Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b470bf5b7398a26e07e7095e6a86109d8bf3c7029d9e6617027229a15ecb570a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^