Bitcoin Node Security: Outbound vs Inbound Connections
Bitcoin Core trusts outbound connections more than inbound, and for precise reasons. The security logic behind that asymmetry, explained for node operators.
№ 026BitcoinBitcoin's Script Version Byte and Soft Fork Upgrades
Bitcoin's one-byte witness version field lets soft forks add new spending rules without invalidating old wallets or splitting the chain.
№ 027BitcoinBitcoin Full Node Economics: A Ten-Year Breakdown
Hardware, bandwidth, and opportunity costs all shape whether running a full Bitcoin node makes financial sense. The arithmetic, read straight.
№ 028BitcoinBitcoin Coin Selection: Fees, UTXOs, and Wallet Algorithms
Coin selection algorithms quietly determine your transaction fees and UTXO bloat. This piece breaks down Branch and Bound, dust, and consolidation strategy.
№ 029BitcoinBitcoin Timelocked Multisig for Inheritance Planning
Timelocked multisig scripts can serve as a Bitcoin dead-man's switch. Here are the mechanics, the design tradeoffs, and the failure modes.
№ 030BitcoinBitcoin Compact Filters: Private Light Client Sync
BIP 157/158 compact filters let Bitcoin light clients verify transactions locally without exposing addresses to any full node. The mechanism, plainly explained.
№ 031BitcoinBitcoin Anti-Fee-Sniping: Mechanism and Miner Incentives
Anti-fee-sniping uses nLocktime to make block reorgs unprofitable. Learn the exact mechanism, the privacy tradeoff, and why it matters more each halving.
№ 032BitcoinLightning Node Routing Revenue: The Real Net Math
Channel open/close costs and rebalancing fees routinely exceed routing income. A breakdown of the full cost structure most node dashboards hide.
№ 033BitcoinBitcoin SPV Bloom Filters and the Privacy Leak
SPV bloom filters were designed to obscure your addresses from nodes, the intersection attack math shows why they don't, and what actually works instead.
№ 034BitcoinBitcoin Script Has No Loops: Security by Design
Bitcoin Script omits loops entirely, not as a limitation, but as a deliberate defense against Denial-of-Service attacks on every node in the network.
№ 035BitcoinBIP-32 HD Wallets: How Key Derivation Actually Works
BIP-32 derives millions of Bitcoin keys from one seed without exposing the root. The exact mechanism, the hardening tradeoff, and where the real risks sit.
№ 036BitcoinBitcoin Halving Explained: The Code That Slows New Coin Supply
Every four years, Bitcoin cuts its mining reward in half. Here's what that actually means for supply, miners, and the 21 million cap, without the price hype.