Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5f37294bbcbaae4a66e18ebf86b63808211d7c788e4c8283d112aa78872c107f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^