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/api/v3/masterchainInfo RPC Method

Get first and last indexed block.

Updated on
Nov 27, 2025

Parameters

This method does not accept any parameters

Returns

first
object

Information about the first indexed block

workchain
integer

The workchain identifier

shard
string

The shard identifier

seqno
integer

The block sequence number

root_hash
string

The root hash of the block

file_hash
string

The hash of the block file

global_id
integer

The global identifier of the blockchain

version
integer

The block version

after_merge
boolean

The indicator if this block was created after a merge operation

before_split
boolean

The indicator if this block was created before a split operation

after_split
boolean

The indicator if this block was created after a split operation

want_merge
boolean

The indicator if the block wants to merge

want_split
boolean

The indicator if the block wants to split

key_block
boolean

The indicator if this is a key block

vert_seqno_incr
boolean

The indicator if vertical sequence number was incremented

flags
integer

The block flags indicating various properties

gen_utime
string

The block generation UTC timestamp

start_lt
string

The start logical time of the block

end_lt
string

The end logical time of the block

validator_list_hash_short
integer

The short hash of the validator list

gen_catchain_seqno
integer

The generation catchain sequence number

min_ref_mc_seqno
integer

The minimum referenced masterchain sequence number

prev_key_block_seqno
integer

The sequence number of the previous key block

vert_seqno
integer

The vertical sequence number

master_ref_seqno
integer

The sequence number of the referenced masterchain block

rand_seed
string

The random seed used in block generation

created_by
string

The address of the validator that created this block

tx_count
integer

The number of transactions in the block

masterchain_block_ref
object

The reference to the masterchain block

workchain
integer

The workchain identifier of the masterchain block

shard
string

The shard identifier of the masterchain block

seqno
integer

The sequence number of the masterchain block

prev_blocks
array

The array of previous block references

workchain
integer

The workchain identifier of the previous block

shard
string

The shard identifier of the previous block

seqno
integer

The sequence number of the previous block

last
object

Information about the last indexed block

workchain
integer

The workchain identifier

shard
string

The shard identifier

seqno
integer

The block sequence number

root_hash
string

The root hash of the block

file_hash
string

The hash of the block file

global_id
integer

The global identifier of the blockchain

version
integer

The block version

after_merge
boolean

The indicator if this block was created after a merge operation

before_split
boolean

The indicator if this block was created before a split operation

after_split
boolean

The indicator if this block was created after a split operation

want_merge
boolean

The indicator if the block wants to merge

want_split
boolean

The indicator if the block wants to split

key_block
boolean

The indicator if this is a key block

vert_seqno_incr
boolean

The indicator if vertical sequence number was incremented

flags
integer

The block flags indicating various properties

gen_utime
string

The block generation UTC timestamp

start_lt
string

The start logical time of the block

end_lt
string

The end logical time of the block

validator_list_hash_short
integer

The short hash of the validator list

gen_catchain_seqno
integer

The generation catchain sequence number

min_ref_mc_seqno
integer

The minimum referenced masterchain sequence number

prev_key_block_seqno
integer

The sequence number of the previous key block

vert_seqno
integer

The vertical sequence number

master_ref_seqno
integer

The sequence number of the referenced masterchain block

rand_seed
string

The random seed used in block generation

created_by
string

The address of the validator that created this block

tx_count
integer

The number of transactions in the block

masterchain_block_ref
object

The reference to the masterchain block

workchain
integer

The workchain identifier of the masterchain block

shard
string

The shard identifier of the masterchain block

seqno
integer

The sequence number of the masterchain block

prev_blocks
array

The array of previous block references

workchain
integer

The workchain identifier of the previous block

shard
string

The shard identifier of the previous block

seqno
integer

The sequence number of the previous block

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