Merkle root over block hashes 0..tip (Electrum cp_height convention, bitcoin-style pairing with odd-node self-duplication). Run once over a fully synced chain to derive roots you then pin via SyncOptions.checkpoint.
Merkle root over block hashes 0..tip (Electrum cp_height convention, bitcoin-style pairing with odd-node self-duplication). Run once over a fully synced chain to derive roots you then pin via SyncOptions.checkpoint.