Function: positionTakeover(Position storage liquidator, Position memory liquidatee, uint256 price, uint256 leverage)

If the liquidator already holds a position in the same direction as the liquidatee position or has no position, the _takeoverOpen function is executed to increase the liquidator position. If the liquidator holds a position in the opposite direction so the current position is partially or fully closed, a new one may be reopened in the new direction using _takeoverClose.

Branches and code coverage

Intended branches

• Liquidator has no position.

  Test coverage

• Liquidator and liquidatee are both long.

  Test coverage

• Liquidator and liquidatee are both short.

  Test coverage

• Liquidator is long and liquidatee is short.

  Test coverage

• Liquidator is short and liquidatee is long.

  Test coverage

• oiDelta.long or oiDelta.short are calculated correctly.

  Test coverage

• Liquidator’s position has correct price, margin, openNotional, and amount.

  Test coverage

• collateralDelta is calculated properly.

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• Leverage is used correctly to determine a new margin.

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• Liquidatee PNL is correct for a long position closed at a lower price.

  Test coverage

• Liquidatee PNL is correct for a short position closed at a higher price.

  Test coverage