utxocache: Set new backend info with version one.

When starting a utxo database that does not have db info yet, the
version must be the initial one so set as such rather than the current
version. This ensures crucial updates are not skipped.

internal/blockchain/compress.go

@@ -13,6 +13,10 @@ import (
 	"github.com/decred/dcrd/txscript/v4"
 )
 
+// initialCompressionVersion is the initial script compression version of the
+// database.
+const initialCompressionVersion = 1
+
 // currentCompressionVersion is the current script compression version of the
 // database.
 const currentCompressionVersion = 1

internal/blockchain/utxobackend.go

@@ -24,6 +24,9 @@ import (
 )
 
 const (
+	// initialUtxoDatabaseVersion indicates the initial UTXO database version.
+	initialUtxoDatabaseVersion = 1
+
 	// currentUtxoDatabaseVersion indicates the current UTXO database version.
 	currentUtxoDatabaseVersion = 3
 
@@ -716,8 +719,8 @@ func (l *levelDbUtxoBackend) createUtxoBackendInfo(blockDBVersion uint32) error
 	// Write the creation and version information to the database.
 	return l.Update(func(tx UtxoBackendTx) error {
 		return l.dbPutUtxoBackendInfo(tx, &UtxoBackendInfo{
-			version: currentUtxoDatabaseVersion,
-			compVer: currentCompressionVersion,
+			version: initialUtxoDatabaseVersion,
+			compVer: initialCompressionVersion,
 			utxoVer: utxoVer,
 			created: time.Now(),
 		})
@@ -829,7 +832,7 @@ func (l *levelDbUtxoBackend) PutUtxos(utxos map[wire.OutPoint]*UtxoEntry,
 }
 
 // Upgrade upgrades the UTXO backend by applying all possible upgrades
-// iteratively as needed.
+// iteractively as needed.
 func (l *levelDbUtxoBackend) Upgrade(ctx context.Context, b *BlockChain) error {
 	// Upgrade the UTXO database as needed.
 	return upgradeUtxoDb(ctx, b.db, l)