Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 540a1cbca2c65b4d79adbabc9fe751dded530358b13e069c83b8c3a9bb16bc7a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^