Function: _stakeFor(address _account, uint256 _amount)

This function will be called by the stake function, used for users to stake stakeToken and record the relevant information of this transaction.

Inputs

• _account

  • Control: Arbitrary.

  • Constraints: None.

  • Impact: The address of the user performing the staking.

• _amount

  • Control: Arbitrary.

  • Constraints: Greater than zero.

  • Impact: The amount of stakeToken the user wants to stake.

Branches and code coverage

Intended branches

• Transfer stakeToken to the current contract.

  Test coverage

• Get the UserInfo structure of _account to update the user's staking information.

  Test coverage

• Calculate, by iterating over rewardPoolInfo, the rewardDebt for each reward pool and update the user's rewardDebt with the new amount.

  Test coverage

• Update user.lastStakeTime to the current block.timestamp to record the time when the staking occurs.

  Test coverage

Negative behavior

• Revert if _amount is zero.

  Negative test