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TFTC: A Bitcoin Podcast

#648: Simplicity on Liquid with Andrew Poelstra

TFTC: A Bitcoin Podcast

Marty Bent

Technology

4.8764 Ratings

🗓️ 6 August 2025

⏱️ 79 minutes

🧾️ Download transcript

Summary

Marty sits down with Andrew Poelstra from Blockstream to discuss the launch of Simplicity on Liquid mainnet, a formally specified programming language that enables smart contracts with mathematical guarantees of safety and predictable execution costs, representing nearly a decade of development to bring secure, expressive scripting capabilities to Bitcoin-based systems.

Blockstream: https://blockstream.com/careers/

Simplicity: https://simplicity-lang.org/

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Transcript

Click on a timestamp to play from that location

0:00.0

You've had a dynamic where money has become freer than free.

0:10.0

If you talk about a Fed just gone nuts, all the central banks going nuts.

0:16.0

So it's all acting like safe haven.

0:18.0

I believe that in a world where central bankers are tripping over themselves to devalue their

0:23.5

currency, Bitcoin wins.

0:25.3

In the world of fiat currencies, Bitcoin is the victor.

0:29.2

I mean, that's part of the bold case for Bitcoin.

0:31.8

If you're not paying attention, you probably should be.

0:36.4

Andrew Polstrand, welcome back to the show, sir.

0:38.4

It's great to have you.

0:39.9

Hey, great to be back.

0:42.0

Like I said, I want to say it again, congrats on getting simplicity over the line.

0:47.2

I know it's been a long, almost a decade journey for Blockstream.

0:51.5

Yep, yeah, for sure.

0:52.9

We got it on to the test network less than a year ago.

0:56.9

That was a big deal.

0:57.6

But this is our first production network with real money on it,

1:00.4

that you can use simplicity now with real money,

1:02.3

which is a pretty cool thing.

1:04.4

Yeah.

1:05.1

So I guess for anybody out there who's either newer to Bitcoin,

1:12.3

unaware of simplicity.

...

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