Minimum hardware requirements: AWS EC2 m5.large with 8GB RAM, 2 vCPUs, and at least 300 GB of Amazon EBS General Purpose SSD (gp3) storage (or equivalent).
We would recommend going with Ubuntu Server 22.04 LTS (64-bit).
Network Settings
Open up port 22 for SSH, as well as port 7946 for both TCP and UDP traffic. A custom port can be used with "--port <port>" flag when running your testnet node.
You are still logged in as the new user via SSH. Now we are going to install Go and Opera.
First, install the required build tools:
# Install build-essential
(validator)$ sudo apt-get install -y build-essential
# Install go
(validator)$ wget https://go.dev/dl/go1.19.3.linux-amd64.tar.gz
(validator)$ sudo tar -xvf go1.19.3.linux-amd64.tar.gz
(validator)$ sudo mv go /usr/local
# Export go paths
(validator)$ vi ~/.bash_aliases
# Append the following lines
export GOROOT=/usr/local/go
export GOPATH=$HOME/go
export PATH=$GOPATH/bin:$GOROOT/bin:$PATH
#
source ~/.bash_aliases
Install Opera:
# Install Opera
(validator)$ git clone https://github.com/Fantom-foundation/go-opera.git
(validator)$ cd go-opera/
(validator)$ git checkout release/1.1.3-rc.5
(validator)$ make
Validate your Opera installation:
$./build/opera help
VERSION:
1.1.3-rc.5
db.preset
When using version 1.1.3, you need to add the db.preset argument (introduced since 1.1.2) for starting the Opera command. For standard conditions, please use this option:
db.preset=ldb-1
You can use different db presets, either --db.preset ldb-1 or --db.preset legacy-db. It's not recommended to use pbl-1 for validator nodes.
2. Register Testnet Validator
Next, register your Opera testnet validator node. You need to create a validator wallet. The wallet is the validator’s identity on the network, which it uses to authenticate, sign messages, etc.
First, start the Opera read-only node and download a genesis file from this list of genesis files.
# Start opera node
(validator)$ cd build/
(validator)$ wget https://download.fantom.network/testnet-6226-no-mpt.g
(validator)$ nohup ./opera --genesis testnet-6226-no-mpt.g --nousb \
--db.preset ldb-1 &
3. Create a Validator Wallet
The node is currently running and syncing the network in your console. To create a wallet, open a new console window, connect to the server via SSH, and enter the following commands.:
# Create validator wallet
(validator)$ ./opera account new
After entering the command, you will get prompted to enter a password for the account. It will look something like this:
4. Create a New Validator Key
We have to create a validator private key with which to sign consensus messages. It can be done only using go-opera:
(validator)$ ./opera validator new
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!
5. 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 it to the Opera node console:
# Attach to opera console
(validator)$ ./opera attach
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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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 the above, everything is working. Next, try to get your validator ID 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):
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 FTM unit, so dividing it by 1e18 will result in 500,000 FTM. Alternatively, you can use web3.toWei("500000.0", "ftm")). Use quotes for "0xYOUR_PUBKEY" and "0xYOUR_ADDRESS":
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 transaction hash and go to the Fantom Explorer and check your transaction there:
Finally, execute the following command again to check your validator ID:
# Get your validator id
sfc.getValidatorID("{VALIDATOR_WALLET_ADDRESS}")
It should now return something other than “0”. Congrats, you've registered a testnet validator!
6. Run Your Testnet Validator Node
The last step is to restart your node in validator mode! Close the Opera console window by typing “exit”. Then head back to the console window where you started your node with the following command:
