feat: isolate manual verification RPC usage

- add rpc node purpose support for general/manual_verify/both
- keep scan, WSS and health checks away from manual_verify nodes
- fallback manual hash verification from general RPC to manual_verify RPC
- add public cashier hash submission path and errno responses
- update tests for RPC selection, failover and manual payment flows

src/model/dao/mdb_table_init.go

@@ -46,6 +46,7 @@ func MdbTableInit() {
 		}
 
 		seedChains()
+		backfillRpcNodePurpose()
 		seedRpcNodes()
 		seedChainTokens()
 		seedDefaultSettings()
@@ -106,14 +107,7 @@ func seedChainTokens() {
 // seedRpcNodes inserts default RPC endpoints for each chain. Checks per
 // (network, url) so re-runs are idempotent and admin edits persist.
 func seedRpcNodes() {
-	defaults := []mdb.RpcNode{
-		{Network: mdb.NetworkTron, Url: "https://api.trongrid.io", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Status: mdb.RpcNodeStatusUnknown},
-		{Network: mdb.NetworkEthereum, Url: "wss://ethereum.publicnode.com", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Status: mdb.RpcNodeStatusUnknown},
-		{Network: mdb.NetworkSolana, Url: "https://api.mainnet-beta.solana.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Status: mdb.RpcNodeStatusUnknown},
-		{Network: mdb.NetworkBsc, Url: "wss://bsc.drpc.org", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Status: mdb.RpcNodeStatusUnknown},
-		{Network: mdb.NetworkPolygon, Url: "wss://polygon-bor-rpc.publicnode.com", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Status: mdb.RpcNodeStatusUnknown},
-		{Network: mdb.NetworkPlasma, Url: "wss://rpc.plasma.to", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Status: mdb.RpcNodeStatusUnknown},
-	}
+	defaults := defaultRpcNodes()
 	for _, d := range defaults {
 		var count int64
 		if err := Mdb.Model(&mdb.RpcNode{}).
@@ -131,6 +125,29 @@ func seedRpcNodes() {
 	}
 }
 
+func defaultRpcNodes() []mdb.RpcNode {
+	defaults := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://api.trongrid.io", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkEthereum, Url: "wss://ethereum.publicnode.com", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkSolana, Url: "https://api.mainnet-beta.solana.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkBsc, Url: "wss://bsc.drpc.org", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkPolygon, Url: "wss://polygon-bor-rpc.publicnode.com", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkPlasma, Url: "wss://rpc.plasma.to", Type: mdb.RpcNodeTypeWs, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkEthereum, Url: "https://rpc.epusdt.com/ethereum", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkBsc, Url: "https://rpc.epusdt.com/binance", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkPolygon, Url: "https://rpc.epusdt.com/polygon", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusUnknown},
+	}
+	return defaults
+}
+
+func backfillRpcNodePurpose() {
+	if err := Mdb.Model(&mdb.RpcNode{}).
+		Where("purpose = '' OR purpose IS NULL").
+		Update("purpose", mdb.RpcNodePurposeGeneral).Error; err != nil {
+		color.Red.Printf("[store_db] backfill rpc_nodes purpose err=%s\n", err)
+	}
+}
+
 // seedDefaultSettings inserts built-in default settings.
 // Uses ON CONFLICT DO NOTHING so admin edits persist across restarts.
 func seedDefaultSettings() {

src/model/dao/mdb_table_init_test.go

@@ -0,0 +1,43 @@
+package dao
+
+import (
+	"testing"
+
+	"github.com/GMWalletApp/epusdt/model/mdb"
+)
+
+func TestDefaultRpcNodesIncludesManualVerifyEpusdtEvmNodes(t *testing.T) {
+	want := map[string]string{
+		mdb.NetworkEthereum: "https://rpc.epusdt.com/ethereum",
+		mdb.NetworkBsc:      "https://rpc.epusdt.com/binance",
+		mdb.NetworkPolygon:  "https://rpc.epusdt.com/polygon",
+	}
+	got := make(map[string]mdb.RpcNode)
+	for _, node := range defaultRpcNodes() {
+		if node.Purpose != mdb.RpcNodePurposeManualVerify {
+			continue
+		}
+		if _, ok := want[node.Network]; ok {
+			got[node.Network] = node
+		}
+	}
+
+	for network, url := range want {
+		node, ok := got[network]
+		if !ok {
+			t.Fatalf("missing manual_verify seed rpc node for %s", network)
+		}
+		if node.Url != url {
+			t.Fatalf("%s manual_verify seed url = %q, want %q", network, node.Url, url)
+		}
+		if node.Type != mdb.RpcNodeTypeHttp {
+			t.Fatalf("%s manual_verify seed type = %q, want %q", network, node.Type, mdb.RpcNodeTypeHttp)
+		}
+		if !node.Enabled {
+			t.Fatalf("%s manual_verify seed enabled = false, want true", network)
+		}
+		if node.Status != mdb.RpcNodeStatusUnknown {
+			t.Fatalf("%s manual_verify seed status = %q, want %q", network, node.Status, mdb.RpcNodeStatusUnknown)
+		}
+	}
+}

src/model/data/rpc_node_data.go

@@ -1,14 +1,44 @@
 package data
 
 import (
+	"fmt"
 	"math/rand"
+	"net/url"
+	"sort"
 	"strings"
+	"sync"
+	"time"
 
 	"github.com/GMWalletApp/epusdt/model/dao"
 	"github.com/GMWalletApp/epusdt/model/mdb"
 	"github.com/dromara/carbon/v2"
 )
 
+const (
+	RpcFailoverThreshold = 3
+	RpcFailoverCooldown  = 60 * time.Second
+)
+
+var gRpcFailover = struct {
+	sync.Mutex
+	failures      map[uint64]int
+	cooldownUntil map[uint64]time.Time
+}{
+	failures:      make(map[uint64]int),
+	cooldownUntil: make(map[uint64]time.Time),
+}
+
+func NormalizeRpcNodePurpose(purpose string) string {
+	switch strings.ToLower(strings.TrimSpace(purpose)) {
+	case mdb.RpcNodePurposeManualVerify:
+		return mdb.RpcNodePurposeManualVerify
+	case mdb.RpcNodePurposeBoth:
+		return mdb.RpcNodePurposeBoth
+	default:
+		return mdb.RpcNodePurposeGeneral
+	}
+}
+
 // ListRpcNodes returns rows optionally filtered by network.
 func ListRpcNodes(network string) ([]mdb.RpcNode, error) {
 	var rows []mdb.RpcNode
@@ -20,6 +50,84 @@ func ListRpcNodes(network string) ([]mdb.RpcNode, error) {
 	return rows, err
 }
 
+// ListRpcNodesForHealth returns nodes that should be probed by the periodic
+// health job. Manual verification nodes are intentionally excluded because
+// they may be paid/high-limit endpoints that should only be used on demand.
+func ListRpcNodesForHealth() ([]mdb.RpcNode, error) {
+	var rows []mdb.RpcNode
+	err := dao.Mdb.Model(&mdb.RpcNode{}).
+		Where("(purpose IN ? OR purpose = '' OR purpose IS NULL)", []string{mdb.RpcNodePurposeGeneral, mdb.RpcNodePurposeBoth}).
+		Order("id ASC").
+		Find(&rows).Error
+	return rows, err
+}
+
+// ListGeneralRpcCandidates returns enabled non-manual nodes for ordinary
+// scanners/listeners. Down nodes are skipped; ok nodes are ordered before
+// unknown/bootstrap nodes.
+func ListGeneralRpcCandidates(network, nodeType string) ([]mdb.RpcNode, error) {
+	var rows []mdb.RpcNode
+	err := dao.Mdb.Model(&mdb.RpcNode{}).
+		Where("network = ?", strings.ToLower(strings.TrimSpace(network))).
+		Where("type = ?", strings.ToLower(strings.TrimSpace(nodeType))).
+		Where("enabled = ?", true).
+		Where("(purpose IN ? OR purpose = '' OR purpose IS NULL)", []string{mdb.RpcNodePurposeGeneral, mdb.RpcNodePurposeBoth}).
+		Where("(status IN ? OR status = '' OR status IS NULL)", []string{mdb.RpcNodeStatusOk, mdb.RpcNodeStatusUnknown}).
+		Find(&rows).Error
+	if err != nil {
+		return nil, err
+	}
+
+	buckets := make([][]mdb.RpcNode, 2)
+	for _, row := range rows {
+		row.Purpose = NormalizeRpcNodePurpose(row.Purpose)
+		if row.Status == mdb.RpcNodeStatusOk {
+			buckets[0] = append(buckets[0], row)
+		} else {
+			buckets[1] = append(buckets[1], row)
+		}
+	}
+
+	out := make([]mdb.RpcNode, 0, len(rows))
+	for _, bucket := range buckets {
+		sortRpcNodes(bucket)
+		out = append(out, bucket...)
+	}
+	return out, nil
+}
+
+func SelectGeneralRpcNode(network, nodeType string, excludeIDs ...uint64) (*mdb.RpcNode, error) {
+	rows, err := ListGeneralRpcCandidates(network, nodeType)
+	if err != nil {
+		return nil, err
+	}
+	if len(rows) == 0 {
+		return nil, nil
+	}
+
+	excluded := make(map[uint64]struct{}, len(excludeIDs))
+	for _, id := range excludeIDs {
+		if id > 0 {
+			excluded[id] = struct{}{}
+		}
+	}
+	for i := range rows {
+		if _, ok := excluded[rows[i].ID]; ok {
+			continue
+		}
+		if IsRpcNodeCoolingDown(rows[i].ID) {
+			continue
+		}
+		return &rows[i], nil
+	}
+	if len(excluded) == 0 {
+		for i := range rows {
+			return &rows[i], nil
+		}
+	}
+	return nil, nil
+}
+
 // GetRpcNodeByID fetches one row.
 func GetRpcNodeByID(id uint64) (*mdb.RpcNode, error) {
 	row := new(mdb.RpcNode)
@@ -29,6 +137,7 @@ func GetRpcNodeByID(id uint64) (*mdb.RpcNode, error) {
 
 // CreateRpcNode inserts a row.
 func CreateRpcNode(row *mdb.RpcNode) error {
+	row.Purpose = NormalizeRpcNodePurpose(row.Purpose)
 	return dao.Mdb.Create(row).Error
 }
 
@@ -37,6 +146,9 @@ func UpdateRpcNodeFields(id uint64, fields map[string]interface{}) error {
 	if len(fields) == 0 {
 		return nil
 	}
+	if purpose, ok := fields["purpose"].(string); ok {
+		fields["purpose"] = NormalizeRpcNodePurpose(purpose)
+	}
 	return dao.Mdb.Model(&mdb.RpcNode{}).Where("id = ?", id).Updates(fields).Error
 }
 
@@ -48,13 +160,15 @@ func DeleteRpcNodeByID(id uint64) error {
 // SelectRpcNode picks a healthy RPC endpoint for a (network, type) pair.
 // Strategy: weighted random among rows where enabled=true AND status=ok.
 // Falls back to enabled rows with status=unknown when no health check has
-// run yet. Explicitly down rows are not selected.
+// run yet. Explicitly down rows are not selected. Manual verification nodes
+// are excluded so paid/manual-only RPCs are never used by scanners/listeners.
 func SelectRpcNode(network, nodeType string) (*mdb.RpcNode, error) {
 	var rows []mdb.RpcNode
 	err := dao.Mdb.Model(&mdb.RpcNode{}).
 		Where("network = ?", strings.ToLower(network)).
 		Where("type = ?", strings.ToLower(nodeType)).
 		Where("enabled = ?", true).
+		Where("(purpose IN ? OR purpose = '' OR purpose IS NULL)", []string{mdb.RpcNodePurposeGeneral, mdb.RpcNodePurposeBoth}).
 		Find(&rows).Error
 	if err != nil {
 		return nil, err
@@ -82,6 +196,144 @@ func SelectRpcNode(network, nodeType string) (*mdb.RpcNode, error) {
 	return pickWeighted(candidates), nil
 }
 
+// ListManualPaymentRpcCandidates returns enabled RPC nodes for manual payment
+// verification. Ordinary RPCs are tried first to avoid paid endpoint usage;
+// manual_verify nodes are used only as a fallback.
+func ListManualPaymentRpcCandidates(network, nodeType string) ([]mdb.RpcNode, error) {
+	var rows []mdb.RpcNode
+	err := dao.Mdb.Model(&mdb.RpcNode{}).
+		Where("network = ?", strings.ToLower(strings.TrimSpace(network))).
+		Where("type = ?", strings.ToLower(strings.TrimSpace(nodeType))).
+		Where("enabled = ?", true).
+		Where("(status IN ? OR status = '' OR status IS NULL)", []string{mdb.RpcNodeStatusOk, mdb.RpcNodeStatusUnknown}).
+		Find(&rows).Error
+	if err != nil {
+		return nil, err
+	}
+	if len(rows) == 0 {
+		return nil, nil
+	}
+
+	buckets := make([][]mdb.RpcNode, 4)
+	for _, row := range rows {
+		row.Purpose = NormalizeRpcNodePurpose(row.Purpose)
+		switch row.Purpose {
+		case mdb.RpcNodePurposeGeneral, mdb.RpcNodePurposeBoth:
+			if row.Status == mdb.RpcNodeStatusOk {
+				buckets[0] = append(buckets[0], row)
+			} else {
+				buckets[1] = append(buckets[1], row)
+			}
+		case mdb.RpcNodePurposeManualVerify:
+			if row.Status == mdb.RpcNodeStatusOk {
+				buckets[2] = append(buckets[2], row)
+			} else {
+				buckets[3] = append(buckets[3], row)
+			}
+		}
+	}
+
+	out := make([]mdb.RpcNode, 0, len(rows))
+	for _, bucket := range buckets {
+		sortRpcNodes(bucket)
+		out = append(out, bucket...)
+	}
+	return out, nil
+}
+
+func sortRpcNodes(rows []mdb.RpcNode) {
+	sort.SliceStable(rows, func(i, j int) bool {
+		if rows[i].Weight != rows[j].Weight {
+			return rows[i].Weight > rows[j].Weight
+		}
+		return rows[i].ID < rows[j].ID
+	})
+}
+
+func RecordRpcNodeSuccess(nodeID uint64) {
+	if nodeID == 0 {
+		return
+	}
+	gRpcFailover.Lock()
+	defer gRpcFailover.Unlock()
+	delete(gRpcFailover.failures, nodeID)
+	delete(gRpcFailover.cooldownUntil, nodeID)
+}
+
+func RecordRpcNodeFailure(nodeID uint64) (int, bool) {
+	if nodeID == 0 {
+		return 0, false
+	}
+	now := time.Now()
+	gRpcFailover.Lock()
+	defer gRpcFailover.Unlock()
+	if until, ok := gRpcFailover.cooldownUntil[nodeID]; ok {
+		if now.Before(until) {
+			return gRpcFailover.failures[nodeID], true
+		}
+		delete(gRpcFailover.cooldownUntil, nodeID)
+		delete(gRpcFailover.failures, nodeID)
+	}
+
+	gRpcFailover.failures[nodeID]++
+	failures := gRpcFailover.failures[nodeID]
+	if failures >= RpcFailoverThreshold {
+		gRpcFailover.failures[nodeID] = 0
+		gRpcFailover.cooldownUntil[nodeID] = now.Add(RpcFailoverCooldown)
+		return failures, true
+	}
+	return failures, false
+}
+
+func IsRpcNodeCoolingDown(nodeID uint64) bool {
+	if nodeID == 0 {
+		return false
+	}
+	now := time.Now()
+	gRpcFailover.Lock()
+	defer gRpcFailover.Unlock()
+	until, ok := gRpcFailover.cooldownUntil[nodeID]
+	if !ok {
+		return false
+	}
+	if now.Before(until) {
+		return true
+	}
+	delete(gRpcFailover.cooldownUntil, nodeID)
+	delete(gRpcFailover.failures, nodeID)
+	return false
+}
+
+func RpcNodeLogLabel(node mdb.RpcNode) string {
+	return fmt.Sprintf("id=%d network=%s type=%s endpoint=%s", node.ID, node.Network, node.Type, safeRpcEndpoint(node.Url))
+}
+
+func safeRpcEndpoint(raw string) string {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return ""
+	}
+	parsed, err := url.Parse(raw)
+	if err == nil && parsed.Host != "" {
+		if parsed.Scheme != "" {
+			return parsed.Scheme + "://" + parsed.Host
+		}
+		return parsed.Host
+	}
+	cut := strings.IndexAny(raw, "/?")
+	if cut >= 0 {
+		return raw[:cut]
+	}
+	return raw
+}
+
+func ResetRpcFailoverForTest() {
+	gRpcFailover.Lock()
+	defer gRpcFailover.Unlock()
+	gRpcFailover.failures = make(map[uint64]int)
+	gRpcFailover.cooldownUntil = make(map[uint64]time.Time)
+}
+
 // pickWeighted chooses one row using the Weight column. Weights < 1 are
 // coerced to 1 so an admin-zeroed row still has a chance (use Enabled=false
 // to truly disable).

src/model/data/rpc_node_data_test.go

@@ -1,6 +1,7 @@
 package data
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/GMWalletApp/epusdt/internal/testutil"
@@ -99,3 +100,306 @@ func TestSelectRpcNodeIgnoresDownRows(t *testing.T) {
 		t.Fatalf("SelectRpcNode() = %#v, want nil", got)
 	}
 }
+
+func TestSelectRpcNodeExcludesManualVerifyRows(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	if err := dao.Mdb.Create(&mdb.RpcNode{
+		Network: mdb.NetworkTron,
+		Url:     "https://manual.example.com",
+		Type:    mdb.RpcNodeTypeHttp,
+		Weight:  100,
+		Enabled: true,
+		Purpose: mdb.RpcNodePurposeManualVerify,
+		Status:  mdb.RpcNodeStatusOk,
+	}).Error; err != nil {
+		t.Fatalf("seed manual rpc_node: %v", err)
+	}
+	if err := dao.Mdb.Create(&mdb.RpcNode{
+		Network: mdb.NetworkTron,
+		Url:     "https://general.example.com",
+		Type:    mdb.RpcNodeTypeHttp,
+		Weight:  1,
+		Enabled: true,
+		Purpose: mdb.RpcNodePurposeGeneral,
+		Status:  mdb.RpcNodeStatusUnknown,
+	}).Error; err != nil {
+		t.Fatalf("seed general rpc_node: %v", err)
+	}
+
+	got, err := SelectRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	if err != nil {
+		t.Fatalf("SelectRpcNode(): %v", err)
+	}
+	if got == nil || got.Url != "https://general.example.com" {
+		t.Fatalf("SelectRpcNode() = %#v, want general row", got)
+	}
+}
+
+func TestSelectRpcNodePurposeFilterAppliesToAnyNodeType(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	const nodeType = "grpc"
+	if err := dao.Mdb.Create(&mdb.RpcNode{
+		Network: mdb.NetworkTron,
+		Url:     "grpc://manual.example.com",
+		Type:    nodeType,
+		Weight:  100,
+		Enabled: true,
+		Purpose: mdb.RpcNodePurposeManualVerify,
+		Status:  mdb.RpcNodeStatusOk,
+	}).Error; err != nil {
+		t.Fatalf("seed manual rpc_node: %v", err)
+	}
+	if err := dao.Mdb.Create(&mdb.RpcNode{
+		Network: mdb.NetworkTron,
+		Url:     "grpc://general.example.com",
+		Type:    nodeType,
+		Weight:  1,
+		Enabled: true,
+		Purpose: mdb.RpcNodePurposeGeneral,
+		Status:  mdb.RpcNodeStatusOk,
+	}).Error; err != nil {
+		t.Fatalf("seed general rpc_node: %v", err)
+	}
+
+	got, err := SelectRpcNode(mdb.NetworkTron, nodeType)
+	if err != nil {
+		t.Fatalf("SelectRpcNode(): %v", err)
+	}
+	if got == nil || got.Url != "grpc://general.example.com" {
+		t.Fatalf("SelectRpcNode() = %#v, want general grpc row", got)
+	}
+}
+
+func TestSelectRpcNodeManualVerifyOnlyReturnsNil(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	if err := dao.Mdb.Create(&mdb.RpcNode{
+		Network: mdb.NetworkTron,
+		Url:     "https://manual-only.example.com",
+		Type:    mdb.RpcNodeTypeHttp,
+		Weight:  1,
+		Enabled: true,
+		Purpose: mdb.RpcNodePurposeManualVerify,
+		Status:  mdb.RpcNodeStatusOk,
+	}).Error; err != nil {
+		t.Fatalf("seed manual rpc_node: %v", err)
+	}
+
+	got, err := SelectRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	if err != nil {
+		t.Fatalf("SelectRpcNode(): %v", err)
+	}
+	if got != nil {
+		t.Fatalf("SelectRpcNode() = %#v, want nil", got)
+	}
+}
+
+func TestListManualPaymentRpcCandidatesGeneralBeforeManualVerify(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://manual-ok.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkTron, Url: "https://general-unknown.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkTron, Url: "https://general-ok.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkTron, Url: "https://manual-unknown.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkTron, Url: "https://down.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusDown},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	got, err := ListManualPaymentRpcCandidates(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	if err != nil {
+		t.Fatalf("ListManualPaymentRpcCandidates(): %v", err)
+	}
+	var urls []string
+	for _, row := range got {
+		urls = append(urls, row.Url)
+	}
+	want := []string{
+		"https://general-ok.example.com",
+		"https://general-unknown.example.com",
+		"https://manual-ok.example.com",
+		"https://manual-unknown.example.com",
+	}
+	if len(urls) != len(want) {
+		t.Fatalf("candidate urls = %#v, want %#v", urls, want)
+	}
+	for i := range want {
+		if urls[i] != want[i] {
+			t.Fatalf("candidate urls = %#v, want %#v", urls, want)
+		}
+	}
+}
+
+func TestListManualPaymentRpcCandidatesAllowsManualVerifyFallbackOnly(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://manual-ok.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkTron, Url: "https://manual-down.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusDown},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	got, err := ListManualPaymentRpcCandidates(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	if err != nil {
+		t.Fatalf("ListManualPaymentRpcCandidates(): %v", err)
+	}
+	if len(got) != 1 || got[0].Url != "https://manual-ok.example.com" {
+		t.Fatalf("candidate rows = %#v, want only manual ok fallback", got)
+	}
+}
+
+func TestSelectGeneralRpcNodeSkipsCoolingNode(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+	ResetRpcFailoverForTest()
+	t.Cleanup(ResetRpcFailoverForTest)
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://primary.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkTron, Url: "https://backup.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	first, err := SelectGeneralRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	if err != nil {
+		t.Fatalf("SelectGeneralRpcNode(): %v", err)
+	}
+	if first == nil || first.Url != "https://primary.example.com" {
+		t.Fatalf("first node = %#v, want primary", first)
+	}
+
+	for i := 0; i < RpcFailoverThreshold; i++ {
+		RecordRpcNodeFailure(first.ID)
+	}
+
+	got, err := SelectGeneralRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	if err != nil {
+		t.Fatalf("SelectGeneralRpcNode(): %v", err)
+	}
+	if got == nil || got.Url != "https://backup.example.com" {
+		t.Fatalf("node after cooldown = %#v, want backup", got)
+	}
+}
+
+func TestSelectGeneralRpcNodeFallsBackWhenAllNodesCooling(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+	ResetRpcFailoverForTest()
+	t.Cleanup(ResetRpcFailoverForTest)
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://primary.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkTron, Url: "https://backup.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+	for i := range rows {
+		for n := 0; n < RpcFailoverThreshold; n++ {
+			RecordRpcNodeFailure(rows[i].ID)
+		}
+	}
+
+	got, err := SelectGeneralRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	if err != nil {
+		t.Fatalf("SelectGeneralRpcNode(): %v", err)
+	}
+	if got == nil || got.Url != "https://primary.example.com" {
+		t.Fatalf("SelectGeneralRpcNode() = %#v, want primary when every node is cooling", got)
+	}
+}
+
+func TestSelectGeneralRpcNodeReturnsNilWhenExcludedAlternatesCooling(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+	ResetRpcFailoverForTest()
+	t.Cleanup(ResetRpcFailoverForTest)
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://primary.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkTron, Url: "https://backup.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+	for i := 0; i < RpcFailoverThreshold; i++ {
+		RecordRpcNodeFailure(rows[1].ID)
+	}
+
+	got, err := SelectGeneralRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp, rows[0].ID)
+	if err != nil {
+		t.Fatalf("SelectGeneralRpcNode(): %v", err)
+	}
+	if got != nil {
+		t.Fatalf("SelectGeneralRpcNode() = %#v, want nil when only alternate is cooling", got)
+	}
+}
+
+func TestRecordRpcNodeSuccessClearsCooldown(t *testing.T) {
+	ResetRpcFailoverForTest()
+	t.Cleanup(ResetRpcFailoverForTest)
+
+	const nodeID uint64 = 42
+	for i := 0; i < RpcFailoverThreshold; i++ {
+		RecordRpcNodeFailure(nodeID)
+	}
+	if !IsRpcNodeCoolingDown(nodeID) {
+		t.Fatal("node should be cooling after threshold")
+	}
+	RecordRpcNodeSuccess(nodeID)
+	if IsRpcNodeCoolingDown(nodeID) {
+		t.Fatal("node should not be cooling after success")
+	}
+	failures, cooling := RecordRpcNodeFailure(nodeID)
+	if cooling || failures != 1 {
+		t.Fatalf("failure state after success = failures=%d cooling=%v, want failures=1 cooling=false", failures, cooling)
+	}
+}
+
+func TestRpcNodeLogLabelHidesPathAndQuery(t *testing.T) {
+	label := RpcNodeLogLabel(mdb.RpcNode{
+		BaseModel: mdb.BaseModel{ID: 7},
+		Network:   mdb.NetworkEthereum,
+		Type:      mdb.RpcNodeTypeWs,
+		Url:       "wss://rpc.example.com/v3/secret-key?token=secret",
+	})
+	if strings.Contains(label, "secret") || strings.Contains(label, "/v3/") {
+		t.Fatalf("RpcNodeLogLabel() leaked sensitive URL parts: %s", label)
+	}
+	if !strings.Contains(label, "wss://rpc.example.com") {
+		t.Fatalf("RpcNodeLogLabel() = %s, want host", label)
+	}
+}
+
+func TestListRpcNodesForHealthExcludesManualVerify(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://general.example.com", Type: mdb.RpcNodeTypeHttp, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusUnknown},
+		{Network: mdb.NetworkTron, Url: "https://manual.example.com", Type: mdb.RpcNodeTypeHttp, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusUnknown},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+	got, err := ListRpcNodesForHealth()
+	if err != nil {
+		t.Fatalf("ListRpcNodesForHealth(): %v", err)
+	}
+	if len(got) != 1 || got[0].Url != "https://general.example.com" {
+		t.Fatalf("ListRpcNodesForHealth() = %#v, want only general row", got)
+	}
+}

src/model/mdb/rpc_node.go

@@ -13,19 +13,26 @@ const (
 	RpcNodeStatusDown    = "down"
 )
 
-// RpcNode records one RPC endpoint for a network. Clients select a node
-// by weight among rows where Enabled=true AND Status=ok. A periodic
-// task/rpc_health_job writes Status/LastLatencyMs/LastCheckedAt.
+const (
+	RpcNodePurposeGeneral      = "general"
+	RpcNodePurposeManualVerify = "manual_verify"
+	RpcNodePurposeBoth         = "both"
+)
+
+// RpcNode records one RPC endpoint for a network. Runtime selection filters by
+// Type, Status and Purpose so paid manual-verification nodes stay isolated.
 type RpcNode struct {
-	Network       string      `gorm:"column:network;size:32;index:rpc_nodes_network_status_index,priority:1" json:"network" example:"tron"`
-	Url string `gorm:"column:url;size:512" json:"url" example:"https://api.trongrid.io"`
+	Network string `gorm:"column:network;size:32;index:rpc_nodes_network_status_index,priority:1" json:"network" example:"tron"`
+	Url     string `gorm:"column:url;size:512" json:"url" example:"https://api.trongrid.io"`
 	// 连接类型 http=HTTP请求 ws=WebSocket长连接
-	Type string `gorm:"column:type;size:16" json:"type" enums:"http,ws" example:"http"`
-	Weight        int         `gorm:"column:weight;default:1" json:"weight" example:"1"`
-	ApiKey        string      `gorm:"column:api_key;size:255" json:"api_key" example:"your-api-key"`
-	Enabled bool `gorm:"column:enabled;default:true" json:"enabled" example:"true"`
+	Type    string `gorm:"column:type;size:16" json:"type" enums:"http,ws" example:"http"`
+	Weight  int    `gorm:"column:weight;default:1" json:"weight" example:"1"`
+	ApiKey  string `gorm:"column:api_key;size:255" json:"api_key" example:"your-api-key"`
+	Enabled bool   `gorm:"column:enabled;default:true" json:"enabled" example:"true"`
+	// 用途 general=通用 manual_verify=补单专用 both=通用+补单
+	Purpose string `gorm:"column:purpose;size:32;default:general;index:rpc_nodes_purpose_index" json:"purpose" enums:"general,manual_verify,both" example:"general"`
 	// 健康状态 unknown=未知 ok=正常 down=异常
-	Status string `gorm:"column:status;size:16;default:unknown;index:rpc_nodes_network_status_index,priority:2" json:"status" enums:"unknown,ok,down" example:"ok"`
+	Status        string      `gorm:"column:status;size:16;default:unknown;index:rpc_nodes_network_status_index,priority:2" json:"status" enums:"unknown,ok,down" example:"ok"`
 	LastLatencyMs int         `gorm:"column:last_latency_ms;default:-1" json:"last_latency_ms" example:"120"`
 	LastCheckedAt carbon.Time `gorm:"column:last_checked_at" json:"last_checked_at" example:"2026-04-16 12:00:00"`
 	BaseModel

src/model/response/base.go

@@ -4,8 +4,11 @@ package response
 // Used for swagger documentation only — the actual response is built
 // by util/http.Resp.
 type ApiResponse struct {
-	StatusCode int         `json:"status_code" example:"200"`
-	Message    string      `json:"message" example:"success"`
-	Data       interface{} `json:"data"`
-	RequestID  string      `json:"request_id" example:"req-123456"`
+	// Stable errno used by the frontend for i18n. Success is 200; failures use codes from util/constant.Errno.
+	StatusCode int `json:"status_code" example:"200"`
+	// Default server-side errno text. Frontend should prefer status_code for display translation.
+	Message string      `json:"message" example:"success"`
+	Data    interface{} `json:"data"`
+	// Request id echoed from X-Request-ID when present.
+	RequestID string `json:"request_id" example:"req-123456"`
 }

src/model/service/manual_payment_verify.go

@@ -54,7 +54,9 @@ func SetManualOrderPaymentValidatorForTest(fn func(*mdb.Orders, string) (string,
 	if fn == nil {
 		manualOrderPaymentValidator = validateManualOrderPaymentDefault
 	} else {
-		manualOrderPaymentValidator = fn
+		manualOrderPaymentValidator = func(order *mdb.Orders, blockTransactionID string) (string, error) {
+			return fn(order, blockTransactionID)
+		}
 	}
 	manualOrderPaymentValidatorMu.Unlock()
 	return func() {
@@ -282,25 +284,25 @@ func validateManualEvmPaymentWithClient(ctx context.Context, client evmChainRead
 func dialManualEvmClients(ctx context.Context, network string) ([]manualEvmClient, error) {
 	var clients []manualEvmClient
 	var connectErrors []string
-	for _, nodeType := range []string{mdb.RpcNodeTypeWs, mdb.RpcNodeTypeHttp} {
-		node, err := data.SelectRpcNode(network, nodeType)
-		if err != nil {
-			return nil, err
-		}
-		if node == nil || node.ID == 0 || strings.TrimSpace(node.Url) == "" {
+
+	nodes, err := listManualEvmRpcCandidates(network)
+	if err != nil {
+		return nil, err
+	}
+	for _, node := range nodes {
+		if strings.TrimSpace(node.Url) == "" {
 			continue
 		}
-		rpcURL := strings.TrimSpace(node.Url)
-		client, err := ethclient.DialContext(ctx, rpcURL)
+		client, err := dialManualEvmClient(ctx, node)
 		if err == nil {
 			clients = append(clients, manualEvmClient{
-				label:  fmt.Sprintf("%s %s", nodeType, rpcURL),
+				label:  manualRpcNodeLabel(node),
 				reader: client,
 				close:  client.Close,
 			})
 			continue
 		}
-		connectErrors = append(connectErrors, fmt.Sprintf("%s %s: %v", nodeType, rpcURL, err))
+		connectErrors = append(connectErrors, fmt.Sprintf("%s: %v", manualRpcNodeLabel(node), err))
 	}
 	if len(clients) > 0 {
 		return clients, nil
@@ -311,6 +313,49 @@ func dialManualEvmClients(ctx context.Context, network string) ([]manualEvmClien
 	return nil, fmt.Errorf("no enabled %s WS/HTTP RPC node configured", network)
 }
 
+func listManualEvmRpcCandidates(network string) ([]mdb.RpcNode, error) {
+	buckets := make([][]mdb.RpcNode, 4)
+	for _, nodeType := range []string{mdb.RpcNodeTypeHttp, mdb.RpcNodeTypeWs} {
+		nodes, err := data.ListManualPaymentRpcCandidates(network, nodeType)
+		if err != nil {
+			return nil, err
+		}
+		for _, node := range nodes {
+			node.Purpose = data.NormalizeRpcNodePurpose(node.Purpose)
+			switch node.Purpose {
+			case mdb.RpcNodePurposeGeneral, mdb.RpcNodePurposeBoth:
+				if node.Status == mdb.RpcNodeStatusOk {
+					buckets[0] = append(buckets[0], node)
+				} else {
+					buckets[1] = append(buckets[1], node)
+				}
+			case mdb.RpcNodePurposeManualVerify:
+				if node.Status == mdb.RpcNodeStatusOk {
+					buckets[2] = append(buckets[2], node)
+				} else {
+					buckets[3] = append(buckets[3], node)
+				}
+			}
+		}
+	}
+
+	out := make([]mdb.RpcNode, 0)
+	for _, bucket := range buckets {
+		out = append(out, bucket...)
+	}
+	return out, nil
+}
+
+func dialManualEvmClient(ctx context.Context, node mdb.RpcNode) (*ethclient.Client, error) {
+	rpcURL := strings.TrimSpace(node.Url)
+	return ethclient.DialContext(ctx, rpcURL)
+}
+
+func manualRpcNodeLabel(node mdb.RpcNode) string {
+	purpose := data.NormalizeRpcNodePurpose(node.Purpose)
+	return fmt.Sprintf("%s purpose=%s", data.RpcNodeLogLabel(node), purpose)
+}
+
 func ensureEvmTransactionNotBeforeOrder(blockTime uint64, order *mdb.Orders) error {
 	if order == nil {
 		return fmt.Errorf("order not found")
@@ -398,55 +443,77 @@ func validateManualTronPayment(order *mdb.Orders, txID string) (string, error) {
 		return "", err
 	}
 
-	baseURL, apiKey, err := ResolveTronNode()
+	nodes, err := data.ListManualPaymentRpcCandidates(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
 	if err != nil {
 		return "", err
 	}
-
-	var tx manualTronTransaction
-	if err = tronPostJSON(baseURL, apiKey, "/wallet/gettransactionbyid", map[string]interface{}{"value": normalizedTxID}, &tx); err != nil {
-		return "", fmt.Errorf("fetch tron transaction: %w", err)
-	}
-	if strings.TrimSpace(tx.TxID) == "" {
-		return "", fmt.Errorf("transaction not found")
-	}
-	if strings.TrimSpace(tx.TxID) != "" && !strings.EqualFold(strings.TrimSpace(tx.TxID), normalizedTxID) {
-		return "", fmt.Errorf("transaction id mismatch")
-	}
-	if len(tx.Ret) > 0 && tx.Ret[0].ContractRet != "" && tx.Ret[0].ContractRet != "SUCCESS" {
-		return "", fmt.Errorf("transaction is not successful: %s", tx.Ret[0].ContractRet)
+	if len(nodes) == 0 {
+		return "", fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkTron, mdb.RpcNodeTypeHttp)
 	}
 
-	var info manualTronTxInfo
-	if err = tronPostJSON(baseURL, apiKey, "/wallet/gettransactioninfobyid", map[string]interface{}{"value": normalizedTxID}, &info); err != nil {
-		return "", fmt.Errorf("fetch tron transaction info: %w", err)
-	}
-	if info.BlockNumber <= 0 {
-		return "", fmt.Errorf("transaction is not confirmed")
-	}
-	if info.Receipt.Result != "" && info.Receipt.Result != "SUCCESS" {
-		return "", fmt.Errorf("transaction is not successful: %s", info.Receipt.Result)
-	}
-	if err = ensureTronConfirmations(baseURL, apiKey, order.Network, info.BlockNumber); err != nil {
-		return "", err
-	}
-	if info.BlockTimeStamp <= 0 {
-		return "", fmt.Errorf("transaction block timestamp missing")
-	}
-	if info.BlockTimeStamp < order.CreatedAt.TimestampMilli() {
-		return "", fmt.Errorf("transaction predates the order")
-	}
-
-	if strings.EqualFold(strings.TrimSpace(order.Token), "TRX") {
-		if err = validateManualTronNativeTransfer(order, &tx); err != nil {
-			return "", err
+	var verifyErrors []string
+	for _, node := range nodes {
+		if strings.TrimSpace(node.Url) == "" {
+			continue
+		}
+		if err = validateManualTronPaymentWithNode(order, normalizedTxID, node); err != nil {
+			verifyErrors = append(verifyErrors, fmt.Sprintf("%s: %v", manualRpcNodeLabel(node), err))
+			continue
 		}
 		return normalizedTxID, nil
 	}
-	if err = validateManualTronTRC20Transfer(order, &tx, &info); err != nil {
-		return "", err
+	if len(verifyErrors) > 0 {
+		return "", fmt.Errorf("manual TRON verification failed: %s", strings.Join(verifyErrors, "; "))
 	}
-	return normalizedTxID, nil
+	return "", fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+}
+
+func validateManualTronPaymentWithNode(order *mdb.Orders, normalizedTxID string, node mdb.RpcNode) error {
+	baseURL := strings.TrimSpace(node.Url)
+	var tx manualTronTransaction
+	if err := tronPostJSON(baseURL, node.ApiKey, "/wallet/gettransactionbyid", map[string]interface{}{"value": normalizedTxID}, &tx); err != nil {
+		return fmt.Errorf("fetch tron transaction: %w", err)
+	}
+	if strings.TrimSpace(tx.TxID) == "" {
+		return fmt.Errorf("transaction not found")
+	}
+	if strings.TrimSpace(tx.TxID) != "" && !strings.EqualFold(strings.TrimSpace(tx.TxID), normalizedTxID) {
+		return fmt.Errorf("transaction id mismatch")
+	}
+	if len(tx.Ret) > 0 && tx.Ret[0].ContractRet != "" && tx.Ret[0].ContractRet != "SUCCESS" {
+		return fmt.Errorf("transaction is not successful: %s", tx.Ret[0].ContractRet)
+	}
+
+	var info manualTronTxInfo
+	if err := tronPostJSON(baseURL, node.ApiKey, "/wallet/gettransactioninfobyid", map[string]interface{}{"value": normalizedTxID}, &info); err != nil {
+		return fmt.Errorf("fetch tron transaction info: %w", err)
+	}
+	if info.BlockNumber <= 0 {
+		return fmt.Errorf("transaction is not confirmed")
+	}
+	if info.Receipt.Result != "" && info.Receipt.Result != "SUCCESS" {
+		return fmt.Errorf("transaction is not successful: %s", info.Receipt.Result)
+	}
+	if err := ensureTronConfirmations(baseURL, node.ApiKey, order.Network, info.BlockNumber); err != nil {
+		return err
+	}
+	if info.BlockTimeStamp <= 0 {
+		return fmt.Errorf("transaction block timestamp missing")
+	}
+	if info.BlockTimeStamp < order.CreatedAt.TimestampMilli() {
+		return fmt.Errorf("transaction predates the order")
+	}
+
+	if strings.EqualFold(strings.TrimSpace(order.Token), "TRX") {
+		if err := validateManualTronNativeTransfer(order, &tx); err != nil {
+			return err
+		}
+		return nil
+	}
+	if err := validateManualTronTRC20Transfer(order, &tx, &info); err != nil {
+		return err
+	}
+	return nil
 }
 
 func validateManualTronNativeTransfer(order *mdb.Orders, tx *manualTronTransaction) error {
@@ -571,20 +638,48 @@ func tronPostJSON(baseURL, apiKey, path string, body interface{}, out interface{
 
 func validateManualSolanaPayment(order *mdb.Orders, sig string) (string, error) {
 	sig = strings.TrimSpace(sig)
-	txData, err := SolGetTransaction(sig)
+	nodes, err := data.ListManualPaymentRpcCandidates(mdb.NetworkSolana, mdb.RpcNodeTypeHttp)
 	if err != nil {
-		return "", fmt.Errorf("fetch solana transaction: %w", err)
+		return "", err
+	}
+	if len(nodes) == 0 {
+		return "", fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkSolana, mdb.RpcNodeTypeHttp)
+	}
+
+	var verifyErrors []string
+	for _, node := range nodes {
+		rpcURL := strings.TrimSpace(node.Url)
+		if rpcURL == "" {
+			continue
+		}
+		if err = validateManualSolanaPaymentWithRPC(order, sig, node); err != nil {
+			verifyErrors = append(verifyErrors, fmt.Sprintf("%s: %v", manualRpcNodeLabel(node), err))
+			continue
+		}
+		return sig, nil
+	}
+	if len(verifyErrors) > 0 {
+		return "", fmt.Errorf("manual Solana verification failed: %s", strings.Join(verifyErrors, "; "))
+	}
+	return "", fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkSolana, mdb.RpcNodeTypeHttp)
+}
+
+func validateManualSolanaPaymentWithRPC(order *mdb.Orders, sig string, node mdb.RpcNode) error {
+	rpcURL := strings.TrimSpace(node.Url)
+	txData, err := solGetTransactionWithURL(rpcURL, sig)
+	if err != nil {
+		return fmt.Errorf("fetch solana transaction: %w", err)
 	}
 	if !gjson.GetBytes(txData, "result").Exists() || gjson.GetBytes(txData, "result").Type == gjson.Null {
-		return "", fmt.Errorf("transaction not found")
+		return fmt.Errorf("transaction not found")
 	}
-	if err = ensureSolanaConfirmations(order.Network, sig); err != nil {
-		return "", err
+	if err = ensureSolanaConfirmationsWithRPC(order.Network, sig, rpcURL); err != nil {
+		return err
 	}
 
 	tokens, err := data.ListEnabledChainTokensByNetwork(mdb.NetworkSolana)
 	if err != nil {
-		return "", err
+		return err
 	}
 	mintTokens := make(map[string]*mdb.ChainToken, len(tokens))
 	var nativeSolToken *mdb.ChainToken
@@ -615,17 +710,17 @@ func validateManualSolanaPayment(order *mdb.Orders, sig string) (string, error)
 			continue
 		}
 		if err = ensureSolanaTransferNotBeforeOrder(transferInfo.BlockTime, order); err != nil {
-			return "", err
+			return err
 		}
 		if amountMatchesFloat(order.ActualAmount, amount) {
-			return sig, nil
+			return nil
 		}
 		amountMismatch = true
 	}
 	if amountMismatch {
-		return "", fmt.Errorf("transaction amount mismatch")
+		return fmt.Errorf("transaction amount mismatch")
 	}
-	return "", fmt.Errorf("matching solana transfer to order address not found")
+	return fmt.Errorf("matching solana transfer to order address not found")
 }
 
 func ensureSolanaTransferNotBeforeOrder(blockTime int64, order *mdb.Orders) error {
@@ -642,6 +737,14 @@ func ensureSolanaTransferNotBeforeOrder(blockTime int64, order *mdb.Orders) erro
 }
 
 func ensureSolanaConfirmations(network, sig string) error {
+	rpcURL, err := resolveSolanaRpcURL()
+	if err != nil {
+		return err
+	}
+	return ensureSolanaConfirmationsWithRPC(network, sig, rpcURL)
+}
+
+func ensureSolanaConfirmationsWithRPC(network, sig string, rpcURL string) error {
 	chain, err := data.GetChainByNetwork(network)
 	if err != nil {
 		return err
@@ -654,7 +757,7 @@ func ensureSolanaConfirmations(network, sig string) error {
 		return nil
 	}
 
-	body, err := SolRetryClient("getSignatureStatuses", []interface{}{
+	body, err := solRetryClientWithURL(rpcURL, "getSignatureStatuses", []interface{}{
 		[]string{sig},
 		map[string]interface{}{"searchTransactionHistory": true},
 	})

src/model/service/manual_payment_verify_test.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
+	"sync/atomic"
 	"testing"
 	"time"
 
@@ -117,6 +118,154 @@ func TestManualVerifyDialEvmClientsIncludesHTTPNode(t *testing.T) {
 	}
 }
 
+func TestManualVerifyEvmCandidatesPreferGeneralAcrossNodeTypes(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkEthereum, Type: mdb.RpcNodeTypeHttp, Url: "http://manual.example.com", Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkEthereum, Type: mdb.RpcNodeTypeWs, Url: "ws://general.example.com", Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	got, err := listManualEvmRpcCandidates(mdb.NetworkEthereum)
+	if err != nil {
+		t.Fatalf("listManualEvmRpcCandidates(): %v", err)
+	}
+	urls := make([]string, 0, len(got))
+	for _, node := range got {
+		urls = append(urls, node.Url)
+	}
+	want := []string{"ws://general.example.com", "http://manual.example.com"}
+	if len(urls) != len(want) {
+		t.Fatalf("candidate urls = %#v, want %#v", urls, want)
+	}
+	for i := range want {
+		if urls[i] != want[i] {
+			t.Fatalf("candidate urls = %#v, want %#v", urls, want)
+		}
+	}
+}
+
+func TestManualRpcNodeLabelHidesSensitiveURLParts(t *testing.T) {
+	label := manualRpcNodeLabel(mdb.RpcNode{
+		BaseModel: mdb.BaseModel{ID: 9},
+		Network:   mdb.NetworkEthereum,
+		Type:      mdb.RpcNodeTypeHttp,
+		Url:       "https://rpc.example.com/v3/secret-key?token=secret",
+		Purpose:   mdb.RpcNodePurposeManualVerify,
+	})
+	if strings.Contains(label, "secret") || strings.Contains(label, "/v3/") {
+		t.Fatalf("manualRpcNodeLabel() leaked sensitive URL parts: %s", label)
+	}
+	if !strings.Contains(label, "endpoint=https://rpc.example.com") {
+		t.Fatalf("manualRpcNodeLabel() = %s, want sanitized endpoint", label)
+	}
+	if !strings.Contains(label, "purpose=manual_verify") {
+		t.Fatalf("manualRpcNodeLabel() = %s, want purpose", label)
+	}
+}
+
+func TestManualVerifyDialEvmClientDoesNotForwardUserIPHeader(t *testing.T) {
+	var headerCalls int32
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if got := r.Header.Get("X-USER-IP"); got != "" {
+			t.Errorf("X-USER-IP header = %q, want empty", got)
+			http.Error(w, "unexpected user ip header", http.StatusBadRequest)
+			return
+		}
+		atomic.AddInt32(&headerCalls, 1)
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"error": map[string]interface{}{
+				"code":    -32000,
+				"message": "not found",
+			},
+		})
+	}))
+	defer server.Close()
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	client, err := dialManualEvmClient(ctx, mdb.RpcNode{
+		Network: mdb.NetworkEthereum,
+		Type:    mdb.RpcNodeTypeHttp,
+		Url:     server.URL,
+		Purpose: mdb.RpcNodePurposeManualVerify,
+	})
+	if err != nil {
+		t.Fatalf("dialManualEvmClient(): %v", err)
+	}
+	defer client.Close()
+
+	_, _ = client.TransactionReceipt(ctx, common.HexToHash("0x"+strings.Repeat("a", 64)))
+	if got := atomic.LoadInt32(&headerCalls); got == 0 {
+		t.Fatal("manual verify EVM request did not reach test RPC")
+	}
+}
+
+func TestManualVerifyDialEvmClientDoesNotForwardUserIPForGeneralNode(t *testing.T) {
+	var calls int32
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if got := r.Header.Get("X-USER-IP"); got != "" {
+			t.Errorf("X-USER-IP header = %q, want empty", got)
+			http.Error(w, "unexpected user ip header", http.StatusBadRequest)
+			return
+		}
+		atomic.AddInt32(&calls, 1)
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"error": map[string]interface{}{
+				"code":    -32000,
+				"message": "not found",
+			},
+		})
+	}))
+	defer server.Close()
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	client, err := dialManualEvmClient(ctx, mdb.RpcNode{
+		Network: mdb.NetworkEthereum,
+		Type:    mdb.RpcNodeTypeHttp,
+		Url:     server.URL,
+		Purpose: mdb.RpcNodePurposeGeneral,
+	})
+	if err != nil {
+		t.Fatalf("dialManualEvmClient(): %v", err)
+	}
+	defer client.Close()
+
+	_, _ = client.TransactionReceipt(ctx, common.HexToHash("0x"+strings.Repeat("a", 64)))
+	if got := atomic.LoadInt32(&calls); got == 0 {
+		t.Fatal("general EVM request did not reach test RPC")
+	}
+}
+
+func TestTronPostJSONDoesNotForwardUserIPWithoutHeaders(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if got := r.Header.Get("X-USER-IP"); got != "" {
+			t.Errorf("X-USER-IP header = %q, want empty", got)
+			http.Error(w, "unexpected user ip header", http.StatusBadRequest)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"ok":true}`))
+	}))
+	defer server.Close()
+
+	var out map[string]interface{}
+	if err := tronPostJSON(server.URL, "", "/wallet/getnowblock", map[string]interface{}{}, &out); err != nil {
+		t.Fatalf("tronPostJSON(): %v", err)
+	}
+}
+
 func TestManualVerifyEvmRejectsTransactionBeforeOrder(t *testing.T) {
 	order := &mdb.Orders{BaseModel: mdb.BaseModel{CreatedAt: *carbon.NewTime(carbon.CreateFromTimestampMilli(time.Now().UnixMilli()))}}
 	txTime := uint64(time.Now().Add(-time.Hour).Unix())
@@ -271,7 +420,12 @@ func TestManualVerifyTronPaymentHTTPFlow(t *testing.T) {
 
 	rawAmount := big.NewInt(1230000)
 	blockTimeMs := time.Now().Add(time.Minute).UnixMilli()
+	requestCalls := 0
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if got := r.Header.Get("X-USER-IP"); got != "" {
+			t.Errorf("X-USER-IP header = %q, want empty", got)
+		}
+		requestCalls++
 		var req map[string]string
 		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 			t.Errorf("decode tron request: %v", err)
@@ -333,6 +487,7 @@ func TestManualVerifyTronPaymentHTTPFlow(t *testing.T) {
 		Url:     server.URL,
 		Enabled: true,
 		Status:  mdb.RpcNodeStatusOk,
+		Purpose: mdb.RpcNodePurposeManualVerify,
 	}).Error; err != nil {
 		t.Fatalf("create tron rpc node: %v", err)
 	}
@@ -366,6 +521,9 @@ func TestManualVerifyTronPaymentHTTPFlow(t *testing.T) {
 	if got != txID {
 		t.Fatalf("canonical tx id = %q, want %q", got, txID)
 	}
+	if requestCalls != 3 {
+		t.Fatalf("manual verify request calls = %d, want 3", requestCalls)
+	}
 }
 
 func TestManualVerifySolanaRejectsMissingBlockTime(t *testing.T) {

src/model/service/order_service.go

@@ -60,7 +60,7 @@ func CreateTransaction(req *request.CreateTransactionRequest, apiKey *mdb.ApiKey
 	network := strings.ToLower(strings.TrimSpace(req.Network))
 	notifyURL := strings.TrimSpace(req.NotifyUrl)
 	if err := security.ValidatePublicHTTPURL(notifyURL); err != nil {
-		return nil, err
+		return nil, constant.NotifyURLErr
 	}
 
 	gCreateTransactionLock.Lock()
@@ -351,16 +351,43 @@ func SubmitManualPayment(tradeId, blockTransactionId string) (*response.ManualPa
 	if err != nil {
 		return nil, err
 	}
-	if order.Status != mdb.StatusWaitPay {
-		return nil, constant.OrderNotWaitPay
+	return submitManualPaymentForOrder(order, blockTransactionId)
+}
+
+// SubmitCashierManualPayment is the public cashier variant. It rejects hashes
+// already stored on any order before touching RPC so repeated/public probes do
+// not spend RPC quota. Admin mark-paid intentionally keeps using
+// SubmitManualPayment and the existing verification path.
+func SubmitCashierManualPayment(tradeId, blockTransactionId string) (*response.ManualPaymentResponse, error) {
+	tradeId = strings.TrimSpace(tradeId)
+	blockTransactionId = strings.TrimSpace(blockTransactionId)
+
+	order, err := GetOrderInfoByTradeId(tradeId)
+	if err != nil {
+		return nil, err
 	}
-	if !isOnChainOrder(order.PayProvider) {
-		return nil, errors.New("order is not an on-chain payment order")
+	if err = validateManualPaymentOrder(order); err != nil {
+		return nil, err
+	}
+	if err = ensureManualBlockTransactionUnused(order, blockTransactionId); err != nil {
+		return nil, err
+	}
+	return submitManualPaymentForOrder(order, blockTransactionId)
+}
+
+func submitManualPaymentForOrder(order *mdb.Orders, blockTransactionId string) (*response.ManualPaymentResponse, error) {
+	blockTransactionId = strings.TrimSpace(blockTransactionId)
+	if err := validateManualPaymentOrder(order); err != nil {
+		return nil, err
 	}
 
 	verifiedBlockTransactionID, err := ValidateManualOrderPayment(order, blockTransactionId)
 	if err != nil {
-		return nil, err
+		var rspErr *constant.RspError
+		if errors.As(err, &rspErr) {
+			return nil, err
+		}
+		return nil, constant.ManualPaymentVerifyErr
 	}
 	if err = OrderProcessing(&request.OrderProcessingRequest{
 		ReceiveAddress:     order.ReceiveAddress,
@@ -385,6 +412,16 @@ func SubmitManualPayment(tradeId, blockTransactionId string) (*response.ManualPa
 	}, nil
 }
 
+func validateManualPaymentOrder(order *mdb.Orders) error {
+	if order.Status != mdb.StatusWaitPay {
+		return constant.OrderNotWaitPay
+	}
+	if !isOnChainOrder(order.PayProvider) {
+		return constant.ManualPaymentProviderErr
+	}
+	return nil
+}
+
 func isOnChainOrder(payProvider string) bool {
 	payProvider = strings.TrimSpace(payProvider)
 	return payProvider == "" || payProvider == mdb.PaymentProviderOnChain
@@ -645,7 +682,7 @@ func switchToOkPay(parent *mdb.Orders, token string) (*response.CheckoutCounterR
 	if err != nil {
 		_ = data.MarkProviderOrderFailed(subTradeID, mdb.PaymentProviderOkPay)
 		_ = data.ExpireOrderByTradeID(subTradeID)
-		return nil, err
+		return nil, constant.PaymentProviderCreateErr
 	}
 	if err = data.UpdateProviderOrderCreated(subTradeID, mdb.PaymentProviderOkPay, okpayOrder.ProviderOrderID, okpayOrder.PayURL); err != nil {
 		_ = data.MarkProviderOrderFailed(subTradeID, mdb.PaymentProviderOkPay)

src/model/service/order_service_test.go

@@ -80,8 +80,8 @@ func TestCreateTransactionRejectsPrivateNotifyURL(t *testing.T) {
 	req := newCreateTransactionRequest("order_private_notify_url", 1)
 	req.NotifyUrl = "http://127.0.0.1/notify"
 
-	if _, err := CreateTransaction(req, nil); err == nil {
-		t.Fatal("CreateTransaction returned nil error for private notify_url")
+	if _, err := CreateTransaction(req, nil); err != constant.NotifyURLErr {
+		t.Fatalf("CreateTransaction error = %v, want %v", err, constant.NotifyURLErr)
 	}
 }
 

src/model/service/sol_task.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
+	"net/http"
 	"sort"
 	"strings"
 	"sync"
@@ -28,6 +29,12 @@ var gProcessedSignatures sync.Map // sig -> unix timestamp
 
 var processSolanaOrder = OrderProcessing
 
+var (
+	solRPCRetryCount   = 5
+	solRPCRetryWait    = 2 * time.Second
+	solRPCRetryMaxWait = 10 * time.Second
+)
+
 type TransferInfo struct {
 	Source      string  // Source address (for SOL) or source ATA (for SPL tokens)
 	Destination string  // Destination address (for SOL) or destination ATA (for SPL tokens)
@@ -293,26 +300,74 @@ type solSignatureResult struct {
 }
 
 func resolveSolanaRpcURL() (string, error) {
-	node, err := data.SelectRpcNode(mdb.NetworkSolana, mdb.RpcNodeTypeHttp)
+	node, err := resolveSolanaRpcNode()
 	if err != nil {
 		return "", err
 	}
+	rpcURL := strings.TrimSpace(node.Url)
+	return rpcURL, nil
+}
+
+func resolveSolanaRpcNode(excludeIDs ...uint64) (*mdb.RpcNode, error) {
+	node, err := data.SelectGeneralRpcNode(mdb.NetworkSolana, mdb.RpcNodeTypeHttp, excludeIDs...)
+	if err != nil {
+		return nil, err
+	}
 	if node == nil || node.ID == 0 {
-		return "", fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkSolana, mdb.RpcNodeTypeHttp)
+		return nil, fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkSolana, mdb.RpcNodeTypeHttp)
 	}
 	rpcURL := strings.TrimSpace(node.Url)
 	if rpcURL == "" {
-		return "", fmt.Errorf("rpc_nodes id=%d has empty url", node.ID)
+		return nil, fmt.Errorf("rpc_nodes id=%d has empty url", node.ID)
 	}
-	return rpcURL, nil
+	node.Url = rpcURL
+	return node, nil
 }
 
 // SolRetryClient 发送 Solana JSON-RPC 请求，自动重试
 func SolRetryClient(method string, params []interface{}) ([]byte, error) {
+	tried := make([]uint64, 0, 3)
+	var lastErr error
+	for attempts := 0; attempts < 3; attempts++ {
+		node, err := resolveSolanaRpcNode(tried...)
+		if err != nil {
+			if lastErr != nil {
+				return nil, lastErr
+			}
+			return nil, err
+		}
+		if len(tried) > 0 {
+			log.Sugar.Warnf("[SOL] trying alternate RPC node method=%s node=%s", method, data.RpcNodeLogLabel(*node))
+		}
+
+		body, err := solRetryClientWithURL(node.Url, method, params)
+		if err == nil {
+			data.RecordRpcNodeSuccess(node.ID)
+			return body, nil
+		}
+
+		lastErr = err
+		failures, cooling := data.RecordRpcNodeFailure(node.ID)
+		nodeLabel := data.RpcNodeLogLabel(*node)
+		if !cooling {
+			log.Sugar.Warnf("[SOL] RPC node failed method=%s node=%s failures=%d/%d", method, nodeLabel, failures, data.RpcFailoverThreshold)
+			return nil, err
+		}
+		log.Sugar.Warnf("[SOL] RPC node reached fail threshold method=%s node=%s, trying another node", method, nodeLabel)
+		tried = append(tried, node.ID)
+	}
+	return nil, lastErr
+}
+
+func solRetryClientWithURL(rpcUrl string, method string, params []interface{}) ([]byte, error) {
+	return solRetryClientWithURLHeaders(rpcUrl, method, params, nil)
+}
+
+func solRetryClientWithURLHeaders(rpcUrl string, method string, params []interface{}, headers http.Header) ([]byte, error) {
 	client := resty.New()
-	client.SetRetryCount(5)
-	client.SetRetryWaitTime(2 * time.Second)
-	client.SetRetryMaxWaitTime(10 * time.Second)
+	client.SetRetryCount(solRPCRetryCount)
+	client.SetRetryWaitTime(solRPCRetryWait)
+	client.SetRetryMaxWaitTime(solRPCRetryMaxWait)
 	client.AddRetryCondition(func(r *resty.Response, err error) bool {
 		if err != nil {
 			return true
@@ -323,25 +378,35 @@ func SolRetryClient(method string, params []interface{}) ([]byte, error) {
 		return false
 	})
 
-	rpcUrl, err := resolveSolanaRpcURL()
-	if err != nil {
-		return nil, err
+	req := client.R().SetHeader("Content-Type", "application/json")
+	for key, values := range headers {
+		for _, value := range values {
+			req.SetHeader(key, value)
+		}
 	}
 
-	resp, err := client.R().
-		SetHeader("Content-Type", "application/json").
-		SetBody(map[string]interface{}{
-			"jsonrpc": "2.0",
-			"id":      1,
-			"method":  method,
-			"params":  params,
-		}).
+	resp, err := req.SetBody(map[string]interface{}{
+		"jsonrpc": "2.0",
+		"id":      1,
+		"method":  method,
+		"params":  params,
+	}).
 		Post(rpcUrl)
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode() >= http.StatusBadRequest {
+		return nil, fmt.Errorf("solana rpc HTTP %d", resp.StatusCode())
+	}
 
 	respBody := resp.Body()
+	if errValue := gjson.GetBytes(respBody, "error"); errValue.Exists() && errValue.Type != gjson.Null {
+		code := errValue.Get("code").String()
+		if code == "" {
+			code = "unknown"
+		}
+		return nil, fmt.Errorf("solana rpc error code=%s", code)
+	}
 
 	return respBody, nil
 }
@@ -401,6 +466,33 @@ func SolGetTransaction(sig string) ([]byte, error) {
 	return txData, nil
 }
 
+func solGetTransactionWithURL(rpcURL string, sig string) ([]byte, error) {
+	return solGetTransactionWithURLHeaders(rpcURL, sig, nil)
+}
+
+func solGetTransactionWithURLHeaders(rpcURL string, sig string, headers http.Header) ([]byte, error) {
+	txData, err := solRetryClientWithURLHeaders(rpcURL, "getTransaction", []interface{}{
+		sig,
+		map[string]interface{}{
+			"encoding":                       "jsonParsed",
+			"commitment":                     "confirmed",
+			"maxSupportedTransactionVersion": 0, // suport
+		},
+	}, headers)
+	if err != nil {
+		log.Sugar.Errorf("SolRetryClient failed: %v", err)
+		return nil, err
+	}
+
+	errField := gjson.GetBytes(txData, "result.meta.err")
+	if errField.Exists() && errField.Type != gjson.Null {
+		log.Sugar.Warnf("Transaction failed: %v", errField.String())
+		return nil, fmt.Errorf("transaction failed: %s", errField.String())
+	}
+
+	return txData, nil
+}
+
 // isTransferToAddress 判断转账目标是否为指定钱包地址
 func isTransferToAddress(transfer *TransferInfo, targetAddress string) bool {
 	// Native SOL transfer - check destination directly

src/model/service/sol_task_test.go

@@ -28,6 +28,7 @@ func setupSolanaRPCNode(t *testing.T, url string) func() {
 		Type:    mdb.RpcNodeTypeHttp,
 		Weight:  1,
 		Enabled: true,
+		Purpose: mdb.RpcNodePurposeGeneral,
 		Status:  mdb.RpcNodeStatusOk,
 	}
 	if err := dao.Mdb.Create(node).Error; err != nil {
@@ -59,6 +60,263 @@ func TestResolveSolanaRpcURLWithRow(t *testing.T) {
 	}
 }
 
+func TestResolveSolanaRpcURLIgnoresManualVerifyOnly(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	if err := dao.Mdb.Create(&mdb.RpcNode{
+		Network: mdb.NetworkSolana,
+		Url:     "https://paid-solana.example.com",
+		Type:    mdb.RpcNodeTypeHttp,
+		Weight:  100,
+		Enabled: true,
+		Purpose: mdb.RpcNodePurposeManualVerify,
+		Status:  mdb.RpcNodeStatusOk,
+	}).Error; err != nil {
+		t.Fatalf("seed manual rpc_node: %v", err)
+	}
+
+	if got, err := resolveSolanaRpcURL(); err == nil {
+		t.Fatalf("resolveSolanaRpcURL() = %q, nil; want error", got)
+	}
+}
+
+func TestResolveSolanaRpcURLUsesGeneralWhenManualVerifyExists(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkSolana, Url: "https://paid-solana.example.com", Type: mdb.RpcNodeTypeHttp, Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkSolana, Url: " https://general-solana.example.com ", Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	got, err := resolveSolanaRpcURL()
+	if err != nil {
+		t.Fatalf("resolveSolanaRpcURL(): %v", err)
+	}
+	if got != "https://general-solana.example.com" {
+		t.Fatalf("resolveSolanaRpcURL() = %q, want general node", got)
+	}
+}
+
+func TestSolRetryClientSwitchesAfterFailureThreshold(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+	data.ResetRpcFailoverForTest()
+	t.Cleanup(data.ResetRpcFailoverForTest)
+	oldRetryCount := solRPCRetryCount
+	oldRetryWait := solRPCRetryWait
+	oldRetryMaxWait := solRPCRetryMaxWait
+	solRPCRetryCount = 0
+	solRPCRetryWait = time.Millisecond
+	solRPCRetryMaxWait = time.Millisecond
+	t.Cleanup(func() {
+		solRPCRetryCount = oldRetryCount
+		solRPCRetryWait = oldRetryWait
+		solRPCRetryMaxWait = oldRetryMaxWait
+	})
+
+	var primaryCalls int
+	primary := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		primaryCalls++
+		http.Error(w, "temporary", http.StatusBadGateway)
+	}))
+	defer primary.Close()
+
+	var backupCalls int
+	backup := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		backupCalls++
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"result":  "ok",
+		})
+	}))
+	defer backup.Close()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkSolana, Url: primary.URL, Type: mdb.RpcNodeTypeHttp, Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkSolana, Url: backup.URL, Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	for i := 0; i < data.RpcFailoverThreshold-1; i++ {
+		if _, err := SolRetryClient("getHealth", nil); err == nil {
+			t.Fatalf("SolRetryClient attempt %d unexpectedly succeeded", i+1)
+		}
+	}
+	if backupCalls != 0 {
+		t.Fatalf("backup calls before threshold = %d, want 0", backupCalls)
+	}
+
+	body, err := SolRetryClient("getHealth", nil)
+	if err != nil {
+		t.Fatalf("SolRetryClient after threshold: %v", err)
+	}
+	if gjson.GetBytes(body, "result").String() != "ok" {
+		t.Fatalf("response body = %s, want result ok", string(body))
+	}
+	if backupCalls == 0 {
+		t.Fatal("backup RPC was not called after threshold")
+	}
+	if primaryCalls == 0 {
+		t.Fatal("primary RPC was not called")
+	}
+}
+
+func TestSolRetryClientCountsJSONRPCErrorAsNodeFailure(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+	data.ResetRpcFailoverForTest()
+	t.Cleanup(data.ResetRpcFailoverForTest)
+	oldRetryCount := solRPCRetryCount
+	oldRetryWait := solRPCRetryWait
+	oldRetryMaxWait := solRPCRetryMaxWait
+	solRPCRetryCount = 0
+	solRPCRetryWait = time.Millisecond
+	solRPCRetryMaxWait = time.Millisecond
+	t.Cleanup(func() {
+		solRPCRetryCount = oldRetryCount
+		solRPCRetryWait = oldRetryWait
+		solRPCRetryMaxWait = oldRetryMaxWait
+	})
+
+	var primaryCalls int
+	primary := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		primaryCalls++
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"error": map[string]interface{}{
+				"code": -32005,
+			},
+		})
+	}))
+	defer primary.Close()
+
+	var backupCalls int
+	backup := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		backupCalls++
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"result":  "ok",
+		})
+	}))
+	defer backup.Close()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkSolana, Url: primary.URL, Type: mdb.RpcNodeTypeHttp, Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkSolana, Url: backup.URL, Type: mdb.RpcNodeTypeHttp, Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	for i := 0; i < data.RpcFailoverThreshold-1; i++ {
+		if _, err := SolRetryClient("getHealth", nil); err == nil {
+			t.Fatalf("SolRetryClient attempt %d unexpectedly succeeded", i+1)
+		}
+	}
+	body, err := SolRetryClient("getHealth", nil)
+	if err != nil {
+		t.Fatalf("SolRetryClient after JSON-RPC error threshold: %v", err)
+	}
+	if gjson.GetBytes(body, "result").String() != "ok" {
+		t.Fatalf("response body = %s, want result ok", string(body))
+	}
+	if primaryCalls < data.RpcFailoverThreshold {
+		t.Fatalf("primary calls = %d, want at least threshold", primaryCalls)
+	}
+	if backupCalls == 0 {
+		t.Fatal("backup RPC was not called after JSON-RPC error threshold")
+	}
+}
+
+func TestSolRetryClientWithURLHeadersForwardsCustomHeaders(t *testing.T) {
+	oldRetryCount := solRPCRetryCount
+	oldRetryWait := solRPCRetryWait
+	oldRetryMaxWait := solRPCRetryMaxWait
+	solRPCRetryCount = 0
+	solRPCRetryWait = time.Millisecond
+	solRPCRetryMaxWait = time.Millisecond
+	t.Cleanup(func() {
+		solRPCRetryCount = oldRetryCount
+		solRPCRetryWait = oldRetryWait
+		solRPCRetryMaxWait = oldRetryMaxWait
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if got := r.Header.Get("X-Test-Header"); got != "test-value" {
+			t.Errorf("X-Test-Header = %q, want test-value", got)
+			http.Error(w, "bad custom header", http.StatusBadRequest)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"result":  "ok",
+		})
+	}))
+	defer server.Close()
+
+	headers := http.Header{}
+	headers.Set("X-Test-Header", "test-value")
+	body, err := solRetryClientWithURLHeaders(server.URL, "getHealth", nil, headers)
+	if err != nil {
+		t.Fatalf("solRetryClientWithURLHeaders(): %v", err)
+	}
+	if gjson.GetBytes(body, "result").String() != "ok" {
+		t.Fatalf("response body = %s, want result ok", string(body))
+	}
+}
+
+func TestSolRetryClientWithURLDoesNotForwardUserIPByDefault(t *testing.T) {
+	oldRetryCount := solRPCRetryCount
+	oldRetryWait := solRPCRetryWait
+	oldRetryMaxWait := solRPCRetryMaxWait
+	solRPCRetryCount = 0
+	solRPCRetryWait = time.Millisecond
+	solRPCRetryMaxWait = time.Millisecond
+	t.Cleanup(func() {
+		solRPCRetryCount = oldRetryCount
+		solRPCRetryWait = oldRetryWait
+		solRPCRetryMaxWait = oldRetryMaxWait
+	})
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if got := r.Header.Get("X-USER-IP"); got != "" {
+			t.Errorf("X-USER-IP header = %q, want empty", got)
+			http.Error(w, "unexpected user ip header", http.StatusBadRequest)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"result":  "ok",
+		})
+	}))
+	defer server.Close()
+
+	body, err := solRetryClientWithURL(server.URL, "getHealth", nil)
+	if err != nil {
+		t.Fatalf("solRetryClientWithURL(): %v", err)
+	}
+	if gjson.GetBytes(body, "result").String() != "ok" {
+		t.Fatalf("response body = %s, want result ok", string(body))
+	}
+}
+
 func TestSolCallBackDoesNotCacheSignatureAfterRetryableOrderProcessingError(t *testing.T) {
 	cleanup := testutil.SetupTestDatabases(t)
 	defer cleanup()

src/model/service/task_service.go

@@ -18,18 +18,28 @@ import (
 )
 
 func resolveTronNode() (string, string, error) {
-	node, err := data.SelectRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+	node, err := ResolveTronRpcNode()
 	if err != nil {
 		return "", "", err
 	}
+	rpcURL := strings.TrimRight(strings.TrimSpace(node.Url), "/")
+	return rpcURL, node.ApiKey, nil
+}
+
+func ResolveTronRpcNode(excludeIDs ...uint64) (*mdb.RpcNode, error) {
+	node, err := data.SelectGeneralRpcNode(mdb.NetworkTron, mdb.RpcNodeTypeHttp, excludeIDs...)
+	if err != nil {
+		return nil, err
+	}
 	if node == nil || node.ID == 0 {
-		return "", "", fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkTron, mdb.RpcNodeTypeHttp)
+		return nil, fmt.Errorf("no enabled %s %s RPC node configured in rpc_nodes", mdb.NetworkTron, mdb.RpcNodeTypeHttp)
 	}
 	rpcURL := strings.TrimRight(strings.TrimSpace(node.Url), "/")
 	if rpcURL == "" {
-		return "", "", fmt.Errorf("rpc_nodes id=%d has empty url", node.ID)
+		return nil, fmt.Errorf("rpc_nodes id=%d has empty url", node.ID)
 	}
-	return rpcURL, node.ApiKey, nil
+	node.Url = rpcURL
+	return node, nil
 }
 
 func ResolveTronNode() (string, string, error) {

src/model/service/task_tron_test.go

@@ -51,6 +51,49 @@ func TestResolveTronNode_WithRow(t *testing.T) {
 	}
 }
 
+func TestResolveTronNodeIgnoresManualVerifyOnly(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	if err := dao.Mdb.Create(&mdb.RpcNode{
+		Network: mdb.NetworkTron,
+		Url:     "https://paid-tron.example.com",
+		Type:    mdb.RpcNodeTypeHttp,
+		ApiKey:  "paid-key",
+		Weight:  100,
+		Enabled: true,
+		Purpose: mdb.RpcNodePurposeManualVerify,
+		Status:  mdb.RpcNodeStatusOk,
+	}).Error; err != nil {
+		t.Fatalf("seed manual rpc_node: %v", err)
+	}
+
+	if gotURL, gotKey, err := resolveTronNode(); err == nil {
+		t.Fatalf("resolveTronNode() = (%q, %q, nil), want error", gotURL, gotKey)
+	}
+}
+
+func TestResolveTronNodeUsesGeneralWhenManualVerifyExists(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	rows := []mdb.RpcNode{
+		{Network: mdb.NetworkTron, Url: "https://paid-tron.example.com", Type: mdb.RpcNodeTypeHttp, ApiKey: "paid-key", Weight: 100, Enabled: true, Purpose: mdb.RpcNodePurposeManualVerify, Status: mdb.RpcNodeStatusOk},
+		{Network: mdb.NetworkTron, Url: "https://general-tron.example.com", Type: mdb.RpcNodeTypeHttp, ApiKey: "general-key", Weight: 1, Enabled: true, Purpose: mdb.RpcNodePurposeGeneral, Status: mdb.RpcNodeStatusOk},
+	}
+	if err := dao.Mdb.Create(&rows).Error; err != nil {
+		t.Fatalf("seed rpc_nodes: %v", err)
+	}
+
+	gotURL, gotKey, err := resolveTronNode()
+	if err != nil {
+		t.Fatalf("resolveTronNode(): %v", err)
+	}
+	if gotURL != "https://general-tron.example.com" || gotKey != "general-key" {
+		t.Fatalf("resolveTronNode() = (%q, %q), want general node", gotURL, gotKey)
+	}
+}
+
 // TestResolveTronNode_DisabledRow verifies that a disabled row is ignored.
 func TestResolveTronNode_DisabledRow(t *testing.T) {
 	cleanup := testutil.SetupTestDatabases(t)