add(consensus): Add `activation_heights` field to `NetworkParameters` and implement `Parameters` for `Network` (#8383)

* minor cleanup and rename

* Adds an empty NetworkParameters struct to Network::Testnet variant, updates production code.

* Updates tests

* Adds `NetworkKind` and uses it instead of `Network` in `HistoryTreeParts` and `transparent::Address`

* Adds a [network.testnet_parameters] section to the config, uses `NetworkKind` as zebra_network::Config::network field type, and converts 'Network' to `NetworkKind` before serializing

* Applies some suggestions from code review

* Applies suggestions from code review

* returns b58 prefix constants directly to remove From<NetworkKind> impl for zcash_primitives::consensus::Network

* Applies more suggestions from code review.

* moves conversions to zcash_primitives::consensus::Network to where they're used.

* Apply suggestions from code review

Co-authored-by: Marek <mail@marek.onl>

* rename `network` variables and method names typed as NetworkKind to `network_kind`

* use only test block heights for the network associated with them

* Applies more suggestions from code review.

* Rename `NetworkParameters` to `Parameters` and move it a new `testnet` module

* adds activation heights field

* updates stored test config, adds a quicker test for checking that stored configs can be parsed, adds an intermediate representation of activation heights

* implement Parameters for Network

* Passes &Network directly instead of converting to zp_consensus::Network where there were conversions

* fixes a bad merge (removes a network conversion in zcash_note_encryption)

* Adds a test for the Parameters impl for zebra_chain::Network

* fixes doc links

* - Makes the `activation_heights` config field optional by adding a #[serde(default)]
- Panics if a non-zero activation height is provided for the `Genesis` network upgrade
- Always sets the `Genesis` and `BeforeOverwinter` network upgrade activation heights to 0 and 1, `BeforeOverwinter` could be overwritten by a later network upgrade
- Makes the `activation_heights` field on `Parameters` private, adds/uses an accessor method instead, and adds a builder struct and `build()` method

* small refactor of activation_heights() method

* check that activation heights are in the right order

* Updates `NetworkUpgrade::activation_height()` to return the height of the next NetworkUpgrade if it doesn't find the activation height of `&self`

* checks that the miner address is of TestnetKind on Regtest and update assertion message

* Adds a DNetworkUpgradeActivationHeights struct for better control over how activation heights can be configured

* moves all ordered network upgrades to a constant, adds a no_duplicates test, moves struct with activation heights outside deserialization impl and accepts it in `ParametersBuilder::activation_heights()` instead of a Vec

* panics if any network upgrades are configured to activate at Height(0) because it's reserved for Genesis

* Simplifies the `ParametersBuilder::activation_heights()` method and removes an unnecessary test.

* Adds Sapling HRPs as fields on testnet params. (#8398)

* Applies suggestions from code review.

* Update zebra-chain/src/parameters/network_upgrade.rs

Co-authored-by: Marek <mail@marek.onl>

---------

Co-authored-by: Marek <mail@marek.onl>

zebra-chain/src/parameters/arbitrary.rs

@@ -2,7 +2,7 @@
 
 use proptest::prelude::*;
 
-use super::NetworkUpgrade;
+use super::{Network, NetworkUpgrade};
 
 impl NetworkUpgrade {
     /// Generates network upgrades.
@@ -32,3 +32,13 @@ impl NetworkUpgrade {
         .boxed()
     }
 }
+
+impl Arbitrary for Network {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: ()) -> Self::Strategy {
+        prop_oneof![Just(Self::Mainnet), Just(Self::new_default_testnet())].boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}

zebra-chain/src/parameters/network.rs

@@ -4,18 +4,15 @@ use std::{fmt, str::FromStr, sync::Arc};
 
 use thiserror::Error;
 
-use zcash_primitives::constants;
+use zcash_primitives::{consensus as zp_consensus, constants as zp_constants};
 
 use crate::{
     block::{self, Height, HeightDiff},
-    parameters::NetworkUpgrade::Canopy,
+    parameters::NetworkUpgrade,
 };
 
 pub mod testnet;
 
-#[cfg(any(test, feature = "proptest-impl"))]
-use proptest_derive::Arbitrary;
-
 #[cfg(test)]
 mod tests;
 
@@ -81,7 +78,6 @@ impl From<Network> for NetworkKind {
 
 /// An enum describing the possible network choices.
 #[derive(Clone, Debug, Default, Eq, PartialEq, Hash, Serialize)]
-#[cfg_attr(any(test, feature = "proptest-impl"), derive(Arbitrary))]
 #[serde(into = "NetworkKind")]
 pub enum Network {
     /// The production mainnet.
@@ -98,8 +94,8 @@ impl NetworkKind {
     /// pay-to-public-key-hash payment addresses for the network.
     pub fn b58_pubkey_address_prefix(self) -> [u8; 2] {
         match self {
-            Self::Mainnet => constants::mainnet::B58_PUBKEY_ADDRESS_PREFIX,
-            Self::Testnet | Self::Regtest => constants::testnet::B58_PUBKEY_ADDRESS_PREFIX,
+            Self::Mainnet => zp_constants::mainnet::B58_PUBKEY_ADDRESS_PREFIX,
+            Self::Testnet | Self::Regtest => zp_constants::testnet::B58_PUBKEY_ADDRESS_PREFIX,
         }
     }
 
@@ -107,8 +103,8 @@ impl NetworkKind {
     /// payment addresses for the network.
     pub fn b58_script_address_prefix(self) -> [u8; 2] {
         match self {
-            Self::Mainnet => constants::mainnet::B58_SCRIPT_ADDRESS_PREFIX,
-            Self::Testnet | Self::Regtest => constants::testnet::B58_SCRIPT_ADDRESS_PREFIX,
+            Self::Mainnet => zp_constants::mainnet::B58_SCRIPT_ADDRESS_PREFIX,
+            Self::Testnet | Self::Regtest => zp_constants::testnet::B58_SCRIPT_ADDRESS_PREFIX,
         }
     }
 
@@ -231,7 +227,7 @@ impl Network {
         //
         // See the `ZIP_212_GRACE_PERIOD_DURATION` documentation for more information.
 
-        let canopy_activation = Canopy
+        let canopy_activation = NetworkUpgrade::Canopy
             .activation_height(self)
             .expect("Canopy activation height must be present for both networks");
 
@@ -279,3 +275,70 @@ impl FromStr for Network {
 #[derive(Clone, Debug, Error)]
 #[error("Invalid network: {0}")]
 pub struct InvalidNetworkError(String);
+
+impl zp_consensus::Parameters for Network {
+    fn activation_height(
+        &self,
+        nu: zcash_primitives::consensus::NetworkUpgrade,
+    ) -> Option<zcash_primitives::consensus::BlockHeight> {
+        let target_nu = match nu {
+            zp_consensus::NetworkUpgrade::Overwinter => NetworkUpgrade::Overwinter,
+            zp_consensus::NetworkUpgrade::Sapling => NetworkUpgrade::Sapling,
+            zp_consensus::NetworkUpgrade::Blossom => NetworkUpgrade::Blossom,
+            zp_consensus::NetworkUpgrade::Heartwood => NetworkUpgrade::Heartwood,
+            zp_consensus::NetworkUpgrade::Canopy => NetworkUpgrade::Canopy,
+            zp_consensus::NetworkUpgrade::Nu5 => NetworkUpgrade::Nu5,
+        };
+
+        // Heights are hard-coded below Height::MAX or checked when the config is parsed.
+        target_nu
+            .activation_height(self)
+            .map(|Height(h)| zp_consensus::BlockHeight::from_u32(h))
+    }
+
+    fn coin_type(&self) -> u32 {
+        match self {
+            Network::Mainnet => zp_constants::mainnet::COIN_TYPE,
+            // The regtest cointype reuses the testnet cointype,
+            // See <https://github.com/satoshilabs/slips/blob/master/slip-0044.md>
+            Network::Testnet(_) => zp_constants::testnet::COIN_TYPE,
+        }
+    }
+
+    fn address_network(&self) -> Option<zcash_address::Network> {
+        match self {
+            Network::Mainnet => Some(zcash_address::Network::Main),
+            // TODO: Check if network is `Regtest` first, and if it is, return `zcash_address::Network::Regtest`
+            Network::Testnet(_params) => Some(zcash_address::Network::Test),
+        }
+    }
+
+    fn hrp_sapling_extended_spending_key(&self) -> &str {
+        match self {
+            Network::Mainnet => zp_constants::mainnet::HRP_SAPLING_EXTENDED_SPENDING_KEY,
+            Network::Testnet(params) => params.hrp_sapling_extended_spending_key(),
+        }
+    }
+
+    fn hrp_sapling_extended_full_viewing_key(&self) -> &str {
+        match self {
+            Network::Mainnet => zp_constants::mainnet::HRP_SAPLING_EXTENDED_FULL_VIEWING_KEY,
+            Network::Testnet(params) => params.hrp_sapling_extended_full_viewing_key(),
+        }
+    }
+
+    fn hrp_sapling_payment_address(&self) -> &str {
+        match self {
+            Network::Mainnet => zp_constants::mainnet::HRP_SAPLING_PAYMENT_ADDRESS,
+            Network::Testnet(params) => params.hrp_sapling_payment_address(),
+        }
+    }
+
+    fn b58_pubkey_address_prefix(&self) -> [u8; 2] {
+        self.kind().b58_pubkey_address_prefix()
+    }
+
+    fn b58_script_address_prefix(&self) -> [u8; 2] {
+        self.kind().b58_script_address_prefix()
+    }
+}

zebra-chain/src/parameters/network/testnet.rs

@@ -1,16 +1,220 @@
 //! Types and implementation for Testnet consensus parameters
+use std::collections::BTreeMap;
 
-#[cfg(any(test, feature = "proptest-impl"))]
-use proptest_derive::Arbitrary;
+use zcash_primitives::constants as zp_constants;
+
+use crate::{
+    block::Height,
+    parameters::{
+        network_upgrade::TESTNET_ACTIVATION_HEIGHTS, Network, NetworkUpgrade,
+        NETWORK_UPGRADES_IN_ORDER,
+    },
+};
+
+/// Configurable activation heights for Regtest and configured Testnets.
+#[derive(Deserialize, Default)]
+#[serde(rename_all = "PascalCase")]
+pub struct ConfiguredActivationHeights {
+    /// Activation height for `BeforeOverwinter` network upgrade.
+    pub before_overwinter: Option<u32>,
+    /// Activation height for `Overwinter` network upgrade.
+    pub overwinter: Option<u32>,
+    /// Activation height for `Sapling` network upgrade.
+    pub sapling: Option<u32>,
+    /// Activation height for `Blossom` network upgrade.
+    pub blossom: Option<u32>,
+    /// Activation height for `Heartwood` network upgrade.
+    pub heartwood: Option<u32>,
+    /// Activation height for `Canopy` network upgrade.
+    pub canopy: Option<u32>,
+    /// Activation height for `NU5` network upgrade.
+    #[serde(rename = "NU5")]
+    pub nu5: Option<u32>,
+}
+
+/// Builder for the [`Parameters`] struct.
+#[derive(Clone, Debug, Eq, PartialEq, Hash, Serialize, Deserialize)]
+pub struct ParametersBuilder {
+    /// The network upgrade activation heights for this network, see [`Parameters::activation_heights`] for more details.
+    activation_heights: BTreeMap<Height, NetworkUpgrade>,
+    /// Sapling extended spending key human-readable prefix for this network
+    hrp_sapling_extended_spending_key: String,
+    /// Sapling extended full viewing key human-readable prefix for this network
+    hrp_sapling_extended_full_viewing_key: String,
+    /// Sapling payment address human-readable prefix for this network
+    hrp_sapling_payment_address: String,
+}
+
+impl Default for ParametersBuilder {
+    fn default() -> Self {
+        Self {
+            // # Correctness
+            //
+            // `Genesis` network upgrade activation height must always be 0
+            activation_heights: [
+                (Height(0), NetworkUpgrade::Genesis),
+                // TODO: Find out if `BeforeOverwinter` must always be active at Height(1), remove it here if it's not required.
+                (Height(1), NetworkUpgrade::BeforeOverwinter),
+            ]
+            .into_iter()
+            .collect(),
+            hrp_sapling_extended_spending_key:
+                zp_constants::testnet::HRP_SAPLING_EXTENDED_SPENDING_KEY.to_string(),
+            hrp_sapling_extended_full_viewing_key:
+                zp_constants::testnet::HRP_SAPLING_EXTENDED_FULL_VIEWING_KEY.to_string(),
+            hrp_sapling_payment_address: zp_constants::testnet::HRP_SAPLING_PAYMENT_ADDRESS
+                .to_string(),
+        }
+    }
+}
+
+impl ParametersBuilder {
+    /// Checks that the provided network upgrade activation heights are in the correct order, then
+    /// sets them as the new network upgrade activation heights.
+    pub fn activation_heights(
+        mut self,
+        ConfiguredActivationHeights {
+            // TODO: Find out if `BeforeOverwinter` is required at Height(1), allow for
+            //       configuring its activation height if it's not required to be at Height(1)
+            before_overwinter: _,
+            overwinter,
+            sapling,
+            blossom,
+            heartwood,
+            canopy,
+            nu5,
+        }: ConfiguredActivationHeights,
+    ) -> Self {
+        use NetworkUpgrade::*;
+
+        // # Correctness
+        //
+        // These must be in order so that later network upgrades overwrite prior ones
+        // if multiple network upgrades are configured with the same activation height.
+        let activation_heights: BTreeMap<_, _> = overwinter
+            .into_iter()
+            .map(|h| (h, Overwinter))
+            .chain(sapling.into_iter().map(|h| (h, Sapling)))
+            .chain(blossom.into_iter().map(|h| (h, Blossom)))
+            .chain(heartwood.into_iter().map(|h| (h, Heartwood)))
+            .chain(canopy.into_iter().map(|h| (h, Canopy)))
+            .chain(nu5.into_iter().map(|h| (h, Nu5)))
+            .filter(|&(_, nu)| nu != NetworkUpgrade::BeforeOverwinter)
+            .map(|(h, nu)| (h.try_into().expect("activation height must be valid"), nu))
+            .collect();
+
+        let network_upgrades: Vec<_> = activation_heights.iter().map(|(_h, &nu)| nu).collect();
+
+        // Check that the provided network upgrade activation heights are in the same order by height as the default testnet activation heights
+        let mut activation_heights_iter = activation_heights.iter();
+        for expected_network_upgrade in NETWORK_UPGRADES_IN_ORDER {
+            if !network_upgrades.contains(&expected_network_upgrade) {
+                continue;
+            } else if let Some((&height, &network_upgrade)) = activation_heights_iter.next() {
+                assert_ne!(
+                    height,
+                    Height(0),
+                    "Height(0) is reserved for the `Genesis` upgrade"
+                );
+
+                assert!(
+                    network_upgrade == expected_network_upgrade,
+                    "network upgrades must be activated in order, the correct order is {NETWORK_UPGRADES_IN_ORDER:?}"
+                );
+            }
+        }
+
+        // # Correctness
+        //
+        // Height(0) must be reserved for the `NetworkUpgrade::Genesis`.
+        self.activation_heights.split_off(&Height(2));
+        self.activation_heights.extend(activation_heights);
+
+        self
+    }
+
+    /// Converts the builder to a [`Parameters`] struct
+    pub fn finish(self) -> Parameters {
+        let Self {
+            activation_heights,
+            hrp_sapling_extended_spending_key,
+            hrp_sapling_extended_full_viewing_key,
+            hrp_sapling_payment_address,
+        } = self;
+        Parameters {
+            activation_heights,
+            hrp_sapling_extended_spending_key,
+            hrp_sapling_extended_full_viewing_key,
+            hrp_sapling_payment_address,
+        }
+    }
+
+    /// Converts the builder to a configured [`Network::Testnet`]
+    pub fn to_network(self) -> Network {
+        Network::new_configured_testnet(self.finish())
+    }
+}
 
 /// Network consensus parameters for test networks such as Regtest and the default Testnet.
-#[derive(Clone, Debug, Default, Eq, PartialEq, Hash, Serialize, Deserialize)]
-#[cfg_attr(any(test, feature = "proptest-impl"), derive(Arbitrary))]
-pub struct Parameters {}
+#[derive(Clone, Debug, Eq, PartialEq, Hash, Serialize, Deserialize)]
+pub struct Parameters {
+    /// The network upgrade activation heights for this network.
+    ///
+    /// Note: This value is ignored by `Network::activation_list()` when `zebra-chain` is
+    ///       compiled with the `zebra-test` feature flag AND the `TEST_FAKE_ACTIVATION_HEIGHTS`
+    ///       environment variable is set.
+    activation_heights: BTreeMap<Height, NetworkUpgrade>,
+    /// Sapling extended spending key human-readable prefix for this network
+    hrp_sapling_extended_spending_key: String,
+    /// Sapling extended full viewing key human-readable prefix for this network
+    hrp_sapling_extended_full_viewing_key: String,
+    /// Sapling payment address human-readable prefix for this network
+    hrp_sapling_payment_address: String,
+}
+
+impl Default for Parameters {
+    /// Returns an instance of the default public testnet [`Parameters`].
+    fn default() -> Self {
+        Self {
+            activation_heights: TESTNET_ACTIVATION_HEIGHTS.iter().cloned().collect(),
+            hrp_sapling_extended_spending_key:
+                zp_constants::testnet::HRP_SAPLING_EXTENDED_SPENDING_KEY.to_string(),
+            hrp_sapling_extended_full_viewing_key:
+                zp_constants::testnet::HRP_SAPLING_EXTENDED_FULL_VIEWING_KEY.to_string(),
+            hrp_sapling_payment_address: zp_constants::testnet::HRP_SAPLING_PAYMENT_ADDRESS
+                .to_string(),
+        }
+    }
+}
 
 impl Parameters {
+    /// Creates a new [`ParametersBuilder`].
+    pub fn build() -> ParametersBuilder {
+        ParametersBuilder::default()
+    }
+
     /// Returns true if the instance of [`Parameters`] represents the default public Testnet.
     pub fn is_default_testnet(&self) -> bool {
         self == &Self::default()
     }
+
+    /// Returns the network upgrade activation heights
+    pub fn activation_heights(&self) -> &BTreeMap<Height, NetworkUpgrade> {
+        &self.activation_heights
+    }
+
+    /// Returns the `hrp_sapling_extended_spending_key` field
+    pub fn hrp_sapling_extended_spending_key(&self) -> &str {
+        &self.hrp_sapling_extended_spending_key
+    }
+
+    /// Returns the `hrp_sapling_extended_full_viewing_key` field
+    pub fn hrp_sapling_extended_full_viewing_key(&self) -> &str {
+        &self.hrp_sapling_extended_full_viewing_key
+    }
+
+    /// Returns the `hrp_sapling_payment_address` field
+    pub fn hrp_sapling_payment_address(&self) -> &str {
+        &self.hrp_sapling_payment_address
+    }
 }

zebra-chain/src/parameters/network/tests.rs

@@ -1 +1,2 @@
 mod prop;
+mod vectors;

zebra-chain/src/parameters/network/tests/vectors.rs

@@ -0,0 +1,127 @@
+//! Fixed test vectors for the network consensus parameters.
+
+use zcash_primitives::consensus::{self as zp_consensus, Parameters};
+
+use crate::{
+    block::Height,
+    parameters::{
+        testnet::{self, ConfiguredActivationHeights},
+        Network, NetworkUpgrade, NETWORK_UPGRADES_IN_ORDER,
+    },
+};
+
+/// Checks that every method in the `Parameters` impl for `zebra_chain::Network` has the same output
+/// as the Parameters impl for `zcash_primitives::consensus::Network` on Mainnet and the default Testnet.
+#[test]
+fn check_parameters_impl() {
+    let zp_network_upgrades = [
+        zp_consensus::NetworkUpgrade::Overwinter,
+        zp_consensus::NetworkUpgrade::Sapling,
+        zp_consensus::NetworkUpgrade::Blossom,
+        zp_consensus::NetworkUpgrade::Heartwood,
+        zp_consensus::NetworkUpgrade::Canopy,
+        zp_consensus::NetworkUpgrade::Nu5,
+    ];
+
+    for (network, zp_network) in [
+        (Network::Mainnet, zp_consensus::Network::MainNetwork),
+        (
+            Network::new_default_testnet(),
+            zp_consensus::Network::TestNetwork,
+        ),
+    ] {
+        for nu in zp_network_upgrades {
+            let activation_height = network
+                .activation_height(nu)
+                .expect("must have activation height for past network upgrades");
+
+            assert_eq!(
+                activation_height,
+                zp_network
+                    .activation_height(nu)
+                    .expect("must have activation height for past network upgrades"),
+                "Parameters::activation_heights() outputs must match"
+            );
+
+            let activation_height: u32 = activation_height.into();
+
+            for height in (activation_height - 1)..=(activation_height + 1) {
+                for nu in zp_network_upgrades {
+                    let height = zp_consensus::BlockHeight::from_u32(height);
+                    assert_eq!(
+                        network.is_nu_active(nu, height),
+                        zp_network.is_nu_active(nu, height),
+                        "Parameters::is_nu_active() outputs must match",
+                    );
+                }
+            }
+        }
+
+        assert_eq!(
+            network.coin_type(),
+            zp_network.coin_type(),
+            "Parameters::coin_type() outputs must match"
+        );
+        assert_eq!(
+            network.hrp_sapling_extended_spending_key(),
+            zp_network.hrp_sapling_extended_spending_key(),
+            "Parameters::hrp_sapling_extended_spending_key() outputs must match"
+        );
+        assert_eq!(
+            network.hrp_sapling_extended_full_viewing_key(),
+            zp_network.hrp_sapling_extended_full_viewing_key(),
+            "Parameters::hrp_sapling_extended_full_viewing_key() outputs must match"
+        );
+        assert_eq!(
+            network.hrp_sapling_payment_address(),
+            zp_network.hrp_sapling_payment_address(),
+            "Parameters::hrp_sapling_payment_address() outputs must match"
+        );
+        assert_eq!(
+            network.b58_pubkey_address_prefix(),
+            zp_network.b58_pubkey_address_prefix(),
+            "Parameters::b58_pubkey_address_prefix() outputs must match"
+        );
+        assert_eq!(
+            network.b58_script_address_prefix(),
+            zp_network.b58_script_address_prefix(),
+            "Parameters::b58_script_address_prefix() outputs must match"
+        );
+    }
+}
+
+/// Checks that `NetworkUpgrade::activation_height()` returns the activation height of the next
+/// network upgrade if it doesn't find an activation height for a prior network upgrade, and that the
+/// `Genesis` upgrade is always at `Height(0)`.
+#[test]
+fn activates_network_upgrades_correctly() {
+    let expected_activation_height = 1;
+    let network = testnet::Parameters::build()
+        .activation_heights(ConfiguredActivationHeights {
+            nu5: Some(expected_activation_height),
+            ..Default::default()
+        })
+        .to_network();
+
+    let genesis_activation_height = NetworkUpgrade::Genesis
+        .activation_height(&network)
+        .expect("must return an activation height");
+
+    assert_eq!(
+        genesis_activation_height,
+        Height(0),
+        "activation height for all networks after Genesis and BeforeOverwinter should match NU5 activation height"
+    );
+
+    for nu in NETWORK_UPGRADES_IN_ORDER.into_iter().skip(1) {
+        let activation_height = nu
+            .activation_height(&network)
+            .expect("must return an activation height");
+
+        assert_eq!(
+            activation_height, Height(expected_activation_height),
+            "activation height for all networks after Genesis and BeforeOverwinter \
+            should match NU5 activation height, network_upgrade: {nu}, activation_height: {activation_height:?}"
+        );
+    }
+}

zebra-chain/src/parameters/network_upgrade.rs

@@ -7,7 +7,6 @@ use crate::parameters::{Network, Network::*};
 
 use std::collections::{BTreeMap, HashMap};
 use std::fmt;
-use std::ops::Bound::*;
 
 use chrono::{DateTime, Duration, Utc};
 use hex::{FromHex, ToHex};
@@ -15,6 +14,18 @@ use hex::{FromHex, ToHex};
 #[cfg(any(test, feature = "proptest-impl"))]
 use proptest_derive::Arbitrary;
 
+/// A list of network upgrades in the order that they must be activated.
+pub const NETWORK_UPGRADES_IN_ORDER: [NetworkUpgrade; 8] = [
+    Genesis,
+    BeforeOverwinter,
+    Overwinter,
+    Sapling,
+    Blossom,
+    Heartwood,
+    Canopy,
+    Nu5,
+];
+
 /// A Zcash network upgrade.
 ///
 /// Network upgrades can change the Zcash network protocol or consensus rules in
@@ -242,12 +253,7 @@ impl Network {
     /// and it's a test build, this returns a list of fake activation heights
     /// used by some tests.
     pub fn activation_list(&self) -> BTreeMap<block::Height, NetworkUpgrade> {
-        let (mainnet_heights, testnet_heights) = {
-            #[cfg(not(feature = "zebra-test"))]
-            {
-                (MAINNET_ACTIVATION_HEIGHTS, TESTNET_ACTIVATION_HEIGHTS)
-            }
-
+        match self {
             // To prevent accidentally setting this somehow, only check the env var
             // when being compiled for tests. We can't use cfg(test) since the
             // test that uses this is in zebra-state, and cfg(test) is not
@@ -260,25 +266,19 @@ impl Network {
             // feature should only be enabled for tests:
             // https://doc.rust-lang.org/cargo/reference/features.html#resolver-version-2-command-line-flags
             #[cfg(feature = "zebra-test")]
-            if std::env::var_os("TEST_FAKE_ACTIVATION_HEIGHTS").is_some() {
-                (
-                    FAKE_MAINNET_ACTIVATION_HEIGHTS,
-                    FAKE_TESTNET_ACTIVATION_HEIGHTS,
-                )
-            } else {
-                (MAINNET_ACTIVATION_HEIGHTS, TESTNET_ACTIVATION_HEIGHTS)
+            Mainnet if std::env::var_os("TEST_FAKE_ACTIVATION_HEIGHTS").is_some() => {
+                FAKE_MAINNET_ACTIVATION_HEIGHTS.iter().cloned().collect()
             }
-        };
-        match self {
-            Mainnet => mainnet_heights,
-            // TODO: Add an `activation_heights` field to `testnet::Parameters` to return here. (#7970)
-            Testnet(_params) => testnet_heights,
+            #[cfg(feature = "zebra-test")]
+            Testnet(_) if std::env::var_os("TEST_FAKE_ACTIVATION_HEIGHTS").is_some() => {
+                FAKE_TESTNET_ACTIVATION_HEIGHTS.iter().cloned().collect()
+            }
+            Mainnet => MAINNET_ACTIVATION_HEIGHTS.iter().cloned().collect(),
+            Testnet(params) => params.activation_heights().clone(),
         }
-        .iter()
-        .cloned()
-        .collect()
     }
 }
+
 impl NetworkUpgrade {
     /// Returns the current network upgrade for `network` and `height`.
     pub fn current(network: &Network, height: block::Height) -> NetworkUpgrade {
@@ -290,11 +290,28 @@ impl NetworkUpgrade {
             .expect("every height has a current network upgrade")
     }
 
+    /// Returns the next expected network upgrade after this network upgrade
+    pub fn next_upgrade(self) -> Option<Self> {
+        match self {
+            Genesis => Some(BeforeOverwinter),
+            BeforeOverwinter => Some(Overwinter),
+            Overwinter => Some(Sapling),
+            Sapling => Some(Blossom),
+            Blossom => Some(Heartwood),
+            Heartwood => Some(Canopy),
+            Canopy => Some(Nu5),
+            Nu5 => None,
+        }
+    }
+
     /// Returns the next network upgrade for `network` and `height`.
     ///
     /// Returns None if the next upgrade has not been implemented in Zebra
     /// yet.
+    #[cfg(test)]
     pub fn next(network: &Network, height: block::Height) -> Option<NetworkUpgrade> {
+        use std::ops::Bound::*;
+
         network
             .activation_list()
             .range((Excluded(height), Unbounded))
@@ -302,17 +319,27 @@ impl NetworkUpgrade {
             .next()
     }
 
-    /// Returns the activation height for this network upgrade on `network`.
+    /// Returns the activation height for this network upgrade on `network`, or
+    ///
+    /// Returns the activation height of the first network upgrade that follows
+    /// this network upgrade if there is no activation height for this network upgrade
+    /// such as on Regtest or a configured Testnet where multiple network upgrades have the
+    /// same activation height, or if one is omitted when others that follow it are included.
     ///
     /// Returns None if this network upgrade is a future upgrade, and its
     /// activation height has not been set yet.
+    ///
+    /// Returns None if this network upgrade has not been configured on a Testnet or Regtest.
     pub fn activation_height(&self, network: &Network) -> Option<block::Height> {
         network
             .activation_list()
             .iter()
-            .filter(|(_, nu)| nu == &self)
+            .find(|(_, nu)| nu == &self)
             .map(|(height, _)| *height)
-            .next()
+            .or_else(|| {
+                self.next_upgrade()
+                    .and_then(|next_nu| next_nu.activation_height(network))
+            })
     }
 
     /// Returns `true` if `height` is the activation height of any network upgrade

zebra-chain/src/primitives/zcash_note_encryption.rs

@@ -22,29 +22,11 @@ pub fn decrypts_successfully(transaction: &Transaction, network: &Network, heigh
 
     let alt_height = height.0.into();
     let null_sapling_ovk = zcash_primitives::keys::OutgoingViewingKey([0u8; 32]);
-    let network = match network {
-        Network::Mainnet => zcash_primitives::consensus::Network::MainNetwork,
-        Network::Testnet(params) => {
-            // # Correctness:
-            //
-            // There are differences between the `TestNetwork` parameters and those returned by
-            // `CRegTestParams()` in zcashd, so this function can't return `TestNetwork` unless
-            // Zebra is using the default public Testnet.
-            //
-            // TODO: Remove this conversion by implementing `zcash_primitives::consensus::Parameters`
-            //       for `Network` (#8365).
-            assert!(
-                params.is_default_testnet(),
-                "could not convert configured testnet to zcash_primitives::consensus::Network"
-            );
-            zcash_primitives::consensus::Network::TestNetwork
-        }
-    };
 
     if let Some(bundle) = alt_tx.sapling_bundle() {
         for output in bundle.shielded_outputs().iter() {
             let recovery = zcash_primitives::sapling::note_encryption::try_sapling_output_recovery(
-                &network,
+                network,
                 alt_height,
                 &null_sapling_ovk,
                 output,

zebra-network/src/config.rs

@@ -14,7 +14,10 @@ use tempfile::NamedTempFile;
 use tokio::{fs, io::AsyncWriteExt};
 use tracing::Span;
 
-use zebra_chain::parameters::{testnet, Network, NetworkKind};
+use zebra_chain::parameters::{
+    testnet::{self, ConfiguredActivationHeights},
+    Network, NetworkKind,
+};
 
 use crate::{
     constants::{
@@ -624,12 +627,18 @@ impl<'de> Deserialize<'de> for Config {
     where
         D: Deserializer<'de>,
     {
+        #[derive(Deserialize)]
+        struct DTestnetParameters {
+            #[serde(default)]
+            pub(super) activation_heights: ConfiguredActivationHeights,
+        }
+
         #[derive(Deserialize)]
         #[serde(deny_unknown_fields, default)]
         struct DConfig {
             listen_addr: String,
             network: NetworkKind,
-            testnet_parameters: Option<testnet::Parameters>,
+            testnet_parameters: Option<DTestnetParameters>,
             initial_mainnet_peers: IndexSet<String>,
             initial_testnet_peers: IndexSet<String>,
             cache_dir: CacheDir,
@@ -668,15 +677,17 @@ impl<'de> Deserialize<'de> for Config {
             max_connections_per_ip,
         } = DConfig::deserialize(deserializer)?;
 
-        let network = if let Some(network_params) = testnet_parameters {
-            // TODO: Panic here if the initial testnet peers are the default initial testnet peers.
+        // TODO: Panic here if the initial testnet peers are the default initial testnet peers.
+        let network = if let Some(DTestnetParameters { activation_heights }) = testnet_parameters {
             assert_eq!(
                 network_kind,
                 NetworkKind::Testnet,
                 "set network to 'Testnet' to use configured testnet parameters"
             );
 
-            Network::new_configured_testnet(network_params)
+            testnet::Parameters::build()
+                .activation_heights(activation_heights)
+                .to_network()
         } else {
             // Convert to default `Network` for a `NetworkKind` if there are no testnet parameters.
             match network_kind {

zebra-rpc/src/methods/get_block_template_rpcs.rs

@@ -14,7 +14,7 @@ use zebra_chain::{
     block::{self, Block, Height, TryIntoHeight},
     chain_sync_status::ChainSyncStatus,
     chain_tip::ChainTip,
-    parameters::{Network, POW_AVERAGING_WINDOW},
+    parameters::{Network, NetworkKind, POW_AVERAGING_WINDOW},
     primitives,
     serialization::ZcashDeserializeInto,
     transparent::{
@@ -449,13 +449,25 @@ where
     ) -> Self {
         // Prevent loss of miner funds due to an unsupported or incorrect address type.
         if let Some(miner_address) = mining_config.miner_address.clone() {
-            assert_eq!(
-                miner_address.network_kind(),
-                network.kind(),
-                "incorrect miner address config: {miner_address} \
-                         network.network {network} and miner address network {} must match",
-                miner_address.network_kind(),
-            );
+            match network.kind() {
+                NetworkKind::Mainnet => assert_eq!(
+                    miner_address.network_kind(),
+                    NetworkKind::Mainnet,
+                    "Incorrect config: Zebra is configured to run on a Mainnet network, \
+                    which implies the configured mining address needs to be for Mainnet, \
+                    but the provided address is for {}.",
+                    miner_address.network_kind(),
+                ),
+                // `Regtest` uses `Testnet` transparent addresses.
+                network_kind @ (NetworkKind::Testnet | NetworkKind::Regtest) => assert_eq!(
+                    miner_address.network_kind(),
+                    NetworkKind::Testnet,
+                    "Incorrect config: Zebra is configured to run on a {network_kind} network, \
+                    which implies the configured mining address needs to be for Testnet, \
+                    but the provided address is for {}.",
+                    miner_address.network_kind(),
+                ),
+            }
         }
 
         // A limit on the configured extra coinbase data, regardless of the current block height.

zebra-scan/src/service/scan_task/scan.rs

@@ -384,25 +384,6 @@ pub fn scan_block<K: ScanningKey>(
     // TODO: Implement a check that returns early when the block height is below the Sapling
     // activation height.
 
-    let network = match network {
-        Network::Mainnet => zcash_primitives::consensus::Network::MainNetwork,
-        Network::Testnet(params) => {
-            // # Correctness:
-            //
-            // There are differences between the `TestNetwork` parameters and those returned by
-            // `CRegTestParams()` in zcashd, so this function can't return `TestNetwork` unless
-            // Zebra is using the default public Testnet.
-            //
-            // TODO: Remove this conversion by implementing `zcash_primitives::consensus::Parameters`
-            //       for `Network` (#8365).
-            assert!(
-                params.is_default_testnet(),
-                "could not convert configured testnet to zcash_primitives::consensus::Network"
-            );
-            zcash_primitives::consensus::Network::TestNetwork
-        }
-    };
-
     let chain_metadata = ChainMetadata {
         sapling_commitment_tree_size: sapling_tree_size,
         // Orchard is not supported at the moment so the tree size can be 0.
@@ -417,7 +398,7 @@ pub fn scan_block<K: ScanningKey>(
         .collect();
 
     zcash_client_backend::scanning::scan_block(
-        &network,
+        network,
         block_to_compact(block, chain_metadata),
         scanning_keys.as_slice(),
         // Ignore whether notes are change from a viewer's own spends for now.

zebra-utils/src/bin/scanning-results-reader/main.rs

@@ -41,15 +41,13 @@ use zebra_scan::{storage::Storage, Config};
 /// - The transaction fetched via RPC cannot be deserialized from raw bytes.
 #[allow(clippy::print_stdout)]
 pub fn main() {
-    // TODO: Implement `zcash_primitives::consensus::Parameters` for `Network` and remove this variable (#8365).
-    let network = zcash_primitives::consensus::Network::MainNetwork;
-    let zebra_network = zebra_chain::parameters::Network::Mainnet;
-    let storage = Storage::new(&Config::default(), &zebra_network, true);
+    let network = zebra_chain::parameters::Network::Mainnet;
+    let storage = Storage::new(&Config::default(), &network, true);
     // If the first memo is empty, it doesn't get printed. But we never print empty memos anyway.
     let mut prev_memo = "".to_owned();
 
     for (key, _) in storage.sapling_keys_last_heights().iter() {
-        let dfvk = sapling_key_to_scan_block_keys(key, &zebra_network)
+        let dfvk = sapling_key_to_scan_block_keys(key, &network)
             .expect("Scanning key from the storage should be valid")
             .0
             .into_iter()

zebrad/tests/acceptance.rs

@@ -922,6 +922,69 @@ fn invalid_generated_config() -> Result<()> {
     Ok(())
 }
 
+/// Test all versions of `zebrad.toml` we have stored can be parsed by the latest `zebrad`.
+#[tracing::instrument]
+#[test]
+fn stored_configs_parsed_correctly() -> Result<()> {
+    let old_configs_dir = configs_dir();
+    use abscissa_core::Application;
+    use zebrad::application::ZebradApp;
+
+    tracing::info!(?old_configs_dir, "testing older config parsing");
+
+    for config_file in old_configs_dir
+        .read_dir()
+        .expect("read_dir call failed")
+        .flatten()
+    {
+        let config_file_path = config_file.path();
+        let config_file_name = config_file_path
+            .file_name()
+            .expect("config files must have a file name")
+            .to_str()
+            .expect("config file names are valid unicode");
+
+        if config_file_name.starts_with('.') || config_file_name.starts_with('#') {
+            // Skip editor files and other invalid config paths
+            tracing::info!(
+                ?config_file_path,
+                "skipping hidden/temporary config file path"
+            );
+            continue;
+        }
+
+        // ignore files starting with getblocktemplate prefix
+        // if we were not built with the getblocktemplate-rpcs feature.
+        #[cfg(not(feature = "getblocktemplate-rpcs"))]
+        if config_file_name.starts_with(GET_BLOCK_TEMPLATE_CONFIG_PREFIX) {
+            tracing::info!(
+                ?config_file_path,
+                "skipping getblocktemplate-rpcs config file path"
+            );
+            continue;
+        }
+
+        // ignore files starting with shieldedscan prefix
+        // if we were not built with the shielded-scan feature.
+        #[cfg(not(feature = "shielded-scan"))]
+        if config_file_name.starts_with(SHIELDED_SCAN_CONFIG_PREFIX) {
+            tracing::info!(?config_file_path, "skipping shielded-scan config file path");
+            continue;
+        }
+
+        tracing::info!(
+            ?config_file_path,
+            "testing old config can be parsed by current zebrad"
+        );
+
+        ZebradApp::default()
+            .load_config(&config_file_path)
+            .expect("config should parse");
+    }
+
+    Ok(())
+}
+
 /// Test all versions of `zebrad.toml` we have stored can be parsed by the latest `zebrad`.
 #[tracing::instrument]
 fn stored_configs_work() -> Result<()> {

zebrad/tests/common/configs/v1.7.0.toml

@@ -60,7 +60,14 @@ max_connections_per_ip = 1
 network = "Testnet"
 peerset_initial_target_size = 25
 
-[network.testnet_parameters]
+[network.testnet_parameters.activation_heights]
+BeforeOverwinter = 1
+Overwinter = 207_500
+Sapling = 280_000
+Blossom = 584_000
+Heartwood = 903_800
+Canopy = 1_028_500
+NU5 = 1_842_420
 
 [rpc]
 debug_force_finished_sync = false
@@ -81,4 +88,4 @@ parallel_cpu_threads = 0
 buffer_limit = 128000
 force_use_color = false
 use_color = true
-use_journald = false
+use_journald = false