IStrategyexposes a few functions.
addLiquidity. To redeem it calls
removeLiquidity. However, some additional bookkeeping is involved to handle mid-duration deposits and removal of LP tokens.
harvestto occasionally convert earned Sushi into a balance of senior and junior assets to reinvest into LP tokens. Of course, those LP tokens are placed into Masterchef, which earns Sushi, that is again harvested to reinvest into LP tokens. The cycle continues.