Avoid the edge case where block timestamp overflows to 0 (Uniswap#19)

cNoveron · Apr 27, 2020 · 53eed35 · 53eed35
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commit 53eed35
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diff --git a/contracts/ExampleOracleSimple.sol b/contracts/ExampleOracleSimple.sol
@@ -32,7 +32,6 @@ contract ExampleOracleSimple {
         uint112 reserve1;
         (reserve0, reserve1, blockTimestampLast) = _pair.getReserves();
         require(reserve0 != 0 && reserve1 != 0, 'ExampleOracleSimple: NO_RESERVES'); // ensure that there's liquidity in the pair
-        require(blockTimestampLast != 0, 'ExampleOracleSimple: NO_PRICE_HISTORY'); // ensure there's a price history
     }
 
     function update() external {