Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2e0d9e9c367004f723310117d440fa7438ac9c173b6f519293e86f763420735f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^