Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6734cbbdd8f3763d6c9e25aab53baa8ab4c682b267cac76fc78b54a8017ba087:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^