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https://github.com/pinax-network/substreams-sink
Substreams Sink library
https://github.com/pinax-network/substreams-sink
streamingfast substreams thegraph
Last synced: about 2 months ago
JSON representation
Substreams Sink library
- Host: GitHub
- URL: https://github.com/pinax-network/substreams-sink
- Owner: pinax-network
- License: mit
- Created: 2023-03-28T18:27:40.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-03-03T16:50:49.000Z (4 months ago)
- Last Synced: 2024-05-04T18:00:59.018Z (about 2 months ago)
- Topics: streamingfast, substreams, thegraph
- Language: TypeScript
- Homepage:
- Size: 230 KB
- Stars: 4
- Watchers: 5
- Forks: 1
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-substreams - substreams-sink - JavaScript/TypeScript toolset to facilitate substreams sink development. (SDK / JavaScript)
README
# [`Substreams`](https://substreams.streamingfast.io/) Sink CLI `Node.js`
[](https://github.com/pinax-network/substreams-sink/actions/workflows/ci.yml)
[](https://badge.fury.io/js/substreams-sink)
> `substreams-sink` is the code template to build Substreams sinks in NodeJS. Sinks allows developers to pipe data extracted from a blockchain to a specified application.
## 📖 Documentation
### Further resources
- [**Substreams** documentation](https://substreams.streamingfast.io)
- [Subtreams sink project template Github repo](https://github.com/pinax-network/substreams-sink-template)
## Get Substreams API Key
- https://app.pinax.network
- https://app.streamingfast.io/
## 🚀 Quick start
### Installation
```bash
npm install substreams-sink
```
### Features
- [x] includes [Commander.js](https://github.com/tj/commander.js/) helper CLI
- [x] includes [tslog](https://github.com/fullstack-build/tslog) helper logger
- [x] handle reading/saving **Substreams** `cursor` from file or URL
- [x] reads config `.env` file
- [x] includes Prometheus metrics helpers
### CLI
```bash
Usage: substreams-sink run [options]
Substreams Sink
Options:
-v, --version version for substreams-sink
-e --substreams-endpoint Substreams gRPC endpoint to stream data from (env: SUBSTREAMS_ENDPOINT)
--manifest URL of Substreams package (env: MANIFEST)
--module-name Name of the output module (declared in the manifest) (env: MODULE_NAME)
-s --start-block Start block to stream from (defaults to -1, which means the initialBlock of the first module you are streaming) (default: "-1", env: START_BLOCK)
-t --stop-block Stop block to end stream at, inclusively (env: STOP_BLOCK)
-p, --params Set a params for parameterizable modules. Can be specified multiple times. (ex: -p module1=valA -p module2=valX&valY) (default: [], env: PARAMS)
--substreams-api-key API key for the Substream endpoint (env: SUBSTREAMS_API_KEY)
--delay-before-start Delay (ms) before starting Substreams (default: 0, env: DELAY_BEFORE_START)
--cursor Cursor to stream from. Leave blank for no cursor
--production-mode Enable production mode, allows cached Substreams data if available (choices: "true", "false", default: false, env: PRODUCTION_MODE)
--final-blocks-only Only process blocks that have pass finality, to prevent any reorg and undo signal by staying further away from the chain HEAD (choices: "true", "false", default: false, env: FINAL_BLOCKS_ONLY)
--inactivity-seconds If set, the sink will stop when inactive for over a certain amount of seconds (default: 300, env: INACTIVITY_SECONDS)
--headers [string...] Set headers that will be sent on every requests (ex: --headers X-HEADER=headerA) (default: {}, env: HEADERS)
--plaintext Establish GRPC connection in plaintext (choices: "true", "false", default: false, env: PLAIN_TEXT)
--verbose Enable verbose logging (choices: "true", "false", default: false, env: VERBOSE)
--hostname The process will listen on this hostname for any HTTP and Prometheus metrics requests (default: "localhost", env: HOSTNAME)
--port The process will listen on this port for any HTTP and Prometheus metrics requests (default: 9102, env: PORT)
--metrics-labels [string...] To apply generic labels to all default metrics (ex: --labels foo=bar) (default: {}, env: METRICS_LABELS)
--collect-default-metrics Collect default metrics (choices: "true", "false", default: false, env: COLLECT_DEFAULT_METRICS)
-h, --help display help for command
```
### Example
**.env**
```env
# Get Substreams API Key
# https://app.pinax.network
# https://app.streamingfast.io/
SUBSTREAMS_API_KEY=...
SUBSTREAMS_ENDPOINT=https://eth.substreams.pinax.network:443
# SPKG
MANIFEST=https://github.com/pinax-network/substreams/releases/download/blocks-v0.1.0/blocks-v0.1.0.spkg
MODULE_NAME=map_blocks
START_BLOCK=1000000
STOP_BLOCK=1000020
```
**example.js**
```js
import { commander, setup, prometheus, http, logger, fileCursor } from "substreams-sink";
const pkg = {
name: "substreams-sink",
version: "0.0.1",
description: "Substreams Sink long description",
}
// Setup CLI using Commander
const program = commander.program(pkg);
const command = commander.addRunOptions(program);
logger.setName(pkg.name);
// Setup CLI using Commander
const program = commander.program(pkg);
const command = commander.addRunOptions(program);
logger.setName(pkg.name);
// Custom Prometheus Counters
const customCounter = prometheus.registerCounter("custom_counter");
command.action(async options => {
// Get cursor from file
const cursor = fileCursor.readCursor("cursor.lock");
// Setup sink for Block Emitter
const { emitter } = await setup({...options, cursor});
emitter.on("session", (session) => {
console.log(session);
});
emitter.on("progress", (progress) => {
console.log(progress);
});
// Stream Blocks
emitter.on("anyMessage", (message, cursor, clock) => {
customCounter?.inc(1);
console.log(message);
console.log(cursor);
console.log(clock);
});
// Setup HTTP server & Prometheus metrics
http.listen(options);
// Save new cursor on each new block emitted
fileCursor.onCursor(emitter, "cursor.lock");
// Close HTTP server on close
emitter.on("close", () => {
http.server.close();
console.log("✅ finished");
})
// Start the stream
emitter.start();
})
program.parse();
```