Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0e6ae317b3fd4b6a254a13fa2fea7066820f70d4f250f20e9b2322431a4f25e4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^