start of implementation

src/main/kotlin/models/Config.kt

@@ -0,0 +1,9 @@
+package models
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class Config(
+    val token: String,
+    val database: DatabaseConfig
+)

src/main/kotlin/models/DBConnectOptions.kt

@@ -0,0 +1,9 @@
+package models
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class DBConnectOptions(
+    val attempts: Int = 3,
+    val delay: Long = 1000L
+)

src/main/kotlin/models/DatabaseConfig.kt

@@ -0,0 +1,37 @@
+package models
+
+import dev.inmo.kslog.common.e
+import dev.inmo.kslog.common.logger
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.Transient
+import org.jetbrains.exposed.sql.Database
+import org.jetbrains.exposed.sql.transactions.transactionManager
+import org.postgresql.Driver
+import java.sql.Connection
+
+@Serializable
+data class DatabaseConfig(
+    val url: String = "jdbc:pgsql://localhost:12346/test",
+    val driver: String = Driver::class.qualifiedName!!,
+    val username: String = "",
+    val password: String = "",
+    val reconnectOptions: DBConnectOptions? = DBConnectOptions()
+) {
+    @Transient
+    val database: Database = (0 until (reconnectOptions ?.attempts ?: 1)).firstNotNullOfOrNull {
+        runCatching {
+            Database.connect(
+                url,
+                driver,
+                username,
+                password
+            ).also {
+                it.transactionManager.defaultIsolationLevel = Connection.TRANSACTION_SERIALIZABLE // Or Connection.TRANSACTION_READ_UNCOMMITTED
+                it.connector().close()
+            }
+        }.onFailure {
+            logger.e(it)
+            Thread.sleep(reconnectOptions ?.delay ?: return@onFailure)
+        }.getOrNull()
+    } ?: error("Unable to create database")
+}