Copy
210/// @notice Increases the amount of an account in the `_heap`.
211/// @dev Only call this function when `_id` is in the `_heap` with a smaller value than `_newValue`.
212/// @param _heap The heap to modify.
213/// @param _id The address of the account to increase the amount.
214/// @param _newValue The new value of the account.
215/// @param _maxSortedUsers The maximum size of the heap.
216function increase(
217    HeapArray storage _heap,
218    address _id,
219    uint256 _newValue,
220    uint256 _maxSortedUsers
221) private {
222    uint256 rank = _heap.ranks[_id];
223    Account memory account = getAccount(_heap, rank);
224    account.value = _newValue;
225    setAccountValue(_heap, rank, _newValue);
226    uint256 nextSize = _heap.size + 1;
227
228    if (rank < nextSize) shiftUp(_heap, rank);
229    else {
230        swap(_heap, nextSize, rank);
231        shiftUp(_heap, nextSize);
232        _heap.size = computeSize(nextSize, _maxSortedUsers);
233    }
234}

Copy
297/// @notice Returns the address coming before `_id` in accounts.
298/// @dev The account associated to the returned address does not necessarily have a lower value than the one of the account associated to `_id`.
299/// @param _heap The heap to search in.
300/// @param _id The address of the account.
301/// @return The address of the previous account.
302function getPrev(HeapArray storage _heap, address _id) internal view returns (address) {
303    uint256 rank = _heap.ranks[_id];
304    if (rank > 1) return getAccount(_heap, rank - 1).id;
305    else return address(0);
306}