Ink Protocol and the Replin App Aim to Decentralize P2P Marketplaces through Cross-Platform Seller Profiles and Payments Powered by Blockchain Technology

Ink Protocol and the Replin App Aim to Decentralize P2P Marketplaces through Cross-Platform Seller Profiles and Payments Powered by Blockchain Technology

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Adam West
By: Adam West
Posted: March 26, 2019
Our experts and industry insiders blog the latest news, studies and current events from inside the credit card industry. Our articles follow strict editorial guidelines.

In a Nutshell: Person-to-person (P2P) marketplaces are popular with consumers who want to buy, sell, and trade used goods online. But buyer and seller transaction histories and reputations don’t transfer from platform to platform. That’s why, in 2017, Listia introduced Ink Protocol, a blockchain-powered reputation storage and payment system. And it built on that technology to create Replin, an app that allows P2P marketplace users to store their data in a decentralized environment and take their reputation with them to any platform.

In 1995, eBay entered the world of ecommerce as one of the first person-to-person (P2P) marketplaces. Since then, the web has exploded with a host of similar P2P platforms that give consumers the freedom to buy, sell, and trade new and used goods directly with other consumers.

In the absence of trusted brands and business reputations, P2P marketplace users must rely on user profiles, verified payment methods, and feedback to build confidence. Some marketplaces even mediate disputes or serious complaints between buyers and sellers to reach amicable resolutions.

Screenshot of Ink Protocol blockchain connections

Listia developed Ink Protocol as a decentralized payment and reputation system that leverages blockchain technology.

Even though these types of marketplaces offer a measure of buyer-seller security, there’s a catch. While users can post items on other platforms, their profiles — often with years of transaction history and reviews — don’t transfer. Venturing on to new marketplaces means starting the process of building trust all over again.

But, with an innovation known as Ink Protocol — a decentralized, blockchain-powered reputation and payment system — P2P marketplace users can take their business anywhere while preserving and building their personal credentials.

Listia, an online marketplace where consumers trade goods, introduced Ink Protocol in 2017. Since then, Listia has continued to develop Ink Protocol-powered applications such as InkPay and Replin, a reputation management app currently in beta.

“We have this vision of building decentralized marketplaces,” said Gee Chuang, Co-Founder and CEO of Listia and Ink Protocol. “The idea is that you should be able to buy and sell with anyone online in a safe and efficient way. People feel safe about the typical eBay transaction. What we’re trying to do is remove eBay from the equation and build an open-source system that allows you to feel that same comfort when buying and selling with people — without a middleman.”

Designed as a comprehensive solution for both independent buyers and sellers, Ink Protocol and Replin have far-reaching implications for an increasingly diverse mobile marketplace.

Ink Protocol: A Payment and Reputation System That Offers Sellers Freedom and Security

At the core of Ink Protocol is the Ink token (XNK), a cryptocurrency designed by Listia to trade for goods on its platform. But it handles far more than just payments.

“It has features like dispute resolution, escrow, and a built-in reputation system to ensure users feel safe,” Chuang said.

Ink Protocol’s design relies on what’s known as the Ink smart contract, which is stored on the Ethereum blockchain. The Ink smart contract stores a seller’s XNK tokens, along with transaction information and a “hash” that represents the feedback left by the buyer. Just like the blockchain that powers it, Ink Protocol is open-source, which means it can be used in a wide range of applications and platforms beyond Listia — including numerous ecommerce marketplaces.

“The whole protocol takes what we’ve learned in Listia over the last nine years and puts it all into one system designed to be used everywhere,” Chuang said.

In August 2018, Listia introduced InkPay — its first decentralized application, or DApp, based on Ink Protocol. InkPay supports XNK and two other cryptocurrencies, and allows users to buy and sell on marketplaces such as Craigslist or Facebook Marketplace — which don’t have their own payment systems built in. With each transaction, sellers gather buyer feedback, which can be displayed to build their reputation and boost sales wherever they choose to do business.

Since InkPay deals solely in cryptocurrency, it’s an ideal fit for those who are already adept at using smart contracts, digital wallets, and private keys.

“Sometimes, it’s hard for non-crypto enthusiasts to wrap their heads around, but it’s available and it works. And it will be ready as consumers catch up to this technology,” Chuang said.

Replin: The Ink Protocol App with PayPal-Powered Payments

In early March 2019, Listia launched the beta version of its mainstream consumer reputation app Replin, which integrates Ink Protocol’s reputation and feedback mobility.

“Replin is the non-cryptocurrency version of InkPay. It still uses Ink Protocol and the blockchain to store all the information, but you don’t have to use cryptocurrency. We’ve been working with PayPal, so the payments are all powered by its platform,” Chuang said. “The idea is to help you build up a single public reputation wherever you sell. It helps you gain your buyer’s trust without getting in the way of how you currently use marketplaces.”

Screenshots of Listia profile on mobile devices

Replin allows users to take their reputations with them across P2P marketplace platforms, including Listia.

As its name suggests, Replin is all about reputation. Since it stores transaction and feedback data, users can start earning and showing off their reputation across multiple marketplaces via an easy-to-post link. Since Listia currently stores its user history via Ink Protocol, users who download Replin can immediately export their Listia feedback — as far back as its founding in 2009. Soon, the marketplace will allow users to take any new reputation they earn using Replin on other platforms and display it on Listia, as well.

“You’ll load that feedback into the app and then show it off when you’re selling on Craigslist, Facebook Marketplace, or anywhere. We give you a link to your profile that you can now paste and share everywhere,” Chuang said. “You can say, ‘This is me, check out my profile.’ And the buyer can pay you directly through PayPal. That’s all built in.”

After its full release, Replin will be available in web, mobile web, iOS, and Android versions. And, while InkPay and Replin remain separate for now, Listia envisions the day when the growing cryptocurrency ecosystem enables them to join forces. “Long-term, we think they’ll merge,” Chuang said.

Listia’s Use of Blockchain Technology Empowers the Mobile-First P2P Marketplace of the Future

With trusted seller reputation systems and the freedom to set your own prices, P2P marketplaces remain popular places to buy, sell, and trade used goods online. But they are still middlemen who keep seller reputations locked into one platform.

Today’s mobile-first consumers want the flexibility to take their business anywhere, without sacrificing peace of mind or their hard-earned reputations. With Replin, consumers will have an efficient way to accomplish that.

Ink Protocol, built into consumer-facing apps InkPay and Replin, looks to the decentralized marketplace of the future with options that allow users at every stage of crypto-awareness to embrace the freedom of a mobile reputation and payment system.

“It opens you up to the whole world of commerce with anybody online, and that’s the vision we have,” Chuang said. “We’re pushing it on our own platforms right now, but, long term, we hope it becomes the standard for how people transact with one another.”