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Running An Ethereum Node Part One

10 Nov 2021

Why Run an Ethereum Node?

Installing Geth

docker run --name geth -v /Users/ldong/Projects/Learning_Labs/blockchain/geth/goerli:/root/.ethereum/geth/goerli \
  -p 8545:8545 -p 30303:30303 -dit \
  ethereum/client-go:latest --goerli

What’s Happening?

INFO [11-10|19:39:50.265] Starting Geth on Görli testnet...
INFO [11-10|19:39:50.274] Maximum peer count                       ETH=50 LES=0 total=50
INFO [11-10|19:39:50.274] Smartcard socket not found, disabling    err="stat /run/pcscd/pcscd.comm: no such file or directory"
WARN [11-10|19:39:50.276] Sanitizing cache to Go's GC limits       provided=1024 updated=662
INFO [11-10|19:39:50.276] Set global gas cap                       cap=50,000,000
INFO [11-10|19:39:50.277] Allocated trie memory caches             clean=99.00MiB dirty=165.00MiB
INFO [11-10|19:39:50.277] Allocated cache and file handles         database=/root/.ethereum/goerli/geth/chaindata cache=329.00MiB handles=524,288
INFO [11-10|19:39:50.303] Opened ancient database                  database=/root/.ethereum/goerli/geth/chaindata/ancient readonly=false
INFO [11-10|19:39:50.303] Writing custom genesis block
INFO [11-10|19:39:50.311] Persisted trie from memory database      nodes=361 size=51.17KiB time=1.4678ms gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [11-10|19:39:50.312] Initialised chain configuration          config="{ChainID: 5 Homestead: 0 DAO: <nil> DAOSupport: true EIP150: 0 EIP155: 0 EIP158: 0 Byzantium: 0 Constantinople: 0 Petersburg: 0 Istanbul: 1561651, Muir Glacier: <nil>, Berlin: 4460644, London: 5062605, Arrow Glacier: <nil>, Engine: clique}"
INFO [11-10|19:39:50.314] Initialising Ethereum protocol           network=5 dbversion=<nil>
Welcome to the Geth JavaScript console!

instance: Geth/v1.10.13-unstable-0efed7f5-20211109/linux-amd64/go1.17.3
at block: 0 (Wed Jan 30 2019 13:26:31 GMT+0000 (UTC))
 datadir: /root/.ethereum/goerli
 modules: admin:1.0 clique:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0
> net.peerCount
> admin.peers
    caps: ["eth/65", "eth/66", "les/2", "les/3", "les/4", "snap/1"],
    enode: "enode://63037fb2d7072e30fdcafeb386e6fc9edab80b5b4b933a1a799d28343cde857de2b3ca1c33266f50740ce1cecdd99aefe49c469cc1186a349eb8cd4f19b4dc33@",
    enr: "enr:-KO4QB77nof221Oksl_L-S-yiWVIjTJx1Tx4o-vkA8YqiJgpBTQi4DwYpUJQoZzxzJQTt9f06_ZSwF5ugPmOo-odV2QFg2V0aMfGhLjGKZ2AgmlkgnY0gmlwhEETiIWDbGVzwQGJc2VjcDI1NmsxoQNjA3-y1wcuMP3K_rOG5vye2rgLW0uTOhp5nSg0PN6FfYRzbmFwwIN0Y3CCdl-DdWRwgnZf",
    id: "551ff030a46f72e1bb26d3bbc2f0d3cc1b6e01a6b588e651095a25150b360fd8",
    name: "Geth/v1.10.8-stable-26675454/linux-amd64/go1.16.4",
    network: {
      inbound: false,
      localAddress: "",
      remoteAddress: "",
      static: false,
      trusted: false
    protocols: {
      eth: {
        difficulty: 8536335,
        head: "0xcfe8c31251f3dc585e78fdf4c1381dcfb31b0c32727ccb67f0a63db3e25f90a6",
        version: 66
      snap: {
        version: 1
> eth.blockNumber

Creating Accounts

Your new key was generated

Public address of the key:   0xC3e10Ac93531E1C8c541AC117F410d00a855996e
Path of the secret key file: /root/.ethereum/goerli/keystore/UTC--2021-11-10T23-33-36.940215200Z--c3e10ac93531e1c8c541ac117f410d00a855996e


I played around and struggled with this for a decent amount of time. It is SUPER easy to run a node but it’s not so easy understanding what’s going on in the backend. Some of the things I attempted to do:

I haven’t even begun to try and do some mining. That’s for another day. For now, I’ll continue poking around in the Görli test network. I have to make a tweet or post something on Facebook to get Ether from the Goerli Authenticated Faucet so I think right now is a good break point. I have my node up and running inside a Docker container and I now understand how to run geth and javascript console commands!