diff --git a/internal/pos/eip712.go b/internal/pos/eip712.go
index 125c6b5e..b19065b5 100644
--- a/internal/pos/eip712.go
+++ b/internal/pos/eip712.go
@@ -7,7 +7,6 @@ import (
 	"github.com/KenshiTech/unchained/config"
 	"github.com/KenshiTech/unchained/ethereum/contracts"
 	"github.com/KenshiTech/unchained/log"
-	"github.com/KenshiTech/unchained/pos/eip712"
 
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
@@ -31,7 +30,7 @@ func (s *Repository) Slash(address [20]byte, to common.Address, amount *big.Int,
 		NftIds: nftIds,
 	}
 
-	signature, err := eip712.SignTransferRequest(s.evmSigner, &transfer)
+	signature, err := s.eip712Signer.SignTransferRequest(s.evmSigner, &transfer)
 
 	if err != nil {
 		log.Logger.
diff --git a/internal/pos/eip712/sign.go b/internal/pos/eip712/sign.go
index 9da7b298..dea10d08 100644
--- a/internal/pos/eip712/sign.go
+++ b/internal/pos/eip712/sign.go
@@ -11,17 +11,19 @@ import (
 	"github.com/ethereum/go-ethereum/signer/core/apitypes"
 )
 
-var domain apitypes.TypedDataDomain
+type EIP712Signer struct {
+	domain apitypes.TypedDataDomain
+}
 
-func bytesToUnchainedSignature(b []byte) *contracts.UnchainedStakingSignature {
+func (s *EIP712Signer) bytesToUnchainedSignature(signature []byte) *contracts.UnchainedStakingSignature {
 	return &contracts.UnchainedStakingSignature{
-		V: b[64],
-		R: [32]byte(b[:32]),
-		S: [32]byte(b[32:64]),
+		V: signature[64],
+		R: [32]byte(signature[:32]),
+		S: [32]byte(signature[32:64]),
 	}
 }
 
-func signEip712Message(evmSigner *ethereum.EvmSigner, data *apitypes.TypedData) (*contracts.UnchainedStakingSignature, error) {
+func (s *EIP712Signer) signEip712Message(evmSigner *ethereum.EvmSigner, data *apitypes.TypedData) (*contracts.UnchainedStakingSignature, error) {
 	domainSeparator, err := data.HashStruct("EIP712Domain", data.Domain.Map())
 	if err != nil {
 		return nil, err
@@ -44,14 +46,14 @@ func signEip712Message(evmSigner *ethereum.EvmSigner, data *apitypes.TypedData)
 		signature[64] += 27
 	}
 
-	return bytesToUnchainedSignature(signature), nil
+	return s.bytesToUnchainedSignature(signature), nil
 }
 
-func SignTransferRequest(evmSigner *ethereum.EvmSigner, request *contracts.UnchainedStakingEIP712Transfer) (*contracts.UnchainedStakingSignature, error) {
+func (s *EIP712Signer) SignTransferRequest(evmSigner *ethereum.EvmSigner, request *contracts.UnchainedStakingEIP712Transfer) (*contracts.UnchainedStakingSignature, error) {
 	data := &apitypes.TypedData{
 		Types:       Types,
 		PrimaryType: "Transfer",
-		Domain:      domain,
+		Domain:      s.domain,
 		Message: map[string]interface{}{
 			"signer": evmSigner.Address,
 			"from":   request.From,
@@ -62,14 +64,14 @@ func SignTransferRequest(evmSigner *ethereum.EvmSigner, request *contracts.Uncha
 		},
 	}
 
-	return signEip712Message(evmSigner, data)
+	return s.signEip712Message(evmSigner, data)
 }
 
-func SignSetParamsRequest(evmSigner *ethereum.EvmSigner, request *contracts.UnchainedStakingEIP712SetParams) (*contracts.UnchainedStakingSignature, error) {
+func (s *EIP712Signer) SignSetParamsRequest(evmSigner *ethereum.EvmSigner, request *contracts.UnchainedStakingEIP712SetParams) (*contracts.UnchainedStakingSignature, error) {
 	data := &apitypes.TypedData{
 		Types:       Types,
 		PrimaryType: "SetParams",
-		Domain:      domain,
+		Domain:      s.domain,
 		Message: map[string]interface{}{
 			"requester":  evmSigner.Address,
 			"token":      request.Token,
@@ -81,14 +83,14 @@ func SignSetParamsRequest(evmSigner *ethereum.EvmSigner, request *contracts.Unch
 		},
 	}
 
-	return signEip712Message(evmSigner, data)
+	return s.signEip712Message(evmSigner, data)
 }
 
-func SignSetNftPriceRequest(evmSigner *ethereum.EvmSigner, request *contracts.UnchainedStakingEIP712SetNftPrice) (*contracts.UnchainedStakingSignature, error) {
+func (s *EIP712Signer) SignSetNftPriceRequest(evmSigner *ethereum.EvmSigner, request *contracts.UnchainedStakingEIP712SetNftPrice) (*contracts.UnchainedStakingSignature, error) {
 	data := &apitypes.TypedData{
 		Types:       Types,
 		PrimaryType: "SetNftPrice",
-		Domain:      domain,
+		Domain:      s.domain,
 		Message: map[string]interface{}{
 			"requester": evmSigner.Address,
 			"nftId":     request.NftId,
@@ -97,14 +99,16 @@ func SignSetNftPriceRequest(evmSigner *ethereum.EvmSigner, request *contracts.Un
 		},
 	}
 
-	return signEip712Message(evmSigner, data)
+	return s.signEip712Message(evmSigner, data)
 }
 
-func InitDomain(chainID *big.Int, verifyingContract string) {
-	domain = apitypes.TypedDataDomain{
-		Name:              "Unchained",
-		Version:           "1.0.0",
-		ChainId:           math.NewHexOrDecimal256(chainID.Int64()),
-		VerifyingContract: verifyingContract,
+func New(chainID *big.Int, verifyingContract string) *EIP712Signer {
+	return &EIP712Signer{
+		domain: apitypes.TypedDataDomain{
+			Name:              "Unchained",
+			Version:           "1.0.0",
+			ChainId:           math.NewHexOrDecimal256(chainID.Int64()),
+			VerifyingContract: verifyingContract,
+		},
 	}
 }
diff --git a/internal/pos/pos.go b/internal/pos/pos.go
index fa3ec49e..557abbf8 100644
--- a/internal/pos/pos.go
+++ b/internal/pos/pos.go
@@ -23,6 +23,7 @@ type Repository struct {
 	lastUpdated  *xsync.MapOf[[20]byte, *big.Int]
 	base         *big.Int
 	evmSigner    *ethereum.EvmSigner
+	eip712Signer *eip712.EIP712Signer
 }
 
 func (s *Repository) GetTotalVotingPower() (*big.Int, error) {
@@ -151,7 +152,7 @@ func New(
 		return s
 	}
 
-	eip712.InitDomain(chainID, config.App.ProofOfStake.Address)
+	s.eip712Signer = eip712.New(chainID, config.App.ProofOfStake.Address)
 
 	return s
 }