Bitcoin Anchor Outputs: Fee Bumping Presigned Transactions
Anchor outputs let channel parties bump fees on presigned Bitcoin transactions at broadcast time, the mechanism, the carve-out policy, and its real limits.
№ 014BitcoinBitcoin UTXO Set Growth and the Cost of Pruned Nodes
The UTXO set grows with every block and pruning cannot touch it. A look at the mechanics, the real numbers, and the long-term cost for node operators.
№ 015BitcoinBitcoin Median Time Past: Block Timestamp Manipulation
Median Time Past prevents miners from faking Bitcoin block timestamps. The exact mechanic, its real limits, and what a 15% miner actually controls.
№ 016BitcoinBitcoin Taproot Leaf Version: Future-Proofing Scripts
The leaf version field reserves space for new Bitcoin script rules without a hard fork, the exact mechanism, the constraints, and what it enables.
№ 017EthereumEthereum Casper FFG: The Two-Thirds Finality Threshold
Casper FFG requires a two-thirds stake supermajority to finalize checkpoints. The mechanic, the math behind the threshold, and what breaks when it fails.
№ 018DeFiDeFi Borrow Rate Curves: Utilization-Based Pricing Explained
Decentralized lending protocols price credit from one internal ratio, utilization. Full mechanics, the kinked curve, and a worked example with real numbers.
№ 019BitcoinBitcoin Sighash Preimage: Input Values and Fee Theft
BIP143 bakes input values into the sighash preimage, making fee-theft via value misrepresentation cryptographically impossible. Mechanism and worked example.
№ 020EthereumEthereum Validators: BLS Aggregation Limits and Scaling
BLS signatures cut verification cost near-constant, but aggregation routing scales with validator count. The mechanics, tradeoffs, and what breaks first.
№ 021BitcoinTaproot On-Chain: Keypath vs Scriptpath Spending
A Taproot output looks uniform until it's spent. The witness field reveals exactly which path was taken, and how much it exposes about your setup.
№ 022BitcoinBitcoin Miniscript Satisfier Algorithm Explained
Miniscript's satisfier finds the cheapest non-malleable witness across all valid spending paths. Worked example, malleability rules, and fee impact.
№ 023BitcoinBitcoin Covenants: Introspection vs Template Approaches
Bitcoin's covenant debate splits on one question: how much can a script inspect its own transaction? A clear breakdown of both camps.
№ 024EthereumEIP-7251 Validator Consolidation and Voting Power
EIP-7251 raises Ethereum's validator cap to 2,048 ETH, reshaping stake-weighted voting power, compounding rewards, and who actually carries the slashing risk.