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Run a Testnet Validator

Requirements

  • Minimum stake: 500,000 FTM
  • Minimum hardware requirements: AWS EC2 m5.large with 8GB RAM, 2 vCPUs and at least 300GB of Amazon EBS General Purpose SSD (gp2) storage (or equivalent).
  • We would recommend going with Ubuntu Server 20.04 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 run your opera node.

Install Required Tools

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:
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# Install build-essential
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(validator)$ sudo apt-get install -y build-essential
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# Install go
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(validator)$ wget https://dl.google.com/go/go1.17.7.linux-amd64.tar.gz
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(validator)$ sudo tar -xvf go1.17.7.linux-amd64.tar.gz
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(validator)$ sudo mv go /usr/local
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# Export go paths
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(validator)$ vi ~/.bash_aliases
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# Append the following lines
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export GOROOT=/usr/local/go
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export GOPATH=$HOME/go
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export PATH=$GOPATH/bin:$GOROOT/bin:$PATH
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#
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source ~/.bash_aliases
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Install Opera

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# Install Opera
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(validator)$ git clone https://github.com/Fantom-foundation/go-opera.git
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(validator)$ cd go-opera/
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(validator)$ git checkout release/1.1.0-rc.4
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(validator)$ make
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Validate your Opera installation:
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$./build/opera help
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​
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VERSION:
4
1.1.0-rc.4
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Register Testnet Validator

Next, register your Fantom testnet validator node. 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:
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# Start opera node
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(validator)$ cd build/
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(validator)$ wget https://opera.fantom.network/testnet.g
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(validator)$ nohup ./opera --genesis testnet.g --nousb &
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Create a validator wallet

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:
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# Create validator wallet
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(validator)$ ./opera account new
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After entering the command, you will get prompted to enter a password for the account (= wallet). It will look something like this:

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 (https://github.com/Fantom-foundation/lachesis_launch/blob/master/docs/create_validator.md):
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(validator)$ ./opera validator new
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Follow the prompts and supply the password, the output is as follows:
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Your new key was generated
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​
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Public key: 0xPubkey
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Path of the secret key file:
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​
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- You can share your public key with anyone. Others need it to validate messages from you.
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- You must NEVER share the secret key with anyone! The key controls access to your validator!
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- You must BACKUP your key file! Without the key, it's impossible to operate the validator!
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- You must REMEMBER your password! Without the password, it's impossible to decrypt the key!
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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:
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# Attach to opera console
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(validator)$ ./opera attach
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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):
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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":true,"inputs":[],"name":"currentSealedEpoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"getEpochSnapshot","outputs":[{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"epochFee","type":"uint256"},{"internalType":"uint256","name":"totalBaseRewardWeight","type":"uint256"},{"internalType":"uint256","name":"totalTxRewardWeight","type":"uint256"},{"internalType":"uint256","name":"baseRewardPerSecond","type":"uint256"},{"internalType":"uint256","name":"totalStake","type":"uint256"},{"internalType":"uint256","name":"totalSupply","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"getLockupInfo","outputs":[{"internalType":"uint256","name":"lockedStake","type":"uint256"},{"internalType":"uint256","name":"fromEpoch","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"uint256","name":"duration","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"getStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"getStashedLockupRewards","outputs":[{"internalType":"uint256","name":"lockupExtraReward","type":"uint256"},{"internalType":"uint256","name":"lockupBaseReward","type":"uint256"},{"internalType":"uint256","name":"unlockedReward","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"getValidator","outputs":[{"internalType":"uint256","name":"status","type":"uint256"},{"internalType":"uint256","name":"deactivatedTime","type":"uint256"},{"internalType":"uint256","name":"deactivatedEpoch","type":"uint256"},{"internalType":"uint256","name":"receivedStake","type":"uint256"},{"internalType":"uint256","name":"createdEpoch","type":"uint256"},{"internalType":"uint256","name":"createdTime","type":"uint256"},{"internalType":"address","name":"auth","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"getValidatorID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"getValidatorPubkey","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"getWithdrawalRequest","outputs":[{"internalType":"uint256","name":"epoch","type":"uint256"},{"internalType":"uint256","name":"time","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"lastValidatorID","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"maxDelegatedRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"maxLockupDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"minLockupDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"minSelfStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"slashingRefundRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"stashedRewardsUntilEpoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalActiveStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSlashedStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"unlockedRewardRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"validatorCommission","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"version","outputs":[{"internalType":"bytes3","name":"","type":"bytes3"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"withdrawalPeriodEpochs","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"withdrawalPeriodTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[],"name":"currentEpoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"epoch","type":"uint256"}],"name":"getEpochValidatorIDs","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"epoch","type":"uint256"},{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"getEpochReceivedStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"epoch","type":"uint256"},{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"getEpochAccumulatedRewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"epoch","type":"uint256"},{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"getEpochAccumulatedUptime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"epoch","type":"uint256"},{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"getEpochAccumulatedOriginatedTxsFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"epoch","type":"uint256"},{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"getEpochOfflineTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"epoch","type":"uint256"},{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"getEpochOfflineBlocks","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"delegator","type":"address"},{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"rewardsStash","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"delegator","type":"address"},{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"getLockedStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"sealedEpoch","type":"uint256"},{"internalType":"uint256","name":"_totalSupply","type":"uint256"},{"internalType":"address","name":"nodeDriver","type":"address"},{"internalType":"address","name":"owner","type":"address"}],"name":"initialize","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"auth","type":"address"},{"internalType":"uint256","name":"validatorID","type":"uint256"},{"internalType":"bytes","name":"pubkey","type":"bytes"},{"internalType":"uint256","name":"status","type":"uint256"},{"internalType":"uint256","name":"createdEpoch","type":"uint256"},{"internalType":"uint256","name":"createdTime","type":"uint256"},{"internalType":"uint256","name":"deactivatedEpoch","type":"uint256"},{"internalType":"uint256","name":"deactivatedTime","type":"uint256"}],"name":"setGenesisValidator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"delegator","type":"address"},{"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"internalType":"uint256","name":"stake","type":"uint256"},{"internalType":"uint256","name":"lockedStake","type":"uint256"},{"internalType":"uint256","name":"lockupFromEpoch","type":"uint256"},{"internalType":"uint256","name":"lockupEndTime","type":"uint256"},{"internalType":"uint256","name":"lockupDuration","type":"uint256"},{"internalType":"uint256","name":"earlyUnlockPenalty","type":"uint256"},{"internalType":"uint256","name":"rewards","type":"uint256"}],"name":"setGenesisDelegation","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes","name":"pubkey","type":"bytes"}],"name":"createValidator","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"getSelfStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"delegate","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"internalType":"uint256","name":"wrID","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"undelegate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"validatorID","type":"uint256"}],"name":"isSlashed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"internalType":"uint256","name":"wrID","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"validatorID","type":"uint256"},{"internalType":"uint256","name":"status","type":"uint256"}],"name":"deactivateValidator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"delegator","type":"address"},{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"pendingRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"delegator","type":"address"},{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"stashRewards","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"claimRewards","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"restakeRewards","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"validatorID","type":"uint256"},{"internalType":"bool","name":"syncPubkey","type":"bool"}],"name":"_syncValidator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"offlinePenaltyThreshold","outputs":[{"internalType":"uint256","name":"blocksNum","type":"uint256"},{"internalType":"uint256","name":"time","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"name":"updateBaseRewardPerSecond","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"blocksNum","type":"uint256"},{"internalType":"uint256","name":"time","type":"uint256"}],"name":"updateOfflinePenaltyThreshold","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"validatorID","type":"uint256"},{"internalType":"uint256","name":"refundRatio","type":"uint256"}],"name":"updateSlashingRefundRatio","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256[]","name":"offlineTime","type":"uint256[]"},{"internalType":"uint256[]","name":"offlineBlocks","type":"uint256[]"},{"internalType":"uint256[]","name":"uptimes","type":"uint256[]"},{"internalType":"uint256[]","name":"originatedTxsFee","type":"uint256[]"}],"name":"sealEpoch","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256[]","name":"nextValidatorIDs","type":"uint256[]"}],"name":"sealEpochValidators","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"delegator","type":"address"},{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"isLockedUp","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"delegator","type":"address"},{"internalType":"uint256","name":"toValidatorID","type":"uint256"}],"name":"getUnlockedStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"internalType":"uint256","name":"lockupDuration","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"lockStake","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"toValidatorID","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"unlockStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]')
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… as well as the SFC contract object itself:
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sfcc = web3.ftm.contract(abi).at("0xfc00face00000000000000000000000000000000")
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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:
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// Sanity check
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sfcc.lastValidatorID() // if everything is all right, will return a non-zero value
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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:
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# Get your validator id
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sfcc.getValidatorID("{VALIDATOR_WALLET_ADDRESS}")
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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):
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# Unlock validator wallet
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personal.unlockAccount("{VALIDATOR_WALLET_ADDRESS}", "{PASSWORD}", 60)
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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 be 1e18 will result in 500,000 FTM. Alternatively, you can use web3.toWei("500000.0", "ftm")). Use quotes for "0xYOUR_PUBKEY" and "0xYOUR_ADDRESS":
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# Register your validator
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tx = sfcc.createValidator("0xYOUR_PUBKEY", {from:"0xYOUR_ADDRESS", value: web3.toWei("500000.0", "ftm")}) // 500000.0 FTM
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Make sure to check your registration transaction (could take a few moments to be confirmed):
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# Check your registration transaction
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ftm.getTransactionReceipt(tx)
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Look for the status: “0x1” at the bottom, which means the transaction was successful.
You can also copy the transactionHash and go the Fantom Explorer and check your transaction there:
https://explorer.testnet.fantom.network/transactions/[YOURTX]
Finally, execute the following command again to check your validatorID:
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# Get your validator id
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sfc.getValidatorID("{VALIDATOR_WALLET_ADDRESS}")
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It should now return something other than “0”.
Congrats, you've registered a testnet validator!

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:
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(validator)$ nohup ./opera --genesis testnet.g --nousb --validator.id ID --validator.pubkey 0xPubkey --validator.password /path/to/password &
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Contents
Requirements
Install Required Tools
Register Testnet Validator
Create a validator wallet
Create a new validator key
Create your validator via the SFC
Run your Testnet Validator Node