Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 91578a6cc5d3ea3ed5bf1660ffb647a3c4e511e14868238a428dd35ba3a627d3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^