b10c's blog: Bitcoin Developer on b10c's blog

On August 8th, 2026, Bitcoin block 961632 was mined.

This is a copy of the 10th work-log I sent to OpenSats for my LTS grant.

Earlier this week, I produced a Nix-built bitcoind binary for Bitcoin Core v31.0 whose hash exactly matches the official Guix-built x86_64-pc-linux-gnu release binary.

I joined Murch, Gustavo and Mike on the Bitcoin Optech Newsletter #406 Recap Podcast to talk about TCP holepunching and peer-observer P2P monitoring tools, which both were mentioned in the Optech Newsletter #406.

This is a copy of the 9th work-log I sent to OpenSats for my LTS grant.

During last week’s demonstration of slow blocks on Signet, I ran a custom P2P client that connected to all ~190 listening Signet nodes on IPv4 and Tor.

In April 2026, Antoine Poinsot and Anthony Towns publicly demonstrated a few slow-to-validate blocks on the Signet test network.

Discussion on the landscape of exploiting bitcoin with Matthew Vuk, Matthew Zipkin, Niklas Gögge, Sjors Provoost, and 0xB10C.

Presented my hackathon project localprobe in the finals.

You’re running a Bitcoin node on the same machine as your (Firefox) web browser?

I did a recap on the a network wide DoS bug and highlighted a metrics that we are monitoring now to catch similar bugs in the future.

I held a four hour long monitoring workshop for the current Vinteum Bitcoin Developer Launchpad cohort.

This is a copy of the 8th work-log I sent to OpenSats for my LTS grant.

In this episode, Stephan Livera and I discusses my work in the Bitcoin ecosystem, focusing on the importance of censorship resistance, the role of mining pools, and the implications of OFAC sanctions on Bitcoin transactions.

I presented about “Monitoring Bitcoin’s P2P network: Insights from the peer-observer Project” at the Chaincode Labs Bitcoin Research Day 2025.

This is a copy of the 7th work-log I sent to OpenSats for my LTS grant.

Localhost Research supported my peer-observer project by sponsoring three servers for a demo instance, which can be found on demo.peer.observer.

This is a copy of the 6th work-log I sent to OpenSats for my LTS grant.

Over the past few years, I’ve been working on monitoring tools for the Bitcoin network.

In October 2024, the Bitcoin Core project disclosed a Denial-of-Service due to inv-to-send sets growing too large, which I authored, for Bitcoin Core versions before v25.0.

I presented about my peer-observer project during the BTC Prague dev/hack/day 2025.

This is a copy of the 5th work-log I sent to OpenSats for my LTS grant.

This post explores Bitcoin Mining Centralization in 2025 by looking at the hashrate share of the current five biggest mining pools.

Looking deeper into @boerst’s recent observation about invalid mining jobs by AntPool & friends to discuss his hypothesis about “selfish mining” and “glitchy template code”.

This is a copy of the 4th work-log I sent to OpenSats for my LTS grant.

My miningpool-observer project aims to detect when Bitcoin mining pools are not mining transactions they could have been mining.

This is a copy of the 3rd work-log I sent to OpenSats for my LTS grant.

I joined Gloria and Niklas on the brink.dev podcast to talk about the recently disclosed Bitcoin Core pre-25.0 vulnerabilities.

Different mining pools sending out the same or a similar block template to miners is an indicator for proxy pooling.

I spoke at the eBPF Summit 2024 about how I’m using eBPF and the USDT tracepoints in Bitcoin Core to extract P2P network events to use them for, for example, anomaly detection.

At the “Bitcoin Burg Academy” I talked about Bitcoin Core development to an non-technical audience.

This is a copy of the 2nd work-log I sent to OpenSats for my LTS grant.

I have recently been looking at mining pool behavior during forks.

This is a copy of the 1st work-log I sent to OpenSats for my LTS grant.

My notes on the two bad-blk-sigops: too many sigops invalid blocks, 783426 and 784121, mined by F2Pool in April 2023.

This is an update on the LinkingLion entity, presumably linking Bitcoin transactions to IP addresses, I published about a year ago.

In January, while investigating a misbehaving client on the Bitcoin P2P network, I found a vulnerability in ViaBTC’s, the fourth largest Bitcoin mining pool, SPV mining code that allowed a remote attacker to waste ViaBTC’s 60 EH/s hashrate by sending a si…

I noticed multiple ERROR: AcceptBlock: bad-witness-nonce-size errors in the debug log of my Bitcoin Core node.

OpenSats supported my work on Bitcoin in 2024 and 2025 with a Long-Term-Support grant.

This is a copy of the Q4 2023 work-log I sent to Spiral for my grant.

This blog post provides an overview of non-standard transactions that mining pools included in the last 117000 Bitcoin blocks.

To help improve partition resistance, a medium-term goal is to increase the number block relay connections a Bitcoin Core node has (see #28462).

My project, miningpool-observer, aims to detect when Bitcoin mining pools are not mining transactions they could have been mining.

The upcoming Bitcoin Core v26.0 release will include new experimental features like AssumeUTXO and P2P transport v2.

This is a copy of the Q3 2023 work-log I sent to Spiral for my grant.

I held a workshop about “Writing a NixOS module for YOUR_APP”.

Instructions for my Writing a NixOS Module for your_app workshop.

Notes on the invalid Bitcoin mainnet block at height 809478 mined by experimental, in-house MARAPool mining pool software on September 27, 2023.

The MIT DCI supported my peer-observer project with six monitoring Bitcoin nodes for 1.5 years.

This year, the Bitcoin Core project will have its 13th anniversary being hosted on GitHub. 13 years of issues and pull requests with critical design decisions and nuanced discussions hosted with a US-based company known for shutting down open-source softw…