Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a670b6e5b5e65f77dbcfc7448fddc1e1de77712cf4b9f6561fecf494c2ca54f5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^