal)

This allows the repayment of the principal amount by custom amount.

Inputs

• _principal

  • Control: Full control by the caller.

  • Constraints: None.

  • Impact: The amount of principal to be repaid by the caller.

Branches and code coverage

Intended branches

• Accrue the interest before repaying.

  Test coverage

• Repay by transferring in the funds from the caller.

  Test coverage

• Update the borrowedInterest and borrowedPrincipal state variables by subtracting the repaid amount.

  Test coverage

Negative behavior

• Should not allow anyone other than the borrower to repay.

  Negative test

• Should not allow paying more than what is borrowed. Ensured through the borrowedPrincipal variable.

  Negative test