change hardcoded null client chain id

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/smartcontractkit/chainlink-common v0.6.1-0.20250407100046-dfdf9600557b
 	github.com/smartcontractkit/chainlink-framework/capabilities v0.0.0-20250408161305-721208f43882
 	github.com/smartcontractkit/chainlink-framework/chains v0.0.0-20250325121830-cfa9bf24c4f5
-	github.com/smartcontractkit/chainlink-framework/multinode v0.0.0-20250402142713-6529d36f91f3
+	github.com/smartcontractkit/chainlink-framework/multinode v0.0.0-20250409130234-ce7ec3a90ffd
 	github.com/stretchr/testify v1.10.0
 	github.com/tidwall/gjson v1.18.0
 	github.com/ugorji/go/codec v1.2.12

go.sum

@@ -567,8 +567,8 @@ github.com/smartcontractkit/chainlink-framework/capabilities v0.0.0-202504081613
 github.com/smartcontractkit/chainlink-framework/capabilities v0.0.0-20250408161305-721208f43882/go.mod h1:NVoJQoPYr6BorpaXTusoIH1IYTySCmanQ8Q1yv3mNh4=
 github.com/smartcontractkit/chainlink-framework/chains v0.0.0-20250325121830-cfa9bf24c4f5 h1:3uQneNhdLsJToTKCV8/o2bsdn0e70sndSwxEiTEctgw=
 github.com/smartcontractkit/chainlink-framework/chains v0.0.0-20250325121830-cfa9bf24c4f5/go.mod h1:tHem58EihQh63kR2LlAOKDAs9Vbghf1dJKZRGy6LG8g=
-github.com/smartcontractkit/chainlink-framework/multinode v0.0.0-20250402142713-6529d36f91f3 h1:8+2KFkPYdCK9lHMK5D/+adw02iIjEV+5Uw4s7nMNsRI=
-github.com/smartcontractkit/chainlink-framework/multinode v0.0.0-20250402142713-6529d36f91f3/go.mod h1:UsezB/51EAJ9FEBGn6ad2YtssgzWEIEpp3HyRM6a6iM=
+github.com/smartcontractkit/chainlink-framework/multinode v0.0.0-20250409130234-ce7ec3a90ffd h1:fbOLXL+Fa7rZZX0oPhHk7dsmpfzk97qioUkJcCeyBR8=
+github.com/smartcontractkit/chainlink-framework/multinode v0.0.0-20250409130234-ce7ec3a90ffd/go.mod h1:UsezB/51EAJ9FEBGn6ad2YtssgzWEIEpp3HyRM6a6iM=
 github.com/smartcontractkit/libocr v0.0.0-20250328171017-609ec10a5510 h1:gm8Jli0sdkrZYnrWBngAkPSDzFDkdNCy1/Dj86kVtYk=
 github.com/smartcontractkit/libocr v0.0.0-20250328171017-609ec10a5510/go.mod h1:Mb7+/LC4edz7HyHxX4QkE42pSuov4AV68+AxBXAap0o=
 github.com/smarty/assertions v1.15.0/go.mod h1:yABtdzeQs6l1brC900WlRNwj6ZR55d7B+E8C6HtKdec=

pkg/client/chain_client_test.go

@@ -786,7 +786,7 @@ func TestEthClient_ErroringClient(t *testing.T) {
 	require.Equal(t, multinode.ErrNodeError, err)
 
 	id := erroringClient.ConfiguredChainID()
-	require.Equal(t, id, big.NewInt(0))
+	require.Equal(t, id, big.NewInt(evmtypes.NullClientChainID))
 
 	_, err = erroringClient.CodeAt(ctx, common.Address{}, nil)
 	require.Equal(t, multinode.ErrNodeError, err)

pkg/client/clienttest/clienttest.go

@@ -8,11 +8,13 @@ import (
 
 	"github.com/ethereum/go-ethereum"
 	"github.com/stretchr/testify/mock"
+
+	"github.com/smartcontractkit/chainlink-evm/pkg/types"
 )
 
 func NewClientWithDefaultChainID(t testing.TB) *Client {
 	c := NewClient(t)
-	c.On("ConfiguredChainID").Return(big.NewInt(0)).Maybe()
+	c.On("ConfiguredChainID").Return(big.NewInt(types.NullClientChainID)).Maybe()
 	return c
 }
 

pkg/client/null_client.go

@@ -26,8 +26,9 @@ func NewNullClient(cid *big.Int, lggr logger.Logger) *NullClient {
 }
 
 // NullClientChainID the ChainID that nullclient will return
-// 0 is never used as a real chain ID so makes sense as a dummy value here
-const NullClientChainID = 0
+// hardcoded chainId is never used as a real chain ID so makes sense as a dummy value here
+// can't use 0 because of introduced in geth 1.15.7 contraint 0 for chain id
+const NullClientChainID = evmtypes.NullClientChainID
 
 //
 // Client methods

pkg/config/configtest/configtest.go

@@ -5,11 +5,12 @@ import (
 
 	"github.com/smartcontractkit/chainlink-evm/pkg/config"
 	"github.com/smartcontractkit/chainlink-evm/pkg/config/toml"
+	"github.com/smartcontractkit/chainlink-evm/pkg/types"
 	"github.com/smartcontractkit/chainlink-evm/pkg/utils/big"
 )
 
 func NewChainScopedConfig(t testing.TB, overrideFn func(c *toml.EVMConfig)) *config.ChainScoped {
-	chainID := big.NewI(0)
+	chainID := big.NewI(types.NullClientChainID)
 	evmCfg := &toml.EVMConfig{
 		ChainID: chainID,
 		Chain:   toml.Defaults(chainID),

pkg/testutils/evmtypes.go

@@ -22,7 +22,7 @@ import (
 // FixtureChainID matches the chain always added by fixtures.sql
 // It is set to 0 since no real chain ever has this ID and allows a virtual
 // "test" chain ID to be used without clashes
-var FixtureChainID = big.NewInt(0)
+var FixtureChainID = big.NewInt(evmtypes.NullClientChainID)
 
 // SimulatedChainID is the chain ID for the go-ethereum simulated backend
 var SimulatedChainID = big.NewInt(1337)

pkg/types/utils.go

@@ -6,6 +6,8 @@ import (
 	"github.com/ethereum/go-ethereum/accounts/abi"
 )
 
+const NullClientChainID = 1399100
+
 func MustGetABI(json string) abi.ABI {
 	abi, err := abi.JSON(strings.NewReader(json))
 	if err != nil {