Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 70635d15b8eda60133d8a3e831bc49015e02ce9548c4b3e456955cf65ecf2ce9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^