Revert "update logs oracle (#379)" (#383)

This reverts commit 973a4967e3.

src/main/kotlin/io/emeraldpay/dshackle/upstream/LogsOracle.kt

@@ -33,24 +33,12 @@ class LogsOracle(
     }
 
     fun estimate(
-        limit: Long?,
         fromBlock: Long,
         toBlock: Long,
         address: List<String>,
         topics: List<List<String>>,
-    ): Mono<String> {
-        return Mono.fromCallable {
-            try {
-                val estimate = db.Query(limit, fromBlock, toBlock, address, topics)
-                "{\"total\":$estimate,\"overflow\":false}"
-            } catch (e: org.drpc.logsoracle.LogsOracle.LogsOracleException) {
-                if (e.isQueryOverflow()) {
-                    "{\"total\":\"-1\",\"overflow\":true}"
-                } else {
-                    throw e
-                }
-            }
-        }
+    ): Mono<Long> {
+        return Mono.fromCallable { db.Query(fromBlock, toBlock, address, topics) }
             .subscribeOn(scheduler)
     }
 }

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

@@ -183,10 +183,6 @@ class EthereumLocalReader(
 
         val req = params[0] as LinkedHashMap<String, Any?>
 
-        val limit = try { req.get("limit") as Integer? } catch (_: IllegalArgumentException) {
-            throw RpcException(RpcResponseError.CODE_INVALID_METHOD_PARAMS, "Invalid 'limit' parameter")
-        }
-
         val fromBlock = try { parseBlockRef(req.get("fromBlock") as String?) } catch (_: IllegalArgumentException) {
             throw RpcException(RpcResponseError.CODE_INVALID_METHOD_PARAMS, "Invalid 'fromBlock' parameter")
         }
@@ -221,8 +217,8 @@ class EthereumLocalReader(
             throw RpcException(RpcResponseError.CODE_INVALID_METHOD_PARAMS, "Invalid 'topics' parameter")
         }
 
-        return logsOracle.estimate(limit?.toLong() ?: null, fromBlock, toBlock, address, topics)
-            .map { it.toByteArray() to null }
+        return logsOracle.estimate(fromBlock, toBlock, address, topics)
+            .map { "{\"result\":$it}".toByteArray() to null }
     }
 
     private fun parseBlockRef(blockRef: String?): Long {