Gas limit estimation feature

.changeset/loud-windows-call.md

@@ -0,0 +1,5 @@
+---
+"chainlink": minor
+---
+
+Added gas limit estimation feature to EVM gas estimators #added

common/fee/models.go

@@ -14,6 +14,7 @@ var (
 	ErrBumpFeeExceedsLimit = errors.New("fee bump exceeds limit")
 	ErrBump                = errors.New("fee bump failed")
 	ErrConnectivity        = errors.New("transaction propagation issue: transactions are not being mined")
+	ErrFeeLimitTooLow      = errors.New("provided fee limit too low")
 )
 
 func IsBumpErr(err error) bool {

common/txmgr/broadcaster.go

@@ -20,6 +20,7 @@ import (
 	"github.com/smartcontractkit/chainlink-common/pkg/utils"
 
 	"github.com/smartcontractkit/chainlink/v2/common/client"
+	commonfee "github.com/smartcontractkit/chainlink/v2/common/fee"
 	feetypes "github.com/smartcontractkit/chainlink/v2/common/fee/types"
 	txmgrtypes "github.com/smartcontractkit/chainlink/v2/common/txmgr/types"
 	"github.com/smartcontractkit/chainlink/v2/common/types"
@@ -434,7 +435,11 @@ func (eb *Broadcaster[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, SEQ, FEE]) hand
 	}
 
 	attempt, _, _, retryable, err := eb.NewTxAttempt(ctx, *etx, eb.lggr)
-	if err != nil {
+	// Mark transaction as fatal if provided gas limit is set too low
+	if errors.Is(err, commonfee.ErrFeeLimitTooLow) {
+		etx.Error = null.StringFrom(commonfee.ErrFeeLimitTooLow.Error())
+		return eb.saveFatallyErroredTransaction(eb.lggr, etx), false
+	} else if err != nil {
 		return fmt.Errorf("processUnstartedTxs failed on NewAttempt: %w", err), retryable
 	}
 

core/capabilities/ccip/ocrimpls/contract_transmitter_test.go

@@ -613,6 +613,7 @@ func (g *TestGasEstimatorConfig) LimitJobType() evmconfig.LimitJobType {
 func (g *TestGasEstimatorConfig) PriceMaxKey(addr common.Address) *assets.Wei {
 	return assets.GWei(1)
 }
+func (g *TestGasEstimatorConfig) EstimateGasLimit() bool      { return false }
 
 func (e *TestEvmConfig) GasEstimator() evmconfig.GasEstimator {
 	return &TestGasEstimatorConfig{bumpThreshold: e.BumpThreshold}

core/chains/evm/config/chain_scoped_gas_estimator.go

@@ -108,6 +108,10 @@ func (g *gasEstimatorConfig) LimitJobType() LimitJobType {
 	return &limitJobTypeConfig{c: g.c.LimitJobType}
 }
 
+func (g *gasEstimatorConfig) EstimateGasLimit() bool {
+	return *g.c.EstimateGasLimit
+}
+
 type limitJobTypeConfig struct {
 	c toml.GasLimitJobType
 }

core/chains/evm/config/config.go

@@ -136,6 +136,7 @@ type GasEstimator interface {
 	PriceMin() *assets.Wei
 	Mode() string
 	PriceMaxKey(gethcommon.Address) *assets.Wei
+	EstimateGasLimit() bool
 }
 
 type LimitJobType interface {

core/chains/evm/config/toml/config.go

@@ -549,11 +549,12 @@ type GasEstimator struct {
 	PriceMax     *assets.Wei
 	PriceMin     *assets.Wei
 
-	LimitDefault    *uint64
-	LimitMax        *uint64
-	LimitMultiplier *decimal.Decimal
-	LimitTransfer   *uint64
-	LimitJobType    GasLimitJobType `toml:",omitempty"`
+	LimitDefault       *uint64
+	LimitMax           *uint64
+	LimitMultiplier    *decimal.Decimal
+	LimitTransfer      *uint64
+	LimitJobType       GasLimitJobType `toml:",omitempty"`
+	EstimateGasLimit   *bool
 
 	BumpMin       *assets.Wei
 	BumpPercent   *uint16
@@ -641,6 +642,9 @@ func (e *GasEstimator) setFrom(f *GasEstimator) {
 	if v := f.LimitTransfer; v != nil {
 		e.LimitTransfer = v
 	}
+	if v := f.EstimateGasLimit; v != nil {
+		e.EstimateGasLimit = v
+	}
 	if v := f.PriceDefault; v != nil {
 		e.PriceDefault = v
 	}

core/chains/evm/config/toml/defaults/fallback.toml

@@ -47,6 +47,7 @@ EIP1559DynamicFees = false
 FeeCapDefault = '100 gwei'
 TipCapDefault = '1'
 TipCapMin = '1'
+EstimateGasLimit = false
 
 [GasEstimator.BlockHistory]
 BatchSize = 25

core/chains/evm/gas/helpers_test.go

@@ -157,6 +157,7 @@ type MockGasEstimatorConfig struct {
 	FeeCapDefaultF      *assets.Wei
 	LimitMaxF           uint64
 	ModeF               string
+	EstimateGasLimitF   bool
 }
 
 func NewMockGasConfig() *MockGasEstimatorConfig {
@@ -214,3 +215,7 @@ func (m *MockGasEstimatorConfig) LimitMax() uint64 {
 func (m *MockGasEstimatorConfig) Mode() string {
 	return m.ModeF
 }
+
+func (m *MockGasEstimatorConfig) EstimateGasLimit() bool {
+	return m.EstimateGasLimitF
+}