Syncing Core Nodes
On the Core network, you can sync your node to the latest state of the Core Chain by several ways. In this document, we guide you through the syncing process of nodes on the Core network.
Sync From Snapshot (Recommended)​
Download the pre-build binaries from the release page or follow the instructions below
Linux​
wget $(curl -s https://github.com/coredao-org/core-chain/releases/latest |grep browser_ |grep geth_linux |cut -d\" -f4)
mv geth_linux geth
chmod -v u+x geth
MacOS​
wget $(curl -s https://github.com/coredao-org/core-chain/releases/latest |grep browser_ |grep geth_mac |cut -d\" -f4)
mv geth_mac geth
chmod -v u+x geth
Download the config files​
Download genesis.json and config.toml by:
wget $(curl -s https://github.com/coredao-org/core-chain/releases/latest |grep browser_ |grep mainnet |cut -d\" -f4)
unzip mainnet.zip
Peers Configuration​
- Mainnet: the config.toml file from the latest release ships configured with the information about the
Bootstrap Nodes
andStatic Nodes
as shown below:
BootstrapNodes =
["enode://6334cdde2728b17486e4930c29e85128694faf118c23f559c7502e1cb42dd90a54f785c80c6a493d7d6f5ed23f3c9cf75e0392b024e45f7eadc81a84544a45ff@seed4.coredao.org:0?discport=35022",
"enode://20b605d5ee978c22bfb9ed208a40f2876d3dfafb1c60a6427c4db28e516520ee610cbc2a1c0ee05dd08578a041dc9070d92cf888422ed0869d0666b5103292b4@seed2.coredao.org:0?discport=35022",
"enode://04ffc724b82e2c52df47e2439a30ca4c0f7aca5ce270f6c6bcdf539581ce2ae4965afd5c5fe19106cd528ed6f379c68687a41310054ee751a73880b2c73e85d8@seed3.coredao.org:0?discport=35022",
"enode://e9a218f70debcb6a423d68f287c972c717606a70bfed278c2f7a876493d37bc535b05127abddeeca21941fc61497a6ca13387466c75a070050862ca6da11b0ca@seed1.coredao.org:0?discport=35022"]
StaticNodes =
["enode://8c60a7445dfff047051aa686d621e8ff3fad4623ebd60aea3b8a9b5285945ff0bb05540cc215bcb0ae3fb07b6c368605ddeebeb23b282ffb2ae777d8a73155ec@18.230.84.232:35021",
"enode://af5bb3eb4278885d98dfdb994a283cd1eafec7f3cf53b13325a484a71e02613a2d724314a2d5bf2ea3b33adb0d1ad7d1c5b9e23c8d2959453a55bde5f02c762f@35.72.191.164:35021",
"enode://40811f3281241c68555179e40654971ec01b1849899e296c0852e5dfed70f3d17f776e90dced50e94cc71699e2b010eec58047ce91d07fa7a3520220cf3ce22b@13.39.140.139:35021",
"enode://ee253be3c7c2ccdd4611d16975733ceb2f41f61a04672756fa4850a0b85419ca5e07ceb5a6f1ac43318b136c8995b9160e6de0c6b4bc2c9325797c11275888e6@18.221.135.3:35021",
"enode://71f4b875a8cec01fe9f01974a682ef846ab8cbe0c23518b2a94e38eef0db829488502122b19c94d595521364bc4550639b58c0332d3942447dfd65707fc80bc0@13.214.98.126:35021"]
Download snapshot​
Download latest chaindata snapshot from here.
Start the Node​
./geth --config ./config.toml --datadir ./node --cache 8000 --rpc.allow-unprotected-txs --txlookuplimit 0
Make sure you use the version of geth you downloaded with wget above, and not your local installation of geth, which might be the wrong version.
It is recommended to run a fast node, which is a full node with the flag --tries-verify-mode none set if you want high performance and care little about state consistency.
./geth --config ./config.toml --datadir ./node --cache 8000 --rpc.allow-unprotected-txs --txlookuplimit 0 --tries-verify-mode none
Monitor node status​
You can monitor the log from /node/logs/core.log
by default.
Sync from Genesis Block (Not Recommended)​
Note that the recommended method for syncing testnet node is to sync from genesis block as currently the snapshot is not available. You can download the latest binary for testnet from here.
Write the genesis state locally by executing the following command from your node directory
geth --datadir node init genesis.json
You should see the following output:
INFO [07-18|14:57:20.715] Maximum peer count ETH=25 LES=0 total=25
INFO [07-18|14:57:20.721] Allocated cache and file handles database=/Users/jackcrypto/go/core-chain/node/geth/chaindata cache=16 handles=16
INFO [07-18|14:57:20.724] Writing custom genesis block
INFO [07-18|14:57:20.725] Persisted trie from memory database nodes=25 size=87.18kB time=226.129µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [07-18|14:57:20.725] Successfully wrote genesis state database=chaindata hash=d90508…5c034a
INFO [07-18|14:57:20.725] Allocated cache and file handles database=/Users/jackcrypto/go/core-chain/node/geth/lightchaindata cache=16 handles=16
INFO [07-18|14:57:20.729] Writing custom genesis block
INFO [07-18|14:57:20.729] Persisted trie from memory database nodes=25 size=87.18kB time=178.332µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [07-18|14:57:20.730] Successfully wrote genesis state database=lightchaindata hash=d90508…5c034a
Our full node is ready, let's start running it!
If you plan to run a normal node, you can just run the following geth
command directly:
## start a full node
geth --config ./config.toml --datadir ./node --cache 8000
Sync Mode​
There are two sync modes for running a full node: snap and full which can be specified by flag --syncmode.
-
The snap sync mode is used for initial sync, which will download the latest states rather than execute the blocks from the genesis. When the initial sync is done, it will switch to full sync automatically.
-
The full sync mode can also be used to do initial sync, which will execute all the blocks since genesis. But it is not recommended, since the amount of historical data is too large. Instead, you can download a snapshot from the official repo and start full sync from the snapshot.
-
If the flag --syncmode is not provided, the default sync mode will depend on the state of the data folder. It will be snap mode if you sync from genesis or full mode if you start from a snapshot.