Most bitcoin users never think about fee sniping; a scenario where a miner tries to re‑mine a recently mined block to capture the transaction fees inside it.
To reduce the incentive for this, many wallets set a locktime, which helps ensure transactions are only valid for the next block.
But this protective behavior has an unintended side effect: it can create patterns that make some transactions easier to identify on the blockchain.
In our latest blog, Abiodun Awoyemi dives into BIP326, a proposal that improves privacy for Taproot wallets without requiring any change to the Bitcoin protocol.
The idea is simple: instead of always using nLockTime for anti‑fee‑sniping protection, wallets can sometimes use nSequence instead.
Many off‑chain protocols like the Lightning Network⚡ already use nSequence for timelocks. If regular wallets also start using it, transactions that settle from off‑chain systems will blend in with everyday on‑chain activity. That makes it much harder for blockchain analysts to distinguish between the two.
The result is a larger anonymity set, better privacy, and stronger fungibility for Bitcoin users.
Abiodun walks through the mechanics behind locktimes, Taproot and MAST, why HTLC‑based systems leak information, and how BIP326 helps close that privacy gap, all the way down to a practical Rust implementation.
If you’re curious about how a small wallet behavior change can strengthen privacy across the Bitcoin ecosystem, this is a great deep dive.
Read the full blog to learn more: 
Btrust Blog
BIP326: Anti-Fee-Sniping as a Privacy Primitive for Taproot Wallets
Written by Abiodun Awoyemi
Table of Contents
1. Introduction to BIP326
2. Locktime Fundamentals: nLockTime vs nSequence
3. Fee Sniping: T...
