eth-statediff-service

standalone statediffing service on top of LevelDB

Purpose:

Stand up a statediffing service directly on top of a go-ethereum LevelDB instance. This service can serve historical state data over the same rpc interface as statediffing geth without needing to run a full node.

Setup

Build the binary:

make build

Configuration

An example config file:

[leveldb]
    # LevelDB access mode <local | remote>
    mode = "local"  # LEVELDB_MODE

    # in local mode
    # LevelDB paths
    path    = "/Users/user/Library/Ethereum/geth/chaindata"         # LEVELDB_PATH
    ancient = "/Users/user/Library/Ethereum/geth/chaindata/ancient" # LEVELDB_ANCIENT

    # in remote mode
    # URL for leveldb-ethdb-rpc endpoint
    url = "http://127.0.0.1:8082/"  # LEVELDB_URL

[server]
    ipcPath  = ".ipc"           # SERVICE_IPC_PATH
    httpPath = "127.0.0.1:8545" # SERVICE_HTTP_PATH

[statediff]
    prerun          = true  # STATEDIFF_PRERUN
    serviceWorkers  = 1     # STATEDIFF_SERVICE_WORKERS
    workerQueueSize = 1024  # STATEDIFF_WORKER_QUEUE_SIZE
    trieWorkers     = 4     # STATEDIFF_TRIE_WORKERS

[prerun]
    only = false     # PRERUN_ONLY
    parallel = true  # PRERUN_PARALLEL

    # to perform prerun in a specific range (optional)
    start = 0   # PRERUN_RANGE_START
    stop  = 100 # PRERUN_RANGE_STOP

    # to perform prerun over multiple ranges (optional)
    ranges = [
        [101, 1000]
    ]

    # statediffing params for prerun
    [prerun.params]
        intermediateStateNodes   = true # PRERUN_INTERMEDIATE_STATE_NODES
        intermediateStorageNodes = true # PRERUN_INTERMEDIATE_STORAGE_NODES
        includeBlock             = true # PRERUN_INCLUDE_BLOCK
        includeReceipts          = true # PRERUN_INCLUDE_RECEIPTS
        includeTD                = true # PRERUN_INCLUDE_TD
        includeCode              = true # PRERUN_INCLUDE_CODE
        watchedAddresses         = []

[log]
    file  = ""      # LOG_FILE_PATH
    level = "info"  # LOG_LEVEL

[database]
    # output type <postgres | file | dump>
    type = "postgres"

    # with postgres type
    # db credentials
    name     = "vulcanize_test" # DATABASE_NAME
    hostname = "localhost"      # DATABASE_HOSTNAME
    port     = 5432             # DATABASE_PORT
    user     = "vulcanize"      # DATABASE_USER
    password = "..."            # DATABASE_PASSWORD
    driver   = "sqlx"           # DATABASE_DRIVER_TYPE <sqlx | pgx>

    # with file type
    # file mode <sql | csv>
    fileMode = "csv"    # DATABASE_FILE_MODE

    # with SQL file mode
    filePath = ""   # DATABASE_FILE_PATH

    # with CSV file mode
    fileCsvDir = "output_dir" # DATABASE_FILE_CSV_DIR

    # with dump type
    # <stdout | stderr | discard>
    dumpDestination = ""    # DATABASE_DUMP_DST

[cache]
    database = 1024 # DB_CACHE_SIZE_MB
    trie     = 1024 # TRIE_CACHE_SIZE_MB

[prom]
    # prometheus metrics
    metrics  = true         # PROM_METRICS
    http     = true         # PROM_HTTP
    httpAddr = "localhost"  # PROM_HTTP_ADDR
    httpPort = "8889"       # PROM_HTTP_PORT
    dbStats = true          # PROM_DB_STATS

[ethereum]
    # node info
    nodeID       = ""                       # ETH_NODE_ID
    clientName   = "eth-statediff-service"  # ETH_CLIENT_NAME
    networkID    = 1                        # ETH_NETWORK_ID
    chainID      = 1                        # ETH_CHAIN_ID
    genesisBlock = "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3" # ETH_GENESIS_BLOCK

    # path to custom chain config file (optional)
    # keep chainID same as that in chain config file
    chainConfig  = "./chain.json"           # ETH_CHAIN_CONFIG

[debug]
    pprof = false                           # DEBUG_PPROF

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).

serve

• To serve the statediff RPC API:

  ./eth-statediff-service serve --config=<config path>
  

  Example:

  ./eth-statediff-service serve --config environments/config.toml
  

• Available RPC methods:

  • statediff_stateTrieAt()
  • statediff_streamCodeAndCodeHash()
  • statediff_stateDiffAt()
  • statediff_writeStateDiffAt()
  • statediff_writeStateDiffsInRange()

  Example:

  curl -X POST -H 'Content-Type: application/json' --data '{"jsonrpc":"2.0","method":"statediff_writeStateDiffsInRange","params":['"$BEGIN"', '"$END"', {"intermediateStateNodes":true,"intermediateStorageNodes":true,"includeBlock":true,"includeReceipts":true,"includeTD":true,"includeCode":true}],"id":1}' "$HOST":"$PORT"
  

• Prerun:

  • The process can be configured locally with sets of ranges to process as a "prerun" to processing directed by the server endpoints.
  • This is done by turning "prerun" on in the config (statediff.prerun = true) and defining ranges and params in the prerun section of the config.
  • Set the range using prerun.start and prerun.stop. Use prerun.ranges if prerun on more than one range is required.

• NOTE: Currently, params.includeTD must be set to / passed as true.

Monitoring

• Enable metrics using config parameters prom.metrics and prom.http.
• eth-statediff-service exposes following prometheus metrics at /metrics endpoint:
  • ranges_queued: Number of range requests currently queued.
  • loaded_height: The last block that was loaded for processing.
  • processed_height: The last block that was processed.
  • stats.t_block_load: Block loading time.
  • stats.t_block_processing: Block (header, uncles, txs, rcts, tx trie, rct trie) processing time.
  • stats.t_state_processing: State (state trie, storage tries, and code) processing time.
  • stats.t_postgres_tx_commit: Postgres tx commit time.
  • http.count: HTTP request count.
  • http.duration: HTTP request duration.
  • ipc.count: Unix socket connection count.

Tests

• Run unit tests:

  make test
  

Import output data in file mode into a database

• When eth-statediff-service is run in file mode (database.type) the output is in form of a SQL file or multiple CSV files.

SQL

• Assuming the output files are located in host's ./output_dir directory.

• Create a directory to store post-processed output:

  mkdir -p output_dir/processed_output
  

• (Optional) Get row counts in the output:

  wc -l output_dir/statediff.sql > output_stats.txt
  

• De-duplicate data:

  sort -u output_dir/statediff.sql -o output_dir/processed_output/deduped-statediff.sql
  

• Copy over the post-processed output files to the DB server (say in /output_dir).

• Run the following to import data:

  psql -U <DATABASE_USER> -h <DATABASE_HOSTNAME> -p <DATABASE_PORT> <DATABASE_NAME> --set ON_ERROR_STOP=on -f /output_dir/processed_output/deduped-statediff.sql
  

CSV

• Create an env file with the required variables. Refer .sample.env.

• (Optional) Get row counts in the output:

  ./scripts/count-lines.sh <ENV_FILE_PATH>
  

• De-duplicate data:

  ./scripts/dedup.sh <ENV_FILE_PATH>
  

• Perform column checks:

  ./scripts/check-columns.sh <ENV_FILE_PATH>
  

  Check the output logs for any rows detected with unexpected number of columns.

  Example:

  # log
  eth.header_cids
  Start: Wednesday 21 September 2022 06:00:38 PM IST
  Time taken: 00:00:05
  End: Wednesday 21 September 2022 06:00:43 PM IST
  Total bad rows: 1 ./check-columns/eth.header_cids.txt
  
  # bad row output
  # line number, num. of columns, data
  23 17 22,xxxxxx,0x07f5ea5c94aa8dea60b28f6b6315d92f2b6d78ca4b74ea409adeb191b5a114f2,0x5918487321aa57dd0c50977856c6231e7c4ee79e95b694c7c8830227d77a1ecc,bagiacgzaa726uxeuvkg6uyfsr5vwgfozf4vw26gkjn2ouqe232yzdnnbctza,45,geth,0,0xad8fa8df61b98dbda7acd6ca76d5ce4cbba663d5f608cc940957adcdb94cee8d,0xc621412320a20b4aaff5363bdf063b9d13e394ef82e55689ab703aae5db08e26,0x71ec1c7d81269ce115be81c81f13e1cc2601c292a7f20440a77257ecfdc69940,0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347,\x2000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000,1658408419,/blocks/DMQAP5PKLSKKVDPKMCZI623DCXMS6K3NPDFEW5HKICNN5MMRWWQRJ4Q,1,0x0000000000000000000000000000000000000000
  

• Import data using timescaledb-parallel-copy:
  (requires timescaledb-parallel-copy installation; readily comes with TimescaleDB docker image)

  ./scripts/timescaledb-import.sh <ENV_FILE_PATH>
  

• NOTE: COPY command on CSVs inserts empty strings as NULL in the DB. Passing FORCE_NOT_NULL <COLUMN_NAME> forces it to insert empty strings instead. This is required to maintain compatibility of the imported statediff data with the data generated in postgres mode. Reference: https://www.postgresql.org/docs/14/sql-copy.html

Stats

The binary includes a stats command which reports stats for the offline or remote levelDB.

At this time, the only stat supported is to return the latest/highest block height and hash found the levelDB, this is useful for determining what the upper limit is for a standalone statediffing process on a given levelDB.

./eth-statediff-service stats --config={path to toml config file}