Fix archive detection (#310)

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumArchiveBlockNumberReader.kt

@@ -1,11 +1,16 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
+import io.emeraldpay.dshackle.Chain
 import io.emeraldpay.dshackle.reader.JsonRpcReader
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
 import io.emeraldpay.etherjar.hex.HexQuantity
 import reactor.core.publisher.Mono
 
+private const val ARBITRUM_NITRO_BLOCK = "0x152DD47" // 22207815
+private const val OPTIMISM_BEDROCK_BLOCK = "0x645C277" // 105235063
+private const val EARLIEST_BLOCK = "0x2710" // 10000
+
 class EthereumArchiveBlockNumberReader(
     private val reader: JsonRpcReader,
 ) {
@@ -19,4 +24,12 @@ class EthereumArchiveBlockNumberReader(
                         String(it).substring(3, it.size - 1).toLong(radix = 16) - 10_000, // this is definitely archive
                     ).toHex()
             }
+
+    fun readEarliestBlock(chain: Chain): Mono<String> {
+        return when (chain) {
+            Chain.ARBITRUM__MAINNET -> ARBITRUM_NITRO_BLOCK
+            Chain.OPTIMISM__MAINNET -> OPTIMISM_BEDROCK_BLOCK
+            else -> EARLIEST_BLOCK
+        }.run { Mono.just(this) }
+    }
 }

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumLikeRpcUpstream.kt

@@ -53,7 +53,7 @@ open class EthereumLikeRpcUpstream(
 ) : EthereumLikeUpstream(id, hash, options, role, targets, node, chainConfig), Lifecycle, Upstream, CachesEnabled {
     private val validator: EthereumUpstreamValidator = EthereumUpstreamValidator(chain, this, getOptions(), chainConfig.callLimitContract)
     protected val connector: EthereumConnector = connectorFactory.create(this, validator, chain, skipEnhance)
-    private val labelsDetector = EthereumLabelsDetector(this.getIngressReader())
+    private val labelsDetector = EthereumLabelsDetector(this.getIngressReader(), chain)
     private var hasLiveSubscriptionHead: AtomicBoolean = AtomicBoolean(false)
 
     private var validatorSubscription: Disposable? = null

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/EthereumLabelsDetector.kt

@@ -2,6 +2,7 @@ package io.emeraldpay.dshackle.upstream.ethereum.subscribe
 
 import com.fasterxml.jackson.databind.JsonNode
 import com.fasterxml.jackson.module.kotlin.readValue
+import io.emeraldpay.dshackle.Chain
 import io.emeraldpay.dshackle.Global.Companion.objectMapper
 import io.emeraldpay.dshackle.reader.JsonRpcReader
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumArchiveBlockNumberReader
@@ -12,7 +13,9 @@ import reactor.core.publisher.Mono
 
 class EthereumLabelsDetector(
     private val reader: JsonRpcReader,
+    private val chain: Chain,
 ) {
+    private val blockNumberReader = EthereumArchiveBlockNumberReader(reader)
 
     fun detectLabels(): Flux<Pair<String, String>> {
         return Flux.merge(
@@ -39,21 +42,23 @@ class EthereumLabelsDetector(
     }
 
     private fun detectArchiveNode(): Mono<Pair<String, String>> {
-        return EthereumArchiveBlockNumberReader(reader)
-            .readArchiveBlock()
-            .flatMap {
-                reader.read(
-                    JsonRpcRequest(
-                        "eth_getBalance",
-                        listOf("0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0", it),
-                    ),
-                )
-            }
-            .flatMap(JsonRpcResponse::requireResult)
+        return Mono.zip(
+            blockNumberReader.readEarliestBlock(chain).flatMap { haveBalance(it) },
+            blockNumberReader.readArchiveBlock().flatMap { haveBalance(it) },
+        )
             .map { "archive" to "true" }
             .onErrorResume { Mono.empty() }
     }
 
+    private fun haveBalance(blockNumber: String): Mono<ByteArray> {
+        return reader.read(
+            JsonRpcRequest(
+                "eth_getBalance",
+                listOf("0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0", blockNumber),
+            ),
+        ).flatMap(JsonRpcResponse::requireResult)
+    }
+
     private fun nodeType(nodeType: String): String? {
         return if (nodeType.contains("erigon", true)) {
             "erigon"

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/EthereumLabelsDetectorSpec.groovy

@@ -1,5 +1,6 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
+import io.emeraldpay.dshackle.Chain
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.test.ApiReaderMock
 import io.emeraldpay.dshackle.test.TestingCommons
@@ -23,9 +24,10 @@ class EthereumLabelsDetectorSpec extends Specification {
                     answer("web3_clientVersion", [], response)
                     answer("eth_blockNumber", [], "0x10df3e5")
                     answer("eth_getBalance", ["0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0", "0x10dccd5"], "")
+                    answer("eth_getBalance", ["0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0", "0x2710"], "")
                 }
         )
-        def detector = new EthereumLabelsDetector(up.getIngressReader())
+        def detector = new EthereumLabelsDetector(up.getIngressReader(), Chain.ETHEREUM__MAINNET)
 
         when:
         def act = detector.detectLabels()
@@ -55,9 +57,11 @@ class EthereumLabelsDetectorSpec extends Specification {
                         Mono.just(new JsonRpcResponse("\"0x10df3e5\"".getBytes(), null))
                 1 * read(new JsonRpcRequest("eth_getBalance", ["0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0", "0x10dccd5"])) >>
                         Mono.error(new RuntimeException())
+                1 * read(new JsonRpcRequest("eth_getBalance", ["0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0", "0x2710"])) >>
+                        Mono.just(new JsonRpcResponse("".getBytes(), null))
             }
         }
-        def detector = new EthereumLabelsDetector(up.getIngressReader())
+        def detector = new EthereumLabelsDetector(up.getIngressReader(), Chain.ETHEREUM__MAINNET)
         when:
         def act = detector.detectLabels()
         then: