Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8ff70623cfea187b5d71dae680ef984682917092ffb207e95f94b427d24fa09b:16:28
   |
16 |                             let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^