Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8f036c7cd8b05f41d08bb6e3873f1052de715a9aba38f5019ea3d53f94fc7221:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^