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First steps with Nethermind
Ethereum client
MEV
Nethermind utilities
How to setup a Nethermind only Spaceneth based chain
Spaceneth private network setup looks very similar to the above Clique setup. However, there are few major differences and will be described below.
Prerequisites
- Linux bash shell
- Docker-compose
- Docker
- jq
- Nethermind.Cli
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sudo apt-get install -y docker-compose docker.io jq
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Setup
In this setup we will create a private network of 3 Nethermind nodes running a simple testing NethDev consensus algorithm.
- create separate directory where we will store all files
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mkdir private-networking
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cd private-networking
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- create folders for each node and genesis
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mkdir node_1 node_2 node_3 genesis
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wget https://raw.githubusercontent.com/NethermindEth/nethermind/master/src/Nethermind/Chains/spaceneth.json
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cp spaceneth.json genesis/spaceneth.json
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- create subfolders in each node folder
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mkdir node_1/configs node_1/staticNodes node_2/configs node_2/staticNodes node_3/configs node_3/staticNodes
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- create a
static-nodes.jsonfile and place it innode_1/staticNodessubfolders (do this for node_2 and node_3 as well)
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cat <<EOF > node_1/staticNodes/static-nodes.json
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[
3
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]
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EOF
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- create
config.cfgfile and place it innode_1/configssubfolders (do this for node_2 and node_3 as well)
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cat <<EOF > node_1/configs/config.cfg
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{
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"Init": {
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"WebSocketsEnabled": false,
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"StoreReceipts" : true,
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"EnableUnsecuredDevWallet": true,
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"IsMining": true,
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"ChainSpecPath": "/config/genesis/spaceneth.json",
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"BaseDbPath": "nethermind_db/spaceneth",
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"LogFileName": "spaceneth.logs.txt",
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"StaticNodesPath": "Data/static-nodes.json"
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},
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"Network": {
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"DiscoveryPort": 30300,
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"P2PPort": 30300,
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"LocalIp": "10.5.0.2",
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"ExternalIp": "10.5.0.2"
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},
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"JsonRpc": {
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"Enabled": true,
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"Host": "10.5.0.2",
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"Port": 8545
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}
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}
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EOF
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For each node you will need to change following items in configuration:
LocalIp,ExternalIpandHostshould have the same value and be incremented for each node e.g. 10.5.0.3, 10.5.0.4 and so on and so forth.
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- copy
docker-composefile and place it in working directory
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version: "3.5"
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services:
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node_1:
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image: nethermind/nethermind
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command: --config config
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volumes:
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- ./genesis:/config/genesis
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- ./node_1/configs/config.cfg:/nethermind/configs/config.cfg
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- ./node_1/staticNodes/static-nodes.json:/nethermind/Data/static-nodes.json
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- ./node_1/db/spaceneth:/nethermind/nethermind_db/spaceneth
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- ./node_1/keystore:/nethermind/keystore
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ports:
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- 0.0.0.0:8547:8545
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networks:
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vpcbr:
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ipv4_address: 10.5.0.2
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node_2:
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image: nethermind/nethermind
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command: --config config
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volumes:
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- ./genesis:/config/genesis
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- ./node_2/configs/config.cfg:/nethermind/configs/config.cfg
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- ./node_2/staticNodes/static-nodes.json:/nethermind/Data/static-nodes.json
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- ./node_2/db/spaceneth:/nethermind/nethermind_db/spaceneth
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- ./node_2/keystore:/nethermind/keystore
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ports:
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- 0.0.0.0:8548:8545
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networks:
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vpcbr:
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ipv4_address: 10.5.0.3
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node_3:
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image: nethermind/nethermind
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command: --config config
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volumes:
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- ./genesis:/config/genesis
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- ./node_3/configs/config.cfg:/nethermind/configs/config.cfg
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- ./node_3/staticNodes/static-nodes.json:/nethermind/Data/static-nodes.json
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- ./node_3/db/spaceneth:/nethermind/nethermind_db/spaceneth
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- ./node_3/keystore:/nethermind/keystore
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ports:
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- 0.0.0.0:8549:8545
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networks:
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vpcbr:
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ipv4_address: 10.5.0.4
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networks:
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vpcbr:
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driver: bridge
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ipam:
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config:
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- subnet: 10.5.0.0/16
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- run each node separately so that we can copy
Enodefor each node, we will use them later
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docker-compose run node_1
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Stop the node when Nethermind initialization completes
Ctrl +C. Copy This node values to a text file. Continue with node_2 and node_3.Could not load image
You can use
Nethermind.Cli to fetch these values from nodes by executing the following.
Nethermind.Cli can be found in packages on Github Releases or Download Page.1
node.switch("http://localhost:8547")
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node.enode
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- the file should look similar to this:
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STATIC_NODE_1="enode://2281549869465d98e90cebc45e1d6834a01465a990add7bcf07a49287e7e66b50[email protected]10.5.0.2:30300"
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STATIC_NODE_2="enode://37878ec16a5ed87c9c80b4648e5428f5c768eddd79483be118319c49d11c4e535[email protected]10.5.0.3:30300"
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STATIC_NODE_3="enode://6067f06d84c207e6233dacf1f3ef961bd7231f71d5425cbaf843cf19cfd5f7e13[email protected]10.5.0.4:30300"
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- copy & paste above variables into your terminal
- for each node modify previously created empty
static-nodes.jsonfiles by appendingEnodesto them
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cat <<EOF > node_1/staticNodes/static-nodes.json
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[
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"$STATIC_NODE_1",
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"$STATIC_NODE_2",
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"$STATIC_NODE_3"
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]
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EOF
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- remove databases for each node
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sudo rm -rf node_1/db/spaceneth node_2/db/spaceneth node_3/db/spaceneth
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- run
docker-composefile
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docker-compose up
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You should see the private network working. We now need to send transactions in order to start producing blocks.
- run
Nethermind.Cli - run
node.switch("http://localhost:8547") - run
personal.listAccounts - create new account
personal.newAccount("test")
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- re-run
personal.listAccountsand copy your account address - trigger blocks producing by sending transaction using
eth_sendTransactionJSON RPC method orNethermind.Cli. Changefromproperty to your account address
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curl --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{
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"from": "0x89892f2c746d98cf270ff2a76672e493d9731c24",
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"to": "0xe1ab8145f7e55dc933d51a18c793f901a3a0b276",
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"gas": "0x76c0",
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"gasPrice": "0x9184e72a000",
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"value": "0x9184e72a",
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"data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"
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}],"id":0}' -H "Content-Type: application/json" -X POST localhost:8547
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