Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6fb788e9b0b80c694d6b5ec421ab09c260e622e71165e704cece50f242faaa9f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^