Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b667207d2d9f476e275fba25fc0c3ad62aa2f16cbdf248f86caf0e0c47b6ee29:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^