Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1b27a5d62d40765e349fccee10a73c43f7e207659498da064618efe5b49774c0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^