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README.md

LK-Chain

License

Supporting golang implementation of the Ethereum protocol.

Building the source

Building lk-chain requires Go (version 1.9.2).
System Centos 7.
Install git lfs before, and then clone this project.
To build the full suite of utilities:

./build.sh all

or, to clean build path:

./build.sh clean

Executables

The LK-Chain project comes with several wrappers/executables found in the pack/lk-chain/bin directory.

Command Description
ethermint Ethereum protocol
tendermint Tendermint Core is Byzantine Fault Tolerant (BFT) middleware

Running LK-Chain

Going through all the possible command line flags is out of scope here (please consult our CLI Wiki page), but we've enumerated a few common parameter combos to get you up to speed quickly on how you can run your own Ethermint and Tendermint instance.

Full node on the main LK-Chain network

# go to sbin path.
cd pack/lk-chain/sbin

# init the node data in the first time.
./start.sh init DataPath

# start the node
./start.sh start DataPath

# if you want to stop the instance
./start.sh stop

Configuration

ethermint Configuration:

  • --rpcport 44000
  • --lkrpc_addr 0.0.0.0:45000

tendermint Configuration:

  • --rpc.laddr tcp://0.0.0.0:41000

Programatically interfacing LK-Chain nodes

The IPC interface is enabled by default and exposes all the APIs supported by Ethermint, whereas the HTTP and WS interfaces need to manually be enabled and only expose a subset of APIs due to security reasons. These can be turned on/off and configured as you'd expect.

You can use ethermint like geth console:

[root@localhost sbin]# ../bin/ethermint attach http://127.0.0.1:44000
Welcome to the Geth JavaScript console!

 modules: admin:1.0 eth:1.0 net:1.0 personal:1.0 rpc:1.0 web3:1.0

> eth.blockNumber
65719

or request a JSON-RPC API,like this:

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"],"id":1}' -H 'Content-Type:application/json' http://127.0.0.1:44000

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x0234c8a3397aab58" // 158972490234375000
}

Ethermint HTTP based JSON-RPC API options:

  • --rpc Enable the HTTP-RPC server
  • --rpcaddr HTTP-RPC server listening interface (default: "localhost")
  • --rpcport HTTP-RPC server listening port (default: 8545)
  • --rpcapi API's offered over the HTTP-RPC interface (default: "eth,net,web3")
  • --rpccorsdomain Comma separated list of domains from which to accept cross origin requests (browser enforced)
  • --ws Enable the WS-RPC server
  • --wsaddr WS-RPC server listening interface (default: "localhost")
  • --wsport WS-RPC server listening port (default: 8546)
  • --wsapi API's offered over the WS-RPC interface (default: "eth,net,web3")
  • --wsorigins Origins from which to accept websockets requests
  • --ipcdisable Disable the IPC-RPC server

Find more JSON-RPC APIs on file doc/json-rpc.md.

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