ipld-eth-db-validator

ipld-eth-db-validator performs validation checks on indexed Ethereum IPLD objects in a Postgres database:

• Attempt to apply transactions in each block and validate resultant block hash
• Check referential integrity between IPLD blocks and index tables

Setup

Build the binary:

make build

Configuration

An example config file:

[database]
  # db credentials
  name     = "cerc_public" # DATABASE_NAME
  hostname = "localhost"   # DATABASE_HOSTNAME
  port     = 5432          # DATABASE_PORT
  user     = "vdbm"        # DATABASE_USER
  password = "..."         # DATABASE_PASSWORD

[validate]
  # block height to initiate database validation at
  fromBlock = 1      # VALIDATE_FROM_BLOCK  (default: 1)
  # number of blocks to trail behind the head
  trail = 64         # VALIDATE_TRAIL  (default: 64)
  # retry interval after validator has caught up to (head-trail) height (in sec)
  retryInterval = 10  # VALIDATE_RETRY_INTERVAL (default: 10)

  # whether to perform a statediffing call on a missing block
  stateDiffMissingBlock = true # (default: false)
  # statediffing call timeout period (in sec)
  stateDiffTimeout = 240 # (default: 240)

[ethereum]
  # node info
  # path to json chain config (optional)
  chainConfig = ""            # ETH_CHAIN_CONFIG
  # eth chain id for config (overridden by chainConfig)
  chainID = "1"               # ETH_CHAIN_ID (default: 1)
  # http RPC endpoint URL for a statediffing node
  httpPath = "localhost:8545" # ETH_HTTP_PATH

[prom]
  # prometheus metrics
  metrics = true        # PROM_METRICS    (default: false)
  http = true           # PROM_HTTP       (default: false)
  httpAddr = "0.0.0.0"  # PROM_HTTP_ADDR  (default: 127.0.0.1)
  httpPort = "9001"     # PROM_HTTP_PORT  (default: 9001)
  dbStats = true        # PROM_DB_STATS   (default: false)

[log]
  # log level (trace, debug, info, warn, error, fatal, panic)
  level = "info"  # LOG_LEVEL (default: info)
  # file path for logging, leave unset to log to stdout
  file  = ""      # LOG_FILE_PATH

• The validation process trails behind the latest block number in the database by config parameter validate.trail.

• If the validator has caught up to (head-trail) height, it waits for a configured time interval (validate.retryInterval) before again querying the database.

• If the validator encounters a missing block (gap) in the database, it makes a writeStateDiffAt call to the configured statediffing endpoint (ethereum.httpPath) if validate.stateDiffMissingBlock is set to true. Here it is assumed that the statediffing node pointed to is writing out to the database.

Local Setup

• Create a chain config file chain.json according to chain config in genesis json file used by local geth.

  Example:

  {
    "chainId": 41337,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "clique": {
      "period": 5,
      "epoch": 30000
    }
  }

  Provide the path to the above file in the config.

Usage

• Create / update the config file (refer to example config above).

• Run validator:

  ./ipld-eth-db-validator stateValidator --config=<config path>

  Example:

  ./ipld-eth-db-validator stateValidator --config=environments/example.toml

Monitoring

• Enable metrics using config parameters prom.metrics and prom.http.
• ipld-eth-db-validator exposes following prometheus metrics at /metrics endpoint:
  • last_validated_block: Last validated block number.
  • DB stats if prom.dbStats set to true.

Tests

• Follow Test Instructions to run unit and integration tests locally.