ZIP: 254
Title: Deployment of the NU7 Network Upgrade
Owners: Arya <arya@zfnd.org>
Status: Draft
Category: Consensus / Network
Created: 2024-10-31
License: MIT
Discussions-To: <https://github.com/zcash/zips/issues/839>The key word “MUST” in this document are to be interpreted as described in BCP 14 1 when, and only when, they appear in all capitals.
The term “network upgrade” in this document is to be interpreted as described in ZIP 200 2.
The terms “Testnet” and “Mainnet” are to be interpreted as described in section 3.12 of the Zcash Protocol Specification 3.
This proposal defines the deployment of the NU7 network upgrade.
The primary sources of information about NU7 consensus protocol changes are:
The network handshake and peer management mechanisms defined in ZIP 201 6 also apply to this upgrade.
The following network upgrade constants 7 are defined for the NU7 upgrade:
0x77190AD8
170130
170140
For each network (Testnet and Mainnet), nodes compatible with NU7 activation on that network MUST advertise a network protocol version that is greater than or equal to the MIN_NETWORK_PROTOCOL_VERSION (NU7) for that activation.
Prior to the network upgrade activating on each network, NU7 and pre-NU7 nodes are compatible and can connect to each other. However, NU7 nodes will have a preference for connecting to other NU7 nodes, so pre-NU7 nodes will gradually be disconnected in the run up to activation.
Once the network upgrades, even though pre-NU7 nodes can still accept the numerically larger protocol version used by NU7 as being valid, NU7 nodes will always disconnect peers using lower protocol versions.