Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 038fd0de23952ddf7823e62de76c2f48f1fe506af3a4b28a759912ecbdf95d63:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^