Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d3aeeffaee6b7ee9bda5b1a701339d5e247f35984b48f98a2694b6a52c6a74f1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^