Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 386c877726ee437f2e5bde6649041ad8bf38c3ae17143cabc07d72e83a006d7a:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^