Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bc2886f6546a22101dfe31e531a801282c64f1d59ef4a3f0abc3cf22ca6557a4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^