Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5bd6e2be1ffaa13de568c63838e5b897508fe4b86db0196ef69bb507ca8e45d5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^