uniswapV2 sync skim
sync() and skim():
When liquidity is added in Uniswap v2 the reserves are updated. However, in a case where tokens are deposited in contract, the balance of the contract would vary from the amount of reserves. The trade performed while balances and reserves are not synced would have incorrect values. The function sync() sets the reserves of the contract according to the balances.
If the user deposits balance in the contract and this balance exceeds uint112. Calling the sync() function is not suitable. Since the _update() function in sync() uses uint112 which will overflow. In such a case the function skim() is to be used. Skim will remove the access balance and resolve the deadlock of clogging the uint112.
Last updated