Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> de99d2d1be45a18e5c47e4b3b0816ae52a3c12730a8743fa6c4814702c373b4f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^