Greg Walker

@SetDevBTC Thank you, I appreciate it.

Big shoutout to learnmeabitcoin, created by the talented @in3rsha. Outstanding content for all levels of bitcoiners.

BITCOIN RAILS #50: HISTORY OF SEGWIT & TAPROOT | with Pieter Wuille 🔗 YOUTUBE: youtu.be/QNrW4dUc_U4 A primary maintainer of Bitcoin Core from 2011-2022, Pieter Wuille is arguably the most influential developer in Bitcoin’s history since Satoshi himself. After receiving keys to the Bitcoin codebase from @gavinandresen, who was tasked with maintaining the codebase by Satoshi Nakamoto, Pieter went on to implement some of Bitcoin’s most dramatic and influential upgrades, including but not limited to: - Implementation of Bitcoin’s Taproot and Segwit upgrades - Implementation of libsecp256k + Bitcoin’s unique encoding structure for the cryptography securing all Bitcoin public/private keys - The first import/export feature for Bitcoin private keys into Bitcoin (now Bitcoin Core) - Development of hierarchical deterministic (HD) wallets, enabling backups via a single seedphrase and paving the way for seedphrases themselves - DER signatures, Miniscript, and so much more A truly special episode of Bitcoin Rails, this is a rare long-form interview with one of the most important historical figures in the arc of Bitcoin’s development. Pieter and I walk through how Bitcoin consensus works in practice, the history of Bitcoin's most critical early developments, and the key role of his good friend, Greg Maxwell, nearly every step of the way. This episode of Bitcoin Rails is powered by: — Best In Slot (@bestinslotxyz) - the leading API for Ordinals and BRC-20 data aggregation and indexing. — Spark (@lightspark) - a statechains implementation advancing Bitcoin-powered payments. — Citrea (@citrea_xyz) - a leading Bitcoin rollup technology and BitVM alliance contributor. TIMESTAMPS: 00:00 Intro 00:42 Early Days in Bitcoin 01:25 First Contributions to Bitcoin Core 04:38 Challenges and Innovations in Bitcoin Development 06:54 The Hal Finney Challenge 12:16 Bitcoin Core Contributors Back Then 14:18 The Creation of HD Wallets and Seed Phrases 17:47 Greg Maxwell Role and Relationship 21:00 Implementing Libsecp256k1 28:39 Why Did Satoshi Choose ECDSA 33:34 Addressing OpenSSL Issues 40:41 Why Pieter Wrote BIP 66 47:54 BIP 103 Proposal and Initial Reactions 49:57 SegWit Development and Implementation 01:05:39 Taproot's History, Details, and Benefits 01:11:09 Why Taproot Has No Hashed Addresses 01:16:55 Pieter's Thoughts on BitVM and other non-softfork dependent scaling solutions cc @robin_linus 01:18:27 Non-Soft Fork Scaling Solutions 01:23:03 Future Consensus Changes and Challenges 01:25:28 Bitcoin's Miner Centralization and Security Concerns (e.g. MEV) cc @TheBlueMatt 01:34:48 Miniscript: Simplifying Bitcoin Script? cc @Rob1Ham

@Pledditor @HiddenArcher_ Thank you sir.

@HiddenArcher_ Outside of tutorials, consuming bitcoin content is mostly a waste of time, tbh You will learn more about bitcoin by reading this website than you ever will watching 1,000 of Saylor podcasts: learnmeabitcoin.com/technical/

Sloppy Sessions sinking to new lows Between his falloff and Matthew Kratter's Knots crashout, there's not a single bitcoin educator I feel comfortable recommending to new people in 2026 😩😩

@nomainvest My pleasure, thank you.

This is a clear and well-written article on bytes in Bitcoin and why it is important to understand it: learnmeabitcoin.com/technical/gene… It explains some fairly technical concepts in plain, easy-to-understand language. Anyone with any interest in Bitcoin would benefit from reading it. Thanks for sharing this Greg @in3rsha !

@BitcoinMonk21 Thank you so much, it means a lot.

I saw that @in3rsha. Thanks for all your hard work and your contributions to bitcoin. I think learnmeabitcoin.com is one of the most under-appreciated bitcoin educational resources out there. It is one of the first places that helped me really start to get a grasp on this thing and it's still one of my go to places to understand some aspect of bitcoin that is confusing me. Cheers Greg!

raw₿it — Visual Raw Transaction Builder & Script Debugger An interactive tool to build and understand Bitcoin transactions visually. • Connect predefined nodes → see every byte update live • Step through script execution with live stack view • Full Python code behind each node 10 hands-on lessons included (P2PKH → SegWit, multisig, timelocks, payment channels, etc.) — all broadcast to testnet. More coming (Taproot, Lightning, covenants…). Free · open-source · educational only Try it: rawbit.io Source: github.com/rawBit-io/rawb…

Still one of the best sites out there for beginner to intermediate knowledge about bitcoin is by @in3rsha (who imo is drastically under-followed): Learn Me A Bitcoin, check it out and share!⚡️ learnmeabitcoin.com/about/

@SimplestBTCBook Thank you for this. I very much appreciate it!

Have you authored a BIP before? Considered writing one? Or just curious about the BIP process? Murch has authored BIP 3, a new process BIP which has received significant review from the community and it's time to activate it. Check it out!

greg is the devrel we all didn't know we needed

The following account is impersonating me: @in3rsha_ (underscore at the end) Please be careful if you receive any messages from "me".

Just finished building an entire bitcoin wallet from scratch, all written in C. A lot of general basic capabilities, generating a new set of mnemonics from entropy, recovery from seed, rotating through receiving addresses (only P2WPKH for now), querying wallet balance and UTXO's, and it's even able to send bitcoin by drafting a raw transaction + signing it with a witness and pubkey. Major thanks to @in3rsha and his website learnmeabitcoin. The graphics and especially the input/output tools allowed me to understand concepts and backtest my program effectively🙏. I'll post the GitHub repo once it's all done. 💯

I've written a bit about a project I've been working on for a while: peer-observer: A tool and infrastructure for monitoring the Bitcoin P2P network for attacks and anomalies b10c.me/projects/024-p…

Nonetheless, thought it might still be a good idea to try and explain how they work, albeit the best part of _8 years_ after they were introduced. (thanks to @GregTonoski for the suggestion)

Thankfully they're not as popular as they used to be now that most wallets/exchanges support sending to the new Bech32 addresses (ones that start with bc1q...). mainnet.observer/charts/inputs-… mainnet.observer/charts/inputs-… (thanks to @0xB10C for the awesome charts)

Explanation behind the design of P2SH-P2WSH (also known as "Nested P2WSH"):