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# Watchers Directory
Here contains all the publicly available watchers for your experimenting purposes. For general information on setting up the stack and the CLI commands used to interact with watchers, see the [docs](/docs) directory.
## Customizing Watchers
* Indexing on an event:
* Edit the custom hook function `handleEvent` (triggered on an event) in [hooks.ts](./src/hooks.ts) to perform corresponding indexing using the `Indexer` object.
* While using the indexer storage methods for indexing, pass `diff` as true if default state is desired to be generated using the state variables being indexed.
* Generating state:
* Edit the custom hook function `createInitialState` (triggered if the watcher passes the start block, checkpoint: `true`) in [hooks.ts](./src/hooks.ts) to save an initial `State` using the `Indexer` object.
* Edit the custom hook function `createStateDiff` (triggered on a block) in [hooks.ts](./src/hooks.ts) to save the state in a `diff` `State` using the `Indexer` object. The default state (if exists) is updated.
* Edit the custom hook function `createStateCheckpoint` (triggered just before default and CLI checkpoint) in [hooks.ts](./src/hooks.ts) to save the state in a `checkpoint` `State` using the `Indexer` object.

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First try the [stack orchestrator](https://github.com/cerc-io/stack-orchestrator) to quickly get started. Advanced users can see [here](/docs/README.md) for instructions on setting up a local environment by hand. First try the [stack orchestrator](https://github.com/cerc-io/stack-orchestrator) to quickly get started. Advanced users can see [here](/docs/README.md) for instructions on setting up a local environment by hand.
## Customize
* Indexing on an event:
* Edit the custom hook function `handleEvent` (triggered on an event) in [hooks.ts](./src/hooks.ts) to perform corresponding indexing using the `Indexer` object.
* While using the indexer storage methods for indexing, pass `diff` as true if default state is desired to be generated using the state variables being indexed.
* Generating state:
* Edit the custom hook function `createInitialState` (triggered if the watcher passes the start block, checkpoint: `true`) in [hooks.ts](./src/hooks.ts) to save an initial `State` using the `Indexer` object.
* Edit the custom hook function `createStateDiff` (triggered on a block) in [hooks.ts](./src/hooks.ts) to save the state in a `diff` `State` using the `Indexer` object. The default state (if exists) is updated.
* Edit the custom hook function `createStateCheckpoint` (triggered just before default and CLI checkpoint) in [hooks.ts](./src/hooks.ts) to save the state in a `checkpoint` `State` using the `Indexer` object.
## Run ## Run
* If the watcher is a `lazy` watcher: Setup with:
* Run the server: ```bash
yarn && yarn build
```
```bash then checkout the [CLI guide](/docs/cli.md) for examples of commands that can be run on this watcher.
yarn server
```
GQL console: http://localhost:3012/graphql
* If the watcher is an `active` watcher:
* Run the job-runner:
```bash
yarn job-runner
```
* Run the server:
```bash
yarn server
```
GQL console: http://localhost:3012/graphql
* To watch a contract:
```bash
yarn watch:contract --address <contract-address> --kind <contract-kind> --checkpoint <true | false> --starting-block [block-number]
```
* `address`: Address or identifier of the contract to be watched.
* `kind`: Kind of the contract.
* `checkpoint`: Turn checkpointing on (`true` | `false`).
* `starting-block`: Starting block for the contract (default: `1`).
Examples:
Watch a contract with its address and checkpointing on:
```bash
yarn watch:contract --address 0x1F78641644feB8b64642e833cE4AFE93DD6e7833 --kind ERC20 --checkpoint true
```
Watch a contract with its identifier and checkpointing on:
```bash
yarn watch:contract --address MyProtocol --kind protocol --checkpoint true
```
* To fill a block range:
```bash
yarn fill --start-block <from-block> --end-block <to-block>
```
* `start-block`: Block number to start filling from.
* `end-block`: Block number till which to fill.
* To create a checkpoint for a contract:
```bash
yarn checkpoint create --address <contract-address> --block-hash [block-hash]
```
* `address`: Address or identifier of the contract for which to create a checkpoint.
* `block-hash`: Hash of a block (in the pruned region) at which to create the checkpoint (default: latest canonical block hash).
* To verify a checkpoint:
```bash
yarn checkpoint verify --cid <checkpoint-cid>
```
`cid`: CID of the checkpoint for which to verify.
* To reset the watcher to a previous block number:
* Reset watcher:
```bash
yarn reset watcher --block-number <previous-block-number>
```
* Reset job-queue:
```bash
yarn reset job-queue
```
* Reset state:
```bash
yarn reset state --block-number <previous-block-number>
```
* `block-number`: Block number to which to reset the watcher.
* To export and import the watcher state:
* In source watcher, export watcher state:
```bash
yarn export-state --export-file [export-file-path] --block-number [snapshot-block-height]
```
* `export-file`: Path of file to which to export the watcher data.
* `block-number`: Block height at which to take snapshot for export.
* In target watcher, run job-runner:
```bash
yarn job-runner
```
* Import watcher state:
```bash
yarn import-state --import-file <import-file-path>
```
* `import-file`: Path of file from which to import the watcher data.
* Run server:
```bash
yarn server
```
* To inspect a CID:
```bash
yarn inspect-cid --cid <cid>
```
* `cid`: CID to be inspected.

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@ -302,125 +302,4 @@ yarn checkpoint create --address $NFT_ADDRESS
- The state should have auto indexed data and also custom property `transferCount` according to code in [hooks](./src/hooks.ts) file `handleEvent` method. - The state should have auto indexed data and also custom property `transferCount` according to code in [hooks](./src/hooks.ts) file `handleEvent` method.
## Watch For more `yarn` sub-commands available, see the [CLI guide](/docs/cli.md)
To watch a contract:
```bash
yarn watch:contract --address <contract-address> --kind <contract-kind> --checkpoint <true | false> --starting-block [block-number]
```
* `address`: Address or identifier of the contract to be watched.
* `kind`: Kind of the contract.
* `checkpoint`: Turn checkpointing on (`true` | `false`).
* `starting-block`: Starting block for the contract (default: `1`).
Examples:
Watch a contract with its address and checkpointing on:
```bash
yarn watch:contract --address 0x1F78641644feB8b64642e833cE4AFE93DD6e7833 --kind ERC721 --checkpoint true
```
Watch a contract with its identifier and checkpointing on:
```bash
yarn watch:contract --address MyProtocol --kind protocol --checkpoint true
```
* To fill a block range:
```bash
yarn fill --start-block <from-block> --end-block <to-block>
```
* `start-block`: Block number to start filling from.
* `end-block`: Block number till which to fill.
* To create a checkpoint for a contract:
```bash
yarn checkpoint create --address <contract-address> --block-hash [block-hash]
```
* `address`: Address or identifier of the contract for which to create a checkpoint.
* `block-hash`: Hash of a block (in the pruned region) at which to create the checkpoint (default: latest canonical block hash).
* To reset the watcher to a previous block number:
* Reset watcher:
```bash
yarn reset watcher --block-number <previous-block-number>
```
* Reset job-queue:
```bash
yarn reset job-queue
```
* Reset state:
```bash
yarn reset state --block-number <previous-block-number>
```
* `block-number`: Block number to which to reset the watcher.
* To export and import the watcher state:
* In source watcher, export watcher state:
```bash
yarn export-state --export-file [export-file-path] --block-number [snapshot-block-height]
```
* `export-file`: Path of file to which to export the watcher data.
* `block-number`: Block height at which to take snapshot for export.
* In target watcher, run job-runner:
```bash
yarn job-runner
```
* Import watcher state:
```bash
yarn import-state --import-file <import-file-path>
```
* `import-file`: Path of file from which to import the watcher data.
* Run server:
```bash
yarn server
```
* To inspect a CID:
```bash
yarn inspect-cid --cid <cid>
```
* `cid`: CID to be inspected.
## Customize
* Indexing on an event:
* Edit the custom hook function `handleEvent` (triggered on an event) in [hooks.ts](./src/hooks.ts) to perform corresponding indexing using the `Indexer` object.
* While using the indexer storage methods for indexing, pass `diff` as true if default state is desired to be generated using the state variables being indexed.
* Generating state:
* Edit the custom hook function `createInitialState` (triggered if the watcher passes the start block, checkpoint: `true`) in [hooks.ts](./src/hooks.ts) to save an initial `State` using the `Indexer` object.
* Edit the custom hook function `createStateDiff` (triggered on a block) in [hooks.ts](./src/hooks.ts) to save the state in a `diff` `State` using the `Indexer` object. The default state (if exists) is updated.
* Edit the custom hook function `createStateCheckpoint` (triggered just before default and CLI checkpoint) in [hooks.ts](./src/hooks.ts) to save the state in a `checkpoint` `State` using the `Indexer` object.

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* All the `State` entries can be seen in `pg-admin` in table `state`. * All the `State` entries can be seen in `pg-admin` in table `state`.
## Customize
* Indexing on an event:
* Edit the custom hook function `handleEvent` (triggered on an event) in [hooks.ts](./src/hooks.ts) to perform corresponding indexing using the `Indexer` object.
* While using the indexer storage methods for indexing, pass `diff` as true if default state is desired to be generated using the state variables being indexed.
* Generating state:
* Edit the custom hook function `createInitialState` (triggered if the watcher passes the start block, checkpoint: `true`) in [hooks.ts](./src/hooks.ts) to save an initial `State` using the `Indexer` object.
* Edit the custom hook function `createStateDiff` (triggered on a block) in [hooks.ts](./src/hooks.ts) to save the state in a `diff` `State` using the `Indexer` object. The default state (if exists) is updated.
* Edit the custom hook function `createStateCheckpoint` (triggered just before default and CLI checkpoint) in [hooks.ts](./src/hooks.ts) to save the state in a `checkpoint` `State` using the `Indexer` object.
* The existing example hooks in [hooks.ts](./src/hooks.ts) are for an `ERC20` contract. * The existing example hooks in [hooks.ts](./src/hooks.ts) are for an `ERC20` contract.

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@ -279,20 +279,3 @@ yarn inspect-cid --cid <cid>
``` ```
* `cid`: CID to be inspected. * `cid`: CID to be inspected.
## Customize
* Indexing on an event:
* Edit the custom hook function `handleEvent` (triggered on an event) in [hooks.ts](./src/hooks.ts) to perform corresponding indexing using the `Indexer` object.
* While using the indexer storage methods for indexing, pass `diff` as true if default state is desired to be generated using the state variables being indexed.
* Generating state:
* Edit the custom hook function `createInitialState` (triggered if the watcher passes the start block, checkpoint: `true`) in [hooks.ts](./src/hooks.ts) to save an initial `State` using the `Indexer` object.
* Edit the custom hook function `createStateDiff` (triggered on a block) in [hooks.ts](./src/hooks.ts) to save the state in a `diff` `State` using the `Indexer` object. The default state (if exists) is updated.
* Edit the custom hook function `createStateCheckpoint` (triggered just before default and CLI checkpoint) in [hooks.ts](./src/hooks.ts) to save the state in a `checkpoint` `State` using the `Indexer` object.