The Frontier

Adam developed Babylonia to address standard CoinJoin vulnerabilities, where change outputs are easily linked to inputs via subset sum analysis. Babylonia uses probabilistic payments to obscure exact transaction amounts and break ownership heuristics.

Adam traces the concept of statistical micropayments to a 1997 paper by Ron Rivest proposing lottery-style digital cash payments. Later, Tadge Dryja proposed probabilistic payments for Lightning to economically handle sub-satoshi transactions.

Babylonia utilizes adapter signatures and zero-knowledge proofs to let parties execute a trustless, on-chain bet that reveals outcomes atomically. To prevent amount correlation, Adam updated the protocol to split single bets into multiple secret, unequal portions.

Silent payments preserve receiver privacy but require scanning every block transaction. Rob explains that lite clients must choose between trusting an index server with their scan key or downloading heavy block filters to detect payments locally.

Rob analyzed all 255,000 blocks mined since the Taproot activation to measure silent payment client bandwidth. Downloading full block payloads requires 15 gigs compared to 7 gigs for taproot-only block filters, representing a two-fold difference.

LDK release candidate 0.3 makes anchor channels the default and enables RBF fee-bumping for pending splices. LDK stable release 0.2.6 addresses a crash bug involving duplicate HTLCs and a security flaw where peers could siphon channel fees.

BTC Pay Server version 2.4.4 hardens security by completely removing legacy BitPay-style API keys. It also migrates to hashing API keys in database storage and eliminates plaintext API secrets from management page URLs to prevent history logging.

Merch notes that Bitcoin Core PR 35949 builds block templates compliant with BIP 54 to prevent the Merch-Zavi time warp attack. PR 34931 separates database deserialization failures from non-existent UTXOs to prevent accidental chain splits.

Bitcoin Core PR 36123 introduces TCP backpressure to fix an HTTP server denial-of-service vulnerability. Additionally, a separate wallet notify vulnerability was resolved by escaping wallet names to prevent malicious users from executing arbitrary code.

LND PR 11061 implements Schnorr signature verification for Bolt 12 offers. Core Lightning PRs 9434 and 9473 resolve critical crash bugs in the Askrene routing engine plugin related to loading and deleting routing biases.

LND PR 11125 introduces robust UTXO locking that survives blockchain reorgs until a target confirmation count is reached. LND PR 11064 requires explicit channel type signaling during channel openings to strictly comply with specifications.

BTC Pay Server PR 7559 expands the Lightning payment monitoring window to match the on-chain window. This prevents merchants from manually reconciling Lightning payments that occur slightly after the standard payment deadline.