Vulcanize DB

About

Vulcanize DB is a set of tools that make it easier for developers to write application-specific indexes and caches for dapps built on Ethereum.

Dependencies

• Go 1.9+
• Postgres 10
• Ethereum Node
  • Go Ethereum (1.8+)
  • Parity 1.8.11+

Installation

go get github.com/vulcanize/vulcanizedb

Setting up the Database

1. Install Postgres

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

3. createdb vulcanize_public

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

5. Run the migrations: make migrate HOST_NAME=localhost NAME=vulcanize_public PORT=5432

   • See below for configuring additional environments

Configuration

• To use a local Ethereum node, copy environments/public.toml.example to environments/public.toml and update the ipcPath and levelDbPath.

  • ipcPath should match the local node's IPC filepath:

    • when using geth:

      • The IPC file is called geth.ipc.
      • The geth IPC file path is printed to the console when you start geth.
      • The default location is:
        • Mac: $HOME/Library/Ethereum
        • Linux: $HOME/.ethereum

    • when using parity:

      • The IPC file is called jsonrpc.ipc.
      • The default location is:
        • Mac: $HOME/Library/Application\ Support/io.parity.ethereum/
        • Linux: $HOME/.local/share/io.parity.ethereum/

  • levelDbPath should match Geth's chaindata directory path.

    • The geth LevelDB chaindata path is printed to the console when you start geth.
    • The default location is:
      • Mac: $HOME/Library/Ethereum/geth/chaindata
      • Linux: $HOME/.ethereum/geth/chaindata
    • levelDbPath is irrelevant (and coldImport is currently unavailable) if only running parity.

• See environments/infura.toml to configure commands to run against infura, if a local node is unavailable

Start syncing with postgres

Syncs VulcanizeDB with the configured Ethereum node.

1. Start node (if fast syncing wait for initial sync to finish)
2. In a separate terminal start vulcanize_db
   • ./vulcanizedb sync --config <config.toml> --starting-block-number <block-number>

Alternatively, sync from Geth's underlying LevelDB

Sync VulcanizeDB from the LevelDB underlying a Geth node.

1. Assure node is not running, and that it has synced to the desired block height.
2. Start vulcanize_db
   • ./vulcanizedb coldImport --config <config.toml> --starting-block-number <block-number> --ending-block-number <block-number>
3. Optional flags:
   • --starting-block-number/-s: block number to start syncing from
   • --ending-block-number/-e: block number to sync to
   • --all/-a: sync all missing blocks

Running the Tests

Unit Tests

• go test ./pkg/...

Integration Tests

• go test ./... to run all tests.