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What is a Blockchain Validator? A Brief Explanation

What is a Blockchain Validator_ A Brief Explanation

The validators are at the heart of a blockchain network that integrates the role to maintain the ecosystem. By actively participating in transaction validation and consensus mechanisms, validators make the blockchain more trustworthy, improve network security, and ensure that recorded transactions are accurate. In this post, we discuss who these blockchain validators are, the various crypto validator types, and their importance in a crypto network!

What is a Blockchain Validator?

A participant in a blockchain network who checks and examines transactions or blocks is called a “blockchain validator.” They are essential to keeping the blockchain safe and secure, ensuring only valid transactions are added to the ledger. Validators can be chosen differently, such as by how much of the network’s original cryptocurrency they own. 

Blockchain validators ensure that transactions are real and follow the network rules. They also stop bad actors from pulling moves like double-spending. Further, validators help reach a consensus by agreeing with other validators about whether transactions or blocks are acceptable. 

How to Become a Blockchain Validator?

Follow these basic steps to become a crypto validator:

1. Choose a blockchain network: Choose a blockchain platform that uses a consensus method like Proof of Stake (PoS) that requires validators to maintain the system.

2. Acquire the native cryptocurrency: Get enough of the network’s original cryptocurrency, often needed as a stake to become a validator.

3. Set up a validator node: Follow the steps unique to each blockchain network to install the right software and set up a validator node on your computer or server.

4. Stake your cryptocurrency: Lock the native crypto you own as a stake, making it a part of the network. The process of staking will be different for each blockchain network.

5. Participate in the network: Once your validator node is up and running, you can actively participate in the validation process by checking transactions, proposing blocks, and coming to a consensus with other validators.

6. Keep up your good behavior: Follow the network’s rules and standards, be honest, and don’t take any steps that could lead to penalties or the loss of the cryptocurrency you’ve staked.

Remember that the exact process to become a blockchain validator can change based on the blockchain platform and its needs, so it’s essential to look at the documentation and community resources the blockchain network of your choice provides.

What are the Types of Crypto Validators?

Crypto validators types
Source | What is a blockchain validator: Crypto validators types

1. Proof of Work Validators

Proof of Work (PoW) validators participate in a consensus process where they compete to solve complex math puzzles to verify transactions and make new blocks. These validators use the power of their computers to do a lot of calculations to find an answer that meets the network’s requirements. The first validator to find the answer sends it to the network. If the solution is good, the validator gets some of the native cryptocurrency as a reward. 

PoW validators are of course better known as miners. Bitcoin is a well-known example of a blockchain network based on Proof of Work.


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2. Proof of Stake Validators

Proof of Stake (PoS) validators are chosen to verify transactions and create blocks based on how much cryptocurrency they own and are ready to lock up as a stake. Validators are selected by chance; the higher the stakes, the more likely they will be picked. 

PoS validators use less energy than PoW validators because they don’t need as much computing power. They ensure that deals are honest by putting their money on the line as collateral. PoS gives validators a reason to care about the network’s security and makes it easier to add more users. Some well-known PoS-based blockchain networks are Ethereum 2.0 and Cardano.

Want to know more about proof of stake & proof of work? Here is the Difference between Proof of Work & Proof of Stake article! Check out this article and get all the information you need.

3. Delegated Proof of Stake Validators 

In Delegated Proof of Stake (DPoS) consensus, token holders vote for a few trusted validators, block producers, or delegates to validate transactions and make blocks on their behalf. These validators are in charge of keeping the network running and are chosen based on how many votes they get. DPoS gives faster proof of blocks and the ability to grow, but it gives up some decentralization. The voting process lets token holders participate in governance and have a say in who gets chosen as a validator. EOS and TRON are two examples of blockchains that use DPoS.

4. Byzantine Fault Tolerant Validators

Byzantine Fault Tolerant (BFT) validators take part in consensus methods that are made to handle faults or bad behavior. All BFT validators agree on whether a transaction is valid and in what order it should be added to the blockchain. Using a Byzantine fault-tolerant consensus system ensures that the network can agree even if some validators are broken or acting dishonestly. Focusing on fault tolerance, BFT-based blockchains can handle various possible threats or failures. Hyperledger Fabric and Tendermint are two blockchains that use BFT.

What is the Usage of Crypto Validators?

Usage of Crypto Validators
Source | Usage of Crypto Validators

1. Transaction Validation

In a blockchain network, the job of the crypto validators is to verify transactions. They ensure that deals are real and honest and follow the rules and protocols of the network. Validators make sure that transactions are real, that the person has enough money, and that people don’t spend the same money twice. By looking at the details of transactions and doing validation checks, they help keep the blockchain record honest and accurate. Transaction validation by validators builds trust among network members, ensures that recorded transactions are valid, and helps keep the blockchain system open and reliable.

2. Consensus Building

Crypto validators are a vital part of how a blockchain network comes to an agreement. They participate in the consensus process, which is how they agree on the correctness and order of transactions or blocks as a group. Validators use their computing power, stakes, or voting power to help reach a consensus mechanism. This ensures the network has a shared and unchangeable history of transactions. By building consensus, validators create a network where no one has to believe anyone else, and everyone agrees on the state of the blockchain. This consensus method allows the network to withstand attacks from bad actors, keep data consistent, and provide a trustworthy and hard-to-change ledger.

3. Network Security

Crypto validators are a vital part of ensuring a blockchain network is safe. By verifying transactions and helping to reach a consensus, they add to the security and integrity of the network as a whole. Further, the validators themselves are punished if their conduct is found to be less than ideal, which adds to the security factor. By protecting the network from possible attacks and maintaining a strong consensus process, validators help keep the blockchain safe from unauthorized access and maintain its integrity.


In conclusion, crypto validators are essential to how blockchain networks function and keep their security and integrity. They are responsible for verifying deals, coming to a consensus, and keeping the network safe. Validators check that transactions are real and follow the rules, ensuring that only real transactions are added to the blockchain. A trusted and unchangeable record is created by validator consensus building, where participants agree on the order and validity of transactions. 

Further, validators help keep networks safe by stopping fraud, following network rules, and guarding against threats from bad actors. Their involvement and approval efforts ensure that blockchain systems are reliable, transparent, and decentralized.

Frequently Asked Questions (FAQs)

1. What does a Validator do?

In a blockchain network, a validator is the one who checks and approves transactions or blocks. They make sure that transfers are real and correct and follow the rules and protocols of the network. Validators are a key part of keeping the security and stability of the blockchain by stopping double spending and ensuring there are enough funds. By taking part in consensus processes, validators agree on the validity and order of transactions, ensuring that the blockchain ledger is consistent and clear. Their work is vital for building trust among network users and ensuring the blockchain system is reliable.

2. What does a Shardeum Validator do?

In Shardeum, validator nodes have the advantage of only keeping state data, which means they need to be involved in little technicalities and can join the network faster. This makes it easier for a broader range of people to become validators, which helps the network become less centralized in turn. By needing less computing power and resources, running a validator becomes easier for regular users, encouraging higher participation. The process supports a more open and diverse network by making it easier to become a validator. This strengthens the Shardeum ecosystem’s general decentralization and resilience.

3. How many Validators are there in the Blockchain?

The number of validators in a blockchain network depends on the network and how it was made. Different blockchain systems may have different ways of choosing validators. Some networks have a set number of validators, while others have a number that changes based on things like the size of the stakes, how voting works, or who is in charge. Over time, as new validators join the network or old ones leave, the exact number of validators in a blockchain can change. To find out how many validators are in a given blockchain network, it’s best to look at the documentation for that network.

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