Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6226a01c070cb19388397e70d8839f58bf6463db822c5d17ece0d643a1b80a21:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^