diff --git a/examples/app-ofa-private/main.go b/examples/app-ofa-private/main.go
index 7622468..93b5637 100644
--- a/examples/app-ofa-private/main.go
+++ b/examples/app-ofa-private/main.go
@@ -27,8 +27,9 @@ func main() {
 	testAddr1 := framework.GeneratePrivKey()
 	testAddr2 := framework.GeneratePrivKey()
 
-	fundBalance := big.NewInt(100000000)
+	fundBalance := big.NewInt(100000000000000000)
 	fr.FundAccount(testAddr1.Address(), fundBalance)
+	fr.FundAccount(testAddr2.Address(), fundBalance)
 
 	targeAddr := testAddr1.Address()
 
@@ -58,7 +59,8 @@ func main() {
 	bundleBytes, _ := json.Marshal(bundle)
 
 	// new bid inputs
-	receipt := contract.SendTransaction("newOrder", []interface{}{}, bundleBytes)
+	contractAddr1 := contract.Ref(testAddr1)
+	receipt := contractAddr1.SendTransaction("newOrder", []interface{}{}, bundleBytes)
 
 	hintEvent := &HintEvent{}
 	if err := hintEvent.Unpack(receipt.Logs[0]); err != nil {
@@ -77,7 +79,8 @@ func main() {
 	backRunBundleBytes, _ := json.Marshal(backRunBundle)
 
 	// backrun inputs
-	receipt = contract.SendTransaction("newMatch", []interface{}{hintEvent.BidId}, backRunBundleBytes)
+	contractAddr2 := contract.Ref(testAddr2)
+	receipt = contractAddr2.SendTransaction("newMatch", []interface{}{hintEvent.BidId}, backRunBundleBytes)
 
 	matchEvent := &HintEvent{}
 	if err := matchEvent.Unpack(receipt.Logs[0]); err != nil {
diff --git a/framework/framework.go b/framework/framework.go
index 1567689..47fc441 100644
--- a/framework/framework.go
+++ b/framework/framework.go
@@ -90,6 +90,10 @@ func GeneratePrivKey() *PrivKey {
 
 type Contract struct {
 	*sdk.Contract
+
+	addr common.Address
+	abi  *abi.ABI
+	fr   *Framework
 }
 
 func (c *Contract) SendTransaction(method string, args []interface{}, confidentialBytes []byte) *types.Receipt {
@@ -164,7 +168,23 @@ func (f *Framework) DeployContract(path string) *Contract {
 	}
 
 	contract := sdk.GetContract(receipt.ContractAddress, artifact.Abi, f.clt)
-	return &Contract{Contract: contract}
+	return &Contract{addr: receipt.ContractAddress, fr: f, abi: artifact.Abi, Contract: contract}
+}
+
+func (c *Contract) Ref(acct *PrivKey) *Contract {
+	cc := &Contract{
+		addr:     c.addr,
+		abi:      c.abi,
+		fr:       c.fr,
+		Contract: sdk.GetContract(c.addr, c.abi, c.fr.NewClient(acct)),
+	}
+	return cc
+}
+
+func (f *Framework) NewClient(acct *PrivKey) *sdk.Client {
+	cc := DefaultConfig()
+	rpc, _ := rpc.Dial(cc.KettleRPC)
+	return sdk.NewClient(rpc, acct.Priv, cc.KettleAddr)
 }
 
 func (f *Framework) SignTx(priv *PrivKey, tx *types.LegacyTx) (*types.Transaction, error) {