The most obvious way to get the address for a pair is to call getPair on the factory. If the pair exists, this function will return its address, else
The “canonical” way to determine whether or not a pair exists.
Requires an on-chain lookup.
The factory address
token0 must be strictly less than
token1 by sort order.
Can be computed offline.
Requires the ability to perform
address factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;address token0 = 0xCAFE000000000000000000000000000000000000; // change me!address token1 = 0xF00D000000000000000000000000000000000000; // change me!address pair = address(uint(keccak256(abi.encodePacked(hex'ff',factory,keccak256(abi.encodePacked(token0, token1)),hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f'))));