Function: emergencyWithdraw()

This function allows users to withdraw their entire staked amount in an emergency, regardless of any pending rewards.

Branches and code coverage

Intended branches

• Get the total amount of the user's current stake, user.amount, and sets the user's stake to zero.

  Test coverage

• Iterate through all rewardPools and reset the user's rewardDebt in each pool to zero. This means that the user will no longer have any pending rewards after an emergency withdrawal.

  Test coverage

• Transfer the entire amount of the user's stake from the contract back to the user.

  Test coverage

Negative behavior

• Revert if the current time (block.timestamp) is less than the user's lastStakeTime + unstakingFrozenTime.

  Negative test