Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1316b87f14a60931dd77dc245313eaf6e18ff1eca9ecf0f23dc74660bb429a27:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^