Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 49074a66932da109b498bfb7008dad0a7a07a0b91ddcbf52ab69ec671cbf2713:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^