Waves blockchain — PostgreSQL sync scripts

A set of scripts to download and update Waves blockchain history data into a PostgreSQL 11.x database.

Usage

1. Clone the repository, install dependencies.

   npm install

2. Create config.yml file in the project, using config.example.yml for reference.

3. In PostgreSQL, create empty database.

4. Set environment variable MIGRATE to true (or just run crawler like this: MIGRATE=true npm run ...), it will apply initial and all additional migrations to yours database.

5. ⬇️ To download a range of blocks to database:

   npm run download {start} {end},
   # for example
   npm run download 1 1000000

   Blocks from the range get inserted in a single transaction, so either all get inserted, or none. In our experience ranges of 10000—100000 work best.

6. 🔄 To keep your database up-to-date:

   npm run updateComposite

   This is a continuous script, so you may want to run it in the background. We recommend using some kind of process manager (e.g. pm2) to restart the process on crash.

Migrations

1. Create migration:

   ./node_modules/.bin/knex --migrations-directory migrations migrate:make $MIGRATION_NAME

2. Migrate latest:

   ./node_modules/.bin/knex migrate:latest --client postgresql --connection postgresql://$PGUSER:$PGPASSWORD@$PGHOST:$PGPORT/$PGDATABASE --migrations-directory migrations
   # OR
   npm run migrate -- --connection postgresql://$PGUSER:$PGPASSWORD@$PGHOST:$PGPORT/$PGDATABASE