ipld-eth-server/documentation/data-syncing.md

Syncing commands

These commands are used to sync raw Ethereum data into Postgres, with varying levels of data granularity.

headerSync

Syncs block headers from a running Ethereum node into the VulcanizeDB table headers.

• Queries the Ethereum node using RPC calls.
• Validates headers from the last 15 blocks to ensure that data is up to date.
• Useful when you want a minimal baseline from which to track targeted data on the blockchain (e.g. individual smart contract storage values or event logs).
• Handles chain reorgs by validating the most recent blocks' hashes. If the hash is different from what we have already stored in the database, the header record will be updated.

Usage

• Run: ./vulcanizedb headerSync --config <config.toml> --starting-block-number <block-number>
• The config file must be formatted as follows, and should contain an ipc path to a running Ethereum node:

[database]
    name     = "vulcanize_public"
    hostname = "localhost"
    user     = "vulcanize"
    password = "vulcanize"
    port     = 5432

[client]
    ipcPath  = <path to a running Ethereum node>

• Alternatively, the ipc path can be passed as a flag instead --client-ipcPath.