Substreams Prometheus sink module

substreams-sink-prometheus is a tool that allows developers to pipe data extracted metrics from a blockchain into a Prometheus time series database.

📖 Documentation

https://docs.rs/substreams-sink-prometheus

Further resources

• Substreams documentation
• Prometheus documentation

🛠 Feature Roadmap

Gauge Metric

• [x] Set
• [x] Inc
• [x] Dec
• [x] Add
• [x] Sub
• [x] SetToCurrentTime

Counter Metric

• [x] Inc
• [x] Add

Histogram Metric

• [ ] Observe
• [ ] buckets
• [ ] zero

Summary Metric

Summaries calculate percentiles of observed values. - [ ] Observe - [ ] percentiles - [ ] maxAgeSeconds - [ ] ageBuckets - [ ] startTimer

Registry

• [ ] Clear
• [ ] SetDefaultLabels
• [ ] RemoveSingleMetric

Install

$ cargo add substreams-sink-prometheus

Quickstart

Cargo.toml

toml [dependencies] substreams = "0.5" substreams-sink-prometheus = "0.1"

src/lib.rs

```rust use substreams::prelude::*; use substreams::errors::Error; use substreamssinkprometheus::{PrometheusOperations, Counter, Gauge};

[substreams::handlers::map]

fn prom_out( ... some stores ... ) -> Result {

let mut prom_ops: PrometheusOperations = Default::default();

// Gauge Metric
// ============
// Initialize Gauge with a name & labels
let mut gauge = Gauge::new("gauge_name");
gauge.set_label("custom_label");

// Sets the Gauge to an arbitrary value.
prom_ops.push(gauge.set(88.8));

// Increments the Gauge by 1.
prom_ops.push(gauge.inc());

// Decrements the Gauge by 1.
prom_ops.push(gauge.dec());

// Adds an arbitrary value to a Gauge. (The value can be negative, resulting in a decrease of the Gauge.)
prom_ops.push(gauge.add(50.0));
prom_ops.push(gauge.add(-10.0));

// Subtracts arbitrary value from the Gauge. (The value can be negative, resulting in an increase of the Gauge.)
prom_ops.push(gauge.sub(25.0));
prom_ops.push(gauge.sub(-5.0));

// Set Gauge to the current Unix time in seconds.
prom_ops.push(gauge.set_to_current_time());

// Counter Metric
// ==============
// Increments the Counter by 1.
let mut counter = Counter::new("counter_name");
prom_ops.push(counter.inc());

// Adds an arbitrary value to a Counter. (Returns an error if the value is < 0.)
prom_ops.push(counter.add(123.456));

// Set Counter to the current Unix time in seconds.
prom_ops.push(counter.set_to_current_time());

Ok(prom_ops)

} ```