Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1ae04f4ad55f36285713c6730108fca553ba91a1177479c6513966ac46ec955c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^