Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f23f3467feb2825419a7e7c55b53d0dac3baa8db0ad9e026271f30542a34896a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^