coordinator-node 0.1.3

Runtime engine for Crunch coordinator nodes

coordinator-node

Runtime engine for Crunch coordinator nodes. Powers the full competition pipeline — from data ingestion through scoring to on-chain emission checkpoints.

pip install coordinator-node

---

Two ways to use this repo

1. Scaffold a new competition (recommended)

Use the Crunch CLI to create a self-contained workspace that pulls coordinator-node from PyPI:

crunch-cli init-workspace my-challenge
cd my-challenge
make deploy

This creates:

my-challenge/
├── node/          ← docker-compose, config, scripts (uses coordinator-node from PyPI)
├── challenge/     ← participant-facing package (tracker, scoring, examples)
└── Makefile

2. Develop the engine itself

Clone this repo to work on the coordinator_node package directly:

git clone https://github.com/crunchdao/coordinator-node-starter.git
cd coordinator-node-starter
uv sync
make deploy    # uses local coordinator_node/ via COPY in Dockerfile

Changes to coordinator_node/ are picked up immediately on rebuild.

---

Architecture

Pipeline

Feed → Input → Prediction → Score → Snapshot → Checkpoint → On-chain

Workers

Worker	Purpose
feed-data-worker	Ingests feed data (Pyth, Binance, etc.) via polling + backfill
predict-worker	Gets latest data → ticks models → collects predictions
score-worker	Resolves actuals → scores predictions → writes snapshots → rebuilds leaderboard
checkpoint-worker	Aggregates snapshots → builds EmissionCheckpoint for on-chain submission
report-worker	FastAPI server: leaderboard, predictions, feeds, snapshots, checkpoints

Feed Dimensions

Dimension	Example	Env var
source	pyth, binance	FEED_SOURCE
subject	BTC, ETH	FEED_SUBJECTS
kind	tick, candle	FEED_KIND
granularity	1s, 1m	FEED_GRANULARITY

Status Lifecycles

Input:       RECEIVED → RESOLVED
Prediction:  PENDING → SCORED / FAILED / ABSENT
Checkpoint:  PENDING → SUBMITTED → CLAIMABLE → PAID

---

Configuration

All configuration is via environment variables. Copy the example env file to get started:

cp .local.env.example .local.env

Key variables:

Variable	Description	Default
CRUNCH_ID	Competition identifier	starter-challenge
FEED_SOURCE	Data source	pyth
FEED_SUBJECTS	Assets to track	BTC
SCORING_FUNCTION	Dotted path to scoring callable	coordinator_node.extensions.default_callables:default_score_prediction
CHECKPOINT_INTERVAL_SECONDS	Seconds between checkpoints	604800
MODEL_BASE_CLASSNAME	Participant model base class	tracker.TrackerBase
MODEL_RUNNER_NODE_HOST	Model orchestrator host	model-orchestrator

---

Extension Points

Customize competition behavior by setting callable paths in your env:

Env var	Purpose
SCORING_FUNCTION	Score a prediction against ground truth
INFERENCE_INPUT_BUILDER	Transform raw feed data into model input
INFERENCE_OUTPUT_VALIDATOR	Validate model output shape/values
MODEL_SCORE_AGGREGATOR	Aggregate per-model scores across predictions
LEADERBOARD_RANKER	Custom leaderboard ranking strategy

---

Contract

All type shapes and behavior are defined in a single CrunchContract:

from coordinator_node.contracts import CrunchContract

class CrunchContract(BaseModel):
    raw_input_type: type[BaseModel]
    output_type: type[BaseModel]
    score_type: type[BaseModel]
    scope: PredictionScope
    aggregation: Aggregation

    # Callables
    resolve_ground_truth: Callable
    aggregate_snapshot: Callable
    build_emission: Callable

---

Report API

Endpoint	Description
GET /reports/leaderboard	Current leaderboard
GET /reports/models	Registered models
GET /reports/predictions	Prediction history
GET /reports/feeds	Active feed subscriptions
GET /reports/snapshots	Per-model period summaries
GET /reports/checkpoints	Checkpoint history
GET /reports/checkpoints/{id}/emission	Raw emission (frac64)
GET /reports/checkpoints/{id}/emission/cli-format	CLI JSON format
GET /reports/emissions/latest	Latest emission
POST /reports/checkpoints/{id}/confirm	Record tx_hash
PATCH /reports/checkpoints/{id}/status	Advance status

---

Emission Checkpoints

Checkpoints produce EmissionCheckpoint matching the on-chain protocol:

{
    "crunch": "<pubkey>",
    "cruncher_rewards": [{"cruncher_index": 0, "reward_pct": 350000000}],
    "compute_provider_rewards": [],
    "data_provider_rewards": []
}

reward_pct uses frac64 (1,000,000,000 = 100%).

---

Database Tables

Feed layer

Table	Purpose
feed_records	Raw data points from external sources. Keyed by (source, subject, kind, granularity, ts_event). Values and metadata stored as JSONB.
feed_ingestion_state	Tracks the last ingested timestamp per feed scope to enable incremental polling and backfill.

Pipeline layer

Table	Purpose
inputs	Incoming data events. Status: RECEIVED → RESOLVED. Holds raw data, actuals (once known), and scope metadata.
predictions	One row per model per input. Links to a scheduled_prediction_config. Stores inference output, execution time, and resolution timestamp. Status: PENDING → SCORED / FAILED / ABSENT.
scores	One row per scored prediction. Stores the result payload, success flag, and optional failure reason.
snapshots	Per-model period summaries. Aggregates prediction counts and result metrics over a time window.
checkpoints	Periodic emission checkpoints. Aggregates snapshots into on-chain reward distributions. Status: PENDING → SUBMITTED → CLAIMABLE → PAID.
scheduled_prediction_configs	Defines when and what to predict — scope template, schedule, and ordering. Seeded at init from scheduled_prediction_configs.json.

Model layer

Table	Purpose
models	Registered participant models. Tracks overall and per-scope scores as JSONB.
leaderboards	Point-in-time leaderboard snapshots with ranked entries as JSONB.

---

Local Development

# Run tests
uv run pytest tests/ -x -q

# Start all services locally
make deploy

# View logs
make logs

# Tear down
make down

---

Project Structure

coordinator-node-starter/
├── coordinator_node/       ← core engine (published to PyPI as coordinator-node)
│   ├── workers/            ← feed, predict, score, checkpoint, report workers
│   ├── services/           ← business logic
│   ├── entities/           ← domain models
│   ├── db/                 ← database tables and init
│   ├── feeds/              ← data source adapters (Pyth, Binance, etc.)
│   ├── schemas/            ← API schemas
│   ├── extensions/         ← default callables
│   ├── config/             ← runtime configuration
│   └── contracts.py        ← competition shape: types, scope, and callable hooks
├── base/                   ← template used by crunch-cli init-workspace
│   ├── node/               ← node template (Dockerfile, docker-compose, config)
│   └── challenge/          ← challenge template (tracker, scoring, examples)
├── tests/                  ← test suite
├── docker-compose.yml      ← local dev compose (uses local coordinator_node/)
├── Dockerfile              ← local dev Dockerfile (COPYs coordinator_node/)
├── pyproject.toml          ← package definition
└── Makefile                ← deploy / down / logs / test

---

Publishing

uv build
twine upload dist/*