Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> da913135340238683a265b6ab4f1eac6b0656dcf77444cf4d358382514c0af32:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^