Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1419ec0bc580f1a91b9f0a66e1b041d0fed88920483073fac0f6a029b3c16981:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^