Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e15ab2adfaee2ecbfb9bb997a2eaecd3ae25a152a7a14cfcd3eef11f25a21041:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^