Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4382bfc51b2dd6ca859184c70e9bf236eb5433712a053988f3885071b4fe8354:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^