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Rundler CLI

The Rundler Command Line Interface (CLI) offers a wide array of options and subcommands. Most options contain reasonable defaults that can be overridden.

Subcommands

  • node: Runs the Pool, Builder, and RPC servers in a single process.
  • rpc: Runs the Rpc server.
  • pool: Runs the Pool server.
  • builder: Runs the Builder server.

The pool and builder commands will also start a gRPC endpoint to allow other processes to interact with each service.

Common Options

These options are common to all subcommands and can be used globally:

Chain Specification

See chain spec for a detailed description of chain spec derivation from these options.

  • --network: Network to look up a hardcoded chain spec. (default: None)
    • env: NETWORK
  • --chain_spec: Path to a chain spec TOML file.
    • env: CHAIN_SPEC
  • (env only): Chain specification overrides.
    • env: CHAIN_*

Rundler Common

  • --node_http: EVM Node HTTP URL to use. (REQUIRED)
    • env: NODE_HTTP
  • --max_verification_gas: Maximum verification gas. (default: 5000000).
    • env: MAX_VERIFICATION_GAS
  • --max_bundle_gas: Maximum bundle gas. (default: 25000000).
    • env: MAX_BUNDLE_GAS
  • --min_stake_value: Minimum stake value. (default: 1000000000000000000).
    • env: MIN_STAKE_VALUE
  • --min_unstake_delay: Minimum unstake delay. (default: 84600).
    • env: MIN_UNSTAKE_DELAY
  • --tracer_timeout: The timeout used for custom javascript tracers, the string must be in a valid parseable format that can be used in the ParseDuration function on an ethereum node. See Docs Here. (default: 15s)
    • env: TRACER_TIMEOUT
  • --user_operation_event_block_distance: Number of blocks to search when calling eth_getUserOperationByHash. (default: all blocks)
    • env: USER_OPERATION_EVENT_BLOCK_DISTANCE
  • --max_simulate_handle_ops_gas: Maximum gas for simulating handle operations. (default: 20000000).
    • env: MAX_SIMULATE_HANDLE_OPS_GAS
  • --verification_estimation_gas_fee: The gas fee to use during verification estimation. (default: 1000000000000 10K gwei).
  • --bundle_base_fee_overhead_percent: bundle transaction base fee overhead over network pending value. (default: 27).
    • env: BUNDLE_BASE_FEE_OVERHEAD_PERCENT
  • --bundle_priority_fee_overhead_percent: bundle transaction priority fee overhead over network value. (default: 0).
    • env: BUNDLE_PRIORITY_FEE_OVERHEAD_PERCENT
  • --priority_fee_mode_kind: Priority fee mode kind. Possible values are base_fee_percent and priority_fee_increase_percent. (default: priority_fee_increase_percent).
    • options: ["base_fee_percent", "priority_fee_increase_percent"]
    • env: PRIORITY_FEE_MODE_KIND
  • --priority_fee_mode_value: Priority fee mode value. (default: 0).
    • env: PRIORITY_FEE_MODE_VALUE
  • --base_fee_accept_percent: Percentage of the current network fees a user operation must have in order to be accepted into the mempool. (default: 100).
    • env: BASE_FEE_ACCEPT_PERCENT
  • --aws_region: AWS region. (default: us-east-1).
    • env: AWS_REGION
    • (Only required if using other AWS features)
  • --unsafe: Flag for unsafe bundling mode. When set Rundler will skip checking simulation rules (and any debug_traceCall). (default: false).
    • env: UNSAFE
  • --mempool_config_path: Path to the mempool configuration file. (example: mempool-config.json, s3://my-bucket/mempool-config.json)
    • This path can either be a local file path or an S3 url. If using an S3 url, Make sure your machine has access to this file.
    • env: MEMPOOL_CONFIG_PATH
    • See here for details.
  • --disable_entry_point_v0_6: Disable entry point v0.6 support. (default: false).
    • env: DISABLE_ENTRY_POINT_V0_6
  • --num_builders_v0_6: The number of bundle builders to run on entry point v0.6 (default: 1)
    • env: NUM_BUILDERS_V0_6
  • --disable_entry_point_v0_7: Disable entry point v0.7 support. (default: false).
    • env: DISABLE_ENTRY_POINT_V0_7
  • --num_builders_v0_7: The number of bundle builders to run on entry point v0.7 (default: 1)
    • env: NUM_BUILDERS_V0_7
  • --da_gas_tracking_enabled: Enable the DA gas tracking feature of the mempool (default: false)
    • env: DA_GAS_TRACKING_ENABLED

Metrics Options

Options for the metrics server:

  • --metrics.port: Port to listen on for metrics requests. default: 8080.
    • env: METRICS_PORT
  • --metrics.host: Host to listen on for metrics requests. default: 0.0.0.0.
    • env: METRICS_HOST
  • --metrics.tags: Tags for metrics in the format key1=value1,key2=value2,....
    • env: METRICS_TAGS
  • --metrics.sample_interval_millis: Sample interval to use for sampling metrics. default: 1000.
    • env: METRICS_SAMPLE_INTERVAL_MILLIS

Logging Options

Options for logging:

  • RUST_LOG environment variable is used for controlling log level see: env_logger. Only level is supported.
  • --log.file: Log file. If not provided, logs will be written to stdout.
    • env: LOG_FILE
  • --log.json: If set, logs will be written in JSON format.
    • env: LOG_JSON

RPC Options

List of command line options for configuring the RPC API.

  • --rpc.port: Port to listen on for JSON-RPC requests (default: 3000)
    • env: RPC_PORT
  • --rpc.host: Host to listen on for JSON-RPC requests (default: 0.0.0.0)
    • env: RPC_HOST
  • --rpc.api: Which APIs to expose over the RPC interface (default: eth,rundler)
    • env: RPC_API
  • --rpc.timeout_seconds: Timeout for RPC requests (default: 20)
    • env: RPC_TIMEOUT_SECONDS
  • --rpc.max_connections: Maximum number of concurrent connections (default: 100)
    • env: RPC_MAX_CONNECTIONS
  • --rpc.pool_url: Pool URL for RPC (default: http://localhost:50051)
    • env: RPC_POOL_URL
    • Only required when running in distributed mode
  • --rpc.builder_url: Builder URL for RPC (default: http://localhost:50052)
    • env: RPC_BUILDER_URL
    • Only required when running in distributed mode

Pool Options

List of command line options for configuring the Pool.

  • --pool.port: Port to listen on for gRPC requests (default: 50051)
    • env: POOL_PORT
    • Only required when running in distributed mode
  • --pool.host: Host to listen on for gRPC requests (default: 127.0.0.1)
    • env: POOL_HOST
    • Only required when running in distributed mode
  • --pool.max_size_in_bytes: Maximum size in bytes for the pool (default: 500000000, 0.5 GB)
    • env: POOL_MAX_SIZE_IN_BYTES
  • --pool.same_sender_mempool_count: Maximum number of user operations for an unstaked sender (default: 4)
    • env: POOL_SAME_SENDER_MEMPOOL_COUNT
  • --pool.min_replacement_fee_increase_percentage: Minimum replacement fee increase percentage (default: 10)
    • env: POOL_MIN_REPLACEMENT_FEE_INCREASE_PERCENTAGE
  • --pool.blocklist_path: Path to a blocklist file (e.g blocklist.json, s3://my-bucket/blocklist.json)
    • env: POOL_BLOCKLIST_PATH
    • This path can either be a local file path or an S3 url. If using an S3 url, Make sure your machine has access to this file.
    • See here for details.
  • --pool.allowlist_path: Path to an allowlist file (e.g allowlist.json, s3://my-bucket/allowlist.json)
    • env: POOL_ALLOWLIST_PATH
    • This path can either be a local file path or an S3 url. If using an S3 url, Make sure your machine has access to this file.
    • See here for details.
  • --pool.chain_poll_interval_millis: Interval at which the pool polls an Eth node for new blocks (default: 100)
    • env: POOL_CHAIN_POLL_INTERVAL_MILLIS
  • --pool.chain_sync_max_retries: The amount of times to retry syncing the chain before giving up and waiting for the next block (default: 5)
    • env: POOL_CHAIN_SYNC_MAX_RETRIES
  • --pool.chain_history_size: Size of the chain history
    • env: POOL_CHAIN_HISTORY_SIZE
  • --pool.paymaster_tracking_enabled: Boolean field that sets whether the pool server starts with paymaster tracking enabled (default: true)
    • env: POOL_PAYMASTER_TRACKING_ENABLED
  • --pool.paymaster_cache_length: Length of the paymaster cache (default: 10_000)
    • env: POOL_PAYMASTER_CACHE_LENGTH
  • --pool.reputation_tracking_enabled: Boolean field that sets whether the pool server starts with reputation tracking enabled (default: true)
    • env: POOL_REPUTATION_TRACKING_ENABLED
  • --pool.drop_min_num_blocks: The minimum number of blocks that a UO must stay in the mempool before it can be requested to be dropped by the user (default: 10)
    • env: POOL_DROP_MIN_NUM_BLOCKS
  • --pool.gas_limit_efficiency_reject_threshold: The ratio of gas used to gas limit under which to reject UOs upon entry to the mempool (default: 0.0 disabled)
    • env: POOL_GAS_LIMIT_EFFICIENCY_REJECT_THRESHOLD

Builder Options

List of command line options for configuring the Builder.

  • --builder.port: Port to listen on for gRPC requests (default: 50052)
    • env: BUILDER_PORT
    • Only required when running in distributed mode
  • --builder.host: Host to listen on for gRPC requests (default: 127.0.0.1)
    • env: BUILDER_HOST
    • Only required when running in distributed mode
  • --builder.private_key: Private key to use for signing transactions
    • env: BUILDER_PRIVATE_KEY
    • DEPRECATED: Use --builder.private_keys instead. If both used this is added to the list.
  • --builder.private_keys: Private keys to use for signing transactions, separated by ,
    • env: BUILDER_PRIVATE_KEYS
  • --builder.aws_kms_key_ids: AWS KMS key IDs to use for signing transactions (comma-separated)
    • env: BUILDER_AWS_KMS_KEY_IDS
    • Only required if BUILDER_PRIVATE_KEY is not provided
    • Cannot use builder.private_keys and builder.aws_kms_key_ids at the same time
  • --builder.redis_uri: Redis URI to use for KMS leasing (default: "")
    • env: BUILDER_REDIS_URI
    • Only required when AWS_KMS_KEY_IDS are provided
  • --builder.redis_lock_ttl_millis: Redis lock TTL in milliseconds (default: 60000)
    • env: BUILDER_REDIS_LOCK_TTL_MILLIS
    • Only required when AWS_KMS_KEY_IDS are provided
  • --builder.max_bundle_size: Maximum number of ops to include in one bundle (default: 128)
    • env: BUILDER_MAX_BUNDLE_SIZE
  • --builder.max_blocks_to_wait_for_mine: After submitting a bundle transaction, the maximum number of blocks to wait for that transaction to mine before trying to resend with higher gas fees (default: 2)
    • env: BUILDER_MAX_BLOCKS_TO_WAIT_FOR_MINE
  • --builder.replacement_fee_percent_increase: Percentage amount to increase gas fees when retrying a transaction after it failed to mine (default: 10)
    • env: BUILDER_REPLACEMENT_FEE_PERCENT_INCREASE
  • --builder.max_cancellation_fee_increases: Maximum number of cancellation fee increases to attempt (default: 15)
    • env: BUILDER_MAX_CANCELLATION_FEE_INCREASES
  • --builder.max_replacement_underpriced_blocks: The maximum number of blocks to wait in a replacement underpriced state before issuing a cancellation transaction (default: 20)
    • env: BUILDER_MAX_REPLACEMENT_UNDERPRICED_BLOCKS
  • --builder.sender: Choice of what sender type to use for transaction submission. (default: raw, options: raw, flashbots, polygon_bloxroute)
    • env: BUILDER_SENDER
  • --builder.submit_url: Only used if builder.sender == "raw." If present, the URL of the ETH provider that will be used to send transactions. Defaults to the value of node_http.
    • env: BUILDER_SUBMIT_URL
  • --builder.use_submit_for_status: Only used if builder.sender == "raw." Use the submit url to get the status of the bundle transaction. (default: false)
    • env: BUILDER_USE_SUBMIT_FOR_STATUS
  • --builder.use_conditional_rpc: Only used if builder.sender == "raw." Use eth_sendRawTransactionConditional when submitting. (default: false)
    • env: BUILDER_USE_CONDITIONAL_RPC
  • --builder.dropped_status_unsupported: Only used if builder.sender == "raw." If set, the builder will not process a dropped status. Use this if the URL that is being used for status (node_http or submit_url) does not support pending transactions, only those that are mined. (default: false)
    • env: BUILDER_DROPPED_STATUS_UNSUPPORTED
  • --builder.flashbots_relay_builders: Only used if builder.sender == "flashbots." Additional builders to send bundles to through the Flashbots relay RPC (comma-separated). List of builders that the Flashbots RPC supports can be found here. (default: flashbots)
    • env: BUILDER_FLASHBOTS_RELAY_BUILDERS
  • --builder.flashbots_relay_auth_key: Only used/required if builder.sender == "flashbots." Authorization key to use with the flashbots relay. See here for more info. (default: None)
    • env: BUILDER_FLASHBOTS_RELAY_AUTH_KEY
  • --builder.bloxroute_auth_header: Only used/required if builder.sender == "polygon_bloxroute." If using the bloxroute transaction sender on Polygon, this is the auth header to supply with the requests. (default: None)
    • env: BUILDER_BLOXROUTE_AUTH_HEADER
  • --builder.index_offset: If running multiple builder processes, this is the index offset to assign unique indexes to each bundle sender. (default: 0)
    • env: BUILDER_INDEX_OFFSET
  • --builder.pool_url: If running in distributed mode, the URL of the pool server to use.
    • env: BUILDER_POOL_URL
    • Only required when running in distributed mode

Key management

Private keys for the bundler can be provided in a few ways. You can set the --builder.private_key flag or the BUILDER_PRIVATE_KEY environment variable within your local or deployed environment. Alternatively, you can provide the application with one or more AWS KMS ids using the --builder.aws_kms_key_ids flag or AWS_KMS_KEY_IDS environment variable. Rundler will download the key/s so long as you have kms:DescribeKey & kms:Decrypt IAM access to the KMS resource.

When using KMS keys, a Redis URL must be provided to Rundler which will take care of key leasing to make sure keys are not accessed at the same time from concurrent processes.

Example Usage

Here are some example commands to use the CLI:

# Run the Node subcommand with custom options
$ ./rundler node --network dev --disable_entry_point_v0_6 --node_http http://localhost:8545 --builder.private_keys 0x0000000000000000000000000000000000000000000000000000000000000001

# Run the RPC subcommand with custom options and enable JSON logging. The builder (localhost:50052) and pool (localhost:50051) will need to be running before this starts.
$ ./rundler rpc --network dev --node_http http://localhost:8545 --log.json --disable_entry_point_v0_6

# Run the Pool subcommand with custom options and specify a mempool config file
$ ./target/debug/rundler pool --network dev --max_simulate_handle_ops_gas 15000000 --mempool_config_path mempool.json --node_http http://localhost:8545 --disable_entry_point_v0_6