Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 015cae0e9e313806f5e08777c644168be46ee7995d130a044bb580741a2e1abe:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^