Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 43d51a768e293b67dc1bc8b46d0c2eceaeb5697b59e430aa5b6f0bb1bea25839:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^