# eth-json-rpc-filters

> [json-rpc-engine](https://github.com/MetaMask/json-rpc-engine) middleware implementing ethereum filter methods. Backed by an [eth-block-tracker](https://github.com/MetaMask/eth-block-tracker) and web3 provider interface (`web3.currentProvider`).

Latest version **6.0.1** (published 2023-09-22) · ISC license · 0 weekly downloads

## Install

```sh
npm install eth-json-rpc-filters
pnpm add eth-json-rpc-filters
yarn add eth-json-rpc-filters
bun add eth-json-rpc-filters
```

## Health

**Score 25/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned.

## Facts

| | |
|---|---|
| Version | 6.0.1 |
| Published | 2023-09-22 |
| First published | 2017-08-23 |
| Weekly downloads | 0 |
| License | ISC |
| TypeScript types | none |
| Module format | CommonJS |
| Node | >=14.0.0 |
| Dependencies | 5 |
| Unpacked size | 26.9 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 29 |
| Maintainers | lgbot, naugtur, ritave, danfinlay, kumavis, rekmarks, metamaskbot, gudahtt, brad.decker, sethkfman |

## Links

- npm: https://www.npmjs.com/package/eth-json-rpc-filters
- Repository: https://github.com/MetaMask/eth-json-rpc-filters
- Homepage: https://github.com/MetaMask/eth-json-rpc-filters#readme
- Issues: https://github.com/MetaMask/eth-json-rpc-filters/issues
- npm.io page: https://npm.io/package/eth-json-rpc-filters

## Dependencies (5)

- [pify](https://npm.io/package/pify.md) ^5.0.0
- [eth-query](https://npm.io/package/eth-query.md) ^2.1.2
- [async-mutex](https://npm.io/package/async-mutex.md) ^0.2.6
- [json-rpc-engine](https://npm.io/package/json-rpc-engine.md) ^6.1.0
- [@metamask/safe-event-emitter](https://npm.io/package/@metamask/safe-event-emitter.md) ^3.0.0

## Recent versions

- 6.0.1 (latest) — 2023-09-22
- 6.0.0 — 2023-02-16
- 5.1.0 — 2023-01-13
- 5.0.0 — 2022-05-10
- 4.2.2 — 2021-02-05
- 4.2.1 — 2020-09-23
- 4.2.0 — 2020-09-23
- 4.1.1 — 2019-10-29
- 4.1.0 — 2019-08-20
- 3.0.4 — 2019-06-05
- 3.0.3 — 2019-05-08
- 4.0.3 — 2019-05-08
- 4.0.2 — 2019-03-29
- 4.0.1 — 2019-03-18
- 4.0.0 — 2019-03-11
- … 18 more at https://npm.io/package/eth-json-rpc-filters/versions

## README

# eth-json-rpc-filters

[json-rpc-engine](https://github.com/kumavis/json-rpc-engine) middleware implementing ethereum filter methods.
Backed by an [eth-block-tracker](https://github.com/MetaMask/eth-block-tracker) and web3 provider interface (`web3.currentProvider`).

### supported rpc methods
- `eth_newFilter`
- `eth_newBlockFilter`
- `eth_newPendingTransactionFilter`
- `eth_uninstallFilter`
- `eth_getFilterChanges`
- `eth_getFilterLogs`

### usage

basic usage:
```js
const filterMiddleware = createFilterMiddleware({ blockTracker, provider })
engine.push(filterMiddleware)
```

cleanup:
```js
// remove blockTracker handler to free middleware for garbage collection
filterMiddleware.destroy()
```

## Running Tests

```bash
yarn test
```

### Changelog

##### 2.0

- expect EthBlockTracker@4

---
_Source: https://npm.io/package/eth-json-rpc-filters · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._