Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e2b0014bc24df6fa5f73f9a72a034f0980505b8f96e7733e70595c0fe1609388:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^