Why Compact Blocks Can't Compress Unknown Transactions
Compact blocks cut bandwidth by sending transaction IDs, not full data. But that shortcut breaks the moment a peer hasn't seen the transaction before.
№ 002BitcoinBitcoin Erlay vs INV Relay: Propagation Compared
Erlay swaps Bitcoin's INV flood for set reconciliation via PinSketch, cutting relay bandwidth ~40%. The mechanism, the math, and the real tradeoffs.