extra logging

api/gateway/chain/internal/service/gateway/commands/wallet/onchain_balance.go

@@ -3,7 +3,6 @@ package wallet
 import (
 	"context"
 	"math/big"
-	"net/url"
 	"strings"
 	"time"
 
@@ -30,7 +29,6 @@ func onChainWalletBalance(ctx context.Context, deps Deps, wallet *model.ManagedW
 		zap.String("token_symbol", strings.ToUpper(strings.TrimSpace(wallet.TokenSymbol))),
 		zap.String("contract", strings.ToLower(strings.TrimSpace(wallet.ContractAddress))),
 		zap.String("wallet_address", strings.ToLower(strings.TrimSpace(wallet.DepositAddress))),
-		zap.String("rpc_endpoint", safeRPCLabel(rpcURL)),
 	}
 
 	if rpcURL == "" {
@@ -154,14 +152,3 @@ const erc20ABIJSON = `
 		"type": "function"
 	}
 ]`
-
-func safeRPCLabel(raw string) string {
-	parsed, err := url.Parse(strings.TrimSpace(raw))
-	if err != nil || parsed.Host == "" {
-		return ""
-	}
-	parsed.User = nil
-	parsed.RawQuery = ""
-	parsed.Fragment = ""
-	return parsed.String()
-}

api/gateway/chain/internal/service/gateway/rpcclient/clients.go

@@ -0,0 +1,170 @@
+package rpcclient
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/tech/sendico/gateway/chain/internal/service/gateway/shared"
+	"github.com/tech/sendico/pkg/merrors"
+	"github.com/tech/sendico/pkg/mlogger"
+	"go.uber.org/zap"
+)
+
+// Clients holds pre-initialised RPC clients keyed by network name.
+type Clients struct {
+	logger  mlogger.Logger
+	clients map[string]*ethclient.Client
+}
+
+// Prepare dials all configured networks up front and returns a ready-to-use client set.
+func Prepare(ctx context.Context, logger mlogger.Logger, networks []shared.Network) (*Clients, error) {
+	if logger == nil {
+		return nil, merrors.Internal("rpc clients: logger is required")
+	}
+	clientLogger := logger.Named("rpc_client")
+	result := &Clients{
+		logger:  clientLogger,
+		clients: make(map[string]*ethclient.Client),
+	}
+
+	for _, network := range networks {
+		name := strings.ToLower(strings.TrimSpace(network.Name))
+		rpcURL := strings.TrimSpace(network.RPCURL)
+		if name == "" {
+			clientLogger.Warn("skipping network with empty name during rpc client preparation")
+			continue
+		}
+		if rpcURL == "" {
+			result.Close()
+			err := merrors.InvalidArgument(fmt.Sprintf("rpc url not configured for network %s", name))
+			clientLogger.Warn("rpc url missing", zap.String("network", name))
+			return nil, err
+		}
+
+		fields := []zap.Field{
+			zap.String("network", name),
+		}
+		clientLogger.Info("initialising rpc client", fields...)
+
+		dialCtx, cancel := context.WithTimeout(ctx, 15*time.Second)
+		httpClient := &http.Client{
+			Transport: &loggingRoundTripper{
+				logger:  clientLogger,
+				network: name,
+				base:    http.DefaultTransport,
+			},
+		}
+		rpcCli, err := rpc.DialOptions(dialCtx, rpcURL, rpc.WithHTTPClient(httpClient))
+		cancel()
+		if err != nil {
+			result.Close()
+			clientLogger.Warn("failed to dial rpc endpoint", append(fields, zap.Error(err))...)
+			return nil, merrors.Internal(fmt.Sprintf("rpc dial failed for %s: %s", name, err.Error()))
+		}
+		client := ethclient.NewClient(rpcCli)
+
+		result.clients[name] = client
+		clientLogger.Info("rpc client ready", fields...)
+	}
+
+	if len(result.clients) == 0 {
+		return nil, merrors.InvalidArgument("no rpc clients initialised")
+	}
+
+	return result, nil
+}
+
+// Client returns a prepared client for the given network name.
+func (c *Clients) Client(network string) (*ethclient.Client, error) {
+	if c == nil {
+		return nil, merrors.Internal("rpc clients not initialised")
+	}
+	name := strings.ToLower(strings.TrimSpace(network))
+	client, ok := c.clients[name]
+	if !ok {
+		return nil, merrors.InvalidArgument(fmt.Sprintf("rpc client not configured for network %s", name))
+	}
+	return client, nil
+}
+
+// Close tears down all RPC clients, logging each close.
+func (c *Clients) Close() {
+	if c == nil {
+		return
+	}
+	for name, client := range c.clients {
+		client.Close()
+		if c.logger != nil {
+			c.logger.Info("rpc client closed", zap.String("network", name))
+		}
+	}
+}
+
+type loggingRoundTripper struct {
+	logger   mlogger.Logger
+	network  string
+	endpoint string
+	base     http.RoundTripper
+}
+
+func (l *loggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if l.base == nil {
+		l.base = http.DefaultTransport
+	}
+
+	var reqBody []byte
+	if req.Body != nil {
+		raw, _ := io.ReadAll(req.Body)
+		reqBody = raw
+		req.Body = io.NopCloser(strings.NewReader(string(raw)))
+	}
+
+	fields := []zap.Field{
+		zap.String("network", l.network),
+		zap.String("rpc_endpoint", l.endpoint),
+	}
+	if len(reqBody) > 0 {
+		fields = append(fields, zap.String("rpc_request", truncate(string(reqBody), 2048)))
+	}
+	l.logger.Debug("rpc request", fields...)
+
+	resp, err := l.base.RoundTrip(req)
+	if err != nil {
+		l.logger.Warn("rpc http request failed", append(fields, zap.Error(err))...)
+		return nil, err
+	}
+
+	bodyBytes, _ := io.ReadAll(resp.Body)
+	resp.Body.Close()
+	resp.Body = io.NopCloser(strings.NewReader(string(bodyBytes)))
+
+	respFields := append(fields,
+		zap.Int("status_code", resp.StatusCode),
+	)
+	if len(bodyBytes) > 0 {
+		respFields = append(respFields, zap.String("rpc_response", truncate(string(bodyBytes), 2048)))
+	}
+	if resp.StatusCode >= 400 {
+		l.logger.Warn("rpc response error", respFields...)
+	} else {
+		l.logger.Debug("rpc response", respFields...)
+	}
+
+	return resp, nil
+}
+
+func truncate(s string, max int) string {
+	if len(s) <= max {
+		return s
+	}
+	if max <= 3 {
+		return s[:max]
+	}
+	return s[:max-3] + "..."
+}

api/pkg/api/routers/gsresponse/response.go

@@ -47,12 +47,7 @@ func Error[T any](logger mlogger.Logger, service mservice.Type, code codes.Code,
 		if err != nil {
 			fields = append(fields, zap.Error(err))
 		}
-		logFn := logger.Warn
+		logger.Warn("gRPC request failed", fields...)
-		switch code {
-		case codes.Internal, codes.DataLoss, codes.Unavailable:
-			logFn = logger.Error
-		}
-		logFn("gRPC request failed", fields...)
 
 		msg := message(err)
 		switch {