Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4b5604c4a5e9b159e06b44bdb1ba8a88c7a5813b2793314d3986ed8427c698fa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^