Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 973ddf840a467a284a1c1fb31b7e71216a33acb2c6267153e1d4a94518ea54aa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^