Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 72e3d73a4a1e3c37ddf695138aec06535e248573cecc8ab43f4aebc632b42166:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^