From 112f0f5538d4e6fb662a1005562efebf2adef9ef Mon Sep 17 00:00:00 2001
From: Garand Tyson <garand@stellar.org>
Date: Thu, 5 Jan 2023 14:15:14 -0800
Subject: [PATCH] Enable BucketListDB by default in captive core

---
 .../testdata/expected-offline-core.cfg         |  2 ++
 ingest/ledgerbackend/toml.go                   | 18 ++++++++++++++++++
 services/horizon/CHANGELOG.md                  |  6 ++++++
 3 files changed, 26 insertions(+)

diff --git a/ingest/ledgerbackend/testdata/expected-offline-core.cfg b/ingest/ledgerbackend/testdata/expected-offline-core.cfg
index d6a80a628d..53838f6165 100644
--- a/ingest/ledgerbackend/testdata/expected-offline-core.cfg
+++ b/ingest/ledgerbackend/testdata/expected-offline-core.cfg
@@ -1,5 +1,7 @@
 # Generated file, do not edit
 DATABASE = "sqlite3://stellar.db"
+EXPERIMENTAL_BUCKETLIST_DB = true
+EXPERIMENTAL_BUCKETLIST_DB_INDEX_PAGE_SIZE_EXPONENT = 12
 FAILURE_SAFETY = 0
 HTTP_PORT = 0
 LOG_FILE_PATH = ""
diff --git a/ingest/ledgerbackend/toml.go b/ingest/ledgerbackend/toml.go
index 3f34660af3..9a2845ecac 100644
--- a/ingest/ledgerbackend/toml.go
+++ b/ingest/ledgerbackend/toml.go
@@ -83,6 +83,9 @@ type captiveCoreTomlValues struct {
 	Validators                           []Validator          `toml:"VALIDATORS,omitempty"`
 	HistoryEntries                       map[string]History   `toml:"-"`
 	QuorumSetEntries                     map[string]QuorumSet `toml:"-"`
+	UseBucketListDB                      bool                 `toml:"EXPERIMENTAL_BUCKETLIST_DB,omitempty"`
+	BucketListDBPageSizeExp              *uint                `toml:"EXPERIMENTAL_BUCKETLIST_DB_INDEX_PAGE_SIZE_EXPONENT,omitempty"`
+	BucketListDBCutoff                   *uint                `toml:"EXPERIMENTAL_BUCKETLIST_DB_INDEX_CUTOFF,omitempty"`
 }
 
 // QuorumSetIsConfigured returns true if there is a quorum set defined in the configuration.
@@ -415,6 +418,15 @@ func (c *CaptiveCoreToml) setDefaults(params CaptiveCoreTomlParams) {
 		c.Database = "sqlite3://stellar.db"
 	}
 
+	if def := c.tree.Has("EXPERIMENTAL_BUCKETLIST_DB"); !def && params.UseDB {
+		c.UseBucketListDB = true
+	}
+
+	if c.UseBucketListDB && !c.tree.Has("EXPERIMENTAL_BUCKETLIST_DB_INDEX_PAGE_SIZE_EXPONENT") {
+		n := uint(12)
+		c.BucketListDBPageSizeExp = &n // Set default page size to 4KB
+	}
+
 	if !c.tree.Has("NETWORK_PASSPHRASE") {
 		c.NetworkPassphrase = params.NetworkPassphrase
 	}
@@ -482,6 +494,12 @@ func (c *CaptiveCoreToml) validate(params CaptiveCoreTomlParams) error {
 		)
 	}
 
+	if def := c.tree.Has("EXPERIMENTAL_BUCKETLIST_DB"); def && !params.UseDB {
+		return fmt.Errorf(
+			"BucketListDB enabled in captive core config file, requires Horizon flag --captive-core-use-db",
+		)
+	}
+
 	homeDomainSet := map[string]HomeDomain{}
 	for _, hd := range c.HomeDomains {
 		if _, ok := homeDomainSet[hd.HomeDomain]; ok {
diff --git a/services/horizon/CHANGELOG.md b/services/horizon/CHANGELOG.md
index 5ca9a2f6a9..fd183d8472 100644
--- a/services/horizon/CHANGELOG.md
+++ b/services/horizon/CHANGELOG.md
@@ -6,6 +6,12 @@ file. This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+## 2.23.2
+
+### Changes
+
+- Add support for BucketListDB params in captive core cfg/.toml file and enable BucketListDB by default when `--captive-core-use-db` set.
+
 ## 2.23.1
 
 ### Changes