Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 08ce5cdb75e724947f3dc761cc11cf5c1621a4091ee0f1650c1d1724769356b0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^