Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 054bdba66aa96ff9db7e726eb2f9553016d72c2ecdb45929da9794c8191a1330:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^