Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 16d0b58d748468b285b3eed3c4a955a09d395b1a8fa5098e538b4bc2ee1779e7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^