Validating on Polkadot: The First 11 Days Banner Image

11 Days Validating on Kusama: First Impressions & Emerging Power Dynamics

It has been 11 days since we joined the active validator set for Kusama, and I wanted to share some initial thoughts on the experience in case this is helpful to other validators, nominators, or other participants thinking about engaging with Kusama or Polkadot.

The first impression to convey is that interest in Kusama and Polkadot is high. Currently there are 140 validators that have signaled their intent to validate. Since Kusama switched from PoA to PoS thus switching block production from a limited set of Web3 Foundation-run validators to a decentralized set of validators, the number of validator slots has incrementally increased from 20 to 50, 60, 75, and currently stands at 100. At no time have there been any empty slots and there are currently 40 validators waiting for an opportunity to validate.

This stands in contrast to many other projects that have struggled to recruit enough competent validators to launch their networks. This is a really good sign for Polkadot as they near their MainNet launch.

Parity Team Actively Addresses Bumps in the Road

The process of launching Kusama has and continues to flush out issues.

There have been several point releases: 0.6.7, 0.6.8, 0.6.9, including an issue with 0.6.8 that led to database corruption for some validators. There are performance issues actively being worked on now, which will undoubtedly lead to more releases. Some validators have been slashed or removed from the active set, either due to issues with the software or a failure to run nodes properly.

However, the number of issues has really been relatively small. In each case, the Parity team has been very responsive in diagnosing and fixing issues. All things considered, for a system as complex as Kusama, this has been a very smooth launch process.

Two Primary Types of Validators

The validators in the active set are ones that meet the minimum effective staked KSM levels needed to be in the top 100.

Many of these appear to be representing DOT holders who could claim KSM based on their DOT holdings and thus, have large bonded amounts. I’m inferring this from the fact that transfers are not yet enabled, so large positions would have to come from claimed KSM.

The other set of validators are those that are not existing DOT holders and received KSM grants from W3F to be able to validate. The grants were 10 KSM, so I’m assuming that many validators with bond amounts less than 10 KSM are likely in this bucket. Many of these validators have received nominations, presumably from W3F and possibly others, to get into the active set.

There hasn’t been enough time for validators to really start to market themselves to try to attract nominations. This will presumably start to happen as the Kusama launch process continues to unfold, transfers are enabled, and the validator limit is potentially raised further.


NPoS Validator Strategies

While it is too early to tell what strategies validators will use to go to market, there is one notable strategy that has emerged: the “sprawl” strategy.

Cryptium Labs is currently running 19 of the 100 validators in the active set. This is far more than anyone else on the network at this time. In NPoS (Nominated Proof of Stake) this is not only allowed, but perhaps expected. Given the fact that validators are compensated a flat fee for their service, running as many validators as can get into the active set is an economically rational validator strategy.

However, for some, the realization that large players could occupy may of the available slots was disheartening. Here is an exchange from the Riot rooms (where most of the discussions are happening) that illustrates the sentiment:

Fredy from DragonStake started with:

I wonder how the core ( Gav Bill | W3F federico … ) feel about the current adrianbrink | Cryptium Labs sybil attack.

Once we enable the TXs, the whole slots table could be filled with just 2 or 3 independent validators teams. Any concern?

Adrian from Cryptium Labs was quick to respond:

adrianbrink | Cryptium Labs

[snip…] public blockchains need to be designed so that they are secure against rational actors. Security based on altruism isn’t going to last long.
Btw, I’m not suggesting that Polkadot consensus is insecure. Maybe there needs to be more education about it though

And finally from Gavin:


i think it’s reasonable for w3f to use its KSM to keep the validator community pluralistic.


w3f has its funds;
w3f should act in whatever way it feels is best for the network;
having an active validator community with well-dispersed knowledge is good for kusama;
w3f should use some of its funds to help keep lesser staked validators of high reputation engaged.

This short exchange cuts right to the heart of some of the interesting ideas and dynamics around NPoS and how it will play out. Some good questions that this exchange raises: Will the NPoS design ultimately favor a smaller set of larger validators occupying multiple slots, or will it drive greater validator diversity? Is there such a thing as economically rational behavior that conforms to the protocol, but that nevertheless should be sanctioned or discouraged by social norms and convention?

NPoS is meant to be an improvement over standard DPoS in networks like Cosmos or Tezos. Its design does appear to be intended to discourage or prevent the concentration of stake behind any one validator, as doing this would lead to less staking returns for rationally-motivated nominators.

It is also meaningfully different from standard DPoS (Delegated Proof of Stake) because it has a separation between political power and validator services. This could guard against scenarios where, for example, validators are run for free to gather political power, as appears to be the case with the largest Cosmos validator. Many feel this leads to a weaker validator set, as it becomes difficult to fund legitimate validator businesses.

But if validator power can still be expressed in NPOS by allowing organizations or entities to have more than one — or perhaps dozens — of validators, it seems that some of the decentralization benefit of NPoS may not be as great as many believed would be the case.

I sympathize with Fredy from DragonStake’s point of view that the health of the network is greater with a more diverse set of validators, and that smaller validators shouldn’t have to rely on the goodwill of the W3F to have a shot at making it into the active set. And while W3F’s commitment to validator diversity is admirable, I also agree with Adrian from Cryptium Labs that what happens on these platforms is largely determined by the actions of rational economic actors playing by the rules codified in the protocol. Even if you have a set of social norms you try to enforce in your community, the permissionless nature of these systems means that someone can always come along and ignore your community and norms and do anything that the protocol allows.

It is always hard to predict how these systems will play out. But it seems likely that larger and better-established validator companies will pursue a Cryptium-style strategy on Polkadot. We may not see this yet, as they don’t want to tip their hand or take on the infrastructure expense on Kusama where the opportunity for profit is not possible. It will be interesting to see if, in the end, there is more or less validator diversity in Polkadot with NPoS versus Cosmos, Tezos, and other networks employing the simpler DPoS mechanism.

Decentralized Networks Are Magic

In the end, what has happened over the last 10 days demonstrates the magic of these new decentralized platforms. Probably something on the order of 100 organizations or people from different backgrounds, locations, skills all came to the table with complicated setups of software and infrastructure to help launch and support a network.

This network is something larger than any one participant could have created and wouldn’t be possible without the contributions of all of the participants. I can think of no better example of the power of platforms like Polkadot to organize people and activity in ways that weren’t previously possible, to allow anyone to join, to compensate the participants for their contributions, and to create something emergent and higher order as a result.

Keep an eye out as transfers will be enabled on Kusama soon, and I expect further shifts of stake and in the active validator set once that happens. Also feel free to leave me feedback on Riot if you agree (or disagree) with anything in this post:

Interested in staking with PureStake on Kusama? Nominate this address:


How to Become a Polkadot Validator Blog Banner Image

Here Are the 4 Factors That Convinced Us to Become a Polkadot Validator

We have spent the last several months researching existing and soon-to-be-launched public blockchains, and we have come to the conclusion that Polkadot is an extremely ambitious and interesting project. Many teams are already building projects to be ready by the time the MainNet launches.

Given PureStake’s infrastructure and DevOps expertise as a company, the obvious way for us to engage is as a validator helping to secure the network. From there, we may expand to additional services within the Polkadot ecosystem.

This post will go into some of the rationale that led us to this decision. One of the most important points that influenced us is that the Polkadot vision aligns well with our vision of a multichain future. We also think that developer adoption is key to the success of next generation chains, and Polkadot is well positioned in this regard.

How Polkadot is Different

Too many chains are trying to do everything and be good at everything. The idea of blockchains that can talk to each other opens the door for specialization. Much like the unix philosophy, individual Polkadot parachains can focus on doing one thing and doing it well. And larger effects can be achieved through composability of different components.

Polkadot has an ability to accelerate innovation by significantly reducing the barriers to blockchain development and allowing a rich ground for experimentation. The Polkadot MainNet launch is fast approaching and we are excited to provide secure and reliable validation services for the network. What follows are the reasons we choose Polkadot over all the other networks out there.

Top 4 Reasons PureStake is Validating on Polkadot

Reason #1: Formidable Ecosystem & Leadership

Even though Polkadot hasn’t launched yet, they have already amassed an impressive ecosystem of notable developers, validators, partners, and projects, not least of which is Parity itself.

In addition to leading the development of Polkadot, Parity has a strong history and track record of delivering crypto infrastructure projects at production-grade performance and quality levels. The Parity Ethereum client is currently supporting a large part of the production Ethereum MainNet, and thus already supporting billions of dollars of crypto value. The Parity team, including Gavin Wood, are very close to Ethereum and familiar with all of its shortcomings; as a result, they are well-positioned to address Ethereum’s critical scalability challenges with Polkadot.

While Polkadot obviously has not yet built a community the size of the Ethereum’s, it has already generated tons of information, documentation, chat groups activity, and videos that make it relatively easy for newcomers to get up-to-speed.

At the launch of the Polkadot MainNet, they will have substantial scalability and programmability advantages over Ethereum 1.0. Until Ethereum 2.0 becomes a reality, Polkadot seems well-positioned to gain developer traction, including by stealing away some market share from Ethereum.

Reason #2: Flexible Underlying Framework (Substrate)

Polkadot is built on Substrate, an impressive developer framework that can be used to build a Polkadot-compatible blockchain. Substrate is a very powerful framework for developing blockchain applications and it provides a lot of choices to developers who are looking to build a decentralized applications.

If you want full control over your blockchain, you can use Substrate Core to build an application-specific blockchain that won’t even be part of the Polkadot network. Developing a blockchain this way will be much faster than rolling your own, as it handles many of the low-level subsystems that you will need out-of-the-box.

Substrate gives you flexibility, though. Rather than using Substrate Core, you could pull from the SMRL library of modules to plug in already-developed functionality for things like accounts and balances, fungible tokens, consensus mechanisms, and smart contract functionality. Alternatively, you could opt for the highest level of abstraction, Substrate Node, to get up-and-running with a custom blockchain very quickly and efficiently.

The quality and functionality of Substrate will almost certainly help draw developers in and spur adoption of Polkadot.

Reason #3: Scalable Design

Polkadot implements a Proof of Stake-based consensus mechanism on its main relay chain that uses a scheme called Nominated Proof of Stake. Proof of Stake-based consensus mechanisms offer several significant advantages over Proof of Work and other consensus algorithms, including scalability.

Right now, on the Polkadot Alexander TestNet, blocks are being produced roughly every 6 seconds. This is significantly faster than Ethereum (which is currently producing blocks every 13-13.5 seconds) and provides a scalable foundation for the rest of the system.

Another way that Polkadot achieves scalability is by parallelizing execution using parachains. Each parachain can have its own blockchain, and each of these parachains connects back to the main relay chain. By parallelizing execution into many parachains, Polkadot will inherently be much more scalable than a single chain network like Ethereum — at least until Ethereum 2.0 and its very similar concept of shards is realized.

Parachains will allow for more transaction throughput through parallelization, but separating transactions into different parachains also can provide economic scalability. Developers of applications occupying parachain slots have control over the economics of transactions. They have the ability to make certain classes of transactions less expensive, or perhaps even free, as opposed to a single economic model that is in use on more traditional single blockchain systems. This will allow developers to optimize their applications on Polkadot to achieve cost scalability when deployed.

Reason #4: Solid Security Posture

There are many parts of the Polkadot design that provide compelling security advantages, but there are two examples that stand out.

Stash Accounts and Controller Accounts

In our experience running crypto infrastructure at PureStake, a lot of time is spent worrying about key security, particularly keys that need to be warm or hot and online, versus cold and offline.

For a Polkadot validator, there are three different types of accounts and keys involved in the setup: a stash account, a controller account, and a session account. The stash account can be totally cold and offline — where you keep your funds. The controller account is warm, but needs to hold only a very minimal set of funds to perform certain specific transactions. And the session account is hot, but has no funds in it.

This design is much more secure than almost any other crypto network, since it allows you to store essentially all of your funds cold and offline.

Shared Validators

The shared validator security model in Polkadot provides security-as-a-service for all of the parachains.

This is quite different from Cosmos (which is the other major next-gen network) that enables parallelized application-specific blockchains. In Cosmos, each zone is on its own to recruit validators for security.

There are a lot of next-gen blockchains launching in 2019 and 2020 with some form of Delegated Proof of Stake which need professional validators to help secure their networks. There simply aren’t enough professional validators to go around and secure all of these networks. By having a shared security model, Polkadot has removed a big barrier to launching a parachain which should speed up adoption of the network.

What’s Next for PureStake as an Early Polkadot Validator

To date, PureStake has been providing node, API, and other infrastructure services for blockchain networks, including supporting the Algorand MainNet launch in June.

Now we are expanding our services to become a validator on Polkadot and the Kusama BetaNet (in preparation for the Polkadot MainNet launch). We will leverage a lot of what we’ve already built to support the Algorand network — the skills on the team, existing infrastructure, and code — to deliver highly reliable and secure validator services for Polkadot stakers. That includes:

  • Base compute infrastructure
  • Base storage infrastructure including blockchain snapshot / restore
  • Base network, VPC, VPN infrastructure
  • Authentication and authorization services
  • DevOps automation stack
  • Multi-cloud approach across AWS, Azure, and Google
  • Elastic load-balancer and firewall infrastructure
  • IDS, IPS, vulnerability management services
  • OS patch management and automation
  • Key and secrets management infrastructure
  • Monitoring and alerting infrastructure
  • Log collection and analysis infrastructure
  • DevOps and SecOps processes and reporting

Since only minimal work is needed to port the elements above, we can focus our energy on elements that need more adaptation to support Polkadot validation. Some of these areas include:

  • Validator infrastructure design: create our version of the standard sentry / validator design to support the validation requirements in Polkadot’s NPoS design
  • Extend our cloud automation: support the VPC, VPN, and other networking elements that are part of the validator design
  • Update our DevOps automation at the node and blockchain storage levels to support Polkadot-specific requirements
  • Enhance our monitoring, alerting, and logging / log analysis for Polkadot
  • Add support for Polkadot keys and secrets so they can be managed securely
  • Train our DevOps team on all things Polkadot so they can effectively manage and troubleshoot the services

We expect the PureStake validator infrastructure to be ready in time for the Kusama BetaNet switch to Proof of Stake. If you’d like to learn more about our Polkadot validator or other services we are planning, drop us a line.