Public Node Sync

Newest snapshots for the Cronos Proof Of Steak (POS) Blockchain

Introduction

Public Node Snapshots provided by blockchain infrastructure company Allnodes offer a streamlined solution for Cronos node operators looking to quickly sync with the Cronos POS network. These snapshots are available as one-time bulk downloads and significantly reduce initial setup time and bandwidth requirements for new nodes.

The snapshots provide are pruned data for both Cronos EVM and Cronos POS mainnet blockchains, optimized for file size and download speed. This guide walks you through the step-by-step process of performing a quick synchronization using Public Node Snapshots.

Note: If you need complete blockchain history to operate a full archive node, Native Snapshots or Quicksync archive snapshots are the recommended alternatives.

Step 1: Download Public Node Snapshot

Users can visit Public Node Snapshots page and Select "Cronos POS Chain" from the available options to download the preferred.lz4 compressed snapshot file.

The snapshot file will be named similar to: cronos-pos-pruned-[height-range].tar.lz4

Step 2: Install Required Tools

To start with Public Node Sync, install the LZ4 compression tool by running brew install lz4 in a new terminal.

Step 3: Chain-maind Setup

Download and Install Chain-maind

1. Download the latest chain-maind binary from the Cronos POS Chain GitHub repository based on your operating system.

2. Extract the downloaded file by tar -zxvf chain-main_6.0.1_Darwin_arm64.tar.gz After you unzip the chain-maind to the location you desire. In terminal, change directory to the bin folder, where chain-maind is located.

3. Verify Installation:

# check the version of chain-maind
cd bin
./chain-maind version
6.0.1

Initialize and Configure

1. Initialize chain-maind (refer to the initialization steps from the main documentation)

2. Configure the node by editing the configuration file:

nano ~/.chain-maind/config/config.toml

Update the seed nodes with the latest available seeds (as the list of the seed is subject to change, check the official documentation for current seed list).

1. Start Chain-maind briefly to create the necessary directory structure:

./chain-maind start

Once you see the node syncing for a couple of blocks, terminate the process (Ctrl+C). OR, perform Step 3.1 Run Everything, terminate the terminal once chainmaind is able to sync for couple of blocks.

Step 4: Extract Snapshot Data

After successfully initializing Chain-maind, you'll find the .chain-maind folder in your user directory.

1. Move the snapshot lz4 file to the Chain-maind directory:

mv cronos-pos-pruned-18968897-18968907.tar.lz4 ~/.chain-maind/

1. Navigate to the Chain-maind directory:

cd ~/.chain-maind

1. Extract the snapshot data:

lz4 -d cronos-pos-pruned-18968897-18968907.tar.lz4 | tar -xv

Important: All extracted files should be placed under ~/.chain-maind/data/.

Step 5: Start Your Synced Node

With the snapshot data extracted, chain-maind should now be updated to the latest height from the snapshot file.

Start your node:

./chain-maind start

Conclusion

You are now running a synced Cronos POS mainnet node using the Public Node Snapshot. Your node will continue to sync from the snapshot height to the current network height, which should be much faster than syncing from genesis.