Support storage mode for code generator (#251)

* Implement storage mode in code generator.

* Fix indexer template for eth_call.

* Add support for both eth_call and storage modes.

* Add eventsInRange, events file gen and default entites gen.

* Use static property to column maps in database.

* Process events query.

* Avoid adding duplicate events in indexer.

* Fix generated watcher query with bigint arguments.

Co-authored-by: nabarun <[email protected]>
Co-authored-by: prathamesh <[email protected]>

packages/codegen/README.md

@@ -13,27 +13,34 @@
 * Run the following command to generate a watcher from a contract file:
 
   ```bash
-  yarn codegen --input-file <input-file-path> --contract-name <contract-name> --output-folder [output-folder] --mode [eth_call | storage] --flatten [true | false]
+  yarn codegen --input-file <input-file-path> --contract-name <contract-name> --output-folder [output-folder] --mode [eth_call | storage | all] --flatten [true | false]
   ```
 
     * `input-file`(alias: `i`): Input contract file path or an URL (required).
     * `contract-name`(alias: `c`): Main contract name (required).
     * `output-folder`(alias: `o`): Output folder path. (logs output using `stdout` if not provided).
-    * `mode`(alias: `m`): Code generation mode (default: `storage`).
+    * `mode`(alias: `m`): Code generation mode (default: `all`).
     * `flatten`(alias: `f`): Flatten the input contract file (default: `true`).
 
   **Note**: When passed an *URL* as `input-file`, it is assumed that it points to an already flattened contract file.
 
   Examples:
-
+
+  Generate code in both eth_call and storage mode.
   ```bash
-  yarn codegen --input-file ./test/examples/contracts/ERC20.sol --contract-name ERC20 --output-folder ../my-erc20-watcher --mode eth_call
+  yarn codegen --input-file ./test/examples/contracts/ERC20.sol --contract-name ERC20 --output-folder ../my-erc20-watcher --mode all
   ```
 
+  Generate code in eth_call mode using a contract provided by URL.
   ```bash
   yarn codegen --input-file https://git.io/Jupci --contract-name ERC721 --output-folder ../my-erc721-watcher --mode eth_call
   ```
 
+  Generate code in storage mode.
+  ```bash
+  yarn codegen --input-file ./test/examples/contracts/ERC721.sol --contract-name ERC721 --output-folder ../my-erc721-watcher --mode storage
+  ```
+
 ## Demo
 
 * Install required packages:
@@ -43,15 +50,15 @@
   ```
 
 * Generate a watcher from a contract file:
-  
+
   ```bash
   yarn codegen --input-file ../../node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol --contract-name ERC20 --output-folder ../demo-erc20-watcher --mode eth_call
   ```
 
   This will create a folder called `demo-erc20-watcher` containing the generated code at the specified path. Follow the steps in `demo-erc20-watcher/README.md` to setup and run the generated watcher.
 
 * Generate a watcher from a flattened contract file from an URL:
-  
+
   ```bash
   yarn codegen --input-file https://git.io/Jupci --contract-name ERC721 --output-folder ../demo-erc721-watcher --mode eth_call
   ```
@@ -65,4 +72,4 @@
 
 ## Known Issues
 
-* Currently, `node-fetch v2.6.2` is being used to fetch from URLs as `v3.0.0` is an [ESM-only module](https://www.npmjs.com/package/node-fetch#loading-and-configuring-the-module) and `ts-node` transpiles to import  it using `require`. 
+* Currently, `node-fetch v2.6.2` is being used to fetch from URLs as `v3.0.0` is an [ESM-only module](https://www.npmjs.com/package/node-fetch#loading-and-configuring-the-module) and `ts-node` transpiles to import  it using `require`.

packages/codegen/src/database.ts

@@ -11,7 +11,6 @@ import _ from 'lodash';
 
 import { getTsForSol } from './utils/type-mappings';
 import { Param } from './utils/types';
-import { capitalizeHelper } from './utils/handlebar-helpers';
 
 const TEMPLATE_FILE = './templates/database-template.handlebars';
 
@@ -22,8 +21,6 @@ export class Database {
   constructor () {
     this._queries = [];
     this._templateString = fs.readFileSync(path.resolve(__dirname, TEMPLATE_FILE)).toString();
-
-    Handlebars.registerHelper('capitalize', capitalizeHelper);
   }
 
   /**