Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c76fd8f1825c8fa0567d1633fa560f45862cd1b963d5f400f8489b010180ffc1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^