Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> eefecc97ac0f6b90bc07c049f86e9ada7b5cb34d2c80657eb9d01f91d34b6407:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^