diff --git a/api/message/json/codec_test.go b/api/message/json/codec_test.go
index 7e0aec0..590720c 100644
--- a/api/message/json/codec_test.go
+++ b/api/message/json/codec_test.go
@@ -10,12 +10,13 @@ import (
 
 func TestJson_EncodeActionTrace(t *testing.T) {
 	msg := message.ActionTrace{
-		TxID:      "ed3b8e853647971cf8296f004c3a1aeac255f082b2cb3c12cc3222e2d7c174ab",
-		BlockNum:  267372365,
-		Timestamp: time.Unix(1048267389, int64(time.Millisecond)*500).UTC(),
-		Name:      "transfer",
-		Contract:  "eosio",
-		Receiver:  "account2",
+		TxID:          "ed3b8e853647971cf8296f004c3a1aeac255f082b2cb3c12cc3222e2d7c174ab",
+		BlockNum:      267372365,
+		Timestamp:     time.Unix(1048267389, int64(time.Millisecond)*500).UTC(),
+		Name:          "transfer",
+		Contract:      "eosio",
+		Receiver:      "account2",
+		FirstReceiver: true,
 		Receipt: &message.ActionReceipt{
 			Receiver:       "account2",
 			ActDigest:      "0a2c71dba327cf13a107d3a4f91c9c98f510a8fbbb483b233e222033f13a3e36",
@@ -43,7 +44,7 @@ func TestJson_EncodeActionTrace(t *testing.T) {
 		Return: []byte{0xde, 0xad, 0xbe, 0xef},
 	}
 
-	expected := `{"tx_id":"ed3b8e853647971cf8296f004c3a1aeac255f082b2cb3c12cc3222e2d7c174ab","blocknum":267372365,"blocktimestamp":"2003-03-21T17:23:09.500","receipt":{"receiver":"account2","act_digest":"0a2c71dba327cf13a107d3a4f91c9c98f510a8fbbb483b233e222033f13a3e36","global_sequence":2329381932,"recv_sequence":22,"auth_sequence":[{"account":"account1","sequence":1382772}],"code_sequence":1122,"abi_sequence":12352},"name":"transfer","contract":"eosio","receiver":"account2","data":{"from":"account1","quantity":"1000.0000 WAX","to":"account2"},"authorization":[{"actor":"account1","permission":"active"}],"except":"errstr","error":2,"return":"3q2+7w=="}`
+	expected := `{"tx_id":"ed3b8e853647971cf8296f004c3a1aeac255f082b2cb3c12cc3222e2d7c174ab","blocknum":267372365,"blocktimestamp":"2003-03-21T17:23:09.500","receipt":{"receiver":"account2","act_digest":"0a2c71dba327cf13a107d3a4f91c9c98f510a8fbbb483b233e222033f13a3e36","global_sequence":2329381932,"recv_sequence":22,"auth_sequence":[{"account":"account1","sequence":1382772}],"code_sequence":1122,"abi_sequence":12352},"name":"transfer","contract":"eosio","receiver":"account2","first_receiver":true,"data":{"from":"account1","quantity":"1000.0000 WAX","to":"account2"},"authorization":[{"actor":"account1","permission":"active"}],"except":"errstr","error":2,"return":"3q2+7w=="}`
 
 	data, err := createCodec().Encoder(msg)
 	assert.NoError(t, err)
@@ -52,12 +53,13 @@ func TestJson_EncodeActionTrace(t *testing.T) {
 
 func TestJson_DecodeActionTrace(t *testing.T) {
 	expected := message.ActionTrace{
-		TxID:      "952989f7464237b6cf9926e533ecd331df6794ed07564bd052bc368cbd65b4bc",
-		BlockNum:  8723971,
-		Timestamp: time.Unix(1718957306, int64(time.Millisecond)*500).UTC(),
-		Name:      "transfer",
-		Contract:  "eosio",
-		Receiver:  "account2",
+		TxID:          "952989f7464237b6cf9926e533ecd331df6794ed07564bd052bc368cbd65b4bc",
+		BlockNum:      8723971,
+		Timestamp:     time.Unix(1718957306, int64(time.Millisecond)*500).UTC(),
+		Name:          "transfer",
+		Contract:      "eosio",
+		Receiver:      "account2",
+		FirstReceiver: true,
 		Receipt: &message.ActionReceipt{
 			Receiver:       "account2",
 			ActDigest:      "f2f682847fd5bf00fb315b075dc00b4ff0ce18776758077b86a233dea49dc047",
@@ -85,7 +87,7 @@ func TestJson_DecodeActionTrace(t *testing.T) {
 		Return: []byte{0xde, 0xad, 0xbe, 0xef},
 	}
 
-	input := `{"tx_id":"952989f7464237b6cf9926e533ecd331df6794ed07564bd052bc368cbd65b4bc","blocknum":8723971,"blocktimestamp":"2024-06-21T08:08:26.500","receipt":{"receiver":"account2","act_digest":"f2f682847fd5bf00fb315b075dc00b4ff0ce18776758077b86a233dea49dc047","global_sequence":287328,"recv_sequence":42,"auth_sequence":[{"account":"account1","sequence":271877283}],"code_sequence":237823,"abi_sequence":68323},"name":"transfer","contract":"eosio","receiver":"account2","data":{"from":"account1","quantity":"1000.0000 WAX","to":"account2"},"authorization":[{"actor":"account1","permission":"active"}],"except":"errstr","error":2,"return":"3q2+7w=="}`
+	input := `{"tx_id":"952989f7464237b6cf9926e533ecd331df6794ed07564bd052bc368cbd65b4bc","blocknum":8723971,"blocktimestamp":"2024-06-21T08:08:26.500","receipt":{"receiver":"account2","act_digest":"f2f682847fd5bf00fb315b075dc00b4ff0ce18776758077b86a233dea49dc047","global_sequence":287328,"recv_sequence":42,"auth_sequence":[{"account":"account1","sequence":271877283}],"code_sequence":237823,"abi_sequence":68323},"name":"transfer","contract":"eosio","receiver":"account2","first_receiver":true,"data":{"from":"account1","quantity":"1000.0000 WAX","to":"account2"},"authorization":[{"actor":"account1","permission":"active"}],"except":"errstr","error":2,"return":"3q2+7w=="}`
 
 	msg := message.ActionTrace{}
 	err := createCodec().Decoder([]byte(input), &msg)
@@ -129,12 +131,13 @@ func TestJson_EncodeTransactionTrace(t *testing.T) {
 				Return: []byte{0x08, 0xf1},
 			},
 			{
-				TxID:      tx_id,
-				BlockNum:  block_num,
-				Timestamp: ts,
-				Receiver:  "coolgame",
-				Contract:  "coolgame",
-				Name:      "addpoints",
+				TxID:          tx_id,
+				BlockNum:      block_num,
+				Timestamp:     ts,
+				Receiver:      "coolgame",
+				Contract:      "coolgame",
+				FirstReceiver: true,
+				Name:          "addpoints",
 				Authorization: []message.PermissionLevel{
 					{
 						Actor:      "coolgame",
@@ -153,7 +156,7 @@ func TestJson_EncodeTransactionTrace(t *testing.T) {
 		Error:  2,
 	}
 
-	expected := `{"id":"ed04516bdd1194aa5f0ab4c8c5445eec542c17f45a85bb3e9e4bc33e1a2486f8","blocknum":283781923,"blocktimestamp":"2029-02-08T15:10:05.500","status":"executed","cpu_usage_us":442,"net_usage_words":16,"elapsed":22,"net_usage":128,"scheduled":true,"action_traces":[{"tx_id":"ed04516bdd1194aa5f0ab4c8c5445eec542c17f45a85bb3e9e4bc33e1a2486f8","blocknum":283781923,"blocktimestamp":"2029-02-08T15:10:05.500","name":"mine","contract":"coolgame","receiver":"actor01","data":{"equipment_id":1234,"location_id":5445453},"authorization":[{"actor":"actor01","permission":"active"}],"except":"","error":0,"return":"CPE="},{"tx_id":"ed04516bdd1194aa5f0ab4c8c5445eec542c17f45a85bb3e9e4bc33e1a2486f8","blocknum":283781923,"blocktimestamp":"2029-02-08T15:10:05.500","name":"addpoints","contract":"coolgame","receiver":"coolgame","data":{"points":"1023.0423 SCAM"},"authorization":[{"actor":"coolgame","permission":"usrpoints"}],"except":"some error string","error":2,"return":"/wI="}],"except":"errstr","error":2}`
+	expected := `{"id":"ed04516bdd1194aa5f0ab4c8c5445eec542c17f45a85bb3e9e4bc33e1a2486f8","blocknum":283781923,"blocktimestamp":"2029-02-08T15:10:05.500","status":"executed","cpu_usage_us":442,"net_usage_words":16,"elapsed":22,"net_usage":128,"scheduled":true,"action_traces":[{"tx_id":"ed04516bdd1194aa5f0ab4c8c5445eec542c17f45a85bb3e9e4bc33e1a2486f8","blocknum":283781923,"blocktimestamp":"2029-02-08T15:10:05.500","name":"mine","contract":"coolgame","receiver":"actor01","first_receiver":false,"data":{"equipment_id":1234,"location_id":5445453},"authorization":[{"actor":"actor01","permission":"active"}],"except":"","error":0,"return":"CPE="},{"tx_id":"ed04516bdd1194aa5f0ab4c8c5445eec542c17f45a85bb3e9e4bc33e1a2486f8","blocknum":283781923,"blocktimestamp":"2029-02-08T15:10:05.500","name":"addpoints","contract":"coolgame","receiver":"coolgame","first_receiver":true,"data":{"points":"1023.0423 SCAM"},"authorization":[{"actor":"coolgame","permission":"usrpoints"}],"except":"some error string","error":2,"return":"/wI="}],"except":"errstr","error":2}`
 
 	data, err := createCodec().Encoder(msg)
 	assert.NoError(t, err)
@@ -165,7 +168,7 @@ func TestJson_DecodeTransactionTrace(t *testing.T) {
 	ts := time.Unix(1730755743, int64(time.Millisecond)*500).UTC()
 	block_num := uint32(2378197231)
 
-	input := `{"id":"f58bf8a0137fcea644dbc2b0cc5b6a017a848cd33b2e924703e7e3c6d1ca0c2e","blocknum":2378197231,"blocktimestamp":"2024-11-04T21:29:03.500","status":"executed","cpu_usage_us":442,"net_usage_words":16,"elapsed":22,"net_usage":128,"scheduled":true,"action_traces":[{"tx_id":"f58bf8a0137fcea644dbc2b0cc5b6a017a848cd33b2e924703e7e3c6d1ca0c2e","blocknum":2378197231,"blocktimestamp":"2024-11-04T21:29:03.500","receipt":{"receiver":"actor01","act_digest":"bf68a227a617aa9138215d31a2847005175f01151c6feeaeb6513fe2d090ff3a","global_sequence":47322,"recv_sequence":23289,"auth_sequence":[{"account":"actor01","sequence":56637232}],"code_sequence":98272,"abi_sequence":6823762},"name":"mine","contract":"","receiver":"actor01","data":{"equipment_id":1234,"location_id":5445453},"authorization":[{"actor":"actor01","permission":"active"}],"except":"","error":2,"return":"AQI="},{"tx_id":"f58bf8a0137fcea644dbc2b0cc5b6a017a848cd33b2e924703e7e3c6d1ca0c2e","blocknum":2378197231,"blocktimestamp":"2024-11-04T21:29:03.500","name":"addpoints","contract":"","receiver":"coolgame","data":{"points":"1023.0423 SCAM"},"authorization":[{"actor":"coolgame","permission":"usrpoints"}],"except":"","error":2,"return":"CPE="}],"except":"errstr","error":2}`
+	input := `{"id":"f58bf8a0137fcea644dbc2b0cc5b6a017a848cd33b2e924703e7e3c6d1ca0c2e","blocknum":2378197231,"blocktimestamp":"2024-11-04T21:29:03.500","status":"executed","cpu_usage_us":442,"net_usage_words":16,"elapsed":22,"net_usage":128,"scheduled":true,"action_traces":[{"tx_id":"f58bf8a0137fcea644dbc2b0cc5b6a017a848cd33b2e924703e7e3c6d1ca0c2e","blocknum":2378197231,"blocktimestamp":"2024-11-04T21:29:03.500","receipt":{"receiver":"actor01","act_digest":"bf68a227a617aa9138215d31a2847005175f01151c6feeaeb6513fe2d090ff3a","global_sequence":47322,"recv_sequence":23289,"auth_sequence":[{"account":"actor01","sequence":56637232}],"code_sequence":98272,"abi_sequence":6823762},"name":"mine","contract":"coolgame","receiver":"actor01","first_receiver":false,"data":{"equipment_id":1234,"location_id":5445453},"authorization":[{"actor":"actor01","permission":"active"}],"except":"","error":2,"return":"AQI="},{"tx_id":"f58bf8a0137fcea644dbc2b0cc5b6a017a848cd33b2e924703e7e3c6d1ca0c2e","blocknum":2378197231,"blocktimestamp":"2024-11-04T21:29:03.500","name":"addpoints","contract":"coolgame","receiver":"coolgame","first_receiver":true,"data":{"points":"1023.0423 SCAM"},"authorization":[{"actor":"coolgame","permission":"usrpoints"}],"except":"","error":2,"return":"CPE="}],"except":"errstr","error":2}`
 
 	expected := message.TransactionTrace{
 		Timestamp:     ts,
@@ -183,6 +186,7 @@ func TestJson_DecodeTransactionTrace(t *testing.T) {
 				BlockNum:  block_num,
 				Timestamp: ts,
 				Receiver:  "actor01",
+				Contract:  "coolgame",
 				Name:      "mine",
 				Receipt: &message.ActionReceipt{
 					Receiver:       "actor01",
@@ -212,11 +216,13 @@ func TestJson_DecodeTransactionTrace(t *testing.T) {
 				Return: []byte{0x01, 0x02},
 			},
 			{
-				TxID:      tx_id,
-				BlockNum:  block_num,
-				Timestamp: ts,
-				Receiver:  "coolgame",
-				Name:      "addpoints",
+				TxID:          tx_id,
+				BlockNum:      block_num,
+				Timestamp:     ts,
+				Receiver:      "coolgame",
+				Contract:      "coolgame",
+				FirstReceiver: true,
+				Name:          "addpoints",
 				Authorization: []message.PermissionLevel{
 					{
 						Actor:      "coolgame",