Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 86aeacb27bd8fd97b8ae2ecea0a6439351c2f186db93d974298713308b4a1d9e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^