Simplify the Example Code

simplify the example code

Author: slendermaan

not-so-smart-contracts/cosmos/missing_error_handler/README.md

@@ -4,36 +4,13 @@ The idiomatic way of handling errors in `Go` is to compare the returned error to
 
 
 ## Example 
-In the following code, `k.bankKeeper.SendCoins(ctx, lender, borrower, amount)` does not have any return values being used, including `err`. This results in `SendCoin` not being able to prevent the transaction from executing even if there is an `error` due to insufficient balance in `SendCoin`.
+In the following code, `k.bankKeeper.SendCoins(ctx, sender, receiver, amount)` does not have any return values being used, including `err`. This results in `SendCoin` not being able to prevent the transaction from executing even if there is an `error` due to insufficient balance in `SendCoin`.
 ```golang
-func (k msgServer) ApproveLoan(goCtx context.Context, msg *types.MsgApproveLoan) (*types.MsgApproveLoanResponse, error) {
-	ctx := sdk.UnwrapSDKContext(goCtx)
-
-	loan, found := k.GetLoans(ctx, msg.Id)
-	if !found {
-		return nil, sdkerrors.Wrapf(sdkerrors.ErrKeyNotFound, "key %d doesn't exist", msg.Id)
-	}
-
-	// TODO: for some reason the error doesn't get printed to the terminal
-	if loan.State != "requested" {
-		return nil, sdkerrors.Wrapf(types.ErrWrongLoanState, "%v", loan.State)
-	}
-
-	lender, _ := sdk.AccAddressFromBech32(msg.Creator)
-	borrower, _ := sdk.AccAddressFromBech32(loan.Borrower)
-	amount, err := sdk.ParseCoinsNormalized(loan.Amount)
-	if err != nil {
-		return nil, sdkerrors.Wrap(types.ErrWrongLoanState, "Cannot parse coins in loan amount")
-	}
-
-	k.bankKeeper.SendCoins(ctx, lender, borrower, amount)
-
-	loan.Lender = msg.Creator
-	loan.State = "approved"
-
-	k.SetLoans(ctx, loan)
-
-	return &types.MsgApproveLoanResponse{}, nil
+func (k msgServer) Transfer(goCtx context.Context, msg *types.MsgTransfer) (*types.MsgTransferResponse, error) {
+	...
+	k.bankKeeper.SendCoins(ctx, sender, receiver, amount)
+	...
+	return &types.MsgTransferResponse{}, nil
 }
 ```
 ## Mitigations