How to run a DBC validator?

About 3 min

How to run a DBC validator?

Recommended hardware
- RAM：8G
- CPU：2 cores
- Disk：100G
Generate stash account （If you already have stash account, you can skip this）
- Option 1: Install polkadot{.js} adds-on
  - Chrome, install via Chrome web storeopen in new window
  - Firefox, install via Firefox add-onsopen in new window
  Then generate by polkadot{.js}
- Option 2: Generate account from https://www.dbcwallet.io/?rpc=wss%3A%2F%2Finfo.dbcwallet.io#/accountsopen in new window，click Account -- Add account
- Option 3: Generate by command line:
```
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
cargo install --force subkey --git https://github.com/paritytech/substrate --version 2.0.1 --locked
subkey generate --scheme sr25519
```

Get dbc-chain binary

Option 1: use pre-build version (If any errors, please use Option 2).

wget https://github.com/DeepBrainChain/DeepBrainChain-MainChain/releases/download/v2/dbc_chain_linux_x64.tar.gz -O dbc_chain_linux_x64.tar.gz
tar xf dbc_chain_linux_x64.tar.gz && cd dbc-chain-mainnet

Option 2: compile from source (recommended)

# install dependency
curl https://getsubstrate.io -sSf | bash -s -- --fast
source ~/.cargo/env

# compile dbc-chain
git clone https://github.com/DeepBrainChain/DeepBrainChain-MainChain.git
cd DeepBrainChain-MainChain
cargo build --release

Synchronize Chain Data

./dbc-chain --base-path ./db_data --chain ./dbcSpecRaw.json --pruning=archive --bootnodes /ip4/47.74.88.41/tcp/8947/p2p/12D3KooWD87i4TKA68P7zpGNXxUaHgvnimbgihEzDyJrmG3iGJPw

If you compile from source, the binary path is ./target/release/dbc-chain

After finished synchronize, type Control + C to close the above command. You can compare target and best to infer if sync is finished. When target is closed (100 blocks, for example) to best , it can be regard sync is finished.
- Flags in detail：
- --base-path：Specifies a directory where Substrate should store all the data related to this chain. If this value is not specified, a default path will be used. If the directory does not exist it will be created for you. If other blockchain data already exists there you will get an error. Either clear the directory or choose a different one.
  - --chain ./dbcSpecRaw.json：Specifies which chain specification to use.
  - --pruning=archive：synchronize chain data
  - --bootnodes：specified a single boot node.

After synchronizing block data finished, stop the synchronizing command. Then run the node as a validator:
```
nohup ./dbc-chain --base-path ./db_data --chain ./dbcSpecRaw.json --validator --name YourNodeName --bootnodes /ip4/47.74.88.41/tcp/8947/p2p/12D3KooWD87i4TKA68P7zpGNXxUaHgvnimbgihEzDyJrmG3iGJPw 1>dbc_node.log 2>&1 &
```
- If you compile from source, the binary path is ./target/release/dbc-chain
- You can give your validator any name that you like, but note that others will be able to see it, and it will be included in the list of all servers using the same telemetry server. Since numerous people are using telemetry, it is recommended that you choose something likely to be unique.

generaterotateKey

Run the following command in the terminal, and record the result.

curl -H "Content-Type: application/json" -d '{"id":1, "jsonrpc":"2.0", "method": "author_rotateKeys", "params":[]}' http://localhost:9933

Bond stash
- open https://www.dbcwallet.io/?rpc=wss%3A%2F%2Finfo.dbcwallet.io#/accountsopen in new window you will see your balance:
- navigate toStaking > Account actions，click stash
- You should set bond balance（Make sure not to bond all your DBC balance since you will be unable to pay transaction fees from your bonded balance.）：
Description：
- Stash account：Select your Stash account. In this example, we will bond 45 DBC - make sure that your Stash account contains at least this much. You can, of course, stake more than this.
- controller account：Select the Controller account created earlier. This account will also need a small amount of DBC in order to start and stop validating.
- value bonded：How much DBC from the Stash account you want to bond/stake. Note that you do not need to bond all of the DBC in that account. Also note that you can always bond more DBC later.
- payment destination：The account where the rewards from validating are sent.
Set Session Keys
- After bond your stash，you can see in Polkadot UI Session Keybutton：
- click it and input the result in step 5rotateKeys
- Now, check in Telemetryopen in new window and you can see your node.
Validate
- After steps above you can seeValidate button and click it,
- You should set your preference as a validator.
- In reward commission percentage you should input your commission preference. Then clieck Validate to send this transaction。Then，in Waiting page，you are waiting statusEra to be a validator.