diff --git a/common/txmgr/confirmer.go b/common/txmgr/confirmer.go
index f10481fef56..d55f982c11f 100644
--- a/common/txmgr/confirmer.go
+++ b/common/txmgr/confirmer.go
@@ -14,10 +14,11 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"go.uber.org/multierr"
 
+	commonhex "github.com/smartcontractkit/chainlink-common/pkg/utils/hex"
+
 	"github.com/smartcontractkit/chainlink-common/pkg/chains/label"
 	"github.com/smartcontractkit/chainlink-common/pkg/logger"
 	"github.com/smartcontractkit/chainlink-common/pkg/services"
-	commonhex "github.com/smartcontractkit/chainlink-common/pkg/utils/hex"
 	"github.com/smartcontractkit/chainlink-common/pkg/utils/mailbox"
 
 	"github.com/smartcontractkit/chainlink/v2/common/client"
diff --git a/core/internal/features/ocr2/features_ocr2_test.go b/core/internal/features/ocr2/features_ocr2_test.go
index e3b6c1a24d1..7090da1dd4b 100644
--- a/core/internal/features/ocr2/features_ocr2_test.go
+++ b/core/internal/features/ocr2/features_ocr2_test.go
@@ -187,50 +187,62 @@ func setupNodeOCR2(
 
 func TestIntegration_OCR2(t *testing.T) {
 	t.Parallel()
-	owner, b, ocrContractAddress, ocrContract := setupOCR2Contracts(t)
 
-	lggr := logger.TestLogger(t)
-	bootstrapNodePort := freeport.GetOne(t)
-	bootstrapNode := setupNodeOCR2(t, owner, bootstrapNodePort, false /* useForwarders */, b, nil)
-
-	var (
-		oracles      []confighelper2.OracleIdentityExtra
-		transmitters []common.Address
-		kbs          []ocr2key.KeyBundle
-		apps         []*cltest.TestApplication
-	)
-	ports := freeport.GetN(t, 4)
-	for i := 0; i < 4; i++ {
-		node := setupNodeOCR2(t, owner, ports[i], false /* useForwarders */, b, []commontypes.BootstrapperLocator{
-			// Supply the bootstrap IP and port as a V2 peer address
-			{PeerID: bootstrapNode.peerID, Addrs: []string{fmt.Sprintf("127.0.0.1:%d", bootstrapNodePort)}},
-		})
-
-		kbs = append(kbs, node.keybundle)
-		apps = append(apps, node.app)
-		transmitters = append(transmitters, node.transmitter)
-
-		oracles = append(oracles, confighelper2.OracleIdentityExtra{
-			OracleIdentity: confighelper2.OracleIdentity{
-				OnchainPublicKey:  node.keybundle.PublicKey(),
-				TransmitAccount:   ocrtypes2.Account(node.transmitter.String()),
-				OffchainPublicKey: node.keybundle.OffchainPublicKey(),
-				PeerID:            node.peerID,
-			},
-			ConfigEncryptionPublicKey: node.keybundle.ConfigEncryptionPublicKey(),
-		})
-	}
+	for _, test := range []struct {
+		name                string
+		chainReaderAndCodec bool
+	}{
+		{"legacy", false},
+		{"chain-reader", true},
+	} {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			owner, b, ocrContractAddress, ocrContract := setupOCR2Contracts(t)
+
+			lggr := logger.TestLogger(t)
+			bootstrapNodePort := freeport.GetOne(t)
+			bootstrapNode := setupNodeOCR2(t, owner, bootstrapNodePort, false /* useForwarders */, b, nil)
+
+			var (
+				oracles      []confighelper2.OracleIdentityExtra
+				transmitters []common.Address
+				kbs          []ocr2key.KeyBundle
+				apps         []*cltest.TestApplication
+			)
+			ports := freeport.GetN(t, 4)
+			for i := 0; i < 4; i++ {
+				node := setupNodeOCR2(t, owner, ports[i], false /* useForwarders */, b, []commontypes.BootstrapperLocator{
+					// Supply the bootstrap IP and port as a V2 peer address
+					{PeerID: bootstrapNode.peerID, Addrs: []string{fmt.Sprintf("127.0.0.1:%d", bootstrapNodePort)}},
+				})
+
+				kbs = append(kbs, node.keybundle)
+				apps = append(apps, node.app)
+				transmitters = append(transmitters, node.transmitter)
+
+				oracles = append(oracles, confighelper2.OracleIdentityExtra{
+					OracleIdentity: confighelper2.OracleIdentity{
+						OnchainPublicKey:  node.keybundle.PublicKey(),
+						TransmitAccount:   ocrtypes2.Account(node.transmitter.String()),
+						OffchainPublicKey: node.keybundle.OffchainPublicKey(),
+						PeerID:            node.peerID,
+					},
+					ConfigEncryptionPublicKey: node.keybundle.ConfigEncryptionPublicKey(),
+				})
+			}
 
-	tick := time.NewTicker(1 * time.Second)
-	defer tick.Stop()
-	go func() {
-		for range tick.C {
-			b.Commit()
-		}
-	}()
+			tick := time.NewTicker(1 * time.Second)
+			defer tick.Stop()
+			go func() {
+				for range tick.C {
+					b.Commit()
+				}
+			}()
 
-	blockBeforeConfig := initOCR2(t, lggr, b, ocrContract, owner, bootstrapNode, oracles, transmitters, transmitters, func(blockNum int64) string {
-		return fmt.Sprintf(`
+			blockBeforeConfig := initOCR2(t, lggr, b, ocrContract, owner, bootstrapNode, oracles, transmitters, transmitters, func(blockNum int64) string {
+				return fmt.Sprintf(`
 type				= "bootstrap"
 name				= "bootstrap"
 relay				= "evm"
@@ -240,54 +252,71 @@ contractID			= "%s"
 chainID 			= 1337
 fromBlock = %d
 `, ocrContractAddress, blockNum)
-	})
-
-	var jids []int32
-	var servers, slowServers = make([]*httptest.Server, 4), make([]*httptest.Server, 4)
-	// We expect metadata of:
-	//  latestAnswer:nil // First call
-	//  latestAnswer:0
-	//  latestAnswer:10
-	//  latestAnswer:20
-	//  latestAnswer:30
-	var metaLock sync.Mutex
-	expectedMeta := map[string]struct{}{
-		"0": {}, "10": {}, "20": {}, "30": {},
-	}
-	for i := 0; i < 4; i++ {
-		s := i
-		require.NoError(t, apps[i].Start(testutils.Context(t)))
-
-		// API speed is > observation timeout set in ContractSetConfigArgsForIntegrationTest
-		slowServers[i] = httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
-			time.Sleep(5 * time.Second)
-			res.WriteHeader(http.StatusOK)
-			_, err := res.Write([]byte(`{"data":10}`))
-			require.NoError(t, err)
-		}))
-		t.Cleanup(slowServers[s].Close)
-		servers[i] = httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
-			b, err := io.ReadAll(req.Body)
-			require.NoError(t, err)
-			var m bridges.BridgeMetaDataJSON
-			require.NoError(t, json.Unmarshal(b, &m))
-			if m.Meta.LatestAnswer != nil && m.Meta.UpdatedAt != nil {
-				metaLock.Lock()
-				delete(expectedMeta, m.Meta.LatestAnswer.String())
-				metaLock.Unlock()
+			})
+
+			var jids []int32
+			var servers, slowServers = make([]*httptest.Server, 4), make([]*httptest.Server, 4)
+			// We expect metadata of:
+			//  latestAnswer:nil // First call
+			//  latestAnswer:0
+			//  latestAnswer:10
+			//  latestAnswer:20
+			//  latestAnswer:30
+			var metaLock sync.Mutex
+			expectedMeta := map[string]struct{}{
+				"0": {}, "10": {}, "20": {}, "30": {},
 			}
-			res.WriteHeader(http.StatusOK)
-			_, err = res.Write([]byte(`{"data":10}`))
-			require.NoError(t, err)
-		}))
-		t.Cleanup(servers[s].Close)
-		u, _ := url.Parse(servers[i].URL)
-		require.NoError(t, apps[i].BridgeORM().CreateBridgeType(&bridges.BridgeType{
-			Name: bridges.BridgeName(fmt.Sprintf("bridge%d", i)),
-			URL:  models.WebURL(*u),
-		}))
-
-		ocrJob, err := validate.ValidatedOracleSpecToml(apps[i].Config.OCR2(), apps[i].Config.Insecure(), fmt.Sprintf(`
+			returnData := int(10)
+			for i := 0; i < 4; i++ {
+				s := i
+				require.NoError(t, apps[i].Start(testutils.Context(t)))
+
+				// API speed is > observation timeout set in ContractSetConfigArgsForIntegrationTest
+				slowServers[i] = httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
+					time.Sleep(5 * time.Second)
+					var result string
+					metaLock.Lock()
+					result = fmt.Sprintf(`{"data":%d}`, returnData)
+					metaLock.Unlock()
+					res.WriteHeader(http.StatusOK)
+					t.Logf("Slow Bridge %d returning data:10", s)
+					_, err := res.Write([]byte(result))
+					require.NoError(t, err)
+				}))
+				t.Cleanup(slowServers[s].Close)
+				servers[i] = httptest.NewServer(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
+					b, err := io.ReadAll(req.Body)
+					require.NoError(t, err)
+					var m bridges.BridgeMetaDataJSON
+					require.NoError(t, json.Unmarshal(b, &m))
+					var result string
+					metaLock.Lock()
+					result = fmt.Sprintf(`{"data":%d}`, returnData)
+					metaLock.Unlock()
+					if m.Meta.LatestAnswer != nil && m.Meta.UpdatedAt != nil {
+						t.Logf("Bridge %d deleting %s, from request body: %s", s, m.Meta.LatestAnswer, b)
+						metaLock.Lock()
+						delete(expectedMeta, m.Meta.LatestAnswer.String())
+						metaLock.Unlock()
+					}
+					res.WriteHeader(http.StatusOK)
+					_, err = res.Write([]byte(result))
+					require.NoError(t, err)
+				}))
+				t.Cleanup(servers[s].Close)
+				u, _ := url.Parse(servers[i].URL)
+				require.NoError(t, apps[i].BridgeORM().CreateBridgeType(&bridges.BridgeType{
+					Name: bridges.BridgeName(fmt.Sprintf("bridge%d", i)),
+					URL:  models.WebURL(*u),
+				}))
+
+				var chainReaderSpec string
+				if test.chainReaderAndCodec {
+					chainReaderSpec = `
+chainReader = '{"chainContractReaders":{"median":{"contractABI":"[{\"inputs\":[{\"internalType\":\"contractLinkTokenInterface\",\"name\":\"link\",\"type\":\"address\"},{\"internalType\":\"int192\",\"name\":\"minAnswer_\",\"type\":\"int192\"},{\"internalType\":\"int192\",\"name\":\"maxAnswer_\",\"type\":\"int192\"},{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"billingAccessController\",\"type\":\"address\"},{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"requesterAccessController\",\"type\":\"address\"},{\"internalType\":\"uint8\",\"name\":\"decimals_\",\"type\":\"uint8\"},{\"internalType\":\"string\",\"name\":\"description_\",\"type\":\"string\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"int256\",\"name\":\"current\",\"type\":\"int256\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"updatedAt\",\"type\":\"uint256\"}],\"name\":\"AnswerUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"old\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"current\",\"type\":\"address\"}],\"name\":\"BillingAccessControllerSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"maximumGasPriceGwei\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"reasonableGasPriceGwei\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"observationPaymentGjuels\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"transmissionPaymentGjuels\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint24\",\"name\":\"accountingGas\",\"type\":\"uint24\"}],\"name\":\"BillingSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"previousConfigBlockNumber\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"configDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint64\",\"name\":\"configCount\",\"type\":\"uint64\"},{\"indexed\":false,\"internalType\":\"address[]\",\"name\":\"signers\",\"type\":\"address[]\"},{\"indexed\":false,\"internalType\":\"address[]\",\"name\":\"transmitters\",\"type\":\"address[]\"},{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"f\",\"type\":\"uint8\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"onchainConfig\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"uint64\",\"name\":\"offchainConfigVersion\",\"type\":\"uint64\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"offchainConfig\",\"type\":\"bytes\"}],\"name\":\"ConfigSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"contractLinkTokenInterface\",\"name\":\"oldLinkToken\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"contractLinkTokenInterface\",\"name\":\"newLinkToken\",\"type\":\"address\"}],\"name\":\"LinkTokenSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"startedBy\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"startedAt\",\"type\":\"uint256\"}],\"name\":\"NewRound\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint32\",\"name\":\"aggregatorRoundId\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"int192\",\"name\":\"answer\",\"type\":\"int192\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"observationsTimestamp\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"int192[]\",\"name\":\"observations\",\"type\":\"int192[]\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"observers\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"int192\",\"name\":\"juelsPerFeeCoin\",\"type\":\"int192\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"configDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint40\",\"name\":\"epochAndRound\",\"type\":\"uint40\"}],\"name\":\"NewTransmission\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"payee\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"contractLinkTokenInterface\",\"name\":\"linkToken\",\"type\":\"address\"}],\"name\":\"OraclePaid\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"OwnershipTransferRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"current\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"proposed\",\"type\":\"address\"}],\"name\":\"PayeeshipTransferRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previous\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"current\",\"type\":\"address\"}],\"name\":\"PayeeshipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"old\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"current\",\"type\":\"address\"}],\"name\":\"RequesterAccessControllerSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"requester\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"configDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"round\",\"type\":\"uint8\"}],\"name\":\"RoundRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"configDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"}],\"name\":\"Transmitted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"previousValidator\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"previousGasLimit\",\"type\":\"uint32\"},{\"indexed\":true,\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"currentValidator\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"currentGasLimit\",\"type\":\"uint32\"}],\"name\":\"ValidatorConfigSet\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"acceptOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"}],\"name\":\"acceptPayeeship\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"description\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"}],\"name\":\"getAnswer\",\"outputs\":[{\"internalType\":\"int256\",\"name\":\"\",\"type\":\"int256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getBilling\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"maximumGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"reasonableGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"observationPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"transmissionPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint24\",\"name\":\"accountingGas\",\"type\":\"uint24\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getBillingAccessController\",\"outputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getLinkToken\",\"outputs\":[{\"internalType\":\"contractLinkTokenInterface\",\"name\":\"linkToken\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getRequesterAccessController\",\"outputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint80\",\"name\":\"roundId\",\"type\":\"uint80\"}],\"name\":\"getRoundData\",\"outputs\":[{\"internalType\":\"uint80\",\"name\":\"roundId_\",\"type\":\"uint80\"},{\"internalType\":\"int256\",\"name\":\"answer\",\"type\":\"int256\"},{\"internalType\":\"uint256\",\"name\":\"startedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"updatedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint80\",\"name\":\"answeredInRound\",\"type\":\"uint80\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"}],\"name\":\"getTimestamp\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getTransmitters\",\"outputs\":[{\"internalType\":\"address[]\",\"name\":\"\",\"type\":\"address[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getValidatorConfig\",\"outputs\":[{\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"validator\",\"type\":\"address\"},{\"internalType\":\"uint32\",\"name\":\"gasLimit\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestAnswer\",\"outputs\":[{\"internalType\":\"int256\",\"name\":\"\",\"type\":\"int256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestConfigDetails\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"configCount\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"blockNumber\",\"type\":\"uint32\"},{\"internalType\":\"bytes32\",\"name\":\"configDigest\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestConfigDigestAndEpoch\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"scanLogs\",\"type\":\"bool\"},{\"internalType\":\"bytes32\",\"name\":\"configDigest\",\"type\":\"bytes32\"},{\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestRound\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestRoundData\",\"outputs\":[{\"internalType\":\"uint80\",\"name\":\"roundId\",\"type\":\"uint80\"},{\"internalType\":\"int256\",\"name\":\"answer\",\"type\":\"int256\"},{\"internalType\":\"uint256\",\"name\":\"startedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"updatedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint80\",\"name\":\"answeredInRound\",\"type\":\"uint80\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestTimestamp\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestTransmissionDetails\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"configDigest\",\"type\":\"bytes32\"},{\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"},{\"internalType\":\"uint8\",\"name\":\"round\",\"type\":\"uint8\"},{\"internalType\":\"int192\",\"name\":\"latestAnswer_\",\"type\":\"int192\"},{\"internalType\":\"uint64\",\"name\":\"latestTimestamp_\",\"type\":\"uint64\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"linkAvailableForPayment\",\"outputs\":[{\"internalType\":\"int256\",\"name\":\"availableBalance\",\"type\":\"int256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"maxAnswer\",\"outputs\":[{\"internalType\":\"int192\",\"name\":\"\",\"type\":\"int192\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"minAnswer\",\"outputs\":[{\"internalType\":\"int192\",\"name\":\"\",\"type\":\"int192\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitterAddress\",\"type\":\"address\"}],\"name\":\"oracleObservationCount\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitterAddress\",\"type\":\"address\"}],\"name\":\"owedPayment\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"requestNewRound\",\"outputs\":[{\"internalType\":\"uint80\",\"name\":\"\",\"type\":\"uint80\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"maximumGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"reasonableGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"observationPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"transmissionPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint24\",\"name\":\"accountingGas\",\"type\":\"uint24\"}],\"name\":\"setBilling\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"_billingAccessController\",\"type\":\"address\"}],\"name\":\"setBillingAccessController\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"signers\",\"type\":\"address[]\"},{\"internalType\":\"address[]\",\"name\":\"transmitters\",\"type\":\"address[]\"},{\"internalType\":\"uint8\",\"name\":\"f\",\"type\":\"uint8\"},{\"internalType\":\"bytes\",\"name\":\"onchainConfig\",\"type\":\"bytes\"},{\"internalType\":\"uint64\",\"name\":\"offchainConfigVersion\",\"type\":\"uint64\"},{\"internalType\":\"bytes\",\"name\":\"offchainConfig\",\"type\":\"bytes\"}],\"name\":\"setConfig\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractLinkTokenInterface\",\"name\":\"linkToken\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"}],\"name\":\"setLinkToken\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"transmitters\",\"type\":\"address[]\"},{\"internalType\":\"address[]\",\"name\":\"payees\",\"type\":\"address[]\"}],\"name\":\"setPayees\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"requesterAccessController\",\"type\":\"address\"}],\"name\":\"setRequesterAccessController\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"newValidator\",\"type\":\"address\"},{\"internalType\":\"uint32\",\"name\":\"newGasLimit\",\"type\":\"uint32\"}],\"name\":\"setValidatorConfig\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"proposed\",\"type\":\"address\"}],\"name\":\"transferPayeeship\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32[3]\",\"name\":\"reportContext\",\"type\":\"bytes32[3]\"},{\"internalType\":\"bytes\",\"name\":\"report\",\"type\":\"bytes\"},{\"internalType\":\"bytes32[]\",\"name\":\"rs\",\"type\":\"bytes32[]\"},{\"internalType\":\"bytes32[]\",\"name\":\"ss\",\"type\":\"bytes32[]\"},{\"internalType\":\"bytes32\",\"name\":\"rawVs\",\"type\":\"bytes32\"}],\"name\":\"transmit\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"typeAndVersion\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"version\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"withdrawFunds\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"}],\"name\":\"withdrawPayment\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]","chainReaderDefinitions":{"LatestTransmissionDetails":{"chainSpecificName":"latestTransmissionDetails","readType":0, "output_modifications":[{"type":"rename","fields":{"LatestAnswer_":"LatestAnswer","LatestTimestamp_":"LatestTimestamp"}}]},"LatestRoundRequested":{"chainSpecificName":"RoundRequested","params":{"requester":""},"readType":1}}}}}'
+codec = '{"chainCodecConfig" :{"MedianReport":{"TypeAbi": "[{\"Name\": \"Timestamp\",\"Type\": \"uint32\"},{\"Name\": \"Observers\",\"Type\": \"bytes32\"},{\"Name\": \"Observations\",\"Type\": \"int192[]\"},{\"Name\": \"JuelsPerFeeCoin\",\"Type\": \"int192\"}]"}}}'`
+				}
+				ocrJob, err := validate.ValidatedOracleSpecToml(apps[i].Config.OCR2(), apps[i].Config.Insecure(), fmt.Sprintf(`
 type               = "offchainreporting2"
 relay              = "evm"
 schemaVersion      = 1
@@ -316,7 +345,7 @@ observationSource  = """
 """
 [relayConfig]
 chainID = 1337
-fromBlock = %d
+fromBlock = %d%s
 [pluginConfig]
 juelsPerFeeCoinSource = """
 		// data source 1
@@ -334,72 +363,131 @@ juelsPerFeeCoinSource = """
 
 	answer1 [type=median index=0];
 """
-`, ocrContractAddress, kbs[i].ID(), transmitters[i], fmt.Sprintf("bridge%d", i), i, slowServers[i].URL, i, blockBeforeConfig.Number().Int64(), fmt.Sprintf("bridge%d", i), i, slowServers[i].URL, i))
-		require.NoError(t, err)
-		err = apps[i].AddJobV2(testutils.Context(t), &ocrJob)
-		require.NoError(t, err)
-		jids = append(jids, ocrJob.ID)
-	}
+`, ocrContractAddress, kbs[i].ID(), transmitters[i], fmt.Sprintf("bridge%d", i), i, slowServers[i].URL, i, blockBeforeConfig.Number().Int64(), chainReaderSpec, fmt.Sprintf("bridge%d", i), i, slowServers[i].URL, i))
+				require.NoError(t, err)
+				err = apps[i].AddJobV2(testutils.Context(t), &ocrJob)
+				require.NoError(t, err)
+				jids = append(jids, ocrJob.ID)
+			}
 
-	// Assert that all the OCR jobs get a run with valid values eventually.
-	var wg sync.WaitGroup
-	for i := 0; i < 4; i++ {
-		ic := i
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			// Want at least 2 runs so we see all the metadata.
-			pr := cltest.WaitForPipelineComplete(t, ic, jids[ic], 2, 7, apps[ic].JobORM(), 2*time.Minute, 5*time.Second)
-			jb, err := pr[0].Outputs.MarshalJSON()
+			// Watch for OCR2AggregatorTransmitted events
+			start := uint64(0)
+			txEvents := make(chan *ocr2aggregator.OCR2AggregatorTransmitted)
+			_, err := ocrContract.WatchTransmitted(&bind.WatchOpts{Start: &start, Context: testutils.Context(t)}, txEvents)
 			require.NoError(t, err)
-			assert.Equal(t, []byte(fmt.Sprintf("[\"%d\"]", 10*ic)), jb, "pr[0] %+v pr[1] %+v", pr[0], pr[1])
+			newTxEvents := make(chan *ocr2aggregator.OCR2AggregatorNewTransmission)
+			_, err = ocrContract.WatchNewTransmission(&bind.WatchOpts{Start: &start, Context: testutils.Context(t)}, newTxEvents, []uint32{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
 			require.NoError(t, err)
-		}()
-	}
-	wg.Wait()
 
-	// 4 oracles reporting 0, 10, 20, 30. Answer should be 20 (results[4/2]).
-	gomega.NewGomegaWithT(t).Eventually(func() string {
-		answer, err := ocrContract.LatestAnswer(nil)
-		require.NoError(t, err)
-		return answer.String()
-	}, 1*time.Minute, 200*time.Millisecond).Should(gomega.Equal("20"))
+			go func() {
+				var newTxEvent *ocr2aggregator.OCR2AggregatorNewTransmission
+				select {
+				case txEvent := <-txEvents:
+					t.Logf("txEvent: %v", txEvent)
+					if newTxEvent != nil {
+						assert.Equal(t, txEvent.Epoch, uint32(newTxEvent.EpochAndRound.Uint64()))
+					}
+				case newTxEvent = <-newTxEvents:
+					t.Logf("newTxEvent: %v", newTxEvent)
+				}
+			}()
 
-	for _, app := range apps {
-		jobs, _, err := app.JobORM().FindJobs(0, 1000)
-		require.NoError(t, err)
-		// No spec errors
-		for _, j := range jobs {
-			ignore := 0
-			for i := range j.JobSpecErrors {
-				// Non-fatal timing related error, ignore for testing.
-				if strings.Contains(j.JobSpecErrors[i].Description, "leader's phase conflicts tGrace timeout") {
-					ignore++
+			for trial := 0; trial < 2; trial++ {
+				var retVal int
+
+				metaLock.Lock()
+				returnData = 10 * (trial + 1)
+				retVal = returnData
+				for i := 0; i < 4; i++ {
+					expectedMeta[fmt.Sprintf("%d", returnData*i)] = struct{}{}
+				}
+				metaLock.Unlock()
+
+				// Assert that all the OCR jobs get a run with valid values eventually.
+				var wg sync.WaitGroup
+				for i := 0; i < 4; i++ {
+					ic := i
+					wg.Add(1)
+					go func() {
+						defer wg.Done()
+						completedRuns, err2 := apps[ic].JobORM().FindPipelineRunIDsByJobID(jids[ic], 0, 1000)
+						require.NoError(t, err2)
+						// Want at least 2 runs so we see all the metadata.
+						pr := cltest.WaitForPipelineComplete(t, ic, jids[ic], len(completedRuns)+2, 7, apps[ic].JobORM(), 2*time.Minute, 5*time.Second)
+						jb, err2 := pr[0].Outputs.MarshalJSON()
+						require.NoError(t, err2)
+						assert.Equal(t, []byte(fmt.Sprintf("[\"%d\"]", retVal*ic)), jb, "pr[0] %+v pr[1] %+v", pr[0], pr[1])
+						require.NoError(t, err2)
+					}()
+				}
+				wg.Wait()
+
+				// Trail #1: 4 oracles reporting 0, 10, 20, 30. Answer should be 20 (results[4/2]).
+				// Trial #2: 4 oracles reporting 0, 20, 40, 60. Answer should be 40 (results[4/2]).
+				gomega.NewGomegaWithT(t).Eventually(func() string {
+					answer, err2 := ocrContract.LatestAnswer(nil)
+					require.NoError(t, err2)
+					return answer.String()
+				}, 1*time.Minute, 200*time.Millisecond).Should(gomega.Equal(fmt.Sprintf("%d", 2*retVal)))
+
+				for _, app := range apps {
+					jobs, _, err2 := app.JobORM().FindJobs(0, 1000)
+					require.NoError(t, err2)
+					// No spec errors
+					for _, j := range jobs {
+						ignore := 0
+						for i := range j.JobSpecErrors {
+							// Non-fatal timing related error, ignore for testing.
+							if strings.Contains(j.JobSpecErrors[i].Description, "leader's phase conflicts tGrace timeout") {
+								ignore++
+							}
+						}
+						require.Len(t, j.JobSpecErrors, ignore)
+					}
+				}
+				em := map[string]struct{}{}
+				metaLock.Lock()
+				maps.Copy(em, expectedMeta)
+				metaLock.Unlock()
+				assert.Len(t, em, 0, "expected metadata %v", em)
+
+				t.Logf("======= Summary =======")
+				roundId, err2 := ocrContract.LatestRound(nil)
+				require.NoError(t, err2)
+				for i := 0; i <= int(roundId.Int64()); i++ {
+					roundData, err3 := ocrContract.GetRoundData(nil, big.NewInt(int64(i)))
+					require.NoError(t, err3)
+					t.Logf("RoundId: %d, AnsweredInRound: %d, Answer: %d, StartedAt: %v, UpdatedAt: %v", roundData.RoundId, roundData.AnsweredInRound, roundData.Answer, roundData.StartedAt, roundData.UpdatedAt)
+				}
+
+				expectedAnswer := big.NewInt(2 * int64(retVal))
+
+				// Assert we can read the latest config digest and epoch after a report has been submitted.
+				contractABI, err2 := abi.JSON(strings.NewReader(ocr2aggregator.OCR2AggregatorABI))
+				require.NoError(t, err2)
+				apps[0].GetRelayers().LegacyEVMChains().Slice()
+				ct, err2 := evm.NewOCRContractTransmitter(ocrContractAddress, apps[0].GetRelayers().LegacyEVMChains().Slice()[0].Client(), contractABI, nil, apps[0].GetRelayers().LegacyEVMChains().Slice()[0].LogPoller(), lggr, nil)
+				require.NoError(t, err2)
+				configDigest, epoch, err2 := ct.LatestConfigDigestAndEpoch(testutils.Context(t))
+				require.NoError(t, err2)
+				details, err2 := ocrContract.LatestConfigDetails(nil)
+				require.NoError(t, err2)
+				assert.True(t, bytes.Equal(configDigest[:], details.ConfigDigest[:]))
+				digestAndEpoch, err2 := ocrContract.LatestConfigDigestAndEpoch(nil)
+				require.NoError(t, err2)
+				assert.Equal(t, digestAndEpoch.Epoch, epoch)
+				latestTransmissionDetails, err2 := ocrContract.LatestTransmissionDetails(nil)
+				require.NoError(t, err2)
+				assert.Equal(t, expectedAnswer, latestTransmissionDetails.LatestAnswer)
+				require.NoError(t, err2)
+				newTransmissionEvents, err2 := ocrContract.FilterTransmitted(&bind.FilterOpts{Start: 0, End: nil})
+				require.NoError(t, err2)
+				for newTransmissionEvents.Next() {
+					assert.Equal(t, 3, newTransmissionEvents.Event.Epoch)
 				}
 			}
-			require.Len(t, j.JobSpecErrors, ignore)
-		}
+		})
 	}
-	em := map[string]struct{}{}
-	metaLock.Lock()
-	maps.Copy(em, expectedMeta)
-	metaLock.Unlock()
-	assert.Len(t, em, 0, "expected metadata %v", em)
-
-	// Assert we can read the latest config digest and epoch after a report has been submitted.
-	contractABI, err := abi.JSON(strings.NewReader(ocr2aggregator.OCR2AggregatorABI))
-	require.NoError(t, err)
-	apps[0].GetRelayers().LegacyEVMChains().Slice()
-	ct, err := evm.NewOCRContractTransmitter(ocrContractAddress, apps[0].GetRelayers().LegacyEVMChains().Slice()[0].Client(), contractABI, nil, apps[0].GetRelayers().LegacyEVMChains().Slice()[0].LogPoller(), lggr, nil)
-	require.NoError(t, err)
-	configDigest, epoch, err := ct.LatestConfigDigestAndEpoch(testutils.Context(t))
-	require.NoError(t, err)
-	details, err := ocrContract.LatestConfigDetails(nil)
-	require.NoError(t, err)
-	assert.True(t, bytes.Equal(configDigest[:], details.ConfigDigest[:]))
-	digestAndEpoch, err := ocrContract.LatestConfigDigestAndEpoch(nil)
-	require.NoError(t, err)
-	assert.Equal(t, digestAndEpoch.Epoch, epoch)
 }
 
 func initOCR2(t *testing.T, lggr logger.Logger, b *backends.SimulatedBackend,
diff --git a/core/scripts/go.mod b/core/scripts/go.mod
index c2f57f9446f..dfd66d05f5c 100644
--- a/core/scripts/go.mod
+++ b/core/scripts/go.mod
@@ -60,7 +60,6 @@ require (
 	github.com/blendle/zapdriver v1.3.1 // indirect
 	github.com/btcsuite/btcd/btcec/v2 v2.3.2 // indirect
 	github.com/btcsuite/btcd/btcutil v1.1.3 // indirect
-	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 // indirect
 	github.com/bytedance/sonic v1.10.1 // indirect
 	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
 	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
@@ -237,11 +236,11 @@ require (
 	github.com/shirou/gopsutil/v3 v3.23.11 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/smartcontractkit/caigo v0.0.0-20230621050857-b29a4ca8c704 // indirect
-	github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231128204301-ee4297eff679 // indirect
+	github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231222201016-da3f0a763f71 // indirect
 	github.com/smartcontractkit/chainlink-data-streams v0.0.0-20231204152908-a6e3fe8ff2a1 // indirect
-	github.com/smartcontractkit/chainlink-feeds v0.0.0-20231213175155-181d4a261f5d // indirect
-	github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231130211003-6d1bb2f0b68a // indirect
-	github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231128204445-3d61b12a0006 // indirect
+	github.com/smartcontractkit/chainlink-feeds v0.0.0-20231222013040-c93f24a1b105 // indirect
+	github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231222220348-c7d81beaf8fd // indirect
+	github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231221191127-1f32389044ea // indirect
 	github.com/smartcontractkit/tdh2/go/ocr2/decryptionplugin v0.0.0-20230906073235-9e478e5e19f1 // indirect
 	github.com/smartcontractkit/tdh2/go/tdh2 v0.0.0-20230906073235-9e478e5e19f1 // indirect
 	github.com/smartcontractkit/wsrpc v0.7.2 // indirect
diff --git a/core/scripts/go.sum b/core/scripts/go.sum
index 852567d01b8..d950fe52368 100644
--- a/core/scripts/go.sum
+++ b/core/scripts/go.sum
@@ -169,6 +169,7 @@ github.com/blendle/zapdriver v1.3.1 h1:C3dydBOWYRiOk+B8X9IVZ5IOe+7cl+tGOexN4QqHf
 github.com/blendle/zapdriver v1.3.1/go.mod h1:mdXfREi6u5MArG4j9fewC+FGnXaBR+T4Ox4J2u4eHCc=
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btcd v0.22.0-beta.0.20220111032746-97732e52810c/go.mod h1:tjmYdS6MLJ5/s0Fj4DbLgSbDHbEqLJrtnHecBFkdz5M=
+github.com/btcsuite/btcd v0.23.0 h1:V2/ZgjfDFIygAX3ZapeigkVBoVUtOJKSwrhZdlpSvaA=
 github.com/btcsuite/btcd v0.23.0/go.mod h1:0QJIIN1wwIXF/3G/m87gIwGniDMDQqjVn4SZgnFpsYY=
 github.com/btcsuite/btcd/btcec/v2 v2.1.0/go.mod h1:2VzYrv4Gm4apmbVVsSq5bqf1Ec8v56E48Vt0Y/umPgA=
 github.com/btcsuite/btcd/btcec/v2 v2.1.3/go.mod h1:ctjw4H1kknNJmRN4iP1R7bTQ+v3GJkZBd6mui8ZsAZE=
@@ -179,8 +180,9 @@ github.com/btcsuite/btcd/btcutil v1.1.0/go.mod h1:5OapHB7A2hBBWLm48mmw4MOHNJCcUB
 github.com/btcsuite/btcd/btcutil v1.1.3 h1:xfbtw8lwpp0G6NwSHb+UE67ryTFHJAiNuipusjXSohQ=
 github.com/btcsuite/btcd/btcutil v1.1.3/go.mod h1:UR7dsSJzJUfMmFiiLlIrMq1lS9jh9EdCV7FStZSnpi0=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.0/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.3 h1:SDlJ7bAm4ewvrmZtR0DaiYbQGdKPeaaIm7bM+qRhFeU=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.3/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
 github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
 github.com/btcsuite/go-socks v0.0.0-20170105172521-4720035b7bfd/go.mod h1:HHNXQzUsZCxOoE+CPiyCTO6x34Zs86zZUiwtpXoGdtg=
@@ -1148,16 +1150,16 @@ github.com/smartcontractkit/chainlink-automation v1.0.1 h1:vVjBFq2Zsz21kPy1Pb0wp
 github.com/smartcontractkit/chainlink-automation v1.0.1/go.mod h1:INSchkV3ntyDdlZKGWA030MPDpp6pbeuiRkRKYFCm2k=
 github.com/smartcontractkit/chainlink-common v0.1.7-0.20231222013743-f67285bba7bd h1:DsExL564kL/YwKWvUIMUKgdcpUE4Ryfi0aYIS/uXxmY=
 github.com/smartcontractkit/chainlink-common v0.1.7-0.20231222013743-f67285bba7bd/go.mod h1:f+0ei9N4PlTJHu7pbGzEjTnBUr45syPdGFu5+31lS5Q=
-github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231128204301-ee4297eff679 h1:iu1pNbUoSDTrp+7BUtfTygZ2C0f5C2ZOBQhIoJjp+S0=
-github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231128204301-ee4297eff679/go.mod h1:2Jx7bTEk4ujFQdsZpZq3A0BydvaVPs6mX8clUfxHOEM=
+github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231222201016-da3f0a763f71 h1:Ju0cxdrzGFwHGDPp16IzkOyX87LZ/kKDFG1A+VSEJHY=
+github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231222201016-da3f0a763f71/go.mod h1:Ppv5X8MTUkkpKdb270dLefjio724vMkCWmSSaWo7CzI=
 github.com/smartcontractkit/chainlink-data-streams v0.0.0-20231204152908-a6e3fe8ff2a1 h1:xYqRgZO0nMSO8CBCMR0r3WA+LZ4kNL8a6bnbyk/oBtQ=
 github.com/smartcontractkit/chainlink-data-streams v0.0.0-20231204152908-a6e3fe8ff2a1/go.mod h1:GuPvyXryvbiUZIHmPeLBz4L+yJKeyGUjrDfd1KNne+o=
-github.com/smartcontractkit/chainlink-feeds v0.0.0-20231213175155-181d4a261f5d h1:MicPzjBP6vbcSLNDoCD6Y16/l/8O+e2jlmn7t6gQbhU=
-github.com/smartcontractkit/chainlink-feeds v0.0.0-20231213175155-181d4a261f5d/go.mod h1:/gErwx/BBGs7gKXy3a3mfnNtL0TrmcODzVQkUvPTXtY=
-github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231130211003-6d1bb2f0b68a h1:JoyTazNcqXvZoMQjNfB0eapnlaoMS6pI0NeRvouRvog=
-github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231130211003-6d1bb2f0b68a/go.mod h1:rioELYwPY2xBtzPRN/D08Y7iTPbIQEjPknYdJK51CzQ=
-github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231128204445-3d61b12a0006 h1:1GzOKT53e8N7ZPwsyf1hSbKsynZmXmLOIL3DMvGq9sc=
-github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231128204445-3d61b12a0006/go.mod h1:tJLhL7gJ+V3+4N/yLxXIvJ0DAiuyqZCa31+2BSbw7zo=
+github.com/smartcontractkit/chainlink-feeds v0.0.0-20231222013040-c93f24a1b105 h1:UUHT19viW3IIxsELz3jsvlk5MnID7cMFZlmor4seTKE=
+github.com/smartcontractkit/chainlink-feeds v0.0.0-20231222013040-c93f24a1b105/go.mod h1:vQIT9tsN85b4DNgdweUilSUPX7R6gosvCmK5fvFgJAs=
+github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231222220348-c7d81beaf8fd h1:9xSwDgRJDIfDw6171PQEyn5IQ1JKpaJnG5NX6KfCaHQ=
+github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231222220348-c7d81beaf8fd/go.mod h1:kY435jBtHbyzhe+ImAxZ6G229uHbB0ablA+A0tJkDn8=
+github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231221191127-1f32389044ea h1:WzMa0O6DEauMYMIjzS/T1JF8zvFDt4aG6EUTDlStaZo=
+github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231221191127-1f32389044ea/go.mod h1:J4A5pQh3CiVs5S2eQMHezToXHoC+Wj0UHBtMXCiTIJA=
 github.com/smartcontractkit/chainlink-vrf v0.0.0-20231120191722-fef03814f868 h1:FFdvEzlYwcuVHkdZ8YnZR/XomeMGbz5E2F2HZI3I3w8=
 github.com/smartcontractkit/chainlink-vrf v0.0.0-20231120191722-fef03814f868/go.mod h1:Kn1Hape05UzFZ7bOUnm3GVsHzP0TNrVmpfXYNHdqGGs=
 github.com/smartcontractkit/go-plugin v0.0.0-20231003134350-e49dad63b306 h1:ko88+ZznniNJZbZPWAvHQU8SwKAdHngdDZ+pvVgB5ss=
diff --git a/core/services/job/models.go b/core/services/job/models.go
index 50e986d8db1..0911657abdc 100644
--- a/core/services/job/models.go
+++ b/core/services/job/models.go
@@ -278,7 +278,21 @@ type JSONConfig map[string]interface{}
 
 // Bytes returns the raw bytes
 func (r JSONConfig) Bytes() []byte {
-	b, _ := json.Marshal(r)
+	var retCopy = make(JSONConfig, len(r))
+	for key, value := range r {
+		copiedVal := value
+		// If the value is a json structure string, unmarshal it to preserve JSON structure
+		// e.g. instead of this {"key":"{\"nestedKey\":{\"nestedValue\":123}}"}
+		//      we want this    {"key":{"nestedKey":{"nestedValue":123}}},
+		if strValue, ok := copiedVal.(string); ok {
+			if object, ok := asObject(strValue); ok {
+				copiedVal = object
+			}
+		}
+		retCopy[key] = copiedVal
+	}
+
+	b, _ := json.Marshal(retCopy)
 	return b
 }
 
@@ -308,6 +322,11 @@ func (r JSONConfig) MercuryCredentialName() (string, error) {
 	return name, nil
 }
 
+func asObject(s string) (any, bool) {
+	var js map[string]interface{}
+	return js, json.Unmarshal([]byte(s), &js) == nil
+}
+
 var ForwardersSupportedPlugins = []types.OCR2PluginType{types.Median, types.DKG, types.OCR2VRF, types.OCR2Keeper, types.Functions}
 
 // OCR2OracleSpec defines the job spec for OCR2 jobs.
diff --git a/core/services/ocr2/plugins/median/plugin.go b/core/services/ocr2/plugins/median/plugin.go
deleted file mode 100644
index cad2099832d..00000000000
--- a/core/services/ocr2/plugins/median/plugin.go
+++ /dev/null
@@ -1,68 +0,0 @@
-package median
-
-import (
-	"context"
-
-	"github.com/smartcontractkit/libocr/offchainreporting2/reportingplugin/median"
-	ocrtypes "github.com/smartcontractkit/libocr/offchainreporting2plus/types"
-
-	"github.com/smartcontractkit/chainlink-common/pkg/logger"
-	"github.com/smartcontractkit/chainlink-common/pkg/loop"
-	"github.com/smartcontractkit/chainlink-common/pkg/services"
-	"github.com/smartcontractkit/chainlink-common/pkg/types"
-)
-
-type Plugin struct {
-	loop.Plugin
-	stop services.StopChan
-}
-
-func NewPlugin(lggr logger.Logger) *Plugin {
-	return &Plugin{Plugin: loop.Plugin{Logger: lggr}, stop: make(services.StopChan)}
-}
-
-func (p *Plugin) NewMedianFactory(ctx context.Context, provider types.MedianProvider, dataSource, juelsPerFeeCoin median.DataSource, errorLog loop.ErrorLog) (loop.ReportingPluginFactory, error) {
-	var ctxVals loop.ContextValues
-	ctxVals.SetValues(ctx)
-	lggr := logger.With(p.Logger, ctxVals.Args()...)
-
-	factory := median.NumericalMedianFactory{
-		ContractTransmitter:       provider.MedianContract(),
-		DataSource:                dataSource,
-		JuelsPerFeeCoinDataSource: juelsPerFeeCoin,
-		Logger: logger.NewOCRWrapper(lggr, true, func(msg string) {
-			ctx, cancelFn := p.stop.NewCtx()
-			defer cancelFn()
-			if err := errorLog.SaveError(ctx, msg); err != nil {
-				lggr.Errorw("Unable to save error", "err", msg)
-			}
-		}),
-		OnchainConfigCodec: provider.OnchainConfigCodec(),
-		ReportCodec:        provider.ReportCodec(),
-	}
-	s := &reportingPluginFactoryService{lggr: logger.Named(lggr, "ReportingPluginFactory"), ReportingPluginFactory: factory}
-
-	p.SubService(s)
-
-	return s, nil
-}
-
-type reportingPluginFactoryService struct {
-	services.StateMachine
-	lggr logger.Logger
-	ocrtypes.ReportingPluginFactory
-}
-
-func (r *reportingPluginFactoryService) Name() string { return r.lggr.Name() }
-
-func (r *reportingPluginFactoryService) Start(ctx context.Context) error {
-	return r.StartOnce("ReportingPluginFactory", func() error { return nil })
-}
-
-func (r *reportingPluginFactoryService) Close() error {
-	return r.StopOnce("ReportingPluginFactory", func() error { return nil })
-}
-
-func (r *reportingPluginFactoryService) HealthReport() map[string]error {
-	return map[string]error{r.Name(): r.Healthy()}
-}
diff --git a/core/services/ocr2/plugins/median/services.go b/core/services/ocr2/plugins/median/services.go
index 79abbc96a4b..bdf6feaed47 100644
--- a/core/services/ocr2/plugins/median/services.go
+++ b/core/services/ocr2/plugins/median/services.go
@@ -5,14 +5,9 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"math/big"
 	"time"
 
-	"github.com/ethereum/go-ethereum/common"
 	libocr "github.com/smartcontractkit/libocr/offchainreporting2plus"
-	ocr2types "github.com/smartcontractkit/libocr/offchainreporting2plus/types"
-
-	mediantypes "github.com/smartcontractkit/libocr/offchainreporting2/reportingplugin/median"
 
 	"github.com/smartcontractkit/chainlink-common/pkg/loop"
 	"github.com/smartcontractkit/chainlink-common/pkg/types"
@@ -57,21 +52,6 @@ func (m *medianConfig) JobPipelineResultWriteQueueDepth() uint64 {
 	return m.jobPipelineResultWriteQueueDepth
 }
 
-// This wrapper avoids the need to modify the signature of NewMedianFactory in all of the non-evm
-// relay repos as well as its primary definition in chainlink-common. Once ChainReader is implemented
-// and working on all 4 blockchain families, we can remove the original MedianContract() method from
-// MedianProvider and pass medianContract as a separate param to NewMedianFactory
-type medianProviderWrapper struct {
-	types.MedianProvider
-	contract mediantypes.MedianContract
-}
-
-// Override relay's implementation of MedianContract with product plugin's implementation of
-// MedianContract, making use of product-agnostic ChainReader to read the contract instead of relay MedianContract
-func (m medianProviderWrapper) MedianContract() mediantypes.MedianContract {
-	return m.contract
-}
-
 func NewMedianServices(ctx context.Context,
 	jb job.Job,
 	isNewlyCreatedJob bool,
@@ -145,24 +125,10 @@ func NewMedianServices(ctx context.Context,
 		CreatedAt:    time.Now(),
 	}, lggr)
 
-	medianPluginCmd := env.MedianPluginCmd.Get()
-	medianLoopEnabled := medianPluginCmd != ""
-
-	// TODO BCF-2821 handle this properly as this blocks Solana chain reader dev
-	if !medianLoopEnabled && medianProvider.ChainReader() != nil {
-		lggr.Info("Chain Reader enabled")
-		medianProvider = medianProviderWrapper{
-			medianProvider, // attach newer MedianContract which uses ChainReader
-			newMedianContract(provider.ChainReader(), common.HexToAddress(spec.ContractID)),
-		}
-	} else {
-		lggr.Info("Chain Reader disabled")
-	}
-
-	if medianLoopEnabled {
+	if cmdName := env.MedianPluginCmd.Get(); cmdName != "" {
 		// use unique logger names so we can use it to register a loop
 		medianLggr := lggr.Named("Median").Named(spec.ContractID).Named(spec.GetID())
-		cmdFn, telem, err2 := cfg.RegisterLOOP(medianLggr.Name(), medianPluginCmd)
+		cmdFn, telem, err2 := cfg.RegisterLOOP(medianLggr.Name(), cmdName)
 		if err2 != nil {
 			err = fmt.Errorf("failed to register loop: %w", err2)
 			abort()
@@ -192,49 +158,3 @@ func NewMedianServices(ctx context.Context,
 	}
 	return
 }
-
-type medianContract struct {
-	chainReader types.ChainReader
-	contract    types.BoundContract
-}
-
-type latestTransmissionDetailsResponse struct {
-	configDigest    ocr2types.ConfigDigest
-	epoch           uint32
-	round           uint8
-	latestAnswer    *big.Int
-	latestTimestamp time.Time
-}
-
-type latestRoundRequested struct {
-	configDigest ocr2types.ConfigDigest
-	epoch        uint32
-	round        uint8
-}
-
-func (m *medianContract) LatestTransmissionDetails(ctx context.Context) (configDigest ocr2types.ConfigDigest, epoch uint32, round uint8, latestAnswer *big.Int, latestTimestamp time.Time, err error) {
-	var resp latestTransmissionDetailsResponse
-
-	err = m.chainReader.GetLatestValue(ctx, m.contract.Name, "LatestTransmissionDetails", nil, &resp)
-	if err != nil {
-		return
-	}
-
-	return resp.configDigest, resp.epoch, resp.round, resp.latestAnswer, resp.latestTimestamp, err
-}
-
-func (m *medianContract) LatestRoundRequested(ctx context.Context, lookback time.Duration) (configDigest ocr2types.ConfigDigest, epoch uint32, round uint8, err error) {
-	var resp latestRoundRequested
-
-	err = m.chainReader.GetLatestValue(ctx, m.contract.Name, "LatestRoundRequested", map[string]string{}, &resp)
-	if err != nil {
-		return
-	}
-
-	return resp.configDigest, resp.epoch, resp.round, err
-}
-
-func newMedianContract(chainReader types.ChainReader, address common.Address) *medianContract {
-	contract := types.BoundContract{Address: address.String(), Name: "median", Pending: true}
-	return &medianContract{chainReader, contract}
-}
diff --git a/core/services/relay/evm/binding.go b/core/services/relay/evm/binding.go
index 465a10b368d..32699516e18 100644
--- a/core/services/relay/evm/binding.go
+++ b/core/services/relay/evm/binding.go
@@ -130,7 +130,7 @@ func (e *eventBinding) GetLatestValue(_ context.Context, _ any) ([]byte, error)
 	if err != nil {
 		errStr := err.Error()
 		if strings.Contains(errStr, "not found") || strings.Contains(errStr, "no rows") {
-			return nil, nil
+			return nil, fmt.Errorf("%w: %w", commontypes.ErrNotFound, err)
 		}
 		return nil, err
 	}
diff --git a/core/services/relay/evm/codec.go b/core/services/relay/evm/codec.go
index b953d382d83..19b9c6e4f40 100644
--- a/core/services/relay/evm/codec.go
+++ b/core/services/relay/evm/codec.go
@@ -73,7 +73,7 @@ func (c *evmCodec) CreateType(itemType string, forEncoding bool) (any, error) {
 
 	def, ok := itemTypes[itemType]
 	if !ok {
-		return nil, commontypes.ErrInvalidType
+		return nil, fmt.Errorf("%w: cannot find type name %s", commontypes.ErrInvalidType, itemType)
 	}
 
 	return reflect.New(def.checkedType).Interface(), nil
diff --git a/core/services/relay/evm/codec_entry.go b/core/services/relay/evm/codec_entry.go
index 1ef5d4f0591..17289844b4b 100644
--- a/core/services/relay/evm/codec_entry.go
+++ b/core/services/relay/evm/codec_entry.go
@@ -61,7 +61,7 @@ func (entry *codecEntry) Init() error {
 
 func (entry *codecEntry) GetMaxSize(n int) (int, error) {
 	if entry == nil {
-		return 0, commontypes.ErrInvalidType
+		return 0, fmt.Errorf("%w: nil entry", commontypes.ErrInvalidType)
 	}
 	return GetMaxSize(n, entry.Args)
 }
@@ -104,7 +104,8 @@ func getNativeAndCheckedTypes(curType *abi.Type) (reflect.Type, reflect.Type, er
 			}
 			curType = curType.Elem
 		default:
-			return nil, nil, commontypes.ErrInvalidType
+			return nil, nil, fmt.Errorf(
+				"%w: cannot create type for kind %v", commontypes.ErrInvalidType, curType.GetType().Kind())
 		}
 	}
 	base, ok := types.GetType(curType.String())
diff --git a/core/services/relay/evm/decoder.go b/core/services/relay/evm/decoder.go
index 96f560ae9a8..6c7c1ca8949 100644
--- a/core/services/relay/evm/decoder.go
+++ b/core/services/relay/evm/decoder.go
@@ -2,6 +2,7 @@ package evm
 
 import (
 	"context"
+	"fmt"
 	"reflect"
 
 	"github.com/mitchellh/mapstructure"
@@ -18,7 +19,7 @@ var _ commontypes.Decoder = &decoder{}
 func (m *decoder) Decode(ctx context.Context, raw []byte, into any, itemType string) error {
 	info, ok := m.Definitions[itemType]
 	if !ok {
-		return commontypes.ErrInvalidType
+		return fmt.Errorf("%w: cannot find definition for %s", commontypes.ErrInvalidType, itemType)
 	}
 
 	decode, err := extractDecoding(info, raw)
@@ -53,7 +54,7 @@ func (m *decoder) GetMaxDecodingSize(ctx context.Context, n int, itemType string
 func extractDecoding(info *codecEntry, raw []byte) (any, error) {
 	unpacked := map[string]any{}
 	if err := info.Args.UnpackIntoMap(unpacked, raw); err != nil {
-		return nil, commontypes.ErrInvalidEncoding
+		return nil, fmt.Errorf("%w: %w: for args %#v", commontypes.ErrInvalidEncoding, err, info.Args)
 	}
 	var decode any = unpacked
 
@@ -79,8 +80,13 @@ func mapstructureDecode(src, dest any) error {
 		Result:     dest,
 		Squash:     true,
 	})
-	if err != nil || mDecoder.Decode(src) != nil {
-		return commontypes.ErrInvalidType
+	if err != nil {
+		return fmt.Errorf("%w: %w", commontypes.ErrInvalidType, err)
+	}
+
+	if err = mDecoder.Decode(src); err != nil {
+		return fmt.Errorf("%w: %w", commontypes.ErrInvalidType, err)
 	}
+
 	return nil
 }
diff --git a/core/services/relay/evm/encoder.go b/core/services/relay/evm/encoder.go
index b3ad6d70fe6..58b6160bb8a 100644
--- a/core/services/relay/evm/encoder.go
+++ b/core/services/relay/evm/encoder.go
@@ -2,6 +2,7 @@ package evm
 
 import (
 	"context"
+	"fmt"
 	"reflect"
 
 	commontypes "github.com/smartcontractkit/chainlink-common/pkg/types"
@@ -16,7 +17,7 @@ var _ commontypes.Encoder = &encoder{}
 func (e *encoder) Encode(ctx context.Context, item any, itemType string) ([]byte, error) {
 	info, ok := e.Definitions[itemType]
 	if !ok {
-		return nil, commontypes.ErrInvalidType
+		return nil, fmt.Errorf("%w: cannot find definition for %s", commontypes.ErrInvalidType, itemType)
 	}
 
 	if item == nil {
@@ -42,7 +43,7 @@ func encode(item reflect.Value, info *codecEntry) ([]byte, error) {
 	case reflect.Struct, reflect.Map:
 		return encodeItem(item, info)
 	default:
-		return nil, commontypes.ErrInvalidEncoding
+		return nil, fmt.Errorf("%w: cannot encode kind %v", commontypes.ErrInvalidType, item.Kind())
 	}
 }
 
@@ -58,7 +59,7 @@ func encodeArray(item reflect.Value, info *codecEntry) ([]byte, error) {
 	case reflect.Slice:
 		native = reflect.MakeSlice(info.nativeType, length, length)
 	default:
-		return nil, commontypes.ErrInvalidType
+		return nil, fmt.Errorf("%w: cannot encode %v as array", commontypes.ErrInvalidType, info.checkedType.Kind())
 	}
 
 	checkedElm := info.checkedType.Elem()
@@ -99,11 +100,12 @@ func encodeItem(item reflect.Value, info *codecEntry) ([]byte, error) {
 }
 
 func pack(info *codecEntry, values ...any) ([]byte, error) {
-	if bytes, err := info.Args.Pack(values...); err == nil {
-		withPrefix := make([]byte, 0, len(info.encodingPrefix)+len(bytes))
-		withPrefix = append(withPrefix, info.encodingPrefix...)
-		return append(withPrefix, bytes...), nil
+	bytes, err := info.Args.Pack(values...)
+	if err != nil {
+		return nil, fmt.Errorf("%w: %w", commontypes.ErrInvalidType, err)
 	}
 
-	return nil, commontypes.ErrInvalidType
+	withPrefix := make([]byte, 0, len(info.encodingPrefix)+len(bytes))
+	withPrefix = append(withPrefix, info.encodingPrefix...)
+	return append(withPrefix, bytes...), nil
 }
diff --git a/core/services/relay/evm/evm.go b/core/services/relay/evm/evm.go
index f58a54712fd..9e3c20553ab 100644
--- a/core/services/relay/evm/evm.go
+++ b/core/services/relay/evm/evm.go
@@ -541,12 +541,12 @@ type medianProvider struct {
 func (p *medianProvider) Name() string { return p.lggr.Name() }
 
 func (p *medianProvider) Start(ctx context.Context) error {
-	startCloses := []services.StartClose{p.configWatcher, p.contractTransmitter, p.medianContract}
+	srvcs := []services.StartClose{p.configWatcher, p.contractTransmitter, p.medianContract}
 	if p.chainReader != nil {
-		startCloses = append(startCloses, p.chainReader)
+		srvcs = append(srvcs, p.chainReader)
 	}
 
-	return p.ms.Start(ctx, startCloses...)
+	return p.ms.Start(ctx, srvcs...)
 }
 
 func (p *medianProvider) Close() error { return p.ms.Close() }
diff --git a/go.mod b/go.mod
index d9176753cc7..d79ee3dac17 100644
--- a/go.mod
+++ b/go.mod
@@ -66,11 +66,11 @@ require (
 	github.com/smartcontractkit/caigo v0.0.0-20230621050857-b29a4ca8c704
 	github.com/smartcontractkit/chainlink-automation v1.0.1
 	github.com/smartcontractkit/chainlink-common v0.1.7-0.20231222013743-f67285bba7bd
-	github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231128204301-ee4297eff679
+	github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231222201016-da3f0a763f71
 	github.com/smartcontractkit/chainlink-data-streams v0.0.0-20231204152908-a6e3fe8ff2a1
-	github.com/smartcontractkit/chainlink-feeds v0.0.0-20231213175155-181d4a261f5d
-	github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231130211003-6d1bb2f0b68a
-	github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231128204445-3d61b12a0006
+	github.com/smartcontractkit/chainlink-feeds v0.0.0-20231222013040-c93f24a1b105
+	github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231222220348-c7d81beaf8fd
+	github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231221191127-1f32389044ea
 	github.com/smartcontractkit/chainlink-vrf v0.0.0-20231120191722-fef03814f868
 	github.com/smartcontractkit/libocr v0.0.0-20231130143053-c5102a9c0fb7
 	github.com/smartcontractkit/tdh2/go/ocr2/decryptionplugin v0.0.0-20230906073235-9e478e5e19f1
@@ -129,7 +129,6 @@ require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bgentry/speakeasy v0.1.1-0.20220910012023-760eaf8b6816 // indirect
 	github.com/blendle/zapdriver v1.3.1 // indirect
-	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 // indirect
 	github.com/bytedance/sonic v1.10.1 // indirect
 	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
 	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
diff --git a/go.sum b/go.sum
index d5fb62247af..001a2444264 100644
--- a/go.sum
+++ b/go.sum
@@ -176,8 +176,8 @@ github.com/btcsuite/btcd/btcec/v2 v2.3.2 h1:5n0X6hX0Zk+6omWcihdYvdAlGf2DfasC0GMf
 github.com/btcsuite/btcd/btcec/v2 v2.3.2/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04=
 github.com/btcsuite/btcd/btcutil v1.1.2 h1:XLMbX8JQEiwMcYft2EGi8zPUkoa0abKIU6/BJSRsjzQ=
 github.com/btcsuite/btcd/btcutil v1.1.2/go.mod h1:UR7dsSJzJUfMmFiiLlIrMq1lS9jh9EdCV7FStZSnpi0=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.3 h1:SDlJ7bAm4ewvrmZtR0DaiYbQGdKPeaaIm7bM+qRhFeU=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.3/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/bufbuild/protocompile v0.4.0 h1:LbFKd2XowZvQ/kajzguUp2DC9UEIQhIq77fZZlaQsNA=
 github.com/bufbuild/protocompile v0.4.0/go.mod h1:3v93+mbWn/v3xzN+31nwkJfrEpAUwp+BagBSZWx+TP8=
 github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
@@ -1136,16 +1136,16 @@ github.com/smartcontractkit/chainlink-automation v1.0.1 h1:vVjBFq2Zsz21kPy1Pb0wp
 github.com/smartcontractkit/chainlink-automation v1.0.1/go.mod h1:INSchkV3ntyDdlZKGWA030MPDpp6pbeuiRkRKYFCm2k=
 github.com/smartcontractkit/chainlink-common v0.1.7-0.20231222013743-f67285bba7bd h1:DsExL564kL/YwKWvUIMUKgdcpUE4Ryfi0aYIS/uXxmY=
 github.com/smartcontractkit/chainlink-common v0.1.7-0.20231222013743-f67285bba7bd/go.mod h1:f+0ei9N4PlTJHu7pbGzEjTnBUr45syPdGFu5+31lS5Q=
-github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231128204301-ee4297eff679 h1:iu1pNbUoSDTrp+7BUtfTygZ2C0f5C2ZOBQhIoJjp+S0=
-github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231128204301-ee4297eff679/go.mod h1:2Jx7bTEk4ujFQdsZpZq3A0BydvaVPs6mX8clUfxHOEM=
+github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231222201016-da3f0a763f71 h1:Ju0cxdrzGFwHGDPp16IzkOyX87LZ/kKDFG1A+VSEJHY=
+github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231222201016-da3f0a763f71/go.mod h1:Ppv5X8MTUkkpKdb270dLefjio724vMkCWmSSaWo7CzI=
 github.com/smartcontractkit/chainlink-data-streams v0.0.0-20231204152908-a6e3fe8ff2a1 h1:xYqRgZO0nMSO8CBCMR0r3WA+LZ4kNL8a6bnbyk/oBtQ=
 github.com/smartcontractkit/chainlink-data-streams v0.0.0-20231204152908-a6e3fe8ff2a1/go.mod h1:GuPvyXryvbiUZIHmPeLBz4L+yJKeyGUjrDfd1KNne+o=
-github.com/smartcontractkit/chainlink-feeds v0.0.0-20231213175155-181d4a261f5d h1:MicPzjBP6vbcSLNDoCD6Y16/l/8O+e2jlmn7t6gQbhU=
-github.com/smartcontractkit/chainlink-feeds v0.0.0-20231213175155-181d4a261f5d/go.mod h1:/gErwx/BBGs7gKXy3a3mfnNtL0TrmcODzVQkUvPTXtY=
-github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231130211003-6d1bb2f0b68a h1:JoyTazNcqXvZoMQjNfB0eapnlaoMS6pI0NeRvouRvog=
-github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231130211003-6d1bb2f0b68a/go.mod h1:rioELYwPY2xBtzPRN/D08Y7iTPbIQEjPknYdJK51CzQ=
-github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231128204445-3d61b12a0006 h1:1GzOKT53e8N7ZPwsyf1hSbKsynZmXmLOIL3DMvGq9sc=
-github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231128204445-3d61b12a0006/go.mod h1:tJLhL7gJ+V3+4N/yLxXIvJ0DAiuyqZCa31+2BSbw7zo=
+github.com/smartcontractkit/chainlink-feeds v0.0.0-20231222013040-c93f24a1b105 h1:UUHT19viW3IIxsELz3jsvlk5MnID7cMFZlmor4seTKE=
+github.com/smartcontractkit/chainlink-feeds v0.0.0-20231222013040-c93f24a1b105/go.mod h1:vQIT9tsN85b4DNgdweUilSUPX7R6gosvCmK5fvFgJAs=
+github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231222220348-c7d81beaf8fd h1:9xSwDgRJDIfDw6171PQEyn5IQ1JKpaJnG5NX6KfCaHQ=
+github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231222220348-c7d81beaf8fd/go.mod h1:kY435jBtHbyzhe+ImAxZ6G229uHbB0ablA+A0tJkDn8=
+github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231221191127-1f32389044ea h1:WzMa0O6DEauMYMIjzS/T1JF8zvFDt4aG6EUTDlStaZo=
+github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231221191127-1f32389044ea/go.mod h1:J4A5pQh3CiVs5S2eQMHezToXHoC+Wj0UHBtMXCiTIJA=
 github.com/smartcontractkit/chainlink-vrf v0.0.0-20231120191722-fef03814f868 h1:FFdvEzlYwcuVHkdZ8YnZR/XomeMGbz5E2F2HZI3I3w8=
 github.com/smartcontractkit/chainlink-vrf v0.0.0-20231120191722-fef03814f868/go.mod h1:Kn1Hape05UzFZ7bOUnm3GVsHzP0TNrVmpfXYNHdqGGs=
 github.com/smartcontractkit/go-plugin v0.0.0-20231003134350-e49dad63b306 h1:ko88+ZznniNJZbZPWAvHQU8SwKAdHngdDZ+pvVgB5ss=
diff --git a/integration-tests/actions/ocr2_helpers.go b/integration-tests/actions/ocr2_helpers.go
index 37db348815b..829d85a8498 100644
--- a/integration-tests/actions/ocr2_helpers.go
+++ b/integration-tests/actions/ocr2_helpers.go
@@ -22,6 +22,7 @@ import (
 
 	"github.com/smartcontractkit/chainlink-testing-framework/blockchain"
 	ctfClient "github.com/smartcontractkit/chainlink-testing-framework/client"
+
 	"github.com/smartcontractkit/chainlink/v2/core/services/job"
 	"github.com/smartcontractkit/chainlink/v2/core/services/keystore/chaintype"
 	"github.com/smartcontractkit/chainlink/v2/core/services/ocr2/testhelpers"
@@ -376,6 +377,7 @@ func StartNewOCR2Round(
 	timeout time.Duration,
 	logger zerolog.Logger,
 ) error {
+	time.Sleep(5 * time.Second)
 	for i := 0; i < len(ocrInstances); i++ {
 		err := ocrInstances[i].RequestNewRound()
 		if err != nil {
@@ -383,9 +385,12 @@ func StartNewOCR2Round(
 		}
 		ocrRound := contracts.NewOffchainAggregatorV2RoundConfirmer(ocrInstances[i], big.NewInt(roundNumber), timeout, logger)
 		client.AddHeaderEventSubscription(ocrInstances[i].Address(), ocrRound)
-		err = client.WaitForEvents()
+		err = ocrRound.Wait() // wait for OCR Round to complete
 		if err != nil {
-			return fmt.Errorf("failed to wait for event subscriptions of OCR instance %d: %w", i+1, err)
+			return fmt.Errorf("failed to wait for OCR Round %d to complete instance %d", roundNumber, i)
+		}
+		if !ocrRound.Complete() {
+			return fmt.Errorf("failed to complete OCR Round %d for ocr instance %d", roundNumber, i)
 		}
 	}
 	return nil
diff --git a/integration-tests/actions/ocr2_helpers_local.go b/integration-tests/actions/ocr2_helpers_local.go
index 4a08921b8d1..ee1bef6fbdf 100644
--- a/integration-tests/actions/ocr2_helpers_local.go
+++ b/integration-tests/actions/ocr2_helpers_local.go
@@ -38,6 +38,7 @@ func CreateOCRv2JobsLocal(
 	mockAdapterValue int, // Value to get from the mock server when querying the path
 	chainId uint64, // EVM chain ID
 	forwardingAllowed bool,
+	enableChainReaderAndCodec bool,
 ) error {
 	// Collect P2P ID
 	bootstrapP2PIds, err := bootstrapNode.MustReadP2PKeys()
@@ -125,6 +126,11 @@ func CreateOCRv2JobsLocal(
 					P2PV2Bootstrappers:                pq.StringArray{p2pV2Bootstrapper},       // bootstrap node key and address <p2p-key>@bootstrap:6690
 				},
 			}
+			if enableChainReaderAndCodec {
+				ocrSpec.OCR2OracleSpec.RelayConfig["chainReader"] = `{"chainContractReaders":{"median":{"contractABI":"[{\"inputs\":[{\"internalType\":\"contractLinkTokenInterface\",\"name\":\"link\",\"type\":\"address\"},{\"internalType\":\"int192\",\"name\":\"minAnswer_\",\"type\":\"int192\"},{\"internalType\":\"int192\",\"name\":\"maxAnswer_\",\"type\":\"int192\"},{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"billingAccessController\",\"type\":\"address\"},{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"requesterAccessController\",\"type\":\"address\"},{\"internalType\":\"uint8\",\"name\":\"decimals_\",\"type\":\"uint8\"},{\"internalType\":\"string\",\"name\":\"description_\",\"type\":\"string\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"int256\",\"name\":\"current\",\"type\":\"int256\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"updatedAt\",\"type\":\"uint256\"}],\"name\":\"AnswerUpdated\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"old\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"current\",\"type\":\"address\"}],\"name\":\"BillingAccessControllerSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"maximumGasPriceGwei\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"reasonableGasPriceGwei\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"observationPaymentGjuels\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"transmissionPaymentGjuels\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint24\",\"name\":\"accountingGas\",\"type\":\"uint24\"}],\"name\":\"BillingSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"previousConfigBlockNumber\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"ConfigDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint64\",\"name\":\"configCount\",\"type\":\"uint64\"},{\"indexed\":false,\"internalType\":\"address[]\",\"name\":\"signers\",\"type\":\"address[]\"},{\"indexed\":false,\"internalType\":\"address[]\",\"name\":\"transmitters\",\"type\":\"address[]\"},{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"f\",\"type\":\"uint8\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"onchainConfig\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"uint64\",\"name\":\"offchainConfigVersion\",\"type\":\"uint64\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"offchainConfig\",\"type\":\"bytes\"}],\"name\":\"ConfigSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"contractLinkTokenInterface\",\"name\":\"oldLinkToken\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"contractLinkTokenInterface\",\"name\":\"newLinkToken\",\"type\":\"address\"}],\"name\":\"LinkTokenSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"startedBy\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"startedAt\",\"type\":\"uint256\"}],\"name\":\"NewRound\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint32\",\"name\":\"aggregatorRoundId\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"int192\",\"name\":\"answer\",\"type\":\"int192\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"observationsTimestamp\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"int192[]\",\"name\":\"observations\",\"type\":\"int192[]\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"observers\",\"type\":\"bytes\"},{\"indexed\":false,\"internalType\":\"int192\",\"name\":\"juelsPerFeeCoin\",\"type\":\"int192\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"ConfigDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint40\",\"name\":\"epochAndRound\",\"type\":\"uint40\"}],\"name\":\"NewTransmission\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"payee\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"contractLinkTokenInterface\",\"name\":\"linkToken\",\"type\":\"address\"}],\"name\":\"OraclePaid\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"OwnershipTransferRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"current\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"proposed\",\"type\":\"address\"}],\"name\":\"PayeeshipTransferRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previous\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"current\",\"type\":\"address\"}],\"name\":\"PayeeshipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"old\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"contractAccessControllerInterface\",\"name\":\"current\",\"type\":\"address\"}],\"name\":\"RequesterAccessControllerSet\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"requester\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"ConfigDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"},{\"indexed\":false,\"internalType\":\"uint8\",\"name\":\"round\",\"type\":\"uint8\"}],\"name\":\"RoundRequested\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"bytes32\",\"name\":\"ConfigDigest\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"}],\"name\":\"Transmitted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"previousValidator\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"previousGasLimit\",\"type\":\"uint32\"},{\"indexed\":true,\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"currentValidator\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint32\",\"name\":\"currentGasLimit\",\"type\":\"uint32\"}],\"name\":\"ValidatorConfigSet\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"acceptOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"}],\"name\":\"acceptPayeeship\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"description\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"}],\"name\":\"getAnswer\",\"outputs\":[{\"internalType\":\"int256\",\"name\":\"\",\"type\":\"int256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getBilling\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"maximumGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"reasonableGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"observationPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"transmissionPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint24\",\"name\":\"accountingGas\",\"type\":\"uint24\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getBillingAccessController\",\"outputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getLinkToken\",\"outputs\":[{\"internalType\":\"contractLinkTokenInterface\",\"name\":\"linkToken\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getRequesterAccessController\",\"outputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint80\",\"name\":\"roundId\",\"type\":\"uint80\"}],\"name\":\"getRoundData\",\"outputs\":[{\"internalType\":\"uint80\",\"name\":\"roundId_\",\"type\":\"uint80\"},{\"internalType\":\"int256\",\"name\":\"answer\",\"type\":\"int256\"},{\"internalType\":\"uint256\",\"name\":\"startedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"updatedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint80\",\"name\":\"answeredInRound\",\"type\":\"uint80\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"roundId\",\"type\":\"uint256\"}],\"name\":\"getTimestamp\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getTransmitters\",\"outputs\":[{\"internalType\":\"address[]\",\"name\":\"\",\"type\":\"address[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getValidatorConfig\",\"outputs\":[{\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"validator\",\"type\":\"address\"},{\"internalType\":\"uint32\",\"name\":\"gasLimit\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestAnswer\",\"outputs\":[{\"internalType\":\"int256\",\"name\":\"\",\"type\":\"int256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestConfigDetails\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"configCount\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"blockNumber\",\"type\":\"uint32\"},{\"internalType\":\"bytes32\",\"name\":\"ConfigDigest\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestConfigDigestAndEpoch\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"scanLogs\",\"type\":\"bool\"},{\"internalType\":\"bytes32\",\"name\":\"ConfigDigest\",\"type\":\"bytes32\"},{\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestRound\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestRoundData\",\"outputs\":[{\"internalType\":\"uint80\",\"name\":\"roundId\",\"type\":\"uint80\"},{\"internalType\":\"int256\",\"name\":\"answer\",\"type\":\"int256\"},{\"internalType\":\"uint256\",\"name\":\"startedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"updatedAt\",\"type\":\"uint256\"},{\"internalType\":\"uint80\",\"name\":\"answeredInRound\",\"type\":\"uint80\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestTimestamp\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"latestTransmissionDetails\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"ConfigDigest\",\"type\":\"bytes32\"},{\"internalType\":\"uint32\",\"name\":\"epoch\",\"type\":\"uint32\"},{\"internalType\":\"uint8\",\"name\":\"round\",\"type\":\"uint8\"},{\"internalType\":\"int192\",\"name\":\"latestAnswer_\",\"type\":\"int192\"},{\"internalType\":\"uint64\",\"name\":\"latestTimestamp_\",\"type\":\"uint64\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"linkAvailableForPayment\",\"outputs\":[{\"internalType\":\"int256\",\"name\":\"availableBalance\",\"type\":\"int256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"maxAnswer\",\"outputs\":[{\"internalType\":\"int192\",\"name\":\"\",\"type\":\"int192\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"minAnswer\",\"outputs\":[{\"internalType\":\"int192\",\"name\":\"\",\"type\":\"int192\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitterAddress\",\"type\":\"address\"}],\"name\":\"oracleObservationCount\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitterAddress\",\"type\":\"address\"}],\"name\":\"owedPayment\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"requestNewRound\",\"outputs\":[{\"internalType\":\"uint80\",\"name\":\"\",\"type\":\"uint80\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint32\",\"name\":\"maximumGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"reasonableGasPriceGwei\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"observationPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint32\",\"name\":\"transmissionPaymentGjuels\",\"type\":\"uint32\"},{\"internalType\":\"uint24\",\"name\":\"accountingGas\",\"type\":\"uint24\"}],\"name\":\"setBilling\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"_billingAccessController\",\"type\":\"address\"}],\"name\":\"setBillingAccessController\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"signers\",\"type\":\"address[]\"},{\"internalType\":\"address[]\",\"name\":\"transmitters\",\"type\":\"address[]\"},{\"internalType\":\"uint8\",\"name\":\"f\",\"type\":\"uint8\"},{\"internalType\":\"bytes\",\"name\":\"onchainConfig\",\"type\":\"bytes\"},{\"internalType\":\"uint64\",\"name\":\"offchainConfigVersion\",\"type\":\"uint64\"},{\"internalType\":\"bytes\",\"name\":\"offchainConfig\",\"type\":\"bytes\"}],\"name\":\"setConfig\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractLinkTokenInterface\",\"name\":\"linkToken\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"}],\"name\":\"setLinkToken\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"transmitters\",\"type\":\"address[]\"},{\"internalType\":\"address[]\",\"name\":\"payees\",\"type\":\"address[]\"}],\"name\":\"setPayees\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractAccessControllerInterface\",\"name\":\"requesterAccessController\",\"type\":\"address\"}],\"name\":\"setRequesterAccessController\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contractAggregatorValidatorInterface\",\"name\":\"newValidator\",\"type\":\"address\"},{\"internalType\":\"uint32\",\"name\":\"newGasLimit\",\"type\":\"uint32\"}],\"name\":\"setValidatorConfig\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"proposed\",\"type\":\"address\"}],\"name\":\"transferPayeeship\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32[3]\",\"name\":\"reportContext\",\"type\":\"bytes32[3]\"},{\"internalType\":\"bytes\",\"name\":\"report\",\"type\":\"bytes\"},{\"internalType\":\"bytes32[]\",\"name\":\"rs\",\"type\":\"bytes32[]\"},{\"internalType\":\"bytes32[]\",\"name\":\"ss\",\"type\":\"bytes32[]\"},{\"internalType\":\"bytes32\",\"name\":\"rawVs\",\"type\":\"bytes32\"}],\"name\":\"transmit\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"typeAndVersion\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"version\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"withdrawFunds\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"transmitter\",\"type\":\"address\"}],\"name\":\"withdrawPayment\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]","chainReaderDefinitions":{"LatestTransmissionDetails":{"chainSpecificName":"latestTransmissionDetails","readType":0,"output_modifications":[{"type":"rename","fields":{"LatestAnswer_":"LatestAnswer","LatestTimestamp_":"LatestTimestamp"}}]},"LatestRoundRequested":{"chainSpecificName":"RoundRequested","params":{"requester":""},"readType":1}}}}}`
+				ocrSpec.OCR2OracleSpec.RelayConfig["codec"] = `{"chainCodecConfig" :{"MedianReport":{"TypeAbi": "[{\"Name\": \"Timestamp\",\"Type\": \"uint32\"},{\"Name\": \"Observers\",\"Type\": \"bytes32\"},{\"Name\": \"Observations\",\"Type\": \"int192[]\"},{\"Name\": \"JuelsPerFeeCoin\",\"Type\": \"int192\"}]"}}}`
+			}
+
 			_, err = chainlinkNode.MustCreateJob(ocrSpec)
 			if err != nil {
 				return fmt.Errorf("creating OCR task job on OCR node have failed: %w", err)
diff --git a/integration-tests/client/chainlink_models.go b/integration-tests/client/chainlink_models.go
index e6e1de25e41..41fdebac94c 100644
--- a/integration-tests/client/chainlink_models.go
+++ b/integration-tests/client/chainlink_models.go
@@ -1110,7 +1110,12 @@ observationSource                      = """
 {{$key}} = {{$value}}{{end}}
 {{end}}
 [relayConfig]{{range $key, $value := .RelayConfig}}
-{{$key}} = {{$value}}{{end}}
+  {{if or (eq $key "chainReader") (eq $key "codec")}}
+    {{$key}} = '{{$value}}'
+  {{else}}
+    {{$key}} = {{$value}}
+  {{end}}
+{{end}}
 `
 	return MarshallTemplate(specWrap, "OCR2 Job", ocr2TemplateString)
 }
diff --git a/integration-tests/go.mod b/integration-tests/go.mod
index 1c55ce92c3a..d3757cfe14a 100644
--- a/integration-tests/go.mod
+++ b/integration-tests/go.mod
@@ -96,7 +96,6 @@ require (
 	github.com/bgentry/speakeasy v0.1.1-0.20220910012023-760eaf8b6816 // indirect
 	github.com/blendle/zapdriver v1.3.1 // indirect
 	github.com/btcsuite/btcd/btcec/v2 v2.3.2 // indirect
-	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 // indirect
 	github.com/buger/jsonparser v1.1.1 // indirect
 	github.com/bytedance/sonic v1.10.1 // indirect
 	github.com/c2h5oh/datasize v0.0.0-20220606134207-859f65c6625b // indirect
@@ -356,11 +355,11 @@ require (
 	github.com/shopspring/decimal v1.3.1 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/smartcontractkit/caigo v0.0.0-20230621050857-b29a4ca8c704 // indirect
-	github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231128204301-ee4297eff679 // indirect
+	github.com/smartcontractkit/chainlink-cosmos v0.4.1-0.20231222201016-da3f0a763f71 // indirect
 	github.com/smartcontractkit/chainlink-data-streams v0.0.0-20231204152908-a6e3fe8ff2a1 // indirect
-	github.com/smartcontractkit/chainlink-feeds v0.0.0-20231213175155-181d4a261f5d // indirect
-	github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231130211003-6d1bb2f0b68a // indirect
-	github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231128204445-3d61b12a0006 // indirect
+	github.com/smartcontractkit/chainlink-feeds v0.0.0-20231222013040-c93f24a1b105 // indirect
+	github.com/smartcontractkit/chainlink-solana v1.0.3-0.20231222220348-c7d81beaf8fd // indirect
+	github.com/smartcontractkit/chainlink-starknet/relayer v0.0.1-beta-test.0.20231221191127-1f32389044ea // indirect
 	github.com/smartcontractkit/tdh2/go/ocr2/decryptionplugin v0.0.0-20230906073235-9e478e5e19f1 // indirect
 	github.com/smartcontractkit/wsrpc v0.7.2 // indirect
 	github.com/soheilhy/cmux v0.1.5 // indirect
diff --git a/integration-tests/go.sum b/integration-tests/go.sum
index 15f0bb18807..e98b1552f96 100644
--- a/integration-tests/go.sum
+++ b/integration-tests/go.sum
@@ -222,8 +222,8 @@ github.com/btcsuite/btcd/btcec/v2 v2.3.2 h1:5n0X6hX0Zk+6omWcihdYvdAlGf2DfasC0GMf
 github.com/btcsuite/btcd/btcec/v2 v2.3.2/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04=
 github.com/btcsuite/btcd/btcutil v1.1.2 h1:XLMbX8JQEiwMcYft2EGi8zPUkoa0abKIU6/BJSRsjzQ=
 github.com/btcsuite/btcd/btcutil v1.1.2/go.mod h1:UR7dsSJzJUfMmFiiLlIrMq1lS9jh9EdCV7FStZSnpi0=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.3 h1:SDlJ7bAm4ewvrmZtR0DaiYbQGdKPeaaIm7bM+qRhFeU=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.3/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/bufbuild/protocompile v0.4.0 h1:LbFKd2XowZvQ/kajzguUp2DC9UEIQhIq77fZZlaQsNA=
 github.com/bufbuild/protocompile v0.4.0/go.mod h1:3v93+mbWn/v3xzN+31nwkJfrEpAUwp+BagBSZWx+TP8=
 github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=
@@ -1467,16 +1467,16 @@ github.com/smartcontractkit/chainlink-automation v1.0.1 h1:vVjBFq2Zsz21kPy1Pb0wp
 github.com/smartcontractkit/chainlink-automation v1.0.1/go.mod h1:INSchkV3ntyDdlZKGWA030MPDpp6pbeuiRkRKYFCm2k=
 github.com/smartcontractkit/chainlink-common v0.1.7-0.20231222013743-f67285bba7bd h1:DsExL564kL/YwKWvUIMUKgdcpUE4Ryfi0aYIS/uXxmY=
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diff --git a/integration-tests/smoke/forwarders_ocr2_test.go b/integration-tests/smoke/forwarders_ocr2_test.go
index 71d35508175..5bf7cc57030 100644
--- a/integration-tests/smoke/forwarders_ocr2_test.go
+++ b/integration-tests/smoke/forwarders_ocr2_test.go
@@ -78,7 +78,7 @@ func TestForwarderOCR2Basic(t *testing.T) {
 	err = env.EVMClient.WaitForEvents()
 	require.NoError(t, err, "Error waiting for events")
 
-	err = actions.CreateOCRv2JobsLocal(ocrInstances, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), true)
+	err = actions.CreateOCRv2JobsLocal(ocrInstances, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), true, false)
 	require.NoError(t, err, "Error creating OCRv2 jobs with forwarders")
 	err = env.EVMClient.WaitForEvents()
 	require.NoError(t, err, "Error waiting for events")
diff --git a/integration-tests/smoke/ocr2_test.go b/integration-tests/smoke/ocr2_test.go
index 266fcea6382..b0a4950b5c9 100644
--- a/integration-tests/smoke/ocr2_test.go
+++ b/integration-tests/smoke/ocr2_test.go
@@ -23,12 +23,17 @@ import (
 func TestOCRv2Basic(t *testing.T) {
 	t.Parallel()
 
+	noMedianPlugin := map[string]string{string(env.MedianPluginCmd): ""}
+	medianPlugin := map[string]string{string(env.MedianPluginCmd): "chainlink-feeds"}
 	for _, test := range []struct {
-		name string
-		env  map[string]string
+		name                string
+		env                 map[string]string
+		chainReaderAndCodec bool
 	}{
-		{"legacy", map[string]string{string(env.MedianPluginCmd): ""}},
-		{"plugins", map[string]string{string(env.MedianPluginCmd): "chainlink-feeds"}},
+		{"legacy", noMedianPlugin, false},
+		{"legacy-chain-reader", noMedianPlugin, true},
+		{"plugins", medianPlugin, false},
+		{"plugins-chain-reader", medianPlugin, true},
 	} {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
@@ -81,7 +86,7 @@ func TestOCRv2Basic(t *testing.T) {
 			aggregatorContracts, err := actions.DeployOCRv2Contracts(1, linkToken, env.ContractDeployer, transmitters, env.EVMClient, ocrOffchainOptions)
 			require.NoError(t, err, "Error deploying OCRv2 aggregator contracts")
 
-			err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), false)
+			err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), false, test.chainReaderAndCodec)
 			require.NoError(t, err, "Error creating OCRv2 jobs")
 
 			ocrv2Config, err := actions.BuildMedianOCR2ConfigLocal(workerNodes, ocrOffchainOptions)
@@ -163,7 +168,7 @@ func TestOCRv2Request(t *testing.T) {
 	aggregatorContracts, err := actions.DeployOCRv2Contracts(1, linkToken, env.ContractDeployer, transmitters, env.EVMClient, ocrOffchainOptions)
 	require.NoError(t, err, "Error deploying OCRv2 aggregator contracts")
 
-	err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), false)
+	err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), false, false)
 	require.NoError(t, err, "Error creating OCRv2 jobs")
 
 	ocrv2Config, err := actions.BuildMedianOCR2ConfigLocal(workerNodes, ocrOffchainOptions)
@@ -239,7 +244,7 @@ func TestOCRv2JobReplacement(t *testing.T) {
 	aggregatorContracts, err := actions.DeployOCRv2Contracts(1, linkToken, env.ContractDeployer, transmitters, env.EVMClient, ocrOffchainOptions)
 	require.NoError(t, err, "Error deploying OCRv2 aggregator contracts")
 
-	err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), false)
+	err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 5, env.EVMClient.GetChainID().Uint64(), false, false)
 	require.NoError(t, err, "Error creating OCRv2 jobs")
 
 	ocrv2Config, err := actions.BuildMedianOCR2ConfigLocal(workerNodes, ocrOffchainOptions)
@@ -275,7 +280,7 @@ func TestOCRv2JobReplacement(t *testing.T) {
 	err = actions.DeleteBridges(nodeClients)
 	require.NoError(t, err)
 
-	err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 15, env.EVMClient.GetChainID().Uint64(), false)
+	err = actions.CreateOCRv2JobsLocal(aggregatorContracts, bootstrapNode, workerNodes, env.MockAdapter, "ocr2", 15, env.EVMClient.GetChainID().Uint64(), false, false)
 	require.NoError(t, err, "Error creating OCRv2 jobs")
 
 	err = actions.WatchNewOCR2Round(3, aggregatorContracts, env.EVMClient, time.Minute*3, l)