Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a5eaf0b85c6cf8b044f395bbb405b5e91345999f3a6ae643a0ca4ecf989b6728:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^