Vulcanize DB

Dependencies

• Go 1.9+
• Postgres 10
• Go Ethereum
  • https://ethereum.github.io/go-ethereum/downloads/

Installation

go get github.com/vulcanize/vulcanizedb

Setting up the Databases

1. Install Postgres

2. Create a superuser for yourself and make sure psql --list works without prompting for a password.

3. createdb vulcanize_private

4. cd $GOPATH/src/github.com/vulcanize/vulcanizedb

5. Import the schema: psql vulcanize_private < db/schema.sql

   or run the migrations: make migrate HOST_NAME=localhost NAME=vulcanize_public PORT=5432

   • See below for configuring additional environments

Adding a new migration: ./scripts/create_migration <migration-name>

Start syncing with postgres

1. Start geth node (if fast syncing wait for geth to finsh initial sync)

2. In a separate terminal start vulcanize_db

   • vulcanizedb sync --config <config.toml> --starting-block-number <block-numbe>
   • see environments for example config

Watch specific events

1. Start geth
2. In a separate terminal start vulcanize_db
   • vulcanizedb sync --config <config.toml> --starting-block-number <block-numbe>
3. Create event filter
   • vulcanizedb addFilter --config <config.toml> --filter-filepath <filter.json>
4. The filters are tracked in the log_filters table and the filtered events will show up in the watched_log_events view
   • see ./filters for example filter

Development Setup

Creating/Using a test node

Syncing the against the public network takes many hours for the initial sync and will download 20+ GB of data. Here are some instructions for creating a private test node that does not depend on having a network connection.

1. Run ./scripts/setup to create a private blockchain with a new account.
   • This will result in a warning.
2. Run ./scripts/start_private_blockchain.

IPC File Paths

The default location for Ethereum is:

• $HOME/Library/Ethereum for Mac
• $HOME/.ethereum for Ubuntu
• $GOPATH/src/gihub.com/vulcanize/vulcanizedb/test_data_dir/geth.ipc for private blockchain.

Note the location of the ipc file is printed to the console when you start geth. It is needed to for configuration

Running the Tests

Unit Tests

1. go test ./pkg/...

Integration Test

In order to run the integration tests, you will need to run them against a real blockchain. At the moment the integration tests require Geth v1.7.2 as they depend on the --dev mode, which changed in v1.7.3

1. Run make startprivate in a separate terminal

2. Setup a test database and import the schema:

   createdb vulcanize_private

   psql vulcanize_private < db/schema.sql

3. go test ./... to run all tests.