New log buffer (#12357)

* block window utilities

* new buffer (wip)

* integrate log buffer in the provider (wip)

* review fixes:

- comments
- renaming
- new(atomic.Intxx)
- sizeOfWindow(end,start)

* test fix

* clear unused function

* provider integration tests for multiple versions of the buffer

* rename to v1

* fix v1 and add logs

* temp enablement of v1 buffer

* added unit tests

* fix slice alloc

* avoid alloc with cap

* tweak limit values

* config and handle remaining

* trying different config

* fix comparator and block window

* fix redundant import

* sort once instead of maintaining sorted sliced

* align config

* fix tests and set config

* fixes & logs

* custom cla with optmized hook

* lint

* use defer in tests

* update cla version

* Go mod tidy

* alignments

- buffer config
- remove redundant logic in buffer.Dequeue
- remove commented code
- added logs
- renaming
- comments
- remove old rate limiter

* tests

* small fixes in int test

* handle large number of upkeeps (up to max_results)

TODO: handle the case the number is larger than max_results

* update cla version

* tests

* fix logs ordering function to treat tx hash if log index is equal

* Feature flag for new log buffer (#12653)

* feature flag useBufferV1

* changesets

* align enum

* changesets

* Revert "update cla version"

This reverts commit e3c58e5.

* align buffer config

* align buffer metrics

(added label expired)

* update cla version (temp)

* lint

* set feature flag in load test (temp)

* update cla version

* types alignment

* Revert "set feature flag in load test (temp)"

This reverts commit 7b097e5.

* comment

* remove wrong assertion

* alignments:

- log states in buffer
- renaming of vars
- types

* lint

* review

* review:

- result 1 or -1

* normalize compare result

* linked TODOs

* review fix

* lock while SetConfig

* remove redundant defaulting

* align trigger states + comments

* fix func name

---------

Co-authored-by: Fergal Gribben <fergal.gribben@smartcontract.com>

.changeset/pretty-experts-unite.md

@@ -0,0 +1,7 @@
+---
+"chainlink": patch
+---
+
+Added log buffer v1 with improved performance, stability and control over scaling parameters.
+
+Added a feature flag for using log buffer v1.

core/services/ocr2/delegate.go

@@ -59,6 +59,7 @@ import (
 	"github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2keeper"
 	"github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2keeper/evmregistry/v21/autotelemetry21"
 	ocr2keeper21core "github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2keeper/evmregistry/v21/core"
+	"github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2keeper/evmregistry/v21/logprovider"
 	ocr2vrfconfig "github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2vrf/config"
 	ocr2coordinator "github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2vrf/coordinator"
 	"github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2vrf/juelsfeecoin"
@@ -1313,6 +1314,14 @@ func (d *Delegate) newServicesOCR2Keepers21(
 		return nil, errors.New("could not coerce PluginProvider to AutomationProvider")
 	}
 
+	// TODO: (AUTO-9355) remove once we remove v0
+	if useBufferV1 := cfg.UseBufferV1 != nil && *cfg.UseBufferV1; useBufferV1 {
+		logProviderFeatures, ok := keeperProvider.LogEventProvider().(logprovider.LogEventProviderFeatures)
+		if ok {
+			logProviderFeatures.WithBufferVersion("v1")
+		}
+	}
+
 	services, err := ocr2keeper.EVMDependencies21(kb)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not build dependencies for ocr2 keepers")

core/services/ocr2/plugins/ocr2keeper/config.go

@@ -60,6 +60,9 @@ type PluginConfig struct {
 	ContractVersion string `json:"contractVersion"`
 	// CaptureAutomationCustomTelemetry is a bool flag to toggle Custom Telemetry Service
 	CaptureAutomationCustomTelemetry *bool `json:"captureAutomationCustomTelemetry,omitempty"`
+	// UseBufferV1 is a bool flag to toggle the new log buffer implementation
+	// TODO: (AUTO-9355) remove once we have a single version
+	UseBufferV1 *bool `json:"useBufferV1,omitempty"`
 }
 
 func ValidatePluginConfig(cfg PluginConfig) error {