Daemon HTTP RPC API

The daemon HTTP RPC is a HTTP server which provides additional information regarding network and daemon connections.

Installation

npm i kryptokrona-rpc

Interacting with the API

API endpoint example

http://localhost:11898

Configuration and Instantiation

To start the Daemon JSON RPC API server at http://localhost:11898, run:

kryptokrona --rpc-bind-port=11898

To make the server accessible from another computer, use the --rpc-bind-ip 0.0.0.0 switch.

kryptokrona --rpc-bind-ip=0.0.0.0 --rpc-bind-port=11898

To enable block explorer API access (like for getblocks, gettransactionpool, etc.), use the --enable-blockexplorer switch.

kryptokrona --enable-blockexplorer

The above given switches can be combined to achieve remote access with block explorer methods as shown below.

kryptokrona --enable-blockexplorer --rpc-bind-ip=0.0.0.0 --rpc-bind-port=11898

This would make the RPC server accessible at

http://<your ip address>:11898

and, locally at

http://localhost:11898

To make a HTTP RPC request to your Daemon RPC you should use a GET request that looks like this:

http://<service address>:<service port>

Parameter	Description
<service address>	IP of Daemon RPC, if it is located on local machine it is either 127.0.0.1 or localhost
<service port>	Daemon RPC port, by default it is bound to 11898 port, but it can be manually bound to any port you want

const kryptokrona = require('kryptokrona-rpc').kryptokrona

const daemon = new kryptokrona({
  host: '0.0.0.0', // ip address or hostname of the kryptokrona host
  port: 11898, // what port is the RPC server running on
  timeout: 2000, // request timeout
  ssl: false // whether we need to connect using SSL/TLS
})

getheight

getheight() returns the height of the daemon and the network

No Input.

Output

Argument	Description	Format
height	Current daemon height	int
network_height	Current Network height	int
status	Status of request	string

curl http://localhost:11898/getheight

daemon.getHeight().then((result) => {
  // do something
}).catch((error) => {
  // do something
})

Expected Output

{
    "height":614214,
    "network_height":614218,
    "status":"OK"
}

getinfo

getinfo() returns information related to the network and daemon connection

No Input.

Output

Argument	Description	Format
alt_blocks_count	the number of blocks on alternative (split) chains since the start of the daemon	int
difficulty	difficulty of the top block	int
grey_peerlist_size	list of peers that were alive but not any more (offline)	int
hashrate	estimated network hashrate for given block (top block if general chain info) = difficulty / 30s (block time target)	int
height	daemon height. index of the last locally stored block. different from network_height when syncing the network, or when just found a block.	int
incoming_connections_count	Number of peers connected to and pulling from this daemon node.	int
last_known_block_index	?	int
major_version	blockchain major version. such as hash algorithm change	int
minor_version	blockchain minor version. for example, difficulty algo adjustment. rarely used.	int
network_height	blockchain length reported by peers. the longest value given by any connected peer.	int
outgoing_connections_count	number of outgoing connections from the daemon	int
start_time	the time when this daemon was started. epoch time in seconds	int
status	Status of request	string
supported_height	the height of the blockchain for supported fork. if forked after this block height, this version does not support it	int
synced	sync status. does the height of this node match the height of the network?	bool
testnet	whether the daemon is on testnet or not	bool
tx_count	Total number of non-coinbase transaction in the chain.	int
tx_pool_size	Number of transactions that have been broadcast but not included in a block.	int
upgrade_heights	pre-determined fork heights. blockchain heights where it forked.	array
version	version of the daemon software	string
white_peerlist_size	list of online peers	int

curl http://localhost:11898/getinfo

daemon.getInfo().then((result) => {
  // do something
}).catch((error) => {
  // do something
})

Expected Output

{
    "alt_blocks_count":1,
    "difficulty":250340644,
    "grey_peerlist_size":493,
    "hashrate":8344688,
    "height":614321,
    "incoming_connections_count":28,
    "last_known_block_index":614319,
    "major_version":4,
    "minor_version":0,
    "network_height":614321,
    "outgoing_connections_count":8,
    "start_time":1531403048,
    "status":"OK",
    "supported_height":620000,
    "synced":true,
    "testnet":false,
    "tx_count":720189,
    "tx_pool_size":0,
    "upgrade_heights":[
        187000,
        350000,
        440000,
        620000,
        .....
    ],
    "version":"0.6.3",
    "white_peerlist_size":43
}

gettransactions

gettransactions() method returns list of missed transactions. "Missed transactions" are invalid transactions in the sense that they do not exist in the blockchain. Input should include the transaction hashes to check. Try figuring that out. This method is likely to go away in near future.

No Input

Output

Argument	Description	Format
missed_tx	array of missed transactions	array
status	Status of request	string
txs_as_hex	array of hex values of missed transactions	array

curl http://localhost:11898/gettransactions

daemon.getTransactions({
  hashes: [
    '549828e75151982b0e51b27e8f53b26ebc174f0ef78063984c8952b13e2a3564',
    '549828e75151982b0e51b27e8f53b26ebc174f0ef78063984c8952b13e2a3563'
  ]
}).then((result) => {
  // do something
}).catch((error) => {
  // do something
})

Expected Output

{
    "missed_tx":[],
    "status":"OK",
    "txs_as_hex":[]
}

getpeers

getpeers() method returns the list of peers connected to the daemon

No Input.

Output

Argument	Description	Format
peers	array of peers (peer_ip:peer_port)	array
status	Status of request	string

curl http://localhost:11898/getpeers

daemon.getPeers().then((result) => {
  // do something
}).catch((error) => {
  // do something
})

Expected Output

{
    "peers":[
        "192.222.157.172:11897",
        "94.23.49.75:11897",
        "112.78.10.43:11897",
        .....
    ],
    "status":"OK"
}

feeinfo

feeinfo() method returns information about the fee set for the remote node.

No Input.

Output

Argument	Description	Format
address	address to which the fee is paid	string
amount	fee amount	int
status	Status of fees for the node	string

curl http://localhost:11898/feeinfo

daemon.feeInfo().then((result) => {
  // do something
}).catch((error) => {
  // do something
})

Expected Output

{
    "address":"",
    "amount":0,
    "status":"Node's fee address is not set"
}

License

The content in this document was originally written by the Bytecoin (BCN) Developers. It is licensed under the CC BY SA 3.0 license. The source material can be found at the Bytecoin Wiki.

Also of note, kryptokrona developers have altered and adapted the content to suit our implementation of the API. This was done independently of the Bytecoin development team. They neither endorse or acknowledge our changes. Feel free to adopt or change our content as per the CC BY SA 3.0 license requirements.