DIDIM 플랫폼 연동 가이드

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import android.content.Context
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import android.provider.Settings
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.withContext
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import java.net.HttpURLConnection
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import java.net.URL
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import java.security.MessageDigest
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class DidimVerification(private val context: Context) {
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    private val apiSecret = BuildConfig.DIDIM_API_SECRET  // 환경변수로 관리
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    private val appId = BuildConfig.DIDIM_APP_ID
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    private val baseUrl = "https://didimapp.com/api/verify-install"
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    suspend fun verifyInstall(): Result<Boolean> = withContext(Dispatchers.IO) {
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        try {
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            val androidId = Settings.Secure.getString(
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                context.contentResolver,
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                Settings.Secure.ANDROID_ID
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            )
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            val packageName = context.packageName
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            val deviceHash = createDeviceHash(androidId, packageName)
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            val deviceInfo = """
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                "androidId": "$androidId",
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                "model": "${android.os.Build.MODEL}",
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                "manufacturer": "${android.os.Build.MANUFACTURER}",
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                "osVersion": "${android.os.Build.VERSION.RELEASE}",
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                "appVersion": "${getAppVersion()}"
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            """.trimIndent()
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            val json = """
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                {
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                    "type": "anonymousDevice",
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                    "appId": "$appId",
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                    "deviceHash": "$deviceHash",
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                    "deviceInfo": { $deviceInfo }
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                }
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            """.trimIndent()
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            val url = URL(baseUrl)
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            val connection = url.openConnection() as HttpURLConnection
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            connection.requestMethod = "POST"
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            connection.setRequestProperty("Content-Type", "application/json")
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            connection.setRequestProperty("Authorization", "Bearer $apiSecret")
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            connection.doOutput = true
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            connection.outputStream.use { os ->
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                os.write(json.toByteArray())
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            }
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            val responseCode = connection.responseCode
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            Result.success(responseCode == 200)
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        } catch (e: Exception) {
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            Result.failure(e)
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        }
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    }
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    private fun createDeviceHash(androidId: String, packageName: String): String {
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        val input = "$androidId$packageName"
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        val bytes = MessageDigest.getInstance("SHA-256").digest(input.toByteArray())
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        return bytes.joinToString("") { "%02x".format(it) }
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    }
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    private fun getAppVersion(): String {
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        return try {
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            context.packageManager.getPackageInfo(context.packageName, 0).versionName ?: "unknown"
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        } catch (e: Exception) {
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            "unknown"
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        }
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    }
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}
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// 사용 예시 (Application.onCreate 또는 MainActivity.onCreate)
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lifecycleScope.launch {
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    val verification = DidimVerification(applicationContext)
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    verification.verifyInstall()
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        .onSuccess { Log.d("DIDIM", "Verification successful") }
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        .onFailure { Log.e("DIDIM", "Verification failed", it) }
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}