Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 69b9448d12f1db0d0c302dd9a91f01b76e0bea11c1b3471fe29646d98daf70d6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^