From b75c20f5bb993f932b11611a919a580e971683c9 Mon Sep 17 00:00:00 2001
From: John Lotoski <john.lotoski@iohk.io>
Date: Thu, 24 Apr 2025 21:18:15 -0500
Subject: [PATCH] imp: add ledger db default config for 10.4.0

---
 cardano-lib/default.nix                  |  4 ++--
 cardano-lib/mainnet-config.nix           | 21 ++++++++++++++++++++-
 cardano-lib/preprod-config.nix           | 21 ++++++++++++++++++++-
 cardano-lib/preview-config.nix           | 21 ++++++++++++++++++++-
 cardano-lib/testnet-template/config.json |  6 ++++++
 5 files changed, 68 insertions(+), 5 deletions(-)

diff --git a/cardano-lib/default.nix b/cardano-lib/default.nix
index 201132d0..a82e013a 100644
--- a/cardano-lib/default.nix
+++ b/cardano-lib/default.nix
@@ -120,8 +120,8 @@ let
   # as needed.  Any node version string suffixes, such as `-pre`, should be
   # removed from this string identifier.
   #
-  # Min currently 10.2.1 for `GenesisMode` support.
-  minNodeVersion = { MinNodeVersion = "10.2.1"; };
+  # Min currently 10.4.0 for `LedgerDB` config support.
+  minNodeVersion = { MinNodeVersion = "10.4.0"; };
 
   environments = mapAttrs (name: env: {
     inherit name;
diff --git a/cardano-lib/mainnet-config.nix b/cardano-lib/mainnet-config.nix
index 19db356b..ce8bc789 100644
--- a/cardano-lib/mainnet-config.nix
+++ b/cardano-lib/mainnet-config.nix
@@ -3,7 +3,7 @@
 ############### Cardano Node Configuration ###############
 ##########################################################
 
-{
+with builtins; {
   ##### Locations #####
 
   ByronGenesisFile = ./mainnet + "/byron-genesis.json";
@@ -50,6 +50,25 @@
   SyncTargetNumberOfKnownBigLedgerPeers = 100;
   MinBigLedgerPeersForTrustedState = 5;
 
+  # Default Ledger Configuration
+  # Additional configuration options can be found at:
+  # https://ouroboros-consensus.cardano.intersectmbo.org/docs/for-developers/utxo-hd/migrating
+  LedgerDB = {
+    # The time interval between snapshots, in seconds.
+    SnapshotInterval = (fromJSON (readFile ./mainnet/shelley-genesis.json)).securityParam * 2;
+
+    # The number of disk snapshots to keep.
+    NumOfDiskSnapshots = 2;
+
+    # When querying the store for a big range of UTxOs (such as with
+    # QueryUTxOByAddress), the store will be read in batches of this size.
+    QueryBatchSize = 100;
+
+    # The backend can either be in memory with `V2InMemory` or on disk with
+    # `V1LMDB`.
+    Backend = "V2InMemory";
+  };
+
   ##### Update system parameters #####
 
   # This protocol version number gets used by block producing nodes as part
diff --git a/cardano-lib/preprod-config.nix b/cardano-lib/preprod-config.nix
index 05d0b639..dc768193 100644
--- a/cardano-lib/preprod-config.nix
+++ b/cardano-lib/preprod-config.nix
@@ -3,7 +3,7 @@
 ############### Cardano Node Configuration ###############
 ##########################################################
 
-{
+with builtins; {
   ##### Locations #####
 
   ByronGenesisFile = ./preprod + "/byron-genesis.json";
@@ -45,6 +45,25 @@
   SyncTargetNumberOfKnownBigLedgerPeers = 100;
   MinBigLedgerPeersForTrustedState = 5;
 
+  # Default Ledger Configuration
+  # Additional configuration options can be found at:
+  # https://ouroboros-consensus.cardano.intersectmbo.org/docs/for-developers/utxo-hd/migrating
+  LedgerDB = {
+    # The time interval between snapshots, in seconds.
+    SnapshotInterval = (fromJSON (readFile ./preprod/shelley-genesis.json)).securityParam * 2;
+
+    # The number of disk snapshots to keep.
+    NumOfDiskSnapshots = 2;
+
+    # When querying the store for a big range of UTxOs (such as with
+    # QueryUTxOByAddress), the store will be read in batches of this size.
+    QueryBatchSize = 100;
+
+    # The backend can either be in memory with `V2InMemory` or on disk with
+    # `V1LMDB`.
+    Backend = "V2InMemory";
+  };
+
   ##### Update system parameters #####
 
   # This protocol version number gets used by block producing nodes as part
diff --git a/cardano-lib/preview-config.nix b/cardano-lib/preview-config.nix
index 97c42145..c1e9e173 100644
--- a/cardano-lib/preview-config.nix
+++ b/cardano-lib/preview-config.nix
@@ -3,7 +3,7 @@
 ############### Cardano Node Configuration ###############
 ##########################################################
 
-{
+with builtins; {
   ##### Locations #####
 
   ByronGenesisFile = ./preview + "/byron-genesis.json";
@@ -45,6 +45,25 @@
   SyncTargetNumberOfKnownBigLedgerPeers = 100;
   MinBigLedgerPeersForTrustedState = 5;
 
+  # Default Ledger Configuration
+  # Additional configuration options can be found at:
+  # https://ouroboros-consensus.cardano.intersectmbo.org/docs/for-developers/utxo-hd/migrating
+  LedgerDB = {
+    # The time interval between snapshots, in seconds.
+    SnapshotInterval = (fromJSON (readFile ./preview/shelley-genesis.json)).securityParam * 2;
+
+    # The number of disk snapshots to keep.
+    NumOfDiskSnapshots = 2;
+
+    # When querying the store for a big range of UTxOs (such as with
+    # QueryUTxOByAddress), the store will be read in batches of this size.
+    QueryBatchSize = 100;
+
+    # The backend can either be in memory with `V2InMemory` or on disk with
+    # `V1LMDB`.
+    Backend = "V2InMemory";
+  };
+
   ##### Update system parameters #####
 
   LastKnownBlockVersion-Major = 3;
diff --git a/cardano-lib/testnet-template/config.json b/cardano-lib/testnet-template/config.json
index f168da12..fe7cf6ab 100644
--- a/cardano-lib/testnet-template/config.json
+++ b/cardano-lib/testnet-template/config.json
@@ -8,6 +8,12 @@
   "LastKnownBlockVersion-Alt": 0,
   "LastKnownBlockVersion-Major": 3,
   "LastKnownBlockVersion-Minor": 1,
+  "LedgerDB": {
+    "Backend": "V2InMemory",
+    "NumOfDiskSnapshots": 2,
+    "QueryBatchSize": 100,
+    "SnapshotInterval": 216
+  },
   "MaxConcurrencyDeadline": 4,
   "MaxKnownMajorProtocolVersion": 2,
   "PBftSignatureThreshold": 1.1,