The Ethereum Challengers, ep. 5: NEM - New Economy Movement (XEM)



Smart assets for businesses with easy-to-use templates, public and private blockchain support, and a growing ecosystem.

Public and Private Blockchain NEMjas battle for dominance. (Video version:

We’ve been investigating decentralized application platforms that might challenge Ethereum’s future market share.

So far, our Ethereum Challengers series has covered RSK (Rootstock), EOS, Cardano, and NEO.

We have many more to cover: Qtum, Ethereum Classic, Lisk, Stratis, Waves, Komodo, Counterparty, and finally, a post defending the chances of Ethereum itself.

By now, you should know I like dApp platforms.

Today, we’re looking at the New Economy Movement, NEM (pronounced “nem”), a smart asset platform whose native cryptocurrency is XEM (pronounced “zem”).

0.000001 XEM is called a makoto, and the first block of the NEM blockchain is called — I kid you not — the nemesis block.

New Economy Movement (NEM), with native asset XEM

I’m cheating a little bit by including NEM in this series. In episode 1, we introduced a few basic concepts, including Turing completeness. Since Ethereum is more or less Turing complete, I decided we would only be considering as its “Challengers” platforms which were also Turing complete.

Quick refresher: Turing completeness has a formal mathematical definition, but in this context, it means that a system can do basically anything that a general-purpose computer can do.

This means that some platforms such as Ripple and Stellar will likely not be added to the series, as they focus on more limited use cases.

NEM isn’t Turing complete, but it still could challenge Ethereum.

NEM is not quite Turing complete, as its Mosaics offer templates that app developers can use to piece together their applications’ blockchain-side operations.

Ethereum stores smart contracts compiled into bytecode on the blockchain iteslf. But on NEM, businesses do not need place a custom-written smart contract on the blockchain — instead, they write any code they need elsewhere and use templates to interact with the NEM blockchain. Some third-party solutions are also in the works to offer template-like features on Ethereum, such as Crowd Machine.

Despite this difference, since the templates NEM offers provide for the vast majority of use cases we’re seeing on Ethereum — and since more templates will likely be added in the future if holes in functionality are found — I’m letting NEM into the series.

After all, Ethereum isn’t 100% Turing complete, anyway, and NEM claims that 95% of the apps on Ethereum can run with the same functionality on NEM.

Plus, the introduction to the NEM whitepaper starts with a quote from my favorite modern fiction author. This is from Kafka on the Shore. True to the genre, it has a translation typo. True to Kafka, it doesn’t matter.

NEM Presence and Protester at Consensus 2018

NEM and a number of apps running on its platform had an impressive presence at last week’s Consensus convention.

There was even an unwitting NEM promoter posted outside.

I took a pic, but not a pick.

I have used protesting as a means of communication a number of times — though usually without sleeping on the front lines.

So while I had seen John Fenley before, I wanted to hear his story in person. I did a quick interview with him on video amidst the Consensus crowds. Several others stopped to listen.

Some of the Twitter NEM community knew much more about the saga then I did, though, and pointed me to several resources, including

Responses from the @nemofficial Twitter account appeared and were soon deleted, but the actual evidence seems to be clearly in favor of NEM.

And since we live in a time where “no publicity is bad publicity,” Fenley’s presence may have only served to increase interest in NEM. I am sure we will see him at the next major area convention where NEM is present.

The NEM ecosystem’s room was packed with projects at Consensus 2018.

NEM: Providing Blockchain for Businesses

NEM — like last week’s NEO — is focused on businesses.

Many businesses want to try blockchain technology these days.

Like this famous blockchain tech company.

But businesses looking to add the advantages of blockchain to their network already have established systems. Redesigning their entire infrastructure to integrate blockchain would be an enormous expense.

That’s why NEM is focused on enabling easy integration for businesses.

This includes easy-to-configure templated smart asset control for businesses, Mijin’s commercial blockchain services, private blockchains for businesses, human-readable namespaces, and more.

Smart Assets and Mosaics in NEM

We mentioned smart assets in our discussion of NEO’s smart economy in the last installment.

On NEM, smart assets are still the focus — defining them, issuing them, transacting with them — but they are not controlled with smart contracts located on the NEM blockchain. Instead, they can be controlled by off-chain code which interacts with the NEM API via various templates.

NEM smart assets are called Mosaics — analogous to the kinds of digital assets that were once called colored coins and today are commonly called tokens.

Sometimes NEM refers to its templating system as “off-chain smart contracts,” but that is really just an assortment of API calls that can be assembled to interact with the NEM blockchain in the way a given business needs. (Note that a number of other blockchains also allow for API access, and some other blockchains use templates for smart contracts, as well.)

API (Application Programming Interface): Just in case you’re in the space and you still don’t know what this is, an API allows programs to talk (interface) between one another. NEM, for example, publishes a dictionary of sorts that tells other developers what their API understands, and other developers can build “API calls” — requests for NEM to provide some information or take some action — using the dictionary NEM has provided for reference.

Colored Coins: We’ll talk about this more when we get to Counterparty, but a “colored coin” in its original context is a bitcoin (or fraction of a bitcoin) that has some set of attributes layered on top of it, like painting (coloring) a physical coin to convey some kind of information. Thus transferring the colored bitcoin between addresses can represent more than just the transfer of financial value.

NEM’s template system results in the code itself being less decentralized — but also easily upgradeable, and much safer on the blockchain side since the templates are standard. NEM has not suffered a major bug such as Ethereum’s DAO hack or Parity wallet freeze. The widely publicized CoinCheck hack of early 2018, which NEM tried to mitigate by tagging and tracking the stolen 530 million XEM, was not a fault of NEM’s but a breach of the CoinCheck exchange.

The old NEM logo.

Businesses hoping to interact with NEM can access its blockchain by using the NEM API from their already-existing system, without having to redesign everything in order to experiment with blockchain technology.

Covering Your Assets

The primary NEM blockchain is a public ledger of smart assets. XEM is the first, native asset on the chain, and is used to pay transaction fees for running other Mosaics.

But NEM also offers businesses the ability to run on a private blockchain.

You have to have the sound turned on for this one.

This mashup of public and private tech is again reminiscent of NEO — whose partner OnChain helps businesses build their own blockchains plugged into the NEO Smart Economy. Businesses working with NEM can use Mijin to build private (permissioned) NEM-tech blockchains with support for multiple assets, multi-signature accounts, and smart contracts.

Mijin, whose version 2 is named Catapult and is currently the subject of most NEM news, is developed by the Japanese company Tech Bureau.

Hiring a blockchain developer is not a requirement, since Mijin offers a JSON API that it claims is simple and easy to use. Businesses can communicate with this API using any common programming language they prefer.

Financial institutions, similarly, can build on NEM tech via NEM partner Dragonfly.

The NEM Ecosystem

A large number of projects are building on the New Economy Movement — though admittedly not nearly as many as on Ethereum. Besides the multiple NEM open source and community-funded projects such as payment, notarization, and copyright management tools, here are some of the projects that were present at Consensus this year:

Another example of a NEM project is Prover, which aspires to achieve what projects like Kinesense are also working on: authentication that video is unmodified. This ultimately has applications for combating fake news, proving copyright, and establishing evidence.


Basic Initial Coin Offerings are preposterously easy to set up on NEM, but most businesses moving into the NEM economy have not elected to run ICOs.

There have been exceptions, such as, which concluded its ICO in February 2018. I expect that we will see more ICOs on NEM soon as Catapult launches and the ecosystem grows.

Speaking of Catapult…


Catapult is the next-generation NEM blockchain engine, version 2 of Mijin.

While Mijin v1 was an extension of the NEM public blockchain, Catapult is an extension of the Mijin private chain back into the NEM public chain.

Catapult brings several significant features, including:

  • Trustless decentralized swaps. Buyers can purchase from exchanges without needing to custody their assets with the exchanges. For example, if I want to buy the deed to a house listed on an exchange for 1,000,000 XEM, Catapult can send the 1,000,000 XEM from me to the seller, the deed from the exchange to me, and the 600 or so XEM exchange fee to the exchange. The exchange itself never holds my keys or my XEM tokens.
  • Automatic fee payment. If I want to send someone $50 in U.S. dollars using a Catapult app, but I don’t have XEM to pay for the transaction fee, Catapult can easily convert a tiny portion of the USD (probably less than 1 cent, in this case) to pay the fee. Users on Catapult apps may never even be aware that they are running on NEM and that XEM transaction fees are required.
  • Multi-faceted transactions. Perhaps the exchange listed in example 1 is throwing a special deal: buy any property, get free tickets to a concert in town. Catapult can handle all three transfers: the property price to the seller, the property to the buyer, and the free tickets to the buyer.
  • Multi-level multi-signature transactions with AND/OR logic. These allow for fraud detection, account recovery, supply chain management and more. This is a very useful feature for security. In the example below, I can give my hardware wallet key the rights to control my XEM without any other signature needed. But I can also give my less-secure phone wallet the rights to control my XEM — but only when transactions are also signed by another key, such as my 2FA device or a Fraud Detection API.

NEM Consensus: Proof of Importance

I’ve normally discussed each platform’s consensus and issuance method before throwing our seven big questions at it, so let’s do the same quickly for New Economy Movement.

Proof of Importance determines the “importance” — according to NEM, the quality of work done — of each node staking at least 10,000 XEM. Observers in the network determine the “importance” of nodes validating transactions. This is similar to but different from proof of stake. Sybil (51%) and loop attacks are both mitigated by the way the system is built.

As a NEM user, your importance is determined by several factors including:

  • How much XEM is in your wallet
  • How long the XEM has been in your wallet
  • The number and quality of your transactions on NEM

Vesting XEM

Vesting is a large part of the NEM Proof of Importance consensus model. 10% of the unvested XEM in a user’s wallet vests each day. So, if you had 90,000 XEM in a wallet, 9,000 would vest on day one, 8,100 on day two, and so on.

When a wallet sends XEM, the amount sent is taken from both the vested and unvested XEM in a way that maintains the wallet’s current proportion of vested XEM. However, sending XEM is one of the most significant ways for a node to increase its reputation, or importance, on the network and thus to have a higher chance of harvesting some XEM as a reward.

NEM nodes with at least 10,000 vested XEM become harvesters on the NEM network. Like miners, but without Proof of Work, harvesters help the network verify transactions and are in turn rewarded some XEM.

Harvesters connect to NEM supernode harvesting slots. Supernodes serve as hubs for harvesters and can be created by staking 3,000,000 vested XEM. Unlike many masternode coins, XEM provides relatively modest rewards of a few percentage points annually to supernodes.

Harvester revenue depends on importance and tends to be quite low, as NEM fees are very low. Some users report only a few XEM in months of harvesting.

Harvesting XEM without Exposing Private Keys

NEM also features delegated harvesting, where NEM nodes can transfer importance. For example, a NEM node can send its importance to a remote server.

If I want to run a NEM node but am not able to keep my computer online all day, I can make a Virtual Private Server. This is common practice for people setting up masternodes for other cryptocurrencies.

However, since my VPS is maintained by a web hosting company and connectable to via SSH, I may believe it is a security risk to place my wallet there and unlock my private keys on the VPS. Importance transfers allow me to keep my XEM and the private keys to it secure while using the importance that account generates to harvest from a different machine.

For more details see Section 7 of the NEM whitepaper equivalent, the “Technical Reference.”

NEM vs. Ethereum

Now, let’s see how NEM stacks up against our Big Questions.

1. Scalability

NEM’s Proof of Importance consensus mechanism allows for several thousand transactions per second. Full confidence time, according to NEM, is under 30 seconds. Security debates around consensus models aside, this is orders of magnitude more transactions than Ethereum can currently handle as of this writing.

2. Governance

NEM has a certain level of on-chain governance. Community proposals can be voted on by nodes who have staked at least 10,000 XEM. At least 3% must vote in order for an affirmative vote to pass a proposal. You can view some community-picked proposals here.

3. Development Complexity

NEM prides itself in being easy for businesses to interact with. Businesses can use their current system and any programming language they prefer to interact with NEM via API. Building for NEM isn’t necessarily writing code but using NEM templates that cover all common blockchain use cases.

4. Timeline

NEM is live, along with a number of applications. NEM itself does not typically release roadmaps, possibly to avoid speculation on news, but Catapult Public is expected to become NEM’s core engine by the end of this year, bringing a number of the features we discussed above to the NEM platform.

5. Adoptability

NEM offers namespaces — human-readable account names like @pete and @apple and @irs that can be used securely instead of complex alphanumeric addresses. NEM does charge small transaction fees in XEM, but Catapult allows these fees to be auto-converted. Many applications can be built in such a way that end users do not know they are paying XEM transaction fees and do not need to hold XEM.

To be fair, both of these user-friendly features are in the works for Ethereum, though not on the core protocol layer but as third-party additions.

6. Generalized Features

NEM represents the opposite end of the spectrum from Ethereum as far as generalized features are concerned. Every smart asset (Mosaic) on NEM is managed using templates that provide the required functionality. This does mean that a very small percentage of apps needing functionality not available with any Mosaic cannot build on NEM yet.

NEM estimates that 95% of current Ethereum dApps can be easily built on NEM with all the features they need.

7. Market Position

NEM is working with 100+ businesses through Mijin. The NEM ecosystem is growing, and NEM has established significant footholds in places such as Japan, China, Russia, Italy, and Latin America. NEM development is supported by the Foundation, which has tens of millions of dollars of financial resources earmarked for development.

I don’t know whether time will show that Proof of Importance has the security the New Economy Movement claims, or whether the ecosystem will continue to grow before larger competitors become too dominant.

But I am excited to follow the New Economy Movement as it grows. The strength of the community, and innovations both in the core protocol and by the businesses running on NEM, continue to capture my attention.

Let me know what you think of NEM on Twitter.

The blockchain space moves at breakneck speed, with developments often undocumented and old materials still propagated, so it is difficult to write an article that is not out of date the moment it is published. If you have any updates to what I’ve written here, please let me know.

And make sure you come back soon for the next installment: Qtum, another challenger from China.


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