laconicd/docs/quickstart/run_node.md

Run a Node

Run a local node and start the REST and JSON-RPC clients {synopsis}

Pre-requisite Readings

• Installation {prereq}

Script deployment

Run the local node with faucet enabled:

::: warning The script below will remove any pre-existing binaries installed. Use the manual deploy if you want to keep your binaries and configuration files. :::

./init.sh

In another terminal window or tab, run the Ethereum JSON-RPC server as well as the SDK REST server:

emintcli rest-server --laddr "tcp://localhost:8545" --unlock-key mykey --chain-id 8

Manual setup

These instructions are for setting up a brand new full node from scratch.

First, initialize the node and create the necessary config files:

emintd init <your_custom_moniker>

::: warning Monikers can contain only ASCII characters. Using Unicode characters will render your node unreachable. :::

You can edit this moniker later, in the $(HOME)/.emintd/config/config.toml file:

# A custom human readable name for this node
moniker = "<your_custom_moniker>"

You can edit the $HOME/.emintd/config/app.toml file in order to enable the anti spam mechanism and reject incoming transactions with less than the minimum gas prices:

# This is a TOML config file.
# For more information, see https://github.com/toml-lang/toml

##### main base config options #####

# The minimum gas prices a validator is willing to accept for processing a
# transaction. A transaction's fees must meet the minimum of any denomination
# specified in this config (e.g. 10uatom).

minimum-gas-prices = ""

Your full node is now initiallized.

Start node

To start your node, just type:

emintd start

Key Management

To run a node with the same key every time: replace emintcli keys add $KEY in ./init.sh with:

echo "your mnemonic here" | emintcli keys add $KEY --recover

::: tip Ethermint currently only supports 24 word mnemonics. :::

You can generate a new key/mnemonic with:

emintcli keys add $KEY

To export your ethermint key as an ethereum private key (for use with Metamask for example):

emintcli keys unsafe-export-eth-key $KEY

For more about the available key commands, use the --help flag

emintcli keys -h

Keyring backend options

The instructions above include commands to use test as the keyring-backend. This is an unsecured keyring that doesn't require entering a password and should not be used in production. Otherwise, Ethermint supports using a file or OS keyring backend for key storage. To create and use a file stored key instead of defaulting to the OS keyring, add the flag --keyring-backend file to any relevant command and the password prompt will occur through the command line. This can also be saved as a CLI config option with:

emintcli config keyring-backend file

Clearing data from chain

Reset Data

Alternatively, you can reset the blockchain database, remove the node's address book files, and reset the priv_validator.json to the genesis state.

::: danger If you are running a validator node, always be careful when doing emintd unsafe-reset-all. You should never use this command if you are not switching chain-id. :::

::: danger IMPORTANT: Make sure that every node has a unique priv_validator.json. Do not copy the priv_validator.json from an old node to multiple new nodes. Running two nodes with the same priv_validator.json will cause you to double sign! :::

First, remove the outdated files and reset the data.

rm $HOME/.emintd/config/addrbook.json $HOME/.emintd/config/genesis.json
emintd unsafe-reset-all

Your node is now in a pristine state while keeping the original priv_validator.json and config.toml. If you had any sentry nodes or full nodes setup before, your node will still try to connect to them, but may fail if they haven't also been upgraded.

Delete Data

Data for the Daemon and CLI binaries should be stored at ~/.emintd and ~/.emintcli, respectively by default. To delete the existing binaries and configuration, run:

rm -rf ~/.emint*

To clear all data except key storage (if keyring backend chosen) and then you can rerun the full node installation commands from above to start the node again.

Next {hide}

Learn about running a Ethermint testnet {hide}