Log index validator (#699)

* log index validator - wip

* fix: Handle edge cases in LogIndexValidator and fix GitHub Actions

gix critical edge case: when first transaction has no logs, second transaction starting at logIndex=0 is VALID behavior
 null handling
fix  'repo_token' parameter

* - Use Mono.empty() instead of Mono.just(null)
- Use defaultIfEmpty for handling empty results

* wip : add tests for LogIndexValidator

* test fixes

* fix: Fix ktlint issues in LogIndexValidatorTest

- Remove wildcard import
- Fix trailing spaces
- Add missing trailing commas
- Fix import order
- Add newline at end of file

* add disable option

* add logs for error case

* save prevState on doOnNext

* also check for first tx log index order

* add not continius indexes test

* make code thread safe

* use upstream.getHead

* search CHECK_TX_COUNT instead of 0 and 1 indexes

* refactor double rpc call

foundation/src/main/kotlin/io/emeraldpay/dshackle/foundation/ChainOptions.kt

@@ -19,6 +19,7 @@ class ChainOptions {
         val disableLivenessSubscriptionValidation: Boolean,
         val disableBoundValidation: Boolean = false,
         val valdateErigonBug: Boolean,
+        val disableLogIndexValidation: Boolean = false,
     )
 
     data class DefaultOptions(
@@ -41,7 +42,8 @@ class ChainOptions {
         var callLimitSize: Int? = null,
         var disableLivenessSubscriptionValidation: Boolean? = null,
         var disableBoundValidation: Boolean? = null,
-        var validateErigonBug: Boolean? = null
+        var validateErigonBug: Boolean? = null,
+        var disableLogIndexValidation: Boolean? = null
     ) {
         companion object {
             @JvmStatic
@@ -73,6 +75,7 @@ class ChainOptions {
             copy.disableLivenessSubscriptionValidation = overwrites.disableLivenessSubscriptionValidation ?: this.disableLivenessSubscriptionValidation
             copy.disableBoundValidation = overwrites.disableBoundValidation ?: this.disableBoundValidation
             copy.validateErigonBug = overwrites.validateErigonBug ?: this.validateErigonBug
+            copy.disableLogIndexValidation = overwrites.disableLogIndexValidation ?: this.disableLogIndexValidation
             return copy
         }
 
@@ -93,6 +96,7 @@ class ChainOptions {
                 this.disableLivenessSubscriptionValidation ?: false,
                 this.disableBoundValidation ?: false,
                 this.validateErigonBug ?: true,
+                this.disableLogIndexValidation ?: false,
             )
     }
 }

foundation/src/main/kotlin/io/emeraldpay/dshackle/foundation/ChainOptionsReader.kt

@@ -58,6 +58,9 @@ class ChainOptionsReader : YamlConfigReader<ChainOptions.PartialOptions>() {
         getValueAsBool(values, "disable-bound-validation")?.let {
             options.disableBoundValidation = it
         }
+        getValueAsBool(values, "disable-log-index-validation")?.let {
+            options.disableLogIndexValidation = it
+        }
         return options
     }
 }