Run Validator Node From Docker

Docker

Validator parameters

Minimum stake: 10,000 DOID
Maximum validator size: 15x the self-stake amount

Launch cloud instance

You can either run a node on your own hardware or use a cloud provider. We would recommend choosing one of the big cloud providers, e.g. Amazon AWS.

Node specifications

We recommend the following or better: General Purpose Instance with 2 vCPUs (3.5 GHz), 4GB of memory, up to 10 Gbps network bandwidth, and at least 30 GB of gp2 SSD. Bare metal with equivalent or higher specs are even better.

We would recommend going with Ubuntu Server 22.04 LTS (64-bit).

Storage

30 GB is sufficient if you're running using a pruned datadir. 100 GB is needed if you'd like to run with a full size (non-pruned) datadir. 50 GB is sufficient if you're running using a no-history genesis in snapsync mode (and then wait till it get synced to the latest block).

Install Opera Docker:

# Install Opera
docker pull doidtech/go-opera

Register DOID validator

After installing everything we need, you can continue by registering your DOID validator node on-chain. To do this, you need to create a validator wallet. The wallet is the validator’s identity in the network which it uses to authenticate, sign messages, etc. First, start the Opera read-only node to interact with it and to create a validator wallet:

# Start opera node
docker run -d -v YOUR_OPERA_DATA_DIR:/opt -p 5050:5050/tcp -p 5050:5050/udp --name opera doidtech/go-opera \
--mainnet --datadir /opt --syncmode full --http --http.addr 0.0.0.0   
docker ps

It will look something like this:

Note that https and ws must not be enabled on a server that stores wallet account.

Once it's run, you should wait till it's synced up to the latest block before proceeding to the next step.

The node running and syncing the network in your current console, so you need to open up a new console window, connect via SSH to the server and enter the following commands to create a wallet:

# Enter docker
docker exec -it opera sh
# In the Docker Container exec command
/opera account new --datadir=/opt

After entering the command, you will get prompted to enter a password for the account (= wallet) — use a strong one! You can e.g. use a password manager to generate a 20+ digit password to secure your wallet. It will look something like this:

NEVER share your private key or keystore with anyone!

By the way: The wallet above is not a real wallet we use, it’s just for demonstration purposes only.

Fund your validator wallet

The next step is to fund your validator wallet with enough DOID to become a validator. That means you need to have at least 10,000 DOID in the wallet you just created.

After successfully swapping DOID to your newly created Opera wallet, you can register your validator via the SFC Smart Contract.

Make sure you wait for your node to be fully synced, otherwise your DOID will not show up in your wallet!

Create a new validator key

We have to create validator private key to sign consensus messages with. It can be done only using go-opera:

/opera validator new --datadir=/opt

Follow the prompts and supply the password, the output is as follows:

Your new key was generated

Public key:                  0xPubkey
Path of the secret key file:

- You can share your public key with anyone. Others need it to validate messages from you.
- You must NEVER share the secret key with anyone! The key controls access to your validator!
- You must BACKUP your key file! Without the key, it's impossible to operate the validator!
- You must REMEMBER your password! Without the password, it's impossible to decrypt the key!

Create your validator via the SFC

You should wait for your node to sync to the latest block of the network before proceeding. To proceed, open up the console where you entered the commands to create the validator wallet previously and attach to the Opera node console:

# Attach to opera console
/opera attach --datadir=/opt

By doing so, you will get a JavaScript console where you can directly interact with the Opera node and e.g. send transactions (which you will do in a moment):

Now initialize the SFC contract ABI variable :

abi = JSON.parse('[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"status","type":"uint256"}],"name":"ChangedValidatorStatus","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lockupExtraReward","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lockupBaseReward","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"unlockedReward","type":"uint256"}],"name":"ClaimedRewards","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorID","type":"uint256"},{"indexed":true,"internalType":"address","name":"auth","type":"address"},{"indexed":false,"internalType":"uint256","name":"createdEpoch","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"createdTime","type":"uint256"}],"name":"CreatedValidator","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"deactivatedEpoch","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"deactivatedTime","type":"uint256"}],"name":"DeactivatedValidator","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Delegated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"uint256","name":"validatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"duration","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"LockedUpStake","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lockupExtraReward","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lockupBaseReward","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"unlockedReward","type":"uint256"}],"name":"RestakedRewards","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"wrID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Undelegated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"uint256","name":"validatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"penalty","type":"uint256"}],"name":"UnlockedStake","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"UpdatedBaseRewardPerSec","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"blocksNum","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"period","type":"uint256"}],"name":"UpdatedOfflinePenaltyThreshold","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"refundRatio","type":"uint256"}],"name":"UpdatedSlashingRefundRatio","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"wrID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"constant":true,"inputs":[],"name":"baseRewardPerSecond","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"contractCommission","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant"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… as well as the SFC contract object itself:

sfcc = web3.ftm.contract(abi).at("0xfc00face00000000000000000000000000000000")

After initializing both variables, you can now interact with the network’s SFC. Enter the following command to check that everything works as expected:

// Sanity check
sfcc.lastValidatorID() // if everything is all right, will return a non-zero value

If it looks like this, everything is OK (you should not get an error here):

Next, try to get your validatorID from the SFC using your previously generated validator wallet address:

# Get your validator id
sfcc.getValidatorID("{VALIDATOR_WALLET_ADDRESS}")

This should return 0, as you are not registered as a validator yet.

Next, unlock your validator wallet to be able to execute the registration transaction (make sure to use the password you set before). Note that, you can perform this step (unlockAccount + createValidator) in a separate machine (different from the machine you'll run your validator node), or it'd be even more secure if you use hardware wallet to do it.

# Unlock validator wallet
personal.unlockAccount("{VALIDATOR_WALLET_ADDRESS}", "{PASSWORD}", 60)

This will return “true” if unlocking the wallet was successful:

Next, send the createValidator transaction to register your validator (the value is the representation of the smallest DOID unit, so dividing it be 1e18 will result in 10,000 DOID. Alternatively, you can use web3.toWei("10000.0")). Use quotes for "0xYOUR_PUBKEY" and "0xYOUR_ADDRESS":

# Register your validator
tx = sfcc.createValidator("0xYOUR_PUBKEY", {from:"0xYOUR_ADDRESS", value: web3.toWei("10000.0")}) // 10000.0 DOID

Make sure to check your registration transaction (could take a few moments to be confirmed):

# Check your registration transaction
ftm.getTransactionReceipt(tx)

Look for the status: “0x1” at the bottom, which means the transaction was successful:

You can also copy the transactionHash and go the DOID Explorer and check your transaction there:

https://scan.doid.tech/transactions/[YOURTX]

Finally, execute the following command again to check your validatorID:

# Get your validator id
sfcc.getValidatorID("{VALIDATOR_WALLET_ADDRESS}")

It should now return something other than “0”:

Congrats, you are now a DOID validator! Close the Opera console window by typing “exit”.

Run your DOID validator node

Before you run off celebrating, you need to restart your node in validator mode! Make sure your node is already synced to the latest block in read mode, and it's synced in --syncmode full. To stop the opera process (read mode):

docker stop opera
docker remove opera

Then wait a few seconds. Then head back to the console window where you started your node with the following command:

docker run -d -v Your_Opera_DataDIR:/opt -p 5050:5050/tcp -p 5050:5050/udp --name opera doidtech/go-opera \
--mainnet --datadir /opt --syncmode full \
 --validator.id ID --validator.pubkey 0xPubkey --validator.password /path/to/password  \
 --bootnodes=enode://574617a92ab3341f8a09fa07e0ccdb0e1cf1af498b7ae9721a3e122ee5d4fa8c5b749972a0f15a10b165abc8c282c35e821f68eb9e6bb59abbba91604de7cb64@35.237.88.8:5051

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Last updated 6 months ago