SwapBackResult (uint256 amountIn, uint256 amountOut)
[topic 0]:0x877973055cc76aebb6c1702046758fb56e804bca4a8bf998824b99ed02bbbafd
0x00000000000000000000000000000000000000000000028d1f08047828be52ee00000000000000000000000000000000000000000000000004aa78c5994e36ac