mirror of
https://github.com/cerc-io/watcher-ts
synced 2024-11-20 04:46:20 +00:00
121 lines
3.4 KiB
Markdown
121 lines
3.4 KiB
Markdown
# Code Generator
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## Setup
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* In root of the repository:
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* Install required packages:
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```bash
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yarn
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```
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* Build files:
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```bash
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yarn build
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```
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## Run
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* Run the following command to generate a watcher from a contract file:
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```bash
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yarn codegen --input-file <input-file-path> --contract-name <contract-name> --output-folder [output-folder] --mode [eth_call | storage | all] --flatten [true | false] --kind [lazy | active]
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```
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* `input-file`(alias: `i`): Input contract file path or an URL (required).
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* `contract-name`(alias: `c`): Main contract name (required).
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* `output-folder`(alias: `o`): Output folder path. (logs output using `stdout` if not provided).
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* `mode`(alias: `m`): Code generation mode (default: `all`).
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* `flatten`(alias: `f`): Flatten the input contract file (default: `true`).
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* `kind` (alias: `k`): Kind of watcher (default; `active`).
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**Note**: When passed an *URL* as `input-file`, it is assumed that it points to an already flattened contract file.
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Examples:
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Generate code in both `eth_call` and `storage` mode, `active` kind.
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```bash
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yarn codegen --input-file ./test/examples/contracts/ERC20.sol --contract-name ERC20 --output-folder ../my-erc20-watcher --mode all --kind active
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```
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Generate code in `eth_call` mode using a contract provided by an URL.
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```bash
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yarn codegen --input-file https://git.io/Jupci --contract-name ERC721 --output-folder ../my-erc721-watcher --mode eth_call
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```
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Generate code in `storage` mode, `lazy` kind.
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```bash
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yarn codegen --input-file ./test/examples/contracts/ERC721.sol --contract-name ERC721 --output-folder ../my-erc721-watcher --mode storage --kind lazy
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```
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Generate code for `ERC721` contract in both `eth_call` and `storage` mode, `active` kind:
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```bash
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yarn codegen --input-file ../../node_modules/@openzeppelin/contracts/token/ERC721/ERC721.sol --contract-name ERC721 --output-folder ../demo-erc721-watcher --mode all --kind active
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```
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This will create a folder called `demo-erc721-watcher` containing the generated code at the specified path. Follow the steps in [Run Generated Watcher](#run-generated-watcher) to setup and run the generated watcher.
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## Run Generated Watcher
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### Setup
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* Run the following command to install required packages:
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```bash
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yarn
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```
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* Create the databases configured in `environments/local.toml`.
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### Customize
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* Indexing on an event:
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* Edit the custom hook function `handleEvent` (triggered on an event) in `src/hooks.ts` to perform corresponding indexing using the `Indexer` object.
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* Refer to `src/hooks.example.ts` for an example hook function for events in an ERC20 contract.
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### Run
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* Run lint:
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```bash
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yarn lint
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```
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* Run the watcher:
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```bash
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yarn server
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```
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* If the watcher is an `active` watcher:
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* Run the job-runner:
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```bash
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yarn job-runner
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```
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* To watch a contract:
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```bash
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yarn watch:contract --address <contract-address> --kind ERC721 --starting-block [block-number]
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```
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* To fill a block range:
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```bash
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yarn fill --startBlock <from-block> --endBlock <to-block>
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```
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## Known Issues
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* 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`.
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