Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 62fa741b95fcbaa55848a212053813781ac5dbb77f3a7177a2545bccfb8c5d07:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^