Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 00ae43fb5317bc90221d85c87e252be47b0f89f8d885f76f7d30da0097eaf863:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^