Improve information of error codes

docs/error_codes.md

@@ -4,20 +4,20 @@
 - **GS000: Could not finish initialization**
 
 - **GS001: Threshold needs to be defined**   
-Threshold is `equals to zero`, some error could happen during the Safe creation.
+Threshold is `equal to zero`, some error could happen during the Safe setup.
 
 ### General gas/ execution related
 - **GS010: Not enough gas to execute Safe transaction**  
-SafeTxHash is too high or gas limit is too low to execute the transaction, remeber that `3000 gwei` are needed to events.  
-Review this values and increase or reduce it according the current gas price and your requirements.  
+SafeTxHash is too high or gas limit is too low to execute the transaction, keep in mind that `2500 gwei` are needed to events and `500 gwei` to perform code until execution.  
+Review this values and increase the `gasLimit` or reduce the `safeTxHash` according the current gas price and your requirements.  
 
 - **GS011: Could not pay gas costs with ether**   
-The transaction that you are trying to execute cannot be paid with `ether`.   
-Configure the correct token on gasToken parameter.  
+There are not enough funds of `ether` to execute the transaction.   
+Make sure that you have enough funds of `ether` or choose other token with enough funds setting it in `gasToken`.  
 
 - **GS012: Could not pay gas costs with token**  
-The transaction that you are trying to execute cannot be paid with the `token` configured on gasToken.   
-Configure the correct token on gasToken parameter or set it to 0 if you want use `ether`.  
+There are not enough funds of the token choosen on `gasToken` to execute the transaction.      
+Make sure you have enough of the gasToken or set it to `address(0)` if you want use ether.  
 
 - **GS013: Safe transaction failed when gasPrice and safeTxGas were 0**  
 This happen because the safe try to use all provided gas (gasLimit) but was insufficient.   
@@ -70,16 +70,15 @@ The module address provided cannot be `Zero` or `SENTINEL`.
 The module that are trying to add was added before.   
 
 - **GS103: Invalid prevModule, module pair provided**  
-`prevModule` is not linked with `module` in the dynamic list.   
-Review that you are providing the correct values.  
+`prevModule` is not the previous element to `module` in the module list.   
 
 - **GS104: Method can only be called from an enabled module** 
 
 
 ### Owner management related
 - **GS200: Owners have already been setup** 
-`setupOwners` can be called once.  
-If you want to add, swap or remove and owner use the correspond method:  
+`setupOwners` can only be called once.
+If you want to add, swap or remove an owner use the corresponding method:  
     - `adOwnerWithThreshold` 
     - `swapOwner`  
     - `removeOwner`    
@@ -91,15 +90,13 @@ Sender is trying to configure a threshold greater than the total of owners or tr
 Sender is calling `changeThreshold` with 0.   
 
 - **GS203: Invalid owner address provided**  
-The owner address provided cannot be `Zero`, `SENTINEL` or the current `safe` address.  
+The owner address provided cannot be `address(0)`, sentinel address `address(1)` or the current `safe` address.  
 
 - **GS204: Address is already an owner**  
 Sender is trying to add an owner that was added before.   
-Review that are setting the correct owner address.  
 
 - **GS205: Invalid prevOwner, owner pair provided**  
-`prevOwner` is not linked with `owner` in the dynamic list.   
-Review that you are providing the correct values. 
+`prevOwner` is not the previous element to `owner` in the owner list.   
 
 ### Guard management related
 - `GS300`: `Guard does not implement IERC165`