feat: fixed some route serialization

server/build.gradle.kts

@@ -1,3 +1,4 @@
+import java.time.Instant
 val ktor_version: String by project
 val kotlin_version: String by project
 val logback_version: String by project
@@ -13,12 +14,20 @@ plugins {
     id("io.ktor.plugin") version "3.3.3"
     id("com.gradleup.shadow") version "9.3.0"
     id("org.flywaydb.flyway") version "11.19.0"
+    id("com.github.gmazzo.buildconfig") version "6.0.6"
     application
 }
 
 group = "org.ccoin"
 version = "1.0.0"
 
+buildConfig {
+    buildConfigField("String", "VERSION", "\"${project.version}\"")
+    buildConfigField("BASE_URL", "https://ccoin.darwincereska.dev")
+    buildConfigField("String", "BUILD_TIME", "\"${Instant.now()}\"")
+    packageName("org.ccoin")
+}
+
 application {
     mainClass.set("org.ccoin.ServerKt")
 

server/gradle.properties

@@ -19,7 +19,7 @@ kotlin.code.style=official
 org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 org.gradle.caching=true
 org.gradle.parallel=true
-org.gradle.configuration-cache=true
+org.gradle.configuration-cache=false
 
 # Application
 ccoin.version=1.0.0

server/src/main/kotlin/org/ccoin/Server.kt

@@ -1,5 +1,258 @@
 package org.ccoin
 
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.application.*
+import io.ktor.server.engine.*
+import io.ktor.server.netty.*
+import io.ktor.server.plugins.calllogging.*
+import io.ktor.server.plugins.compression.*
+import io.ktor.server.plugins.contentnegotiation.*
+import io.ktor.server.plugins.cors.routing.*
+import io.ktor.server.plugins.defaultheaders.*
+import io.ktor.server.plugins.statuspages.*
+import io.ktor.server.request.*
+import io.ktor.server.response.*
+import io.ktor.server.routing.*
+import kotlinx.serialization.json.Json
+import org.ccoin.config.DatabaseConfig
+import org.ccoin.config.ServerConfig
+import org.ccoin.exceptions.CCoinException
+import org.ccoin.exceptions.InsufficientFundsException
+import org.ccoin.exceptions.InvalidTransactionException
+import org.ccoin.exceptions.WalletNotFoundException
+import org.ccoin.routes.*
+import org.slf4j.LoggerFactory
+import org.slf4j.event.Level
+import kotlinx.serialization.Serializable
+
 fun main() {
-    println("CCoin Server Started")
+    val logger = LoggerFactory.getLogger("CCoinServer")
+    
+    try {
+        logger.info("Starting CCoin Server...")
+        
+        // Validate configuration
+        ServerConfig.validateConfig()
+        
+        // Initialize database
+        DatabaseConfig.init()
+        
+        // Start server
+        embeddedServer(
+            Netty, 
+            port = ServerConfig.port, 
+            host = ServerConfig.host,
+            module = Application::module
+        ).start(wait = true)
+        
+    } catch (e: Exception) {
+        logger.error("Failed to start CCoin Server", e)
+        throw e
+    }
 }
+
+fun Application.module() {
+    val logger = LoggerFactory.getLogger("CCoinServer")
+    
+    logger.info("Configuring CCoin Server modules...")
+    
+    configureSerialization()
+    configureHTTP()
+    configureStatusPages()
+    configureRouting()
+    
+    logger.info("CCoin Server started successfully on ${ServerConfig.host}:${ServerConfig.port}")
+}
+
+fun Application.configureSerialization() {
+    install(ContentNegotiation) {
+        json(Json {
+            prettyPrint = true
+            isLenient = true
+            ignoreUnknownKeys = true
+            encodeDefaults = false
+        })
+    }
+}
+
+fun Application.configureHTTP() {
+    install(CORS) {
+        allowMethod(HttpMethod.Options)
+        allowMethod(HttpMethod.Put)
+        allowMethod(HttpMethod.Delete)
+        allowMethod(HttpMethod.Patch)
+        allowHeader(HttpHeaders.Authorization)
+        allowHeader(HttpHeaders.ContentType)
+        allowHeader(HttpHeaders.AccessControlAllowOrigin)
+        allowCredentials = true
+        anyHost() // For development - restrict in production
+    }
+    
+    install(CallLogging) {
+        level = Level.INFO
+        filter { call -> call.request.uri.startsWith("/") }
+        format { call ->
+            val status = call.response.status()
+            val httpMethod = call.request.httpMethod.value
+            val userAgent = call.request.headers["User-Agent"]
+            val uri = call.request.uri
+            "$status: $httpMethod $uri - $userAgent"
+        }
+    }
+    
+    install(Compression) {
+        gzip {
+            priority = 1.0
+        }
+        deflate {
+            priority = 10.0
+            minimumSize(1024)
+        }
+    }
+    
+    install(DefaultHeaders) {
+        header("X-Engine", "Ktor")
+        header("X-Service", "CCoin")
+        header("X-Version", ServerConfig.version)
+    }
+}
+
+fun Application.configureStatusPages() {
+    install(StatusPages) {
+        exception<WalletNotFoundException> { call, cause ->
+            call.respond(
+                HttpStatusCode.NotFound,
+                mapOf(
+                    "error" to cause.message,
+                    "code" to "WALLET_NOT_FOUND",
+                    "address" to cause.address
+                )
+            )
+        }
+        
+        exception<InsufficientFundsException> { call, cause ->
+            call.respond(
+                HttpStatusCode.BadRequest,
+                mapOf(
+                    "error" to cause.message,
+                    "code" to "INSUFFICIENT_FUNDS",
+                    "address" to cause.address,
+                    "requested" to cause.requestedAmount,
+                    "available" to cause.availableBalance
+                )
+            )
+        }
+        
+        exception<InvalidTransactionException> { call, cause ->
+            call.respond(
+                HttpStatusCode.BadRequest,
+                mapOf(
+                    "error" to cause.message,
+                    "code" to "INVALID_TRANSACTION",
+                    "transactionHash" to cause.transactionHash
+                )
+            )
+        }
+        
+        exception<CCoinException> { call, cause ->
+            call.respond(
+                HttpStatusCode.BadRequest,
+                mapOf(
+                    "error" to cause.message,
+                    "code" to cause.errorCode
+                )
+            )
+        }
+        
+        exception<IllegalArgumentException> { call, cause ->
+            call.respond(
+                HttpStatusCode.BadRequest,
+                mapOf(
+                    "error" to (cause.message ?: "Invalid argument"),
+                    "code" to "INVALID_ARGUMENT"
+                )
+            )
+        }
+        
+        exception<Throwable> { call, cause ->
+            val logger = LoggerFactory.getLogger("CCoinServer")
+            logger.error("Unhandled exception", cause)
+            
+            call.respond(
+                HttpStatusCode.InternalServerError,
+                mapOf(
+                    "error" to if (ServerConfig.developmentMode) {
+                        cause.message ?: "Internal server error"
+                    } else {
+                        "Internal server error"
+                    },
+                    "code" to "INTERNAL_ERROR"
+                )
+            )
+        }
+    }
+}
+
+fun Application.configureRouting() {
+    routing {
+        // Root endpoint
+        get("/") {
+            call.respond(
+                DefaultResponse(
+                    service = "CCoin Server",
+                    version = ServerConfig.version,
+                    status = "running",
+                    timestamp = System.currentTimeMillis(),
+                    endpoints = listOf(
+                        Endpoint("health", "/health"),
+                        Endpoint("api", "/api/routes"),
+                        Endpoint("wallet", "/wallet"),
+                        Endpoint("transaction", "/transaction"),
+                        Endpoint("mining", "/mining"),
+                        Endpoint("block", "/block")
+                    )
+                )
+            )
+        }
+        
+        // API routes
+        walletRoutes()
+        transactionRoutes()
+        miningRoutes()
+        blockRoutes()
+        healthRoutes()
+        apiRoutes()
+        
+        // Catch-all for undefined routes
+        route("{...}") {
+            handle {
+                call.respond(
+                    HttpStatusCode.NotFound,
+                    mapOf(
+                        "error" to "Endpoint not found",
+                        "code" to "NOT_FOUND",
+                        "path" to call.request.uri,
+                        "method" to call.request.httpMethod.value,
+                        "availableEndpoints" to "/api/routes"
+                    )
+                )
+            }
+        }
+    }
+}
+
+@Serializable
+data class DefaultResponse(
+    val service: String,
+    val version: String,
+    val status: String,
+    val timestamp: Long,
+    val endpoints: List<Endpoint>
+)
+
+@Serializable
+data class Endpoint(
+    val name: String,
+    val route: String
+)

server/src/main/kotlin/org/ccoin/config/DatabaseConfig.kt

@@ -16,7 +16,7 @@ object DatabaseConfig {
 
         val config = HikariConfig().apply {
             driverClassName = "org.postgresql.Driver"
-            jdbcUrl = System.getenv("DATABASE_URL") ?: "jbdc:postgresql://localhost:5432/ccoin"
+            jdbcUrl = System.getenv("DATABASE_URL") ?: "jdbc:postgresql://localhost:5432/ccoin"
             username = System.getenv("DATABASE_USER") ?: "ccoin"
             password = System.getenv("DATABASE_PASSWORD") ?: "ccoin"
 
@@ -28,8 +28,7 @@ object DatabaseConfig {
             maxLifetime = 1800000
 
             // Performance settings
-            isAutoCommit = false
+            isAutoCommit = true
-            transactionIsolation = "TRANSACTION_REPEATABLE_READ"
 
             // Connection validation
             connectionTestQuery = "SELECT 1"

server/src/main/kotlin/org/ccoin/config/ServerConfig.kt

@@ -1,14 +1,20 @@
 package org.ccoin.config
 
 import org.slf4j.LoggerFactory
+import org.ccoin.BuildConfig
 
 object ServerConfig {
     private val logger = LoggerFactory.getLogger(ServerConfig::class.java)
     
+    // App Details
+    val version: String = BuildConfig.VERSION
+    val buildTime: String = BuildConfig.BUILD_TIME
+    val baseUrl: String = BuildConfig.BASE_URL
+
     // Server settings
     val host: String = System.getenv("SERVER_HOST") ?: "0.0.0.0"
     val port: Int = System.getenv("SERVER_PORT")?.toIntOrNull() ?: 8080
-    val developmentMode: Boolean = System.getenv("DEVELOPMENT_MODE")?.toBoolean() ?: false
+    val developmentMode: Boolean = System.getenv("DEVELOPMENT_MODE")?.toBoolean() ?: true
 
     // Mining settings
     val miningDifficulty: Int = System.getenv("MINING_DIFFICULTY")?.toIntOrNull() ?: 4
@@ -59,7 +65,7 @@ object ServerConfig {
             "host" to host,
             "port" to port,
             "developmentMode" to developmentMode,
-            "version" to "1.0.0",
+            "version" to version,
             "miningDifficulty" to miningDifficulty,
             "miningReward" to miningReward,
             "blockTimeTarget" to blockTimeTarget,

server/src/main/kotlin/org/ccoin/routes/ApiRoutes.kt

@@ -2,11 +2,14 @@ package org.ccoin.routes
 
 import io.ktor.http.*
 import io.ktor.server.application.*
+import org.ccoin.config.ServerConfig
 import io.ktor.server.response.*
 import io.ktor.server.routing.*
+import kotlinx.serialization.Serializable
 
 fun Route.apiRoutes() {
     route("/api") {
+        
         /** Get all available API routes */
         get("/routes") {
             try {
@@ -66,18 +69,16 @@ fun Route.apiRoutes() {
                     )
                 )
                 
-                val summary = mapOf(
+                val summary = ApiSummary(
-                    "totalEndpoints" to routes.values.sumOf { it.size },
+                    totalEndpoints = routes.values.sumOf { it.size },
-                    "categories" to routes.keys.toList(),
+                    categories = routes.keys.toList(),
-                    "baseUrl" to "http://localhost:8080",
+                    baseUrl = ServerConfig.baseUrl,
-                    "documentation" to "https://github.com/your-repo/ccoin-server/docs",
+                    documentation = "https://github.com/your-repo/ccoin-server/docs",
-                    "version" to "1.0.0"
+                    version = ServerConfig.version
                 )
                 
-                call.respond(mapOf(
+                val response = ApiRoutesResponse(summary, routes)
-                    "summary" to summary,
+                call.respond(response)
-                    "routes" to routes
-                ))
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf(
@@ -89,42 +90,20 @@ fun Route.apiRoutes() {
         /** Get API documentation */
         get("/docs") {
             try {
-                val documentation = mapOf(
+                call.respond(mapOf(
                     "title" to "CCoin API Documentation",
-                    "version" to "1.0.0",
+                    "version" to ServerConfig.version,
                     "description" to "REST API for CCoin cryptocurrency server",
-                    "baseUrl" to "http://localhost:8080",
+                    "baseUrl" to ServerConfig.baseUrl,
                     "authentication" to "None required",
                     "contentType" to "application/json",
                     "rateLimit" to "100 requests per minute",
-                    "sections" to mapOf(
+                    "addressFormat" to "random_word:random_6_digits (e.g., phoenix:123456)",
-                        "wallet" to mapOf(
+                    "hashFormat" to "64-character hex string",
-                            "description" to "Wallet management endpoints",
+                    "defaultDifficulty" to "4",
-                            "addressFormat" to "random_word:random_6_digits (e.g., phoenix:123456)"
+                    "defaultReward" to "50.0",
-                        ),
+                    "memoMaxLength" to "256"
-                        "transaction" to mapOf(
+                ))
-                            "description" to "Transaction management endpoints",
-                            "fees" to "Optional, defaults to 0.0",
-                            "memoMaxLength" to 256
-                        ),
-                        "mining" to mapOf(
-                            "description" to "Mining and block creation endpoints",
-                            "defaultDifficulty" to 4,
-                            "defaultReward" to 50.0
-                        ),
-                        "block" to mapOf(
-                            "description" to "Blockchain query endpoints",
-                            "hashFormat" to "64-character hex string"
-                        )
-                    ),
-                    "errorCodes" to mapOf(
-                        "400" to "Bad Request - Invalid parameters",
-                        "404" to "Not Found - Resource not found",
-                        "500" to "Internal Server Error - Server error"
-                    )
-                )
-                
-                call.respond(documentation)
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf(
@@ -137,88 +116,46 @@ fun Route.apiRoutes() {
         get("/examples") {
             try {
                 val examples = mapOf(
-                    "createWallet" to mapOf(
+                    "createWallet" to ApiExample(
-                        "method" to "POST",
+                        method = "POST",
-                        "url" to "/wallet/create",
+                        url = "/wallet/create",
-                        "body" to mapOf(
+                        body = """{"label": "My Wallet"}""",
-                            "label" to "My Wallet"
+                        response = """{"address": "phoenix:123456", "balance": 0.0, "label": "My Wallet", "createdAt": 1703097600, "lastActivity": null}"""
                     ),
-                        "response" to mapOf(
+                    "sendTransaction" to ApiExample(
-                            "address" to "phoenix:123456",
+                        method = "POST",
-                            "balance" to 0.0,
+                        url = "/transaction/send",
-                            "label" to "My Wallet",
+                        body = """{"fromAddress": "phoenix:123456", "toAddress": "dragon:789012", "amount": 10.5, "fee": 0.01, "memo": "Payment for services"}""",
-                            "createdAt" to 1703097600,
+                        response = """{"hash": "abc123...", "fromAddress": "phoenix:123456", "toAddress": "dragon:789012", "amount": 10.5, "fee": 0.01, "memo": "Payment for services", "timestamp": 1703097600, "status": "CONFIRMED"}"""
-                            "lastActivity" to null
-                        )
                     ),
-                    "sendTransaction" to mapOf(
+                    "startMining" to ApiExample(
-                        "method" to "POST",
+                        method = "POST",
-                        "url" to "/transaction/send",
+                        url = "/mining/start",
-                        "body" to mapOf(
+                        body = """{"minerAddress": "tiger:456789", "difficulty": 4}""",
-                            "fromAddress" to "phoenix:123456",
+                        response = """{"jobId": "job123", "target": "0000", "difficulty": 4, "previousHash": "def456...", "height": 100, "timestamp": 1703097600, "expiresAt": 1703097900}"""
-                            "toAddress" to "dragon:789012",
-                            "amount" to 10.5,
-                            "fee" to 0.01,
-                            "memo" to "Payment for services"
                     ),
-                        "response" to mapOf(
+                    "getBlock" to ApiExample(
-                            "hash" to "abc123...",
+                        method = "GET",
-                            "fromAddress" to "phoenix:123456",
+                        url = "/block/abc123...",
-                            "toAddress" to "dragon:789012",
+                        response = """{"hash": "abc123...", "previousHash": "def456...", "merkleRoot": "ghi789...", "timestamp": 1703097600, "difficulty": 4, "nonce": 12345, "minerAddress": "tiger:456789", "reward": 50.0, "height": 100, "transactionCount": 0, "confirmations": 6}"""
-                            "amount" to 10.5,
-                            "fee" to 0.01,
-                            "memo" to "Payment for services",
-                            "timestamp" to 1703097600,
-                            "status" to "CONFIRMED"
-                        )
-                    ),
-                    "startMining" to mapOf(
-                        "method" to "POST",
-                        "url" to "/mining/start",
-                        "body" to mapOf(
-                            "minerAddress" to "tiger:456789",
-                            "difficulty" to 4
-                        ),
-                        "response" to mapOf(
-                            "jobId" to "job123",
-                            "target" to "0000",
-                            "difficulty" to 4,
-                            "previousHash" to "def456...",
-                            "height" to 100,
-                            "timestamp" to 1703097600,
-                            "expiresAt" to 1703097900
-                        )
-                    ),
-                    "getBlock" to mapOf(
-                        "method" to "GET",
-                        "url" to "/block/abc123...",
-                        "response" to mapOf(
-                            "hash" to "abc123...",
-                            "previousHash" to "def456...",
-                            "merkleRoot" to "ghi789...",
-                            "timestamp" to 1703097600,
-                            "difficulty" to 4,
-                            "nonce" to 12345,
-                            "minerAddress" to "tiger:456789",
-                            "reward" to 50.0,
-                            "height" to 100,
-                            "transactionCount" to 0,
-                            "confirmations" to 6
-                        )
                     )
                 )
                 
-                call.respond(mapOf(
+                val curlExamples = mapOf(
-                    "title" to "CCoin API Examples",
+                    "createWallet" to """curl -X POST http://localhost:8080/wallet/create -H 'Content-Type: application/json' -d '{"label":"My Wallet"}'""",
-                    "description" to "Common usage examples for the CCoin API",
-                    "examples" to examples,
-                    "curlExamples" to mapOf(
-                        "createWallet" to "curl -X POST http://localhost:8080/wallet/create -H 'Content-Type: application/json' -d '{\"label\":\"My Wallet\"}'",
                     "getBalance" to "curl http://localhost:8080/wallet/phoenix:123456/balance",
-                        "sendTransaction" to "curl -X POST http://localhost:8080/transaction/send -H 'Content-Type: application/json' -d '{\"fromAddress\":\"phoenix:123456\",\"toAddress\":\"dragon:789012\",\"amount\":10.5}'",
+                    "sendTransaction" to """curl -X POST http://localhost:8080/transaction/send -H 'Content-Type: application/json' -d '{"fromAddress":"phoenix:123456","toAddress":"dragon:789012","amount":10.5}'""",
                     "getLatestBlocks" to "curl http://localhost:8080/blocks/latest?limit=5"
                 )
-                ))
+                
+                val response = ApiExamplesResponse(
+                    title = "CCoin API Examples",
+                    description = "Common usage examples for the CCoin API",
+                    examples = examples,
+                    curlExamples = curlExamples
+                )
+                
+                call.respond(response)
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf(
@@ -229,3 +166,43 @@ fun Route.apiRoutes() {
     }
 }
 
+@Serializable
+data class ApiSummary(
+    val totalEndpoints: Int,
+    val categories: List<String>,
+    val baseUrl: String,
+    val documentation: String,
+    val version: String
+)
+
+@Serializable
+data class ApiRoutesResponse(
+    val summary: ApiSummary,
+    val routes: Map<String, Map<String, String>>
+)
+
+@Serializable
+data class ApiExample(
+    val method: String,
+    val url: String,
+    val body: String? = null,
+    val response: String
+)
+
+@Serializable
+data class ApiExamplesResponse(
+    val title: String,
+    val description: String,
+    val examples: Map<String, ApiExample>,
+    val curlExamples: Map<String, String>
+)
+
+@Serializable
+data class PaginationInfo(
+    val currentPage: Int,
+    val pageSize: Int,
+    val totalItems: Long,
+    val totalPages: Long,
+    val hasNext: Boolean,
+    val hasPrevious: Boolean
+)

server/src/main/kotlin/org/ccoin/routes/BlockRoutes.kt

@@ -6,6 +6,8 @@ import io.ktor.server.response.*
 import io.ktor.server.routing.*
 import org.ccoin.services.BlockService
 import org.ccoin.services.ValidationService
+import org.ccoin.models.BlockResponse
+import kotlinx.serialization.Serializable
 
 fun Route.blockRoutes() {
     route("/block") {
@@ -75,10 +77,12 @@ fun Route.blockRoutes() {
                 }
                 
                 val exists = BlockService.blockExists(hash)
-                call.respond(mapOf(
+                call.respond(
-                    "hash" to hash,
+                    BlockExistsResponse(
-                    "exists" to exists
+                        hash = hash,
-                ))
+                        exists = exists
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to check block existence")))
@@ -93,16 +97,18 @@ fun Route.blockRoutes() {
             try {
                 val limit = call.request.queryParameters["limit"]?.toIntOrNull() ?: 10
                 
-                if (limit in 0..100) {
+                if (limit !in 1..100) {
                     call.respond(HttpStatusCode.BadRequest, mapOf("error" to "Limit must be between 1 and 100"))
                     return@get
                 }
                 
                 val blocks = BlockService.getLatestBlocks(limit)
-                call.respond(mapOf(
+                call.respond(
-                    "blocks" to blocks,
+                    BlocksLatestResponse(
-                    "count" to blocks.size
+                        blocks = blocks,
-                ))
+                        count = blocks.size
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get latest blocks")))
@@ -172,16 +178,30 @@ fun Route.blockRoutes() {
                 val offset = (page - 1) * pageSize
                 val blocks = BlockService.getBlocksByMiner(address, pageSize, offset)
                 
-                call.respond(mapOf(
+                // call.respond(mapOf(
-                    "blocks" to blocks,
+                //     "blocks" to blocks,
-                    "minerAddress" to address,
+                //     "minerAddress" to address,
-                    "pagination" to mapOf(
+                //     "pagination" to mapOf(
-                        "currentPage" to page,
+                //         "currentPage" to page,
-                        "pageSize" to pageSize,
+                //         "pageSize" to pageSize,
-                        "hasNext" to (blocks.size == pageSize),
+                //         "hasNext" to (blocks.size == pageSize),
-                        "hasPrevious" to (page > 1)
+                //         "hasPrevious" to (page > 1)
+                //     )
+                // ))
+                call.respond(
+                    BlocksMinerResponse(
+                        blocks = blocks,
+                        minerAddress = address,
+                        pagination = PaginationInfo(
+                            currentPage = page,
+                            pageSize = pageSize,
+                            hasNext = (blocks.size == pageSize),
+                            hasPrevious = (page > 1),
+                            totalPages = blocks.size.toLong(),
+                            totalItems = blocks.size.toLong()
+                        )
+                    )
                 )
-                ))
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get blocks by miner")))
@@ -218,12 +238,14 @@ fun Route.blockRoutes() {
                 }
                 
                 val blocks = BlockService.getBlocksByTimeRange(fromTime, toTime)
-                call.respond(mapOf(
+                call.respond(
-                    "blocks" to blocks,
+                    BlocksTimeRangeResponse(
-                    "fromTime" to fromTime,
+                        blocks = blocks,
-                    "toTime" to toTime,
+                        fromTime = fromTime,
-                    "count" to blocks.size
+                        toTime = toTime,
-                ))
+                        count = blocks.size
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get blocks by time range")))
@@ -244,11 +266,13 @@ fun Route.blockRoutes() {
                 }
                 
                 val blocks = BlockService.getBlocksByDifficulty(difficulty)
-                call.respond(mapOf(
+                call.respond(
-                    "blocks" to blocks,
+                    BlocksDifficultyResponse(
-                    "difficulty" to difficulty,
+                        blocks = blocks,
-                    "count" to blocks.size
+                        difficulty = difficulty,
-                ))
+                        count = blocks.size
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get blocks by difficulty")))
@@ -264,13 +288,15 @@ fun Route.blockRoutes() {
                 val averageBlockTime = BlockService.getAverageBlockTime()
                 val totalRewards = BlockService.getTotalRewardsDistributed()
                 
-                call.respond(mapOf(
+                call.respond(
-                    "totalBlocks" to totalBlocks,
+                    BlocksStatsResponse(
-                    "latestHeight" to latestHeight,
+                        totalBlocks = totalBlocks,
-                    "latestHash" to latestHash,
+                        latestHeight = latestHeight,
-                    "averageBlockTime" to averageBlockTime,
+                        latestHash = latestHash,
-                    "totalRewardsDistributed" to totalRewards
+                        averageBlockTime = averageBlockTime,
-                ))
+                        totalRewardsDistributed = totalRewards
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get blockchain statistics")))
@@ -278,3 +304,46 @@ fun Route.blockRoutes() {
         }
     }
 }
+
+@Serializable
+data class BlockExistsResponse(
+    val hash: String,
+    val exists: Boolean
+)
+
+@Serializable
+data class BlocksLatestResponse(
+    val blocks: List<BlockResponse>,
+    val count: Int
+)
+
+@Serializable
+data class BlocksMinerResponse(
+    val blocks: List<BlockResponse>,
+    val minerAddress: String,
+    val pagination: PaginationInfo
+)
+
+@Serializable
+data class BlocksTimeRangeResponse(
+    val blocks: List<BlockResponse>,
+    val fromTime: Long,
+    val toTime: Long,
+    val count: Int
+)
+
+@Serializable
+data class BlocksDifficultyResponse(
+    val blocks: List<BlockResponse>,
+    val difficulty: Int,
+    val count: Int
+)
+
+@Serializable
+data class BlocksStatsResponse(
+    val totalBlocks: Long,
+    val latestHeight: Int,
+    val latestHash: String,
+    val averageBlockTime: Long,
+    val totalRewardsDistributed: Double
+)

server/src/main/kotlin/org/ccoin/routes/HealthRoutes.kt

@@ -16,6 +16,7 @@ import org.ccoin.services.MiningService
 import org.jetbrains.exposed.sql.Database
 import org.jetbrains.exposed.sql.transactions.transaction
 import java.lang.management.ManagementFactory
+import kotlinx.serialization.Serializable
 
 fun Route.healthRoutes() {
     /** Basic health check */
@@ -33,7 +34,7 @@ fun Route.healthRoutes() {
             
             val health = HealthResponse(
                 status = if (dbHealth.connected) "healthy" else "unhealthy",
-                version = "1.0.0",
+                version = ServerConfig.version,
                 uptime = uptime,
                 database = dbHealth,
                 blockchain = blockchainHealth
@@ -61,19 +62,15 @@ fun Route.healthRoutes() {
             val diskSpace = getDiskSpace()
             val networkStats = getNetworkStats()
             
-            call.respond(mapOf(
+            call.respond(HealthDetailedResponse(
-                "status" to if (dbHealth.connected) "healthy" else "unhealthy",
+                status = if (dbHealth.connected) "healthy" else "unhealthy",
-                "version" to "1.0.0",
+                version = ServerConfig.version,
-                "uptime" to ManagementFactory.getRuntimeMXBean().uptime,
+                uptime = ManagementFactory.getRuntimeMXBean().uptime,
-                "timestamp" to System.currentTimeMillis(),
+                timestamp = System.currentTimeMillis(),
-                "database" to dbHealth,
+                database = dbHealth,
-                "blockchain" to blockchainHealth,
+                blockchain = blockchainHealth,
-                "system" to mapOf(
+                system = SystemInfo(memoryUsage, diskSpace),
-                    "memory" to memoryUsage,
+                network = networkStats,
-                    "diskSpace" to diskSpace
-                ),
-                "network" to networkStats,
-                "config" to ServerConfig.getServerInfo()
             ))
             
         } catch (e: Exception) {
@@ -149,11 +146,11 @@ fun Route.healthRoutes() {
     get("/version") {
         try {
             call.respond(mapOf(
-                "version" to "1.0.0",
+                "version" to ServerConfig.version,
-                "buildTime" to System.getProperty("build.time", "unknown"),
+                "buildTime" to ServerConfig.buildTime,
                 "gitCommit" to System.getProperty("git.commit", "unknown"),
                 "javaVersion" to System.getProperty("java.version"),
-                "kotlinVersion" to "2.2.21"
+                // "kotlinVersion" to System.getProperty("kotlin_version").toString()
             ))
             
         } catch (e: Exception) {
@@ -219,57 +216,100 @@ private fun checkBlockchainHealth(): BlockchainHealth {
 }
 
 /** Get memory usage information */
-private fun getMemoryUsage(): Map<String, Any> {
+private fun getMemoryUsage(): MemoryInfo {
     val runtime = Runtime.getRuntime()
     val maxMemory = runtime.maxMemory()
     val totalMemory = runtime.totalMemory()
     val freeMemory = runtime.freeMemory()
     val usedMemory = totalMemory - freeMemory
     
-    return mapOf(
+    return MemoryInfo(
-        "maxMemory" to maxMemory,
+        maxMemory = maxMemory,
-        "totalMemory" to totalMemory,
+        totalMemory = totalMemory,
-        "usedMemory" to usedMemory,
+        usedMemory = usedMemory,
-        "freeMemory" to freeMemory,
+        freeMemory = freeMemory,
-        "usagePercentage" to ((usedMemory.toDouble() / maxMemory) * 100).toInt()
+        usagePercentage = ((usedMemory.toDouble() / maxMemory) * 100).toInt()
     )
 }
 
 /** Get disk space information */
-private fun getDiskSpace(): Map<String, Any> {
+private fun getDiskSpace(): DiskInfo {
     return try {
         val file = java.io.File(".")
         val totalSpace = file.totalSpace
         val freeSpace = file.freeSpace
         val usedSpace = totalSpace - freeSpace
         
-        mapOf(
+        DiskInfo(
-            "totalSpace" to totalSpace,
+            totalSpace = totalSpace,
-            "freeSpace" to freeSpace,
+            freeSpace = freeSpace,
-            "usedSpace" to usedSpace,
+            usedSpace = usedSpace,
-            "usagePercentage" to ((usedSpace.toDouble() / totalSpace) * 100).toInt()
+            usagePercentage = ((usedSpace.toDouble() / totalSpace) * 100).toInt() 
         )
     } catch (e: Exception) {
-        mapOf("error" to "Unable to get disk space information")
+        DiskInfo(0,0,0,0)
     }
 }
 
 /** Get network statistics */
-private fun getNetworkStats(): Map<String, Any> {
+private fun getNetworkStats(): NetworkStats {
     return try {
         val totalBlocks = BlockService.getTotalBlockCount()
         val totalTransactions = TransactionService.getTotalTransactionCount()
         val totalWallets = WalletService.getTotalWalletCount()
         val totalSupply = WalletService.getTotalSupply()
         
-        mapOf(
+        NetworkStats(
-            "totalBlocks" to totalBlocks,
+            totalBlocks = totalBlocks,
-            "totalTransactions" to totalTransactions,
+            totalTransactions = totalTransactions,
-            "totalWallets" to totalWallets,
+            totalWallets = totalWallets,
-            "totalSupply" to totalSupply
+            totalSupply = totalSupply
         )
     } catch (e: Exception) {
-        mapOf("error" to "Unable to get network statistics")
+        NetworkStats(0,0,0,0.0)
     }
 }
 
+@Serializable
+data class HealthDetailedResponse(
+    val status: String,
+    val version: String,
+    val uptime: Long,
+    val timestamp: Long,
+    val database: DatabaseHealth,
+    val blockchain: BlockchainHealth,
+    val system: SystemInfo,
+    val network: NetworkStats,
+    // val config: Map<String, Any>
+)
+
+@Serializable
+data class MemoryInfo(
+    val maxMemory: Long,
+    val totalMemory: Long,
+    val usedMemory: Long,
+    val freeMemory: Long,
+    val usagePercentage: Int
+)
+
+@Serializable
+data class DiskInfo(
+    val totalSpace: Long,
+    val freeSpace: Long,
+    val usedSpace: Long,
+    val usagePercentage: Int
+)
+
+@Serializable
+data class NetworkStats(
+    val totalBlocks: Long,
+    val totalTransactions: Long,
+    val totalWallets: Long,
+    val totalSupply: Double
+)
+
+@Serializable
+data class SystemInfo(
+    val memory: MemoryInfo,
+    val disk: DiskInfo
+)

server/src/main/kotlin/org/ccoin/routes/MiningRoutes.kt

@@ -9,6 +9,7 @@ import org.ccoin.models.StartMiningRequest
 import org.ccoin.models.SubmitMiningRequest
 import org.ccoin.services.MiningService
 import org.ccoin.services.ValidationService
+import kotlinx.serialization.Serializable
 
 fun Route.miningRoutes() {
     route("/mining") {
@@ -128,12 +129,14 @@ fun Route.miningRoutes() {
                 val activeMiners = MiningService.getActiveMinersCount()
                 val difficulty = MiningService.getCurrentDifficulty()
                 
-                call.respond(mapOf(
+                call.respond(
-                    "networkHashRate" to hashRate,
+                    MiningNetworkResponse(
-                    "averageBlockTime" to averageBlockTime,
+                        networkHashRate = hashRate,
-                    "activeMiners" to activeMiners,
+                        averageBlockTime = averageBlockTime,
-                    "currentDifficulty" to difficulty
+                        activeMiners = activeMiners,
-                ))
+                        currentDifficulty = difficulty
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get network statistics")))
@@ -145,16 +148,18 @@ fun Route.miningRoutes() {
             try {
                 val limit = call.request.queryParameters["limit"]?.toIntOrNull() ?: 100
                 
-                if (limit in 0..1000) {
+                if (limit !in 1..1000) {
                     call.respond(HttpStatusCode.BadRequest, mapOf("error" to "Limit must be between 1 and 1000"))
                     return@get
                 }
                 
                 val transactions = MiningService.getPendingTransactionsForMining(limit)
-                call.respond(mapOf(
+                call.respond(
-                    "transactions" to transactions,
+                    MiningPendingTransactionsResponse(
-                    "count" to transactions.size
+                        transactions = transactions,
-                ))
+                        count = transactions.size
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get pending transactions")))
@@ -192,12 +197,14 @@ fun Route.miningRoutes() {
                 }
                 
                 val isValid = MiningService.validateMiningJob(jobId, hash, nonce)
-                call.respond(mapOf(
+                call.respond(
-                    "jobId" to jobId,
+                    MiningValidateResponse(
-                    "hash" to hash,
+                        jobId = jobId,
-                    "nonce" to nonce,
+                        hash = hash,
-                    "isValid" to isValid
+                        nonce = nonce,
-                ))
+                        isValid = isValid
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to validate mining job")))
@@ -209,17 +216,19 @@ fun Route.miningRoutes() {
             try {
                 val limit = call.request.queryParameters["limit"]?.toIntOrNull() ?: 10
                 
-                if (limit in 0..100) {
+                if (limit !in 0..100) {
                     call.respond(HttpStatusCode.BadRequest, mapOf("error" to "Limit must be between 1 and 100"))
                     return@get
                 }
                 
                 // This would need a new service method to get top miners
                 // For now, return a placeholder response
-                call.respond(mapOf(
+                call.respond(
-                    "message" to "Leaderboard endpoint - implementation needed",
+                    MiningLeaderboardResponse(
-                    "limit" to limit
+                        message = "Not implemented",
-                ))
+                        limit = limit
+                    )
+                ) 
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get mining leaderboard")))
@@ -227,3 +236,31 @@ fun Route.miningRoutes() {
         }
     }
 }
+
+@Serializable
+data class MiningNetworkResponse(
+    val networkHashRate: Double,
+    val averageBlockTime: Long,
+    val activeMiners: Int,
+    val currentDifficulty: Int
+)
+
+@Serializable
+data class MiningLeaderboardResponse(
+    val message: String,
+    val limit: Int
+)
+
+@Serializable
+data class MiningValidateResponse(
+    val jobId: String,
+    val hash: String,
+    val nonce: Long,
+    val isValid: Boolean
+)
+
+@Serializable
+data class MiningPendingTransactionsResponse(
+    val transactions: List<String>,
+    val count: Int
+)

server/src/main/kotlin/org/ccoin/routes/TransactionRoutes.kt

@@ -6,8 +6,11 @@ import io.ktor.server.request.*
 import io.ktor.server.response.*
 import io.ktor.server.routing.*
 import org.ccoin.models.SendTransactionRequest
+import org.ccoin.models.TransactionResponse
 import org.ccoin.services.TransactionService
 import org.ccoin.services.ValidationService
+import kotlinx.serialization.Serializable
+import org.ccoin.routes.PaginationInfo
 
 fun Route.transactionRoutes() {
     route("/transaction") {
@@ -99,18 +102,20 @@ fun Route.transactionRoutes() {
                 val transactions = TransactionService.getTransactionHistory(address, pageSize, offset)
                 val totalCount = TransactionService.getTransactionCountForAddress(address)
               
-                call.respond(mapOf(
+                call.respond(
-                    "transactions" to transactions,
+                    TransactionHistoryResponse(
-                    "address" to address,
+                        transactions = transactions,
-                    "pagination" to mapOf(
+                        address = address,
-                        "currentPage" to page,
+                        pagination = PaginationInfo(
-                        "pageSize" to pageSize,
+                            currentPage = page,
-                        "totalItems" to totalCount,
+                            pageSize = pageSize,
-                        "totalPages" to ((totalCount + pageSize - 1) / pageSize),
+                            totalItems = totalCount,
-                        "hasNext" to (offset + pageSize < totalCount),
+                            totalPages = ((totalCount + pageSize - 1) / pageSize),
-                        "hasPrevious" to (page > 1)
+                            hasNext = (offset + pageSize < totalCount),
+                            hasPrevious = (page > 1)
+                        )
+                    )
                 )
-                ))
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get transaction history")))
@@ -121,10 +126,13 @@ fun Route.transactionRoutes() {
         get("/pending") {
             try {
                 val transactions = TransactionService.getPendingTransactions()
-                call.respond(mapOf(
+                
-                    "transactions" to transactions,
+                call.respond(
-                    "count" to transactions.size
+                    TransactionPendingResponse(
-                ))
+                        transactions = transactions,
+                        count = transactions.size
+                    )
+                )
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get pending transactions")))
@@ -208,3 +216,16 @@ fun Route.transactionRoutes() {
         }
     }
 }
+
+@Serializable
+data class TransactionHistoryResponse(
+    val transactions: List<TransactionResponse>,
+    val address: String,
+    val pagination: PaginationInfo
+)
+
+@Serializable
+data class TransactionPendingResponse(
+    val transactions: List<TransactionResponse>,
+    val count: Int
+)

server/src/main/kotlin/org/ccoin/routes/WalletRoutes.kt

@@ -7,15 +7,23 @@ import io.ktor.server.response.*
 import io.ktor.server.routing.*
 import org.ccoin.models.CreateWalletRequest
 import org.ccoin.models.UpdateWalletRequest
+import org.ccoin.models.WalletResponse
 import org.ccoin.services.ValidationService
 import org.ccoin.services.WalletService
+import kotlinx.serialization.Serializable
+import org.ccoin.routes.PaginationInfo
 
 fun Route.walletRoutes() {
     route("/wallet") {
         /** Create a new wallet */
         post("/create") {
             try {
-                val request = call.receive<CreateWalletRequest>()
+                val request = try {
+                    call.receive<CreateWalletRequest>()
+                } catch (e: Exception) {
+                    // If no body or invalid JSON, create with null label
+                    CreateWalletRequest(null)
+                }                
 
                 // Validate input
                 val validation = ValidationService.validateWalletCreation(request.label)
@@ -71,7 +79,7 @@ fun Route.walletRoutes() {
                 }
                 
                 val balance = WalletService.getWalletBalance(address)
-                call.respond(mapOf("address" to address, "balance" to balance))
+                call.respond(WalletBalanceResponse(address, balance))
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.NotFound, mapOf("error" to (e.message ?: "Wallet not found")))
@@ -128,18 +136,16 @@ fun Route.walletRoutes() {
                 val offset = (page - 1) * pageSize
                 val wallets = WalletService.getAllWallets(pageSize, offset)
                 val totalCount = WalletService.getTotalWalletCount()
-                
+                val paginationInfo = PaginationInfo(
-                call.respond(mapOf(
+                    currentPage = page,
-                    "wallets" to wallets,
+                    pageSize = pageSize,
-                    "pagination" to mapOf(
+                    totalItems = totalCount,
-                        "currentPage" to page,
+                    totalPages = (totalCount + pageSize - 1) / pageSize,
-                        "pageSize" to pageSize,
+                    hasNext = offset + pageSize < totalCount,
-                        "totalItems" to totalCount,
+                    hasPrevious = page > 1
-                        "totalPages" to ((totalCount + pageSize - 1) / pageSize),
-                        "hasNext" to (offset + pageSize < totalCount),
-                        "hasPrevious" to (page > 1)
                 )
-                ))
+
+                call.respond(WalletListResponse(wallets, paginationInfo))
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get wallets")))
@@ -157,7 +163,7 @@ fun Route.walletRoutes() {
                 }
                 
                 val wallets = WalletService.getWalletsWithBalance(minBalance)
-                call.respond(mapOf("wallets" to wallets, "minBalance" to minBalance))
+                call.respond(WalletRichResponse(wallets, minBalance))
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to get rich wallets")))
@@ -179,7 +185,7 @@ fun Route.walletRoutes() {
                 }
                 
                 val exists = WalletService.walletExists(address)
-                call.respond(mapOf("address" to address, "exists" to exists))
+                call.respond(WalletExistsResponse(address, exists))
                 
             } catch (e: Exception) {
                 call.respond(HttpStatusCode.InternalServerError, mapOf("error" to (e.message ?: "Failed to check wallet existence")))
@@ -187,3 +193,27 @@ fun Route.walletRoutes() {
         }
     }
 }
+
+@Serializable
+data class WalletListResponse(
+    val wallets: List<WalletResponse>,
+    val pagination: PaginationInfo
+)
+
+@Serializable
+data class WalletRichResponse(
+    val wallets: List<WalletResponse>,
+    val minBalance: Double
+)
+
+@Serializable
+data class WalletExistsResponse(
+    val address: String,
+    val exists: Boolean
+)
+
+@Serializable
+data class WalletBalanceResponse(
+    val address: String,
+    val balance: Double
+)

server/src/main/resources/application.conf

@@ -0,0 +1,9 @@
+ktor {
+    deployment {
+        port = 8080
+        port = ${?PORT}
+    }
+    application {
+        modules = [ org.ccoin.ServerKt.module]
+    }
+}

server/src/main/resources/logback.xml

@@ -0,0 +1,15 @@
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <!-- <pattern>%d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> -->
+            <pattern>%d{MM-dd HH:mm:ss} %-5level - %msg%n</pattern>
+        </encoder>
+    </appender>
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+    <logger name="org.eclipse.jetty" level="INFO"/>
+    <logger name="io.netty" level="INFO"/>
+    <logger name="Exposed" level="INFO"/>
+</configuration>
+