Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cd5e182cf72718e7e4dfc68eef7e9dc793bf3345c3b604a33baa3af002c3e2e5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^