Management APIs

Beside the official DApp APIs interface go-ethereum has support for additional management APIs. Similar to the DApp APIs, these are also provided using JSON-RPC and follow exactly the same conventions. Geth comes with a console client which has support for all additional APIs described here.

Enabling the management APIs

To offer these APIs over the Geth RPC endpoints, please specify them with the --${interface}api command line argument (where ${interface} can be rpc for the HTTP endpoint, ws for the WebSocket endpoint and ipc for the unix socket (Unix) or named pipe (Windows) endpoint).

For example: geth --ipcapi admin,eth,miner --rpcapi eth,web3 --rpc

Enables the admin, official DApp and miner API over the IPC interface
Enables the official DApp and web3 API over the HTTP interface

The HTTP RPC interface must be explicitly enabled using the --rpc flag.

Please note, offering an API over the HTTP (rpc) or WebSocket (ws) interfaces will give everyone access to the APIs who can access this interface (DApps, browser tabs, etc). Be careful which APIs you enable. By default Geth enables all APIs over the IPC (ipc) interface and only the db, eth, net and web3 APIs over the HTTP and WebSocket interfaces.

To determine which APIs an interface provides, the modules JSON-RPC method can be invoked. For example over an ipc interface on unix systems:

echo '{"jsonrpc":"2.0","method":"modules","params":[],"id":1}' | nc -U $datadir/geth.ipc

will give all enabled modules including the version number:

{  
   "id":1,
   "jsonrpc":"2.0",
   "result":{  
      "admin":"1.0",
      "db":"1.0",
      "debug":"1.0",
      "eth":"1.0",
      "miner":"1.0",
      "net":"1.0",
      "personal":"1.0",
      "shh":"1.0",
      "txpool":"1.0",
      "web3":"1.0"
   }
}

Consuming the management APIs

These additional APIs follow the same conventions as the official DApp APIs. Web3 can be extended and used to consume these additional APIs.

The different functions are split into multiple smaller logically grouped APIs. Examples are given for the JavaScript console but can easily be converted to an RPC request.

2 examples:

Console: miner.start()
IPC: echo '{"jsonrpc":"2.0","method":"miner_start","params":[],"id":1}' | nc -U $datadir/geth.ipc
HTTP: curl -X POST --data '{"jsonrpc":"2.0","method":"miner_start","params":[],"id":74}' localhost:8545

With the number of THREADS as an arguments:

Console: miner.start(4)
IPC: echo '{"jsonrpc":"2.0","method":"miner_start","params":[4],"id":1}' | nc -U $datadir/geth.ipc
HTTP: curl -X POST --data '{"jsonrpc":"2.0","method":"miner_start","params":[4],"id":74}' localhost:8545

List of management APIs

Beside the officially exposed DApp API namespaces (eth, shh, web3), Geth provides the following extra management API namespaces:

admin: Geth node management
debug: Geth node debugging
miner: Miner and DAG management
personal: Account management
txpool: Transaction pool inspection

admin	debug	miner	personal	txpool
addPeer	dumpBlock	start	listAccounts	status
[peers] (#admin_peers)	[getBlockRlp] (#debug_getBlockRlp)	stop	newAccount
importChain	printBlock	hashrate	unlockAccount
exportChain	processBlock	setExtra
verbosity	seedHash	setGasPrice
setSolc	setHead	startAutoDAG
startRPC		stopAutoDAG
stopRPC		makeDAG
startWS
stopWS

admin_addPeer

Add peer to node

Parameters

Url, peer enode url

Return

boolean indicating if the peer was added

Example

admin.addPeer("enode://4d19a2d...167fa41@XXX.XXX.XXX.XXX:30303")

admin_peers

This property will show all connected peers.

Example

admin.peers

admin_importChain

Import an exported chain from file into node. This only works if no chain already exists: it does not delete any existing data.

Parameters

Filename, the fully qualified path to the file containing the chain to be imported

Return

boolean indicating if chain was imported

Example

admin.importChain("/tmp/chain.txt")

admin_exportChain

Export the blockchain to a file

Parameters

Filename, the fully qualified path to the file where the blockchain must be exported

Return

boolean indicating if chain was exported

Example

admin.exportChain("/tmp/chain.txt")

admin_verbosity

Set loglevel

Parameters

Level, the verbosity level with 0 the least and 6 the most verbose

Return

boolean indicating if chain was exported

Example

admin.verbosity(5)

admin_setSolc

Set the path to the solidity compiler for eth.compileSolidity.

Parameters

Path, full path to solidity compiler

Return

string in case the path was valid a brief description about the solidity compiler

Example

admin.setSolc("/tmp/solc")

admin_startRPC

Start the HTTP RPC interface

Parameters

(support for optional arguments requires geth version >=1.4)

ListenAddress, open listener on this host (optional, default "localhost")
ListenPort, open listener on this port (optional, default 8545)
CorsDomain, the cross origin resource shared header (optional, default"")
Apis, comma separated list with the API modules which are offered over this interface (optional, default "eth,net,web3")

Return

boolean indication if the interface was started

Example

admin.startRPC("127.0.0.1", 8545, "*", "eth,net,web3")

admin.startRPC(null, null, "http://chriseth.github.io", null)

admin_stopRPC

Stop the HTTP RPC interface

Return

boolean indication if the interface was stopped

Example

admin.stopRPC()

admin_startWS

Start the websocket RPC interface (requires geth version >=1.4)

Parameters

ListenAddress, open listener on this host (optional, default "localhost")
ListenPort, open listener on this port (optional, default 8546)
allowedDomains, server side check on the Origin header (optional, default "")
Apis, comma separated list with the API modules which are offered over this interface (optional, default "eth,net,web3")

Return

boolean indication if the interface was started

Example

admin.startWS("127.0.0.1", 8546, "*", "eth,net,web3")

admin.startWS(null, null, "http://chriseth.github.io", null)

admin_stopWS

Stop the websocket RPC interface

Return

boolean indication if the interface was stopped

Example

admin.stopWS()

debug_dumpBlock

Dump block

Parameters

integer, block number

Return

string dumped block

Example

debug.dumpBlock(0)

debug_getBlockRlp

Get RLP encoded block

Parameters

integer, block number

Return

string RLP encoded block

Example

debug.getBlockRlp(0)

debug_printBlock

Pretty print block

Parameters

integer, block number

Return

string formatted block

Example

debug.printBlock(0)

debug_processBlock

Reprocess a block

Parameters

integer, block number

Return

boolean indication if the block was successful processed

Example

debug.processBlock(0)

debug_seedHash

Block seed hash

Parameters

NONE

Return

string block seed hash

Example

debug.seedHash(eth.blockNumber)

debug_setHead

Rewind the chain to a specific block

Parameters

integer, block number

Return

boolean indication if the new head was successful set

Example

debug.setHead(eth.blockNumber-5000)

miner_start

This will generates the DAG if necessary and starts the miner

Parameters

integer, an optional integer which specifies the number of threads, if not specified the number of CPU's is used

Return

boolean indicating if the miner was started

Example

miner.start()

miner_stop

This will stop the miner

Parameters

none

Return

boolean indicating if the miner was stopped

Example

miner.stop()

miner_hashrate

Miner hashrate

Parameters

none

Return

integer hashes p/s

Example

miner.hashrate

miner_setExtra

Store additional data in a mined block

Parameters

string string with extra data (max 1024 bytes)

Return

boolean indication if the DATA was set

miner_setGasPrice

Set the gas price.

Parameters

string gas price, this can be a base8 (start with 0b), base10 (no prefix) or base16 representation (start with 0x)

Return

boolean indication if the new price was set

miner_startAutoDAG

Pregenerate the DAG, this will allow for a seamless transition between the different epochs. If not enabled the miner will need to generate the DAG when a new epoch begins (each 30k blocks). This takes some time and will stop the miner until the DAG is generated.

Parameters

none

Return

boolean indication if the command was successful

miner_stopAutoDAG

Stop DAG pregeneration.

Parameters

none

Return

boolean indication if the command was successful

miner_makeDAG

Start the DAG creator process.

Parameters

none

Return

boolean indication if the command was successful

net_peerCount

The number of connected peers

Parameters

none

Return

integer number of peers

Example

net.peerCount

net_listening

Indication if this node is currently listening for new peers

Parameters

none

Return

boolean indication if this node accepts new peers

Example

net.listening

personal_listAccounts

List all accounts

Parameters

none

Return

array collection with accounts

Example

personal.listAccounts

personal_newAccount

Create a new account

Parameters

string, passphrase to protect the account

Return

string address of the new account

Example

personal.newAccount("mypasswd")

personal_unlockAccount

Unlock an account

Parameters

string, address of the account to unlock

string, passphrase of the account to unlock (optional in console, user will be prompted if empty)

integer, unlock account for duration seconds, use 0 if the account must be locked forever. If not specified 300 is used by default.

Return

boolean indication if the account was unlocked

Example

personal.unlockAccount(eth.coinbase, "mypasswd", 300)

txpool_status

Number of pending/queued transactions

Parameters

NONE

Return

pending all processable transactions

queued all non-processable transactions

Example

txpool.status