Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6ddfb193035604323b20a14a2a34740cea950191f915e08fb2ff2a88515b5c90:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^