Refactor #21 - Add external persistence storage

src/main/kotlin/com/rootsid/wal/library/mongoimpl/WalletDocStorage.kt

@@ -0,0 +1,130 @@
+package com.rootsid.wal.library.mongoimpl
+
+import com.mongodb.client.MongoCollection
+import com.mongodb.client.MongoDatabase
+import com.rootsid.wal.library.mongoimpl.config.DefaultMongoDbConn
+import com.rootsid.wal.library.mongoimpl.document.WalletDocument
+import com.rootsid.wal.library.wallet.model.Wallet
+import com.rootsid.wal.library.wallet.storage.WalletStorage
+import org.litote.kmongo.*
+
+
+class WalletDocStorage(db: MongoDatabase? = null, collectionName: String = "wallet") : WalletStorage {
+    private val walletCollection: MongoCollection<WalletDocument>
+
+    init {
+        val mongoConn = db ?: DefaultMongoDbConn.open()
+
+        this.walletCollection = mongoConn.getCollection<WalletDocument>(collectionName)
+    }
+
+    /**
+     * Insert wallet
+     *
+     * @param wallet Wallet data object to add into the database
+     * @return true if the operation was acknowledged
+     */
+    override fun insert(wallet: Wallet): Wallet {
+        val result = walletCollection.insertOne(wallet as WalletDocument)
+
+        if (result.wasAcknowledged()) {
+            return wallet
+        }
+
+        throw Exception("Failed to insert wallet")
+    }
+
+    /**
+     * Update wallet
+     *
+     * @param wallet updated Wallet data object
+     * @return true if the operation was acknowledged
+     */
+    override fun update(wallet: Wallet): Boolean {
+        val result = walletCollection.updateOne(wallet as WalletDocument, upsert())
+        return result.wasAcknowledged()
+    }
+
+    /**
+     * Find wallet
+     *
+     * @param name name of the wallet to find
+     * @return wallet data object
+     */
+    override fun findByName(name: String): Wallet {
+        return walletCollection.findOne(Wallet::_id eq name) ?: throw Exception("Wallet '$name' not found.")
+    }
+
+    /**
+     * List wallets
+     *
+     * @return list of stored wallet names
+     */
+    override fun list(): List<Wallet> {
+        return walletCollection.find().toList()
+    }
+
+    /**
+     * Wallet exists
+     *
+     * @param name name of the wallet to find
+     * @return true if the wallet was found
+     */
+    override fun exists(name: String): Boolean {
+        val wallet = walletCollection.findOne("{_id:'$name'}")
+        return wallet != null
+    }
+
+    /**
+     * Did alias exists
+     *
+     * @param db MongoDB Client
+     * @param walletName name of the wallet storing the did
+     * @param didAlias alias of the did
+     * @return true if the did was found
+     */
+    fun didAliasExists(walletName: String, didAlias: String): Boolean {
+        val wallet = walletCollection.findOne("{_id:'$walletName','dids':{${MongoOperator.elemMatch}: {'alias':'$didAlias'}}}")
+        return wallet != null
+    }
+
+    /**
+     * Key id exists
+     *
+     * @param db MongoDB Client
+     * @param walletName name of the wallet storing the did
+     * @param didAlias alias of the did
+     * @param keyId key identifier
+     * @return true if the keyId was found
+     */
+    fun keyIdExists(walletName: String, didAlias: String, keyId: String): Boolean {
+        val wallet =
+            walletCollection.findOne("{_id:'$walletName','dids':{${MongoOperator.elemMatch}: {'alias':'$didAlias'}}, 'dids.keyPairs.keyId':'$keyId'}")
+        return wallet != null
+    }
+
+    /**
+     * Issued credential alias exists
+     *
+     * @param db MongoDB Client
+     * @param issuedCredentialAlias credential alias to find
+     * @return true if the did was found
+     */
+    fun issuedCredentialAliasExists(walletName: String, issuedCredentialAlias: String): Boolean {
+        val wallet =
+            walletCollection.findOne("{_id:'$walletName','issuedCredentials':{${MongoOperator.elemMatch}: {'alias':'$issuedCredentialAlias'}}}")
+        return wallet != null
+    }
+
+    /**
+     * Credential alias exists
+     *
+     * @param db MongoDB Client
+     * @param credentialAlias credential alias to find
+     * @return true if the did was found
+     */
+    fun credentialAliasExists(walletName: String, credentialAlias: String): Boolean {
+        val wallet = walletCollection.findOne("{_id:'$walletName','credentials':{${MongoOperator.elemMatch}: {'alias':'$credentialAlias'}}}")
+        return wallet != null
+    }
+}

src/main/kotlin/com/rootsid/wal/library/mongoimpl/config/DefaultMongoDbConn.kt

@@ -0,0 +1,22 @@
+package com.rootsid.wal.library.mongoimpl.config
+
+import com.mongodb.client.MongoClient
+import com.mongodb.client.MongoDatabase
+import com.rootsid.wal.library.Constant
+import org.litote.kmongo.KMongo
+
+object DefaultMongoDbConn : MongoDbConn {
+    private var db: MongoDatabase = openDb()
+
+    fun open(): MongoDatabase {
+        return db
+    }
+
+    override fun getDbName(): String {
+        return Constant.DB_NAME
+    }
+
+    override fun getMongoClient(): MongoClient {
+        return KMongo.createClient()
+    }
+}

src/main/kotlin/com/rootsid/wal/library/mongoimpl/config/MongoDbConn.kt

@@ -0,0 +1,22 @@
+package com.rootsid.wal.library.mongoimpl.config
+
+import com.mongodb.client.MongoClient
+import com.mongodb.client.MongoDatabase
+
+interface MongoDbConn {
+    fun getDbName(): String
+
+    fun getMongoClient() : MongoClient
+
+    /**
+     * Open db
+     *
+     * @return a MongoDatabase representing 'wal' database
+     */
+    fun openDb(): MongoDatabase {
+        // TODO: make this configurable so it can use other connection settings
+        val client = getMongoClient() // get com.mongodb.MongoClient new instance
+        // TODO: make databaseName configurable
+        return client.getDatabase(getDbName()) // normal java driver usage
+    }
+}

src/main/kotlin/com/rootsid/wal/library/wallet/storage/document/WalletDocument.kt → src/main/kotlin/com/rootsid/wal/library/mongoimpl/document/WalletDocument.kt

@@ -1,4 +1,4 @@
-package com.rootsid.wal.library.wallet.storage.document
+package com.rootsid.wal.library.mongoimpl.document
 
 import com.rootsid.wal.library.dlt.model.Did
 import com.rootsid.wal.library.wallet.model.ImportedCredential
@@ -9,8 +9,6 @@ import kotlinx.serialization.Serializable
 @Serializable
 data class WalletDocument(
     override val _id: String,
-//    override val mnemonic: List<String>,
-//    override val passphrase: String,
     override val seed: String,
     override var dids: MutableList<Did> = mutableListOf(),
     // List of imported (Issued elsewhere)

src/main/kotlin/com/rootsid/wal/library/wallet/WalletService.kt

@@ -1,12 +1,14 @@
 package com.rootsid.wal.library.wallet
 
 import com.rootsid.wal.library.Constant
+import com.rootsid.wal.library.mongoimpl.document.WalletDocument
 import com.rootsid.wal.library.wallet.model.Wallet
-import com.rootsid.wal.library.wallet.storage.Storage
+import com.rootsid.wal.library.wallet.storage.WalletStorage
 import io.iohk.atala.prism.crypto.derivation.KeyDerivation
 import io.iohk.atala.prism.crypto.derivation.MnemonicCode
+import io.iohk.atala.prism.crypto.util.BytesOps
 
-class WalletService(private val storage: Storage) {
+class WalletService(private val walletStorage: WalletStorage) {
 
     /**
      * New wallet
@@ -17,9 +19,8 @@ class WalletService(private val storage: Storage) {
      * @return a new wallet
      */
     fun createWallet(name: String, mnemonic: String, passphrase: String): Wallet {
-        val mnemonicList = mnemonic.split(Constant.MNEMONIC_SEPARATOR).map { it.trim() }
         val seed = generateSeed(mnemonic, passphrase)
-        return storage.createWallet(name, seed)
+        return walletStorage.insert(WalletDocument(name, BytesOps.bytesToHex(seed)))
     }
 
     /**
@@ -29,7 +30,7 @@ class WalletService(private val storage: Storage) {
      * @param passphrase Passphrase to protect the seed with a password
      * @return seed
      */
-    fun generateSeed(mnemonic: String, passphrase: String): ByteArray {
+    private fun generateSeed(mnemonic: String, passphrase: String): ByteArray {
         val seed: ByteArray
         val mnemonicList: MnemonicCode
         if (mnemonic.trim().isBlank()) {

src/main/kotlin/com/rootsid/wal/library/wallet/storage/BlockchainTxLogStorage.kt

@@ -0,0 +1,9 @@
+package com.rootsid.wal.library.wallet.storage
+
+import com.rootsid.wal.library.wallet.model.BlockchainTxLog
+
+interface BlockchainTxLogStorage {
+    fun insert(txLog: BlockchainTxLog): BlockchainTxLog
+
+    fun list(): List<BlockchainTxLog>
+}

src/main/kotlin/com/rootsid/wal/library/wallet/storage/WalletStorage.kt

@@ -0,0 +1,15 @@
+package com.rootsid.wal.library.wallet.storage
+
+import com.rootsid.wal.library.wallet.model.Wallet
+
+interface WalletStorage {
+    fun insert(wallet: Wallet): Wallet
+
+    fun update(wallet: Wallet): Boolean
+
+    fun findByName(name: String): Wallet
+
+    fun exists(name: String): Boolean
+
+    fun list(): List<Wallet>
+}