updated the readme

README.md

@@ -2,7 +2,7 @@
 
 The `tx_simulation` tool facilitates transaction simulation using `aiken tx simulate` in conjunction with Koios. 
 
-The simulation script assumes the contracts are implemented using PlutusV2, relies on reference script UTxOs, and operates under the assumption that within a transaction, only the scripts themselves contain datums. It's important to note that specific edge cases may need to be considered when transitioning to a production environment. Additionally, the simulation script currently supports both the mainnet and pre-production environments but does not provide support for preview environments at this time.
+The simulation script assumes the contracts are implemented using PlutusV2, relies on reference script UTxOs, and operates under the assumption that within a transaction, only the script UTxOs have datums. `tx_simulation` currently supports the mainnet and pre-production environments. Support for the preview environment  is not implemented at this time.
 
 The tx simulation script was tested with `Python 3.10.12`, `Aiken v1.0.21`, and `Ubuntu 22.04.2 LTS`.
 
@@ -12,6 +12,12 @@ It is highly suggested that Aiken is installed and on path.
 
 [Install Aiken](https://aiken-lang.org/installation-instructions)
 
+If Aiken is already installed then upgrade to the newest version with `aikup`.
+
+```bash
+aikup
+```
+
 A precompile version of Aiken may be used with the `from_file` or `from_cbor` functions. 
 
 ## Development
@@ -34,41 +40,39 @@ pip install -r requirements.txt
 
 ## Use
 
-The `tx_simulation` script can simulate a transaction from a draft file or from pure cbor.
+The `tx_simulation` script can simulate a transaction from a transaction file or from pure cbor.
 
 ```bash
 import tx_simulation
 
 # can be used on a tx.draft file
-required_units = tx_simulation.from_file('tx.draft')
+execution_units = tx_simulation.from_file('path/to/tx.draft')
 
 # can be used directory on the tx cbor
-required_units = tx_simulation.from_cbor(tx_cbor)
+execution_units = tx_simulation.from_cbor(tx_cbor)
 ```
 
-It will either return a list of dictionaries of the units or a list with an empty dict if it fails. An output example is shown below.
+It will either return a list of dictionaries of the execution units or a list with an empty dict if it fails. An output example is shown below.
+
+Success example:
 
-Success example
 ```json
 [{
     "mem": 443656, 
     "cpu": 171399581
 }]
 ```
 
-Failure example
+Failure example:
+
 ```json
 [{}]
 ```
 
 ## Testing
 
-Inside the `tests` folder are pytest tests for `tx_simulation.py`. The tests can be ran with the command below.
+Inside the `tests` folder are pytest tests for `tx_simulation`. The tests can be ran with the command below.
 
 ```bash
 pytest
 ```
-
-## Known Issues
-
-Any scripts involving fee logic always error resulting in an empty dictionary being returned.