function getLockedAmount(
    LockedInfo[] memory array,
    address account,
    uint256 amount,
    bool isIncrease
) public pure override returns (uint256) {
    if (array.length == 0) return 0;

    uint256 newLockedAmount;
    if (isIncrease) {
        for (uint256 i = 0; i < array.length; i++) {
            uint256 remainingVouchingAmount;
            if (array[i].vouchingAmount > array[i].lockedAmount) {
                remainingVouchingAmount = array[i].vouchingAmount - array[i].lockedAmount;
            } else {
                remainingVouchingAmount = 0;
            }

            if (remainingVouchingAmount > array[i].availableStakingAmount) {
                if (array[i].availableStakingAmount > amount) {
                    newLockedAmount = array[i].lockedAmount + amount;
                } else {
                    newLockedAmount = array[i].lockedAmount + array[i].availableStakingAmount;
                }
            } else {
                if (remainingVouchingAmount > amount) {
                    newLockedAmount = array[i].lockedAmount + amount;
                } else {
                    newLockedAmount = array[i].lockedAmount + remainingVouchingAmount;
                }
            }

            if (account == array[i].staker) {
                return newLockedAmount;
            }
        }
    } else {
    ...
