Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 52b95d6aff746126d7772c36ffc8015cf04638fd3d542b1d4bd3bc831e63898b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^