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Try to use all RPC hosts for BSC iteratively if a host doesn't respond #205

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merged 1 commit into from
Dec 9, 2021
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Try to use all RPC hosts for BSC iteratively if a host doesn't respond #205

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Try to use all RPC hosts for BSC iteratively if a host doesn't respond
  • Loading branch information
@omurovch
omurovch committed Dec 9, 2021
commit 4efbf45b2fbbba57fcb082e242466f8776e5fb7a
39 changes: 26 additions & 13 deletions ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/api/core/NodeApiProvider.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ import java.net.URL
import java.util.logging.Logger

class NodeApiProvider(
private val url: URL,
private val urls: List<URL>,
override val blockTime: Long,
private val gson: Gson,
auth: String? = null
Expand All @@ -30,11 +30,8 @@ class NodeApiProvider(
private val service: InfuraService

init {
val loggingInterceptor = HttpLoggingInterceptor(object : HttpLoggingInterceptor.Logger {
override fun log(message: String) {
logger.info(message)
}
}).setLevel(HttpLoggingInterceptor.Level.BASIC)
val loggingInterceptor = HttpLoggingInterceptor { message -> logger.info(message) }
.setLevel(HttpLoggingInterceptor.Level.BASIC)

val headersInterceptor = Interceptor { chain ->
val requestBuilder = chain.request().newBuilder()
Expand All @@ -49,7 +46,7 @@ class NodeApiProvider(
.addInterceptor(headersInterceptor)

val retrofit = Retrofit.Builder()
.baseUrl("$url/")
.baseUrl("${urls.first()}/")
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.addConverterFactory(ScalarsConverterFactory.create())
.addConverterFactory(GsonConverterFactory.create(gson))
Expand All @@ -59,19 +56,35 @@ class NodeApiProvider(
service = retrofit.create(InfuraService::class.java)
}

override val source: String = url.host
override val source: String = urls.first().host

override fun <T> single(rpc: JsonRpc<T>): Single<T> =
Single.create { emitter ->
var error: Throwable = ApiProviderError.ApiUrlNotFound

override fun <T> single(rpc: JsonRpc<T>): Single<T> {
return service.single(url.toURI(), gson.toJson(rpc))
.map { response ->
rpc.parseResponse(response, gson)
urls.forEach { url ->
try {
val response = service.single(url.toURI(), gson.toJson(rpc))
.map { response -> rpc.parseResponse(response, gson) }
.blockingGet()

emitter.onSuccess(response)
return@create
} catch (throwable: Throwable) {
error = throwable
}
}
}
emitter.onError(error)
}

private interface InfuraService {
@POST
@Headers("Content-Type: application/json", "Accept: application/json")
fun single(@Url uri: URI, @Body jsonRpc: String): Single<RpcResponse>
}

sealed class ApiProviderError : Throwable() {
object ApiUrlNotFound : ApiProviderError()
}

}
22 changes: 18 additions & 4 deletions ethereumkit/src/main/java/io/horizontalsystems/ethereumkit/core/EthereumKit.kt
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Expand Up @@ -370,7 +370,7 @@ class EthereumKit(
webSocketRpcSyncer
}
is SyncSource.Http -> {
val apiProvider = NodeApiProvider(syncSource.url, syncSource.blockTime, gson, syncSource.auth)
val apiProvider = NodeApiProvider(syncSource.urls, syncSource.blockTime, gson, syncSource.auth)
ApiRpcSyncer(apiProvider, connectionManager)
}
}
Expand Down Expand Up @@ -470,15 +470,29 @@ class EthereumKit(
fun infuraHttpSyncSource(networkType: NetworkType, projectId: String, projectSecret: String?): SyncSource? =
infuraDomain(networkType)?.let { infuraDomain ->
val url = URL("https://$infuraDomain/v3/$projectId")
SyncSource.Http(url, networkType.blockTime, projectSecret)
SyncSource.Http(listOf(url), networkType.blockTime, projectSecret)
}

fun defaultBscWebSocketSyncSource(): SyncSource =
SyncSource.WebSocket(URL("https://bsc-ws-node.nariox.org:443"), null)


fun defaultBscHttpSyncSource(): SyncSource =
SyncSource.Http(URL("https://bsc-dataseed.binance.org"), NetworkType.BscMainNet.blockTime, null)
SyncSource.Http(listOf(
URL("https://bsc-dataseed.binance.org"),
URL("https://bsc-dataseed1.defibit.io"),
URL("https://bsc-dataseed1.ninicoin.io"),
URL("https://bsc-dataseed2.defibit.io"),
URL("https://bsc-dataseed3.defibit.io"),
URL("https://bsc-dataseed4.defibit.io"),
URL("https://bsc-dataseed2.ninicoin.io"),
URL("https://bsc-dataseed3.ninicoin.io"),
URL("https://bsc-dataseed4.ninicoin.io"),
URL("https://bsc-dataseed1.binance.org"),
URL("https://bsc-dataseed2.binance.org"),
URL("https://bsc-dataseed3.binance.org"),
URL("https://bsc-dataseed4.binance.org")),
NetworkType.BscMainNet.blockTime, null)

private fun infuraDomain(networkType: NetworkType): String? =
when (networkType) {
Expand All @@ -499,7 +513,7 @@ class EthereumKit(

sealed class SyncSource {
class WebSocket(val url: URL, val auth: String?) : SyncSource()
class Http(val url: URL, val blockTime: Long, val auth: String?) : SyncSource()
class Http(val urls: List<URL>, val blockTime: Long, val auth: String?) : SyncSource()
}

enum class NetworkType(
Expand Down