Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a1f4bde57d591afc52d977687ebbdc5146c2227192f708bcc07d731e064f3458:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^