Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ca0f3f06421ceb3d6fd30f67b25904bededf32033b0bb17cf058cc4904af3219:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^