Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 73c9096a4b9bc72182ea2265d8a56c2dc820bcc89789d8d789f478cacf63857c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^