Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 89425119c612500f3d47ca2c47dabdb1d6cc10fc883bbfdb4f2735bc0b82e368:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^