Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
  --> 3f56686ac929ec10fc4e4f1caa63de7120be4b2600c78bfc5597d34c6fcde2f8:19:11
   |
19 |         if tryBI(tokenInVault: flowTokenVault) {
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: underflow
  --> 3f56686ac929ec10fc4e4f1caa63de7120be4b2600c78bfc5597d34c6fcde2f8:35:24
   |
35 |     let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^