Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fce90c99216e01e96451cee20d12589f9b0a2bb27b1ab05667ae5c6e34b67859:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^