node-launch

git clone https://github.com/Snapchain/node-launch.git
cd node-launch/sepolia
cp .env.example .env

then set ERIGON_DATA_DIR and PRYSM_DATA_DIR to the locations inside the mounted volume

run sudo mkdir -p to create those directories

Overview

Launch Erigon and Prysm to provide L1 RPC of Testnet Sepolia.

System requirements

The Sepolia node has been tested on: 8 GB Memory / 2 Intel vCPUs / 160 GB Disk + 1000 GB / SGP1 - Debian 12 x64 (DigitalOcean)

Generate JWT token

The HTTP connection between the beacon node and execution node needs to be authenticated using a JWT token. Refer to the Prysm authentication for more details.

Use OpenSSL to create the token via command:

openssl rand -hex 32 | tr -d "\n" > "jwt.hex"

Set up permission

Run the following command to avoid permission issues like

• erigontech/erigon#3950
• erigontech/erigon#12931

sudo chown 100:1000 <ERIGON_DATA_DIR>

Launch L1 node

docker compose up -d

To check logs:

docker compose logs

To test the HTTP JSON-RPC:

curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[], "id":1}' http://127.0.0.1:8545

curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_chainID","params":[],"id":1}' http://127.0.0.1:8545

curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["0x0", false],"id":1}' http://127.0.0.1:8545

To test the Beacon API:

curl -H "Content-Type: application/json" http://127.0.0.1:3500/eth/v1/beacon/headers

To convert hex number in the result to decimal, we can do printf "%d\n" 0x<xxx>