Relay Chain

A podcast on blockchain development & building the decentralized web

About the show

Relay Chain is a podcast covering blockchain development and building the decentralized web. We focus on the cutting edge of blockchain tech, including Substrate and Polkadot.

Brought to you by Parity Technologies, a core blockchain infrastructure company. Parity is creating an open-source creative commons that will enable people to create better institutions through technology.

Follow us at @paritytech and @relaychain.

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  • On-Chain Trust with KILT Protocol

    November 21st, 2019  |  45 mins 44 secs
    blockchain, polkadot, substrate, web3

    How do trust and identity work in decentralized systems, and how can we help ensure our data isn't abused by centralized authorities?

    In this episode, Joe Petrowski is joined by Ingo Rübe (Founder and CEO, BOTlabs) and Timo Welde (Product Owner and Technical Lead, KILT Protocol) of KILT Protocol, a built-on-Substrate project providing credentialing and authentication for web 3.0. Learn the difference between identity and attribution, and how KILT is building the future of decentralized trust.

  • Jillian York: Censorship, Human Rights, and Activism in the Digital Age

    November 7th, 2019  |  1 hr 3 mins
    blockchain, ethereum, polkadot, web3

    Where should digital platforms draw the line between content moderation and censorship? How do company policies shape our culture, and how can we make technology a force for good?

    In this episode, writer and activist Jillian York (Director for International Freedom of Expression, Electronic Frontier Foundation) joins Joe Petrowski (Research Analyst, Parity Technologies) to discuss freedom of expression, censorship and surveillance by digital platforms, and the role of internet activism in global social movements.

  • Mentorship and Values in Open-Source Development

    October 25th, 2019  |  48 mins 1 sec
    blockchain, ethereum, polkadot, substrate, web3

    How do you create meaningful change with open-source software and what role does mentorship play?

    In this episode, Joe Petrowski (Research Analyst, Parity) talks to Ben Kampmann (Core Developer, Parity) about the role of mentorship, learning, and values in the open-source community. They also discuss Open Tech School, a non-profit organization Ben created for open source education, as well as recent Substrate developments, including Substrate LFS (Large File Storage).

  • Mona El Isa and how Melon Protocol is disrupting asset management

    October 11th, 2019  |  42 mins 36 secs
    blockchain, ethereum, melon protocol, melonport, web3

    Joe Petrowski (Research Analyst, Parity) talks to Mona El Isa (Co-Founder Melonport, MAMA) about using Melon Protocol to reduce the barriers in setting up and managing funds. Mona discusses delivering on a two-year roadmap, IRL Melon experiments, and educating the next generation of financial industry disruptors.

  • Exploring a Multi-Chain Universe with Polkascan

    September 27th, 2019  |  1 hr 1 min
    block explorer, blockchain, ethereum, polkadot, substrate, web3

    In our fifth episode, Nicole Zhu and Joe Petrowski talk to Emiel Sebastiaan, WEB3SCAN CEO, about Polkascan, an open-source block explorer that allows any Substrate-based blockchain project to have a block explorer. They discuss the Polkadot multi-chain explorer, how a DAO could fund block explorer services, Polkascan vs. Polkadot UI, and the nitty-gritty of how one actually goes about extracting data from a blockchain.

  • Zcash’s Anna and Deirdre on Zebra and quantum-resistant cryptography

    September 13th, 2019  |  48 mins 25 secs
    blockchain, ethereum, polkadot, web3

    In this episode, Joe talks to Deirdre Connolly and Anna Kaplan from Zcash Foundation on the state of the Rust Zcash client, “Zebra,” originally developed by Parity Technologies and now maintained by Zcash Foundation. They also discuss integrating cryptography into our day-to-day lives, quantum-resistant cryptography, and what baby zebras are called.

  • Staking and Validating on Kusama and Polkadot

    August 29th, 2019  |  51 mins 18 secs
    blockchain, kusama, nominating, npos, polkadot, staking, validating, validator

    Gautam Dhameja (Solutions Architect, Parity) talks to Joe Petrowski (Research Analyst, Parity) about staking, validating, and nominating on Kusama and Polkadot. If you want to learn more about how Kusama's and Polkadot's nominated proof-of-stake system works, or if you're interested in staking or validating, this episode is a great place to start. To get more information on staking, validating, and validator setup on Kusama, check out the Kusama network guide at

    NOTE: At 8:00, Joe mistakenly mentions that the controller account can be used to vote on governance proposals. Actually, the stash account can set a proxy account to vote on its behalf. It could be the same as the controller but does not have to be.

  • Clovyr’s Amber Baldet and Patrick Nielsen on Building Simple Tools for a Wider Reach

    August 23rd, 2019  |  49 mins 39 secs
    blockchain, blockchain development, clovyr, web3

    Amber Baldet and Patrick Nielsen from Clovyr discuss building simple, easy-to-use tools for a far wider reach, customizability vs. ease-of-use, non-surveillance business models, targeting developers who so far have not cared about blockchain, decentralization as an ongoing process, and why working for large corporations has its value.

  • Gavin Wood: Building Tech That Protects Our Interests

    August 6th, 2019  |  41 mins 9 secs
    blockchain, ethereum, polkadot, web3

    Dr. Gavin Wood, Ethereum Cofounder and Founder Polkadot & Parity Technologies, discusses nation states vs. protocols, building technology that fundamentally protects our interests, and the most important skills for those looking to get into the blockchain industry.