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Go ethereum management API's

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bas-vk edited this page Jun 23, 2015 · 33 revisions

Please note, this is work in progress and not yet available!

Overview

Beside the official DApp API interface the go ethereum node has support for additional management API's. These API's are offered using JSON-RPC and follow the same conventions as used in the DApp API. The go ethereum package comes with a console client which has support for all additional API's.

How to

It is possible to specify the set of API's which are offered over an interface with the --${interface}api command line argument for the go ethereum daemon. Where ${interface} can be rpc for the http interface or ipc for an unix socket on unix or named pipe on Windows.

For example, geth --ipcapi "admin,eth,miner" --rpcapi "eth,web3" will

  • enable the admin, official DApp and miner API over the IPC interface
  • enable the eth and web3 API over the RPC interface

Please note that offering an API over the rpc interface will give everyone access to the API who can access this interface (e.g. DApp's). So be careful which API's you enable.

By default geth enables all API's over the ipc interface and only the eth and web3 API's over the rpc interface.

To test which API's an interface provides the modules transaction can be executes, e.g. 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 API version number:

{  
   "id":1,
   "jsonrpc":"2.0",
   "result":{  
      "admin":"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"
   }
}

Integration

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

API's

The management functions are split into multiple smaller logically grouped API's.

Admin

Provides various function for managing a geth node

admin_addpeer

Add peer to node

Parameters

  • Url, peer enode url

Return

boolean indicating if the peer was added

Example

admin.addPeer("enode://[email protected]:30303")

admin_peers

This property will show all connected peers.

Example

admin.peers

admin_importchain

Import an exported chain from file into node

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

  • ListenAddress, open listener on this host
  • ListenPort, open listener on this port
  • CorsDomain, the cross origin resource shared header
  • Apis, comma separated list with the API modules which are offered over this interface

Return

boolean indication if the interface was started

Example

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

admin_stoprpc

Stop the http RPC interface

Return

boolean indication if the interface was stopped

Debug

Eth

This is the official DApp API. See for more information this page.

Miner

Allows full control over the miner and DAG.

Net

Network related functions

Personal

Support for account management.

Txpool

Allows control over the transaction pool

Web3

miner_start

This will generates the DAG if necessary and starts the miner

Parameters

  • THREADS, 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

miner_stop

This will stop the miner

Parameters

none

Return

boolean indicating if the miner was stopped

miner_hashrate

Miner hashrate

Parameters

none

Return

integer in hashes p/s

miner_setExtra

Store additional data in a mined block

Parameters

DATA string with extra data (max 1024 bytes)

Return

boolean indication if the DATA was set

miner_setGasPrice

Set the gas price.

Parameters

Price string with new 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_addpeer

Add peer

Parameters

URL, peer enode

Return

boolean indication if peer was added

net_id

The network id (can be configured from the command line through the networkid argument)

Parameters

none

Return

integer network id

net_getPeerCount

The number of connected peers

Parameters

none

Return

integer number of peers

net_getListening

Indication if this node is currently listening for new peers

Parameters

none

Return

boolean indication if this node accepts new peers

net_peers

Collection with peers

Parameters

none

Return

Array collection of connected peers.

Example

> net.peers()
[{
  Caps: 'eth/60',
  ID: 'cc8125980267bbf5853848843520debaa05f7c66c83da0fe6599bd9f88ddff4c3c69a443e555873a966acfc59abe6ec6f707f6146886774d58a519eb074657f1',
  LocalAddress: '192.168.178.13:30303',
  Name: '++eth/v0.9.23/Release/Linux/g++/int',
  RemoteAddress: '81.241.47.56:38289'
}, {
  LocalAddress: '192.168.178.13:37063',
  Name: '++eth/v0.9.23/Release/Linux/g++/int',
  RemoteAddress: '54.72.239.134:30303',
  Caps: 'eth/60, eth/61',
  ID: '4a5a722a073c1c6356e7859c611260c36a1ac5815900dad21bf55a1014e314169d6156935722b1eb00212b795cf4c74d1167c571c0dfc3795d80b39ef45c1ef3'
}, {
  ID: 'e014ceab3d2fbe7215ca55b23e031cc031f46ca582a2a7741626d6189a08e40c77ddabb5970ad532970aa1b817b1428f76dc5454a0321d32a10d6d12efce5ded',
  LocalAddress: '192.168.178.13:30303',
  Name: '++eth/v0.9.23/Release/Linux/g++/int',
  RemoteAddress: '23.94.96.233:46512',
  Caps: 'eth/60, eth/61'
} ]
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