Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 16448841aa1b1b9301fcc9c6467182abc4dfd3ecdeb4a1856a4226eeec325c12:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^