Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 77c6bd829af5c5322dae2e996e222a3a42b41e4167f5baa00b19728e97714176:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^