Function: stake(address _user, uint256 _amount)

This is the same as stake(uint256 _amount), but it stakes msg.sender want token on behalf of _user.

Inputs

• _user

  • Control: Fully controlled by the caller.

  • Constraints: None. Can even stake on behalf of address(0).

  • Impact: The address that is credited with the balance for the staking.

• _amount

  • Control: Fully controlled by the caller.

  • Constraints: Has to be more than or equal to the amount sent in the transaction.

  • Impact: The amount to stake, which is added to the current balance of _user.

Branches and code coverage

Intended branches

• Stake an amount equal to the funds sent.

  Test coverage

Negative behavior

• Stake more than what is being sent.

  Negative test