core/services/relay/evm: handle error from chainselectors

core/internal/cltest/cltest.go

@@ -212,7 +212,12 @@ type TestApplication struct {
 func NewApplicationEVMDisabled(t *testing.T) *TestApplication {
 	t.Helper()
 
-	c := configtest.NewGeneralConfig(t, nil)
+	c := configtest.NewGeneralConfig(t, func(config *chainlink.Config, secrets *chainlink.Secrets) {
+		f := false
+		for _, c := range config.EVM {
+			c.Enabled = &f
+		}
+	})
 
 	return NewApplicationWithConfig(t, c)
 }

core/services/relay/evm/evm.go

@@ -10,6 +10,7 @@ import (
 	"math/big"
 	"net/http"
 	"strings"
+	"sync"
 
 	"github.com/ethereum/go-ethereum/accounts/abi"
 	"github.com/ethereum/go-ethereum/common"
@@ -149,8 +150,7 @@ type Relayer struct {
 	triggerCapability *triggers.MercuryTriggerService
 
 	// LLO/data streams
-	cdcFactory llo.ChannelDefinitionCacheFactory
-	lloORM     llo.ORM
+	cdcFactory func() (llo.ChannelDefinitionCacheFactory, error)
 }
 
 type CSAETHKeystore interface {
@@ -192,17 +192,21 @@ func NewRelayer(lggr logger.Logger, chain legacyevm.Chain, opts RelayerOpts) (*R
 	sugared := logger.Sugared(lggr).Named("Relayer")
 
 	mercuryORM := mercury.NewORM(opts.DS)
-	chainSelector, err := chainselectors.SelectorFromChainId(chain.ID().Uint64())
-	lloORM := llo.NewORM(opts.DS, chainSelector)
-	cdcFactory := llo.NewChannelDefinitionCacheFactory(sugared, lloORM, chain.LogPoller(), opts.HTTPClient)
+	cdcFactory := sync.OnceValues(func() (llo.ChannelDefinitionCacheFactory, error) {
+		chainSelector, err := chainselectors.SelectorFromChainId(chain.ID().Uint64())
+		if err != nil {
+			return nil, fmt.Errorf("failed to get chain selector for chain id %s: %w", chain.ID(), err)
+		}
+		lloORM := llo.NewORM(opts.DS, chainSelector)
+		return llo.NewChannelDefinitionCacheFactory(sugared, lloORM, chain.LogPoller(), opts.HTTPClient), nil
+	})
 	relayer := &Relayer{
 		ds:                   opts.DS,
 		chain:                chain,
 		lggr:                 sugared,
 		ks:                   opts.CSAETHKeystore,
 		mercuryPool:          opts.MercuryPool,
 		cdcFactory:           cdcFactory,
-		lloORM:               lloORM,
 		mercuryORM:           mercuryORM,
 		transmitterCfg:       opts.TransmitterConfig,
 		capabilitiesRegistry: opts.CapabilitiesRegistry,
@@ -447,7 +451,11 @@ func (r *Relayer) NewLLOProvider(rargs commontypes.RelayArgs, pargs commontypes.
 		transmitter = llo.NewTransmitter(r.lggr, client, privKey.PublicKey)
 	}
 
-	cdc, err := r.cdcFactory.NewCache(lloCfg)
+	cdcFactory, err := r.cdcFactory()
+	if err != nil {
+		return nil, err
+	}
+	cdc, err := cdcFactory.NewCache(lloCfg)
 	if err != nil {
 		return nil, err
 	}