The chain_plugin is a core plugin required to process and aggregate chain data on an EOSIO-Taurus node.
The EOSIO-Taurus blockchain persists the chain state as snapshots.
# config.ini
plugin = eosio::chain_plugin
[options]# command-line
nodeos ... --plugin eosio::chain_plugin [operations] [options]These can only be specified from the nodeos command-line:
Command Line Options for eosio::chain_plugin:
--genesis-json arg File to read Genesis State from
--genesis-timestamp arg override the initial timestamp in the
Genesis State file
--print-genesis-json extract genesis_state from blocks.log
as JSON, print to console, and exit
--extract-genesis-json arg extract genesis_state from blocks.log
as JSON, write into specified file, and
exit
--print-build-info print build environment information to
console as JSON and exit
--extract-build-info arg extract build environment information
as JSON, write into specified file, and
exit
--fix-reversible-blocks recovers reversible block database if
that database is in a bad state
--force-all-checks do not skip any validation checks while
replaying blocks (useful for replaying
blocks from untrusted source)
--disable-replay-opts disable optimizations that specifically
target replay
--replay-blockchain clear chain state database and replay
all blocks
--hard-replay-blockchain clear chain state database, recover as
many blocks as possible from the block
log, and then replay those blocks
--delete-all-blocks clear chain state database and block
log
--truncate-at-block arg (=0) stop hard replay / block log recovery
at this block number (if set to
non-zero number)
--terminate-at-block arg (=0) terminate after reaching this block
number (if set to a non-zero number)
--import-reversible-blocks arg replace reversible block database with
blocks imported from specified file and
then exit
--export-reversible-blocks arg export reversible block database in
portable format into specified file and
then exit
--snapshot arg File to read Snapshot State fromThese can be specified from both the nodeos command-line or the config.ini file:
Config Options for eosio::chain_plugin:
--blocks-dir arg (="blocks") the location of the blocks directory
(absolute path or relative to
application data dir)
--blocks-log-stride arg (=4294967295) split the block log file when the head
block number is the multiple of the
stride
When the stride is reached, the current
block log and index will be renamed
'<blocks-retained-dir>/blocks-<start
num>-<end num>.log/index'
and a new current block log and index
will be created with the most recent
block. All files following
this format will be used to construct
an extended block log.
--max-retained-block-files arg (=10) the maximum number of blocks files to
retain so that the blocks in those
files can be queried.
When the number is reached, the oldest
block file would be moved to archive
dir or deleted if the archive dir is
empty.
The retained block log files should not
be manipulated by users.
--blocks-retained-dir arg (="") the location of the blocks retained
directory (absolute path or relative to
blocks dir).
If the value is empty, it is set to the
value of blocks dir.
--blocks-archive-dir arg (="archive") the location of the blocks archive
directory (absolute path or relative to
blocks dir).
If the value is empty, blocks files
beyond the retained limit will be
deleted.
All files in the archive directory are
completely under user's control, i.e.
they won't be accessed by nodeos
anymore.
--fix-irreversible-blocks arg (=1) When the existing block log is
inconsistent with the index, allows
fixing the block log and index files
automatically - that is, it will take
the highest indexed block if it is
valid; otherwise it will repair the
block log and reconstruct the index.
--protocol-features-dir arg (="protocol_features")
the location of the protocol_features
directory (absolute path or relative to
application config dir)
--checkpoint arg Pairs of [BLOCK_NUM,BLOCK_ID] that
should be enforced as checkpoints.
--wasm-runtime runtime (=eos-vm-jit) Override default WASM runtime (
"eos-vm-jit", "eos-vm")
"eos-vm-jit" : A WebAssembly runtime
that compiles WebAssembly code to
native x86 code prior to execution.
"eos-vm" : A WebAssembly interpreter.
--abi-serializer-max-time-ms arg (=15)
Override default maximum ABI
serialization time allowed in ms
--chain-state-db-size-mb arg (=1024) Maximum size (in MiB) of the chain
state database
--chain-state-db-guard-size-mb arg (=128)
Safely shut down node when free space
remaining in the chain state database
drops below this size (in MiB).
--backing-store arg (=chainbase) The storage for state, chainbase or
rocksdb
--persistent-storage-num-threads arg (=1)
Number of rocksdb threads for flush and
compaction
--persistent-storage-max-num-files arg (=-1)
Max number of rocksdb files to keep
open. -1 = unlimited.
--persistent-storage-write-buffer-size-mb arg (=128)
Size of a single rocksdb memtable (in
MiB)
--persistent-storage-bytes-per-sync arg (=1048576)
Rocksdb write rate of flushes and
compactions.
--persistent-storage-mbytes-snapshot-batch arg (=50)
Rocksdb batch size threshold before
writing read in snapshot data to
database.
--reversible-blocks-db-size-mb arg (=340)
Maximum size (in MiB) of the reversible
blocks database
--reversible-blocks-db-guard-size-mb arg (=2)
Safely shut down node when free space
remaining in the reverseible blocks
database drops below this size (in
MiB).
--signature-cpu-billable-pct arg (=50)
Percentage of actual signature recovery
cpu to bill. Whole number percentages,
e.g. 50 for 50%
--chain-threads arg (=2) Number of worker threads in controller
thread pool
--contracts-console print contract's output to console
--deep-mind print deeper information about chain
operations
--telemetry-url arg Send Zipkin spans to url. e.g.
http://127.0.0.1:9411/api/v2/spans
--telemetry-service-name arg (=nodeos)
Zipkin localEndpoint.serviceName sent
with each span
--telemetry-timeout-us arg (=200000) Timeout for sending Zipkin span.
--actor-whitelist arg Account added to actor whitelist (may
specify multiple times)
--actor-blacklist arg Account added to actor blacklist (may
specify multiple times)
--contract-whitelist arg Contract account added to contract
whitelist (may specify multiple times)
--contract-blacklist arg Contract account added to contract
blacklist (may specify multiple times)
--action-blacklist arg Action (in the form code::action) added
to action blacklist (may specify
multiple times)
--key-blacklist arg Public key added to blacklist of keys
that should not be included in
authorities (may specify multiple
times)
--sender-bypass-whiteblacklist arg Deferred transactions sent by accounts
in this list do not have any of the
subjective whitelist/blacklist checks
applied to them (may specify multiple
times)
--read-mode arg (=speculative) Database read mode ("speculative",
"head", "read-only", "irreversible").
In "speculative" mode: database
contains state changes by transactions
in the blockchain up to the head block
as well as some transactions not yet
included in the blockchain.
In "head" mode: database contains state
changes by only transactions in the
blockchain up to the head block;
transactions received by the node are
relayed if valid.
In "read-only" mode: (DEPRECATED: see
p2p-accept-transactions &
api-accept-transactions) database
contains state changes by only
transactions in the blockchain up to
the head block; transactions received
via the P2P network are not relayed and
transactions cannot be pushed via the
chain API.
In "irreversible" mode: database
contains state changes by only
transactions in the blockchain up to
the last irreversible block;
transactions received via the P2P
network are not relayed and
transactions cannot be pushed via the
chain API.
--api-accept-transactions arg (=1) Allow API transactions to be evaluated
and relayed if valid.
--validation-mode arg (=full) Chain validation mode ("full" or
"light").
In "full" mode all incoming blocks will
be fully validated.
In "light" mode all incoming blocks
headers will be fully validated;
transactions in those validated blocks
will be trusted
--disable-ram-billing-notify-checks Disable the check which subjectively
fails a transaction if a contract bills
more RAM to another account within the
context of a notification handler (i.e.
when the receiver is not the code of
the action).
--maximum-variable-signature-length arg (=16384)
Subjectively limit the maximum length
of variable components in a variable
legnth signature to this size in bytes
--trusted-producer arg Indicate a producer whose blocks
headers signed by it will be fully
validated, but transactions in those
validated blocks will be trusted.
--database-map-mode arg (=mapped) Database map mode ("mapped", "heap", or
"locked").
In "mapped" mode database is memory
mapped as a file.
In "heap" mode database is preloaded in
to swappable memory and will use huge
pages if available.
In "locked" mode database is preloaded,
locked in to memory, and will use huge
pages if available.
--enable-account-queries arg (=0) enable queries to find accounts by
various metadata.
--max-nonprivileged-inline-action-size arg (=4096)
maximum allowed size (in bytes) of an
inline action for a nonprivileged
accountNone