Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d51a8ac69edeba4866c0870d023f4db9267a7797321fb5eebab45befe4667766:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^