feat: track transaction metadata (#980)

Signed-off-by: Jenita <jkawan@blinklabs.io>
Signed-off-by: jkawan <kawanjenita@outlook.com>
Co-authored-by: Jenita <jkawan@blinklabs.io>

Author: jkawan

database/models/transaction.go

@@ -26,6 +26,7 @@ type Transaction struct {
 	ID               uint   `gorm:"primaryKey"`
 	Type             int
 	BlockIndex       uint32
+	Metadata         []byte
 }
 
 func (Transaction) TableName() string {

database/plugin/metadata/sqlite/transaction.go

@@ -64,6 +64,10 @@ func (d *MetadataStoreSqlite) SetTransaction(
 		BlockHash:  point.Hash,
 		BlockIndex: idx,
 	}
+	if tx.Metadata() != nil {
+		tmpMetadata := tx.Metadata().Cbor()
+		tmpTx.Metadata = tmpMetadata
+	}
 	collateralReturn := tx.CollateralReturn()
 	for _, utxo := range tx.Produced() {
 		if collateralReturn != nil && utxo.Output == collateralReturn {