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Chain events tracker and indexer

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README.md

cic-chain-events

CIC Chain Events

Filters live (and past) transactions on Celo and emits relevant events to a NATS JetStream sink for further processing/indexing.

Prerequisites

Linux OS (amd64) or Docker
Postgres >= 14
Celo geth with GraphQL API enabled
NATS server with JetStream enabled

Usage

The provided docker-compose.yaml is the fastest way to get up and running. Bring up the Postgres and NATS conatiners with docker-compose up -d

1. Run migrations

Run the SQL migrations inside the migrations folder with psql or tern (recommended).

2. Update the config

The base config is described in config.toml. Values can be overriden with env variables e.g. to disable metrics, set METRICS_GO_PROCESS=false.

3. Start the service

Compiling the binary

Run make build or download pre-compiled binaries from the releases page.

Then start the service with ./cic-chain-events

Optional flags:

-config - config.toml file path
-debug - Enable/disable debug level logs
-queries - queries.sql file path

Docker

To pull the pre-built docker image:

docker pull ghcr.io/grassrootseconomics/cic-chain-events/cic-chain-events:latest

Or to build it:

DOCKER_BUILDKIT=1 COMPOSE_DOCKER_CLI_BUILD=1 docker-compose -f docker-compose.build.yaml build --progress plain

4. NATS JetStream consumer

A consumer with the following NATS JetStream config is required:

Durable
Stream: CHAIN.* (See config.toml for stream subjects)

Benthos (Benthos can act as a JetStream consumer) example.

# config.yaml
input:
  label: jetstream
  nats_jetstream:
    urls:
      - nats://127.0.0.1:4222
    subject: "CHAIN.*"
    durable: benthos
    deliver: all
output:
  stdout:
    codec: lines

Then run:

benthos -c config.yaml

Functionality

License

AGPL-3.0.