Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d04c5312388b7ba53f6cd0bb5890de0dd37facee57955391e116c181bc95cd44:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^