Database API

The database API is available from the full node via web-sockets.
Objects
get_objects
Get the objects corresponding to the provided IDs.
If any of the provided IDs does not map to an object, a null variant is returned in its position.
fc::variants graphene::app::database_api::get_objects(
    const vector<object_id_type> &ids, 
    optional<bool> subscribe = optional<bool>())const
Parameters
Return
ids: IDs of the objects to retrieve
subscribe: true to subscribe to the queried objects; false to not subscribe; null to subscribe or not subscribe according to current auto-subscription setting (see set_auto_subscription)
The objects retrieved, in the order they are mentioned in ids.
Subscriptions
set_subscribe_callback
Register a callback handle which then can be used to subscribe to object database changes.
Note: auto-subscription is enabled by default and can be disabled with set_auto_subscription 
void graphene::app::database_api::set_subscribe_callback(
    std::function<void(const variant&)> cb, 
    bool notify_remove_create, )
Parameters
cb: The callback handle to register
notify_remove_create: Whether subscribe to universal object creation and removal events. If this is set to true, the API server will notify all newly created objects and ID of all newly removed objects to the client, no matter whether client subscribed to the objects. By default, API servers don’t allow subscribing to universal events, which can be changed on server startup.
set_pending_transaction_callback
Register a callback handle which will get notified when a transaction is pushed to database.
Note: A transaction can be pushed to the database and be popped from the database several times while processing, before and after,, included in a block. Every time a push is done, the client will be notified.
void graphene::app::database_api::set_pending_transaction_callback(
    std::function<void(const variant &signed_transaction_object)> cb)
Parameters
cb: The callback handle to register
set_block_applied_callback
Register a callback handle which will get notified when a block is pushed to database.
void graphene::app::database_api::set_block_applied_callback(
    std::function<void(const variant &block_id)> cb)
Parameters
cb: The callback handle to register
cancel_all_subscriptions
Stop receiving any notifications.
This unsubscribes from all subscribed markets and objects.
void graphene::app::database_api::cancel_all_subscriptions()
Blocks and transactions
get_block_header
Retrieve a block header.
optional<block_header> graphene::app::database_api::get_block_header(
    uint32_t block_num)const
Parameters
Return
block_num: Height of the block whose header should be returned
The header of the referenced block, or null if no matching block was foun
get_block
Retrieve a full, signed block.
optional<signed_block> graphene::app::database_api::get_block(
    uint32_t block_num)const
Parameters
Return
block_num: Height of the block to be returned
The referenced block, or null if no matching block was found.
get_transaction
Fetch an individual transaction.
processed_transaction graphene::app::database_api::get_transaction(
    uint32_t block_num, uint32_t trx_in_block)const
Parameters
Return
block_num: height of the block to fetch
trx_in_block: the index (sequence number) of the transaction in the block, starts from 0
The transaction at the given position.
get_recent_transaction_by_id
optional<signed_transaction> graphene::app::database_api::get_recent_transaction_by_id(
    const transaction_id_type &txid)const
Parameters
Return
txid: hash of the transaction
The corresponding transaction if found, or null if not found.
If the transaction has not expired, this method will return the transaction for the given ID or it will return NULL if it is not known. Just because it is not known does not mean it wasn’t included in the blockchain.
Globals
get_chain_properties
Retrieve the graphene::chain::chain_property_object associated with the chain.
chain_property_object graphene::app::database_api::get_chain_properties()const
get_global_properties
Retrieve the current graphene::chain::global_property_object.
global_property_object graphene::app::database_api::get_global_properties()const
get_config
Retrieve compile-time constants.
fc::variant_object graphene::app::database_api::get_config()const
get_chain_id
Get the chain ID.
chain_id_type graphene::app::database_api::get_chain_id()cons
get_dynamic_global_properties
Retrieve the current graphene::chain::dynamic_global_property_object.
dynamic_global_property_object graphene::app::database_api::get_dynamic_global_properties()const
Keys
get_key_references
Get all accounts that refer to the specified public keys in their owner authority, active authorities or memo key.
vector<flat_set<account_id_type>> graphene::app::database_api::get_key_references(
    vector<public_key_type> keys)const
Parameters
Return
keys: a list of public keys to query
ID of all accounts that refer to the specified keys.
Accounts
get_accounts
Get a list of accounts by names or IDs.
This function has semantics identical toget_objects​
vector<optional<account_object>> graphene::app::database_api::get_accounts(
    const vector<std::string> &account_names_or_ids, 
    optional<bool> subscribe = optional<bool>())const
Parameters
Return
account_names_or_ids: names or IDs of the accounts to retrieve
subscribe: true to subscribe to the queried account objects; false to not subscribe; null to subscribe or not subscribe according to current auto-subscription setting (see set_auto_subscription)
The accounts corresponding to the provided names or IDs.
get_full_accounts
Fetch all objects relevant to the specified accounts and optionally subscribe to updates.
This function fetches all relevant objects for the given accounts, and subscribes to updates to the given accounts. If any of the strings innames_or_ids cannot be tied to an account, that input will be ignored. All other accounts will be retrieved and subscribed.
std::map<string, full_account> graphene::app::database_api::get_full_accounts(
    const vector<string> &names_or_ids, 
    optional<bool> subscribe = optional<bool>())
Parameters
Return
names_or_ids: Each item must be the name or ID of an account to retrieve
subscribe: true to subscribe to the queried full account objects; false to not subscribe; null to subscribe or not subscribe according to current auto-subscription setting (see set_auto_subscription)
Map of string from names_or_ids to the corresponding account.
get_account_by_name
Get info of an account by name.
optional<account_object> graphene::app::database_api::get_account_by_name(
    string name)const
Parameters
Return
name: Name of the account to retrieve
The account holding the provided name.
get_account_references
Get all accounts that refer to the specified account in their owner or active authorities.
vector<account_id_type> graphene::app::database_api::get_account_references(
    const std::string account_name_or_id)const
Parameters
Return
account_name_or_id: Account name or ID to query
All accounts that refer to the specified account in their owner or active authorities
lookup_account_names
Get a list of accounts by name.
This function has semantics identical to get_objects, but doesn’t subscribe
vector<optional<account_object>> graphene::app::database_api::lookup_account_names(
    const vector<string> &account_names)const
Parameters
Return
account_names: Names of the accounts to retrieve
The accounts holding the provided names.
lookup_accounts
Get names and IDs for registered accounts.
Note: In addition to the common auto-subscription rules, this API will subscribe to the returned account only if limit is 1.
map<string, account_id_type> graphene::app::database_api::lookup_accounts(
    const string &lower_bound_name, 
    uint32_t limit, 
    optional<bool> subscribe = optional<bool>())const
Parameters
Return
lower_bound_name: Lower bound of the first name to return
limit: Maximum number of results to return must not exceed 1000
subscribe: true to subscribe to the queried account objects; false to not subscribe; null to subscribe or not subscribe according to current auto-subscription setting (see set_auto_subscription).
Map of account names to corresponding IDs.
get_account_count
Get the total number of accounts registered with the blockchain.
uint64_t graphene::app::database_api::get_account_count()const
Balances
get_account_balances
Get an account’s balances in various assets.
vector<asset> graphene::app::database_api::get_account_balances(
    const std::string &account_name_or_id, 
    const flat_set<asset_id_type> &assets)const
Parameters
Return
account_name_or_id: name or ID of the account to get balances for.
assets: IDs of the assets to get balances of; if empty, get all assets account has a balance in.
Balances of the account.
get_named_account_balances
Semantically equivalent to get_account_balances.
vector<asset> graphene::app::database_api::get_named_account_balances(
    const std::string &name, 
    const flat_set<asset_id_type> &assets)const
Parameters
Return
account_name_or_id: name or ID of the account to get balances for.
assets: IDs of the assets to get balances of; if empty, get all assets account has a balance in.
Balances of the account.
get_balance_objects
vector<balance_object> graphene::app::database_api::get_balance_objects(
    const vector<address> &addrs)const
Parameters
Return
addrs: a list of addresses
All unclaimed balance objects for the addresses.
get_vested_balances
Calculate how much assets in the given balance objects are able to be claimed at current head block time.
vector<asset> graphene::app::database_api::get_vested_balances(
    const vector<balance_id_type> &objs)const
Parameters
Return
objs: a list of balance object IDs
A list indicating how much asset in each balance object is available to be claimed.
get_vesting_balances
Return all vesting balance objects owned by an account.
vector<vesting_balance_object> graphene::app::database_api::get_vesting_balances(
    const std::string account_name_or_id)const
Parameters
Return
account_name_or_id: name or ID of an account
All vesting balance objects owned by the account.
Assets
get_assets
Get a list of assets by symbol names or IDs.
Semantically equivalent to get_objects.
vector<optional<extended_asset_object>> graphene::app::database_api::get_assets(
    const vector<std::string> &asset_symbols_or_ids, 
    optional<bool> subscribe = optional<bool>())const
Parameters
Return
asset_symbols_or_ids: symbol names or IDs of the assets to retrieve
subscribe: true to subscribe to the queried asset objects; false to not subscribe; null to subscribe or not subscribe according to current auto-subscription setting (see set_auto_subscription)
The assets corresponding to the provided symbol names or IDs.
list_assets
Get assets alphabetically by symbol name.
vector<extended_asset_object> graphene::app::database_api::list_assets(
    const string &lower_bound_symbol, 
    uint32_t limit)const
Parameters
Return
lower_bound_symbol: Lower bound of symbol names to retrieve
limit: Maximum number of assets to fetch (must not exceed 101)
The assets found.
lookup_asset_symbols
Get a list of assets by symbol names or IDs.
Semantically equivalent to get_objects, but doesn’t subscribe.
vector<optional<extended_asset_object>> graphene::app::database_api::lookup_asset_symbols(
    const vector<string> &symbols_or_ids)const
Parameters
Return
symbols_or_ids: symbol names or IDs of the assets to retrieve
The assets corresponding to the provided symbols or IDs
Markets / Feeds
get_order_book
Returns the order book for the market base
order_book graphene::app::database_api::get_order_book(
    const string &base, 
    const string &quote, 
    unsigned limit = 50)const
Parameters
Return
base: symbol name or ID of the base asset
quote: symbol name or ID of the quote asset
limit: depth of the order book to retrieve, for bids and asks each, capped at 50
Order book of the market.
get_limit_orders
Get limit orders in a given market.
vector<limit_order_object> graphene::app::database_api::get_limit_orders(
    std::string a, 
    std::string b, 
    uint32_t limit)const
Parameters
Return
a: symbol or ID of asset being sold
b: symbol or ID of asset being purchased
limit: Maximum number of orders to retrieve
The limit orders, ordered from least price to greatest.
get_call_orders
Get call orders (aka margin positions) for a given asset.
vector<call_order_object> graphene::app::database_api::get_call_orders(
    const std::string &a, 
    uint32_t limit)const
Parameters
Return
a: symbol name or ID of the debt asset
limit: Maximum number of orders to retrieve
The call orders, ordered from earliest to be called to latest
get_settle_orders
Get forced settlement orders in a given asset.
vector<force_settlement_object> graphene::app::database_api::get_settle_orders(
    const std::string &a, 
    uint32_t limit)const
Parameters
Return
a: Symbol or ID of asset being settled
limit: Maximum number of orders to retrieve
The settle orders, ordered from earliest settlement date to latest.
get_margin_positions
Get all open margin positions of a given account.
Similar to get_call_orders_by_account, but without pagination.
vector<call_order_object> graphene::app::database_api::get_margin_positions(
    const std::string account_name_or_id)const
Parameters
Return
account_name_or_id: name or ID of an account
All open margin positions of the account.
subscribe_to_market
Request notification when the active orders in the market between two assets changes.
Callback will be passed a variant containing a vector<pair<operation, operation_result>>. 
The vector will contain, in order, the operations which changed the market, and their results
void graphene::app::database_api::subscribe_to_market(std::function<void(
    const variant&)> callback, 
    const std::string &a, 
    const std::string &b, )
Parameters
callback: Callback method which is called when the market changes
a: symbol name or ID of the first asset
b: symbol name or ID of the second asset
unsubscribe_from_market
Unsubscribe from updates to a given market.
void graphene::app::database_api::unsubscribe_from_market(
    const std::string &a, 
    const std::string &b)
Parameters
a: symbol name or ID of the first asset
b: symbol name or ID of the second asset
get_ticker
Returns the ticker for the market assetA:assetB.
market_ticker graphene::app::database_api::get_ticker(
    const string &base, 
    const string &quote)const
Parameters
Return
base: symbol name or ID of the base asset
quote: symbol name or ID of the quote asset
The market ticker for the past 24 hours.
get_24_volume
Returns the 24 hour volume for the market assetA:assetB.
market_volume graphene::app::database_api::get_24_volume(
    const string &base, 
    const string &quote)const
Parameters
Return
base: symbol name or ID of the base asset
quote: symbol name or ID of the quote asset
The market volume over the past 24 hours.
get_trade_history
Returns recent trades for the market base:quote, ordered by time, most recent first. 
Note: Currently, timezone offsets are not supported. The time must be UTC.
The range is [stop, start). In case  there are more than 100 trades occurring in the same second, this API only returns the first 100 records; use get_trade_history_by_sequence to query for the rest.
vector<market_trade> graphene::app::database_api::get_trade_history(
    const string &base, 
    const string &quote, 
    fc::time_point_sec start, 
    fc::time_point_sec stop, 
    unsigned limit = 100)const
Parameters
Return
base: symbol or ID of the base asset
quote: symbol or ID of the quote asset
start: Start time as a UNIX timestamp, the latest trade to retrieve
stop: Stop time as a UNIX timestamp, the earliest trade to retrieve
limit: Number of transactions to retrieve, capped at 100.
Recent transactions in the market
Witnesses
get_witnesses
Get a list of witnesses by ID.
Semantically equivalent to get_objects, but doesn’t subscribe.
vector<optional<witness_object>> graphene::app::database_api::get_witnesses(
    const vector<witness_id_type> &witness_ids)const
Parameters
Return
witness_ids: IDs of the witnesses to retrieve
The witnesses corresponding to the provided IDs.
get_witness_by_account
Get the witness owned by a given account.
fc::optional<witness_object> graphene::app::database_api::get_witness_by_account(
    const std::string account_name_or_id)const
Parameters
Return
account_name_or_id: The name or ID of the account whose witness should be retrieved
The witness object, or null if the account does not have a witness.
lookup_witness_accounts
Get names and IDs for registered witnesses.
map<string, witness_id_type> graphene::app::database_api::lookup_witness_accounts(
    const string &lower_bound_name, uint32_t limit)const
Parameters
Return
lower_bound_name: Lower bound of the first name to return
limit: Maximum number of results to return must not exceed 1000
Map of witness names to corresponding IDs.
get_witness_count
Get the total number of witnesses registered with the blockchain.
uint64_t graphene::app::database_api::get_witness_count()const
Committee members
get_committee_members
Get a list of committee_members by ID.
Semantically equivalent to get_objects, but doesn’t subscribe.
vector<optional<committee_member_object>> graphene::app::database_api::get_committee_members(
    const vector<committee_member_id_type> &committee_member_ids)const
Parameters
Return
committee_member_ids: IDs of the committee_members to retrieve
The committee_members corresponding to the provided IDs.
get_committee_member_by_account
Get the committee_member owned by a given account.
fc::optional<committee_member_object> graphene::app::database_api::get_committee_member_by_account(
    const string account_name_or_id)const
Parameters
Return
account_name_or_id: The name or ID of the account whose committee_member should be retrieved
The committee_member object, or null if the account does not have a committee_member.
lookup_committee_member_accounts
Get names and IDs for registered committee_members.
map<string, committee_member_id_type> graphene::app::database_api::lookup_committee_member_accounts(
    const string &lower_bound_name, 
    uint32_t limit)const
Parameters
Return
lower_bound_name: Lower bound of the first name to return
limit: Maximum number of results to return must not exceed 1000
Map of committee_member names to corresponding IDs
Workers
get_workers_by_account
Get the workers owned by a given account.
vector<optional<worker_object>> graphene::app::database_api::get_workers_by_account(
    const std::string account_name_or_id)const
Parameters
Return
account_name_or_id: The name or ID of the account whose worker should be retrieved
A list of worker objects owned by the account.
Votes
lookup_vote_ids
Given a set of votes, returns the objects they are voting for.
This will be a mixture of committee_member_objects, witness_objects, and worker_objects
vector<variant> graphene::app::database_api::lookup_vote_ids(
    const vector<vote_id_type> &votes)const
Parameters
Return
votes: a list of vote IDs
The referenced objects
The results will be in the same order as the votes. Null will be returned for any vote IDs that are not found.
Authority / Validation
get_transaction_hex
Get a hexdump of the serialized binary form of a transaction.
std::string graphene::app::database_api::get_transaction_hex(
    const signed_transaction &trx)const
Parameters
Return
trx: a transaction to get hexdump from
The hexdump of the transaction.
get_required_signatures
This API will take a partially signed transaction and a set of public keys that the owner has the ability to sign for and return the minimal subset of public keys that should add signatures to the transaction.
set<public_key_type> graphene::app::database_api::get_required_signatures(
    const signed_transaction &trx, 
    const flat_set<public_key_type> &available_keys)const
Parameters
Return
trx: the transaction to be signed
available_keys: a set of public keys
A subset of available_keys that could sign for the given transaction.
get_potential_signatures