Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 28bb233bd194deb6f4323752db93a91f731f06a765550eec417571e4ebd3a830:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^