Function: stakeForAccount(address _fundingAccount, address _account, address _depositToken, uint256 _amount)

Allows staking of tokens on behalf of another account.

Inputs

• _fundingAccount

  • Control: Fully controlled by the caller (handler).

  • Constraints: None.

  • Impact: The account that will be used to fund the staking.

• _account

  • Control: Fully controlled by the caller (handler).

  • Constraints: None.

  • Impact: The account that will be staked for.

• _depositToken

  • Control: Controlled by the caller (handler).

  • Constraints: Checked that the token is whitelisted (isDepositToken).

  • Impact: The token to be staked.

• _amount

  • Control: Controlled by the caller (handler).

  • Constraints: Checked that the amount is greater than zero. Also, in the safeTransferFrom call, it is checked that the _fundingAccount (in this case, msg.sender) has enough balance.

  • Impact: The amount of tokens to be staked.

Branches and code coverage (including function calls)

Intended branches

• Assumes no malicious intent on behalf of the handler.

  Test coverage

• Checks that the token is whitelisted (isDepositToken).

  Test coverage

• Checks that the amount is greater than zero.

  Test coverage

• Checks that the _fundingAccount has enough balance (safeTransferFrom).

  Test coverage

• Updates the rewards for the _account.

  Test coverage

• Updates the stakedAmounts for the _account.

  Test coverage

• Updates the depositBalances for the _account.

  Test coverage

• Updates the totalDepositSupply for the _depositToken.

  Test coverage

• Mints the _amount of tokens to the _account.

  Test coverage

Negative behavior

• Should not be callable by anyone other than a handler.

  Negative test

• Should not be callable if isPrivateStakingMode is true.

  Negative test