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//! Specifying protocol versions
//!
//! Protocol versions identify the protocol clients use to speak to the server.
//!
/// Version of the initial mainnet release
pub const PROTOCOL_VERSION_BASE: u64 = 1;
/// Version that has the offboard sighash for multi-input offboards fixed
pub const PROTOCOL_VERSION_OFFBOARD_FIX: u64 = 2;
/// Version that checkpoints the lightning-receive claim.
///
/// A checkpoint gives the watchman a stopping point: if the parent (HTLC-recv)
/// VTXO is dragged on-chain, the watchman broadcasts the checkpoint instead of
/// progressing all the way to the claimed leaf and force-exiting it. Clients on
/// this version build the claim with checkpoints and the server requires it.
pub const PROTOCOL_VERSION_LN_RECEIVE_CHECKPOINT: u64 = 3;
/// Version that rounds ppm fees up to a satoshi instead of down and
/// calculates ppm expiry fees on the exact total across all VTXOs rather
/// than per VTXO.
pub const PROTOCOL_VERSION_PPM_FEE_TOTAL: u64 = 4;
/// Version that forces clients to send their (unsigned) funding tx for boarding
pub const PROTOCOL_VERSION_BOARD_FUNDING_TX: u64 = 4;
/// Version that introduces the new hashlock clause scripts, which add a
/// preimage size check.
///
/// This covers the new `ServerHtlcRecv` and `ServerHtlcSend` policies for
/// Lightning, as well as the new `HarkLeaf` and `HarkForfeit` policies and
/// the new `HashLockedCosigned` genesis transition used in rounds.
///
/// Old clients cannot parse the new policies' encoding and build the old
/// scripts, so the server rejects Lightning sends and receives and round
/// participations from clients below this version with an upgrade error.
pub const PROTOCOL_VERSION_HASHLOCK_CLAUSES: u64 = 5;