fix: refactor grpc_p2p_client to resolve multiple main() conflict #57
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WalkthroughThis PR reorganizes the grpc_p2p_client into a modular layout: it removes the previous monolithic clients (grpc_p2p_client/p2p_client.go and p2p_client_multi_streams_subscribe.go), adds a new shared package (grpc_p2p_client/shared/{types.go,utils.go}) that centralizes message/command types and utilities, and introduces three CLI binaries under grpc_p2p_client/cmd/ (single, multi-publish, multi-subscribe). The Makefile and CI were updated to build multiple binaries. Documentation version strings were bumped from rc13 to rc16 and a docs code path for trace handling was adjusted. Sequence Diagram(s)sequenceDiagram
autonumber
participant CLI as cmd/single
participant gRPC as gRPC Server
participant Shared as shared package
participant File as File Output
CLI->>CLI: parse flags, validate
CLI->>gRPC: open connection & ListenCommands
alt subscribe
CLI->>gRPC: Send SubscribeToTopic
gRPC->>CLI: stream Response
CLI->>Shared: HandleResponse(resp)
Shared-->>File: optional data/trace via WriteToFile
else publish
CLI->>CLI: generate payload(s)
loop per message
CLI->>gRPC: Send PublishData
CLI->>CLI: log latency
end
end
CLI->>CLI: on signal -> cancel -> close
sequenceDiagram
autonumber
participant Main as cmd/multi-subscribe
participant Shared as shared package
participant Worker as per-IP worker
participant gRPC as gRPC Server
participant Data as Data Channel
participant Trace as Trace Channel
participant File as File I/O
Main->>Shared: ReadIPsFromFile(ipFile)
Shared-->>Main: []IPs
Main->>Main: slice IPs, start workers
par per IP
Main->>Worker: start goroutine
Worker->>gRPC: connect & ListenCommands
Worker->>gRPC: Send SubscribeToTopic
gRPC->>Worker: stream Response
Worker->>Shared: HandleResponseWithTracking(ip, resp, ...)
Shared-->>Data: enqueue data (optional)
Shared-->>Trace: enqueue trace (optional)
end
par file writers
File->>Data: drain -> write file
File->>Trace: drain -> write file
end
Main->>Main: on cancel -> stop workers -> wait -> exit
sequenceDiagram
autonumber
participant Client as cmd/multi-publish
participant Shared as shared package
participant IPs as IP file
participant gRPC as gRPC Server
participant Output as Output writer
Client->>Shared: ReadIPsFromFile(ipFile)
Shared-->>Client: []IPs
loop per IP (concurrent)
Client->>gRPC: connect & ListenCommands
Client->>Client: prepare payload(s)
Client->>gRPC: Send PublishData
Client->>Shared: send hashes/records to WriteToFile (via channel)
end
Client->>Client: on signal -> cancel -> wait -> exit
Estimated code review effort🎯 4 (Complex) | ⏱️ ~50 minutes
Possibly related PRs
Suggested reviewers
Pre-merge checks and finishing touches❌ Failed checks (5 warnings)
✅ Passed checks (3 passed)
✨ Finishing touches🧪 Generate unit tests (beta)
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⚠️ Outside diff range comments (4)
docs/guide.md (1)
13-14:⚠️ Documentation and build configuration both reference removed binary—refactor incomplete.The PR moved
p2p_client.gotogrpc_p2p_client/cmd/single/main.goto resolve a multiplemain()conflict. However, both the Makefile and documentation still reference the removed file.Issues:
Makefile broken: Build target tries to compile non-existent
./p2p_client.go# Line in Makefile - will fail: @cd $(P2P_CLIENT_DIR) && go build -o p2p-client ./p2p_client.goShould be:
@cd $(P2P_CLIENT_DIR) && go build -o p2p-client ./cmd/singleDocumentation outdated: All 15 references to
./grpc_p2p_client/p2p-client(lines 13–14, 220, 223, 226, 229, 905, 913, 965, 973, 996, 999, 1011, 1112, 1297) assume the old unified binary path.The refactored code supports the documented
-modeflag (subscribe/publish), so buildingcmd/single/main.gopreserves the expected interface. Update both Makefile and docs to reference the new build location.grpc_p2p_client/cmd/multi-publish/main.go (3)
77-84: Discarded error return fromsendMessages.The goroutine ignores the
errorreturned bysendMessages. At minimum, log errors so failures are visible.for _, ip := range ips { wg.Add(1) go func(ip string) { defer wg.Done() datasize := *dataSize - sendMessages(ctx, ip, datasize, *output != "", dataCh) + if err := sendMessages(ctx, ip, datasize, *output != "", dataCh); err != nil { + log.Printf("[%s] sendMessages failed: %v", ip, err) + } }(ip) }
101-118:log.Fatalfinside loop kills entire process on transient errors; connection-per-message is inefficient.
- Using
log.Fatalf(lines 109, 117) inside a loop within a goroutine will terminate the entire program on any single node failure. Return errors instead.- Creating a new gRPC connection per message is expensive. Move connection establishment outside the loop and reuse.
func sendMessages(ctx context.Context, ip string, datasize int, write bool, dataCh chan<- string) error { + conn, err := grpc.NewClient(ip, + grpc.WithTransportCredentials(insecure.NewCredentials()), + grpc.WithDefaultCallOptions( + grpc.MaxCallRecvMsgSize(math.MaxInt), + grpc.MaxCallSendMsgSize(math.MaxInt), + ), + ) + if err != nil { + return fmt.Errorf("[%s] failed to connect: %w", ip, err) + } + defer conn.Close() + + client := protobuf.NewCommandStreamClient(conn) + stream, err := client.ListenCommands(ctx) + if err != nil { + return fmt.Errorf("[%s] ListenCommands: %w", ip, err) + } + log.Printf("Connected to node at: %s…", ip) + for i := 0; i < *count; i++ { select { case <-ctx.Done(): log.Printf("[%s] context canceled, stopping", ip) return ctx.Err() default: } - - conn, err := grpc.NewClient(ip, - grpc.WithTransportCredentials(insecure.NewCredentials()), - grpc.WithDefaultCallOptions( - grpc.MaxCallRecvMsgSize(math.MaxInt), - grpc.MaxCallSendMsgSize(math.MaxInt), - ), - ) - if err != nil { - log.Fatalf("failed to connect to node %v", err) - } - println(fmt.Sprintf("Connected to node at: %s…", ip)) - - client := protobuf.NewCommandStreamClient(conn) - stream, err := client.ListenCommands(ctx) - - if err != nil { - log.Fatalf("ListenCommands: %v", err) - } // ... rest of publish logic - conn.Close() } return nil }
44-51: Missing validation for empty IP file.If
*ipfileis empty or the file contains no valid IPs,ipswill be an empty slice and no work happens silently. Consider validating._ips, err := shared.ReadIPsFromFile(*ipfile) if err != nil { fmt.Printf("Error: %v\n", err) return } + if len(_ips) == 0 { + log.Fatalf("no IPs found in %s", *ipfile) + }
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docs/guide.md(3 hunks)grpc_p2p_client/cmd/multi-publish/main.go(5 hunks)grpc_p2p_client/cmd/multi-subscribe/main.go(1 hunks)grpc_p2p_client/cmd/single/main.go(1 hunks)grpc_p2p_client/p2p_client.go(0 hunks)grpc_p2p_client/p2p_client_multi_streams_subscribe.go(0 hunks)grpc_p2p_client/shared/types.go(1 hunks)grpc_p2p_client/shared/utils.go(1 hunks)
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- grpc_p2p_client/p2p_client.go
- grpc_p2p_client/p2p_client_multi_streams_subscribe.go
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**/*
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- Do NOT post separate comments for each occurrence.
- Post a single primary comment on the first occurrence.
- In that comment, include a short list of “Also at: file:line” references
for the other locations (e.g. 'Also at: foo.go:42, bar.go:17').
Prioritize signal over volume: one strong comment that references multiple
locations is preferred over many near-identical comments.
Files:
docs/guide.mdgrpc_p2p_client/shared/types.gogrpc_p2p_client/cmd/multi-subscribe/main.gogrpc_p2p_client/cmd/multi-publish/main.gogrpc_p2p_client/cmd/single/main.gogrpc_p2p_client/shared/utils.go
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Review Go code for: idiomatic patterns, error handling (check all errors), concurrency safety (context propagation, goroutine cleanup), test coverage for changed logic, exported API stability, memory efficiency (avoid unnecessary allocations), and prefer standard library over third-party when reasonable.
Files:
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🧬 Code graph analysis (2)
grpc_p2p_client/cmd/multi-publish/main.go (2)
grpc_p2p_client/shared/utils.go (2)
ReadIPsFromFile(24-47)WriteToFile(213-244)grpc_p2p_client/shared/types.go (2)
Command(12-12)CommandPublishData(16-16)
grpc_p2p_client/shared/utils.go (1)
grpc_p2p_client/shared/types.go (1)
P2PMessage(4-9)
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🔇 Additional comments (5)
grpc_p2p_client/shared/types.go (2)
3-9: Add JSON struct tags for reliable unmarshalling.
P2PMessageis unmarshalled from JSON inHandleResponseandHandleResponseWithTracking(seeshared/utils.golines 60, 86). Without explicit JSON tags, field mapping depends on exact casing match. If the incoming JSON uses different casing (e.g.,messageId,source_node_id), unmarshalling will silently fail to populate fields.type P2PMessage struct { - MessageID string - Topic string - Message []byte - SourceNodeID string + MessageID string `json:"messageId,omitempty"` + Topic string `json:"topic,omitempty"` + Message []byte `json:"message,omitempty"` + SourceNodeID string `json:"sourceNodeId,omitempty"` }Verify the expected JSON field names from the protobuf/sidecar response and adjust tags accordingly.
11-19: LGTM — Clean enum definition.The
Commandtype withiotaconstants is idiomatic Go. The explicitCommandUnknown = iotaas zero value is a good defensive default.grpc_p2p_client/cmd/single/main.go (1)
34-79: Overall structure is sound.The single-node CLI design with subscribe/publish modes, signal handling, and stream management is clean. The use of shared utilities is appropriate.
grpc_p2p_client/shared/utils.go (2)
24-47:ReadIPsFromFileis well-implemented.Proper error wrapping, comment/empty-line filtering, and scanner error checking. Clean idiomatic Go.
49-54:HeadHexis correct and concise.
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⚠️ Outside diff range comments (3)
Makefile (1)
137-137: Update clean target to remove all three P2P client binaries.The
cleantarget only removes$(P2P_CLIENT)but three binaries are now created. Thep2p-multi-publishandp2p-multi-subscribebinaries will persist aftermake clean.Apply this diff to clean all binaries:
clean: ## Clean build artifacts @echo "Cleaning build artifacts..." - @rm -f $(P2P_CLIENT) $(PROXY_CLIENT) $(KEYGEN_BINARY) + @rm -f $(P2P_CLIENT_DIR)/p2p-client $(P2P_CLIENT_DIR)/p2p-multi-publish $(P2P_CLIENT_DIR)/p2p-multi-subscribe $(PROXY_CLIENT) $(KEYGEN_BINARY) @echo "Clean complete!"Alternatively, if you adopt Option 1 from the previous comment, define variables and reference them:
clean: ## Clean build artifacts @echo "Cleaning build artifacts..." @rm -f $(P2P_SINGLE) $(P2P_MULTI_PUBLISH) $(P2P_MULTI_SUBSCRIBE) $(PROXY_CLIENT) $(KEYGEN_BINARY) @echo "Clean complete!"docs/guide.md (2)
187-230: Add documentation explaining the three new binary modes and their use cases.The refactoring introduces three separate binaries under
cmd/(single, multi-publish, multi-subscribe), but the "Build and Development Commands" and "Direct Binary Usage" sections don't explain:
- When to use each mode: Single-node vs. multi-node scenarios
- How they differ operationally: Are they mutually exclusive or complementary?
- How the Makefile abstracts binary selection: Users may not realize which binary is invoked by
make subscribevs.make publishAdd a new subsection under "Build and Development Commands" to clarify:
- Which binary mode each Makefile target uses
- When to invoke binaries directly vs. using Makefile targets
- Example scenarios for each mode
1158-1195: Documentation code snippets are completely inaccurate and do not match the actual implementation ingrpc_p2p_client/shared/utils.go.The documented functions have critical differences from the actual implementation:
Function names: Documentation shows lowercase
handleGossipSubTraceandhandleOptimumP2PTrace, but actual functions are capitalized (HandleGossipSubTrace,HandleOptimumP2PTrace) following Go export conventions.Function signatures:
- Documented:
func handleGossipSubTrace(data []byte)- Actual:
func HandleGossipSubTrace(data []byte, writeTrace bool, traceCh chan<- string)Implementation logic is fundamentally different:
- Actual code extracts structured fields (peerID, recvID, msgID, topic, timestamp) using base58 encoding
- Actual code outputs tab-separated formatted strings to channels or printf
- Documented code shows fictional JSON marshaling that doesn't exist in actual implementation
- Documented code shows switch statements on shard types (NEW_SHARD, DUPLICATE_SHARD) that don't exist in actual code
Error handling: Actual implementation calls
HeadHex(data, 64)in error messages; documented version doesn't.Replace the code snippets with accurate implementations that match the actual
shared/utils.gofile.
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**/*
⚙️ CodeRabbit configuration file
**/*: When you find the same underlying issue in multiple locations (same pattern, same fix):
- Do NOT post separate comments for each occurrence.
- Post a single primary comment on the first occurrence.
- In that comment, include a short list of “Also at: file:line” references
for the other locations (e.g. 'Also at: foo.go:42, bar.go:17').
Prioritize signal over volume: one strong comment that references multiple
locations is preferred over many near-identical comments.
Files:
readme.mddocs/guide.mdMakefile
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🔇 Additional comments (5)
readme.md (1)
133-139: Documentation structure is accurate and well-organized.The updated repository structure documentation clearly reflects the new cmd/ subdirectory layout with proper hierarchy and descriptions. Examples throughout the document correctly reference the binary paths and command-line flags.
.github/workflows/ci.yml (2)
35-41: CI build configuration correctly handles three separate binaries.The updated build step properly sequences compilation of all three P2P clients with appropriate directory navigation and success confirmation. Workflow permissions are correctly scoped and action versions are current.
15-21: Permissions configuration is appropriate and well-documented.Each permission is justified by inline comments explaining why it's needed (read for analysis, write for annotations). This aligns with security best practice of least privilege.
docs/guide.md (2)
271-272: Version updates applied consistently across documentation.The rc13 → rc16 version bump is reflected uniformly in the .env example, Proxy API responses, and Node API responses. ✓
Also applies to: 575-575, 1084-1084
13-14: I'll help you verify this review comment about binary path inconsistencies. Let me start by exploring the repository structure and build configuration to understand the actual state of binary paths.
<function_calls>
#!/bin/bashExplore repository structure to understand binary organization
echo "=== Checking for cmd/ directory structure ==="
find . -type d -name "cmd" -o -name "grpc_p2p_client" 2>/dev/null | head -20echo -e "\n=== Listing root-level directories ==="
ls -la | grep "^d" | head -20echo -e "\n=== Looking for Makefile or build files ==="
find . -maxdepth 2 -type f ( -name "Makefile" -o -name "*.mk" -o -name "go.mod" ) 2>/dev/null
</function_calls><function_calls>
#!/bin/bashCheck if cmd/ directory exists with subdirectories
echo "=== Checking cmd/ structure ==="
if [ -d "cmd" ]; then
find cmd -type d | head -20
echo -e "\n=== Files in cmd/ ==="
find cmd -type f -name "*.go" -o -name "main.go" | head -20
fiecho -e "\n=== Checking grpc_p2p_client/ ==="
if [ -d "grpc_p2p_client" ]; then
ls -la grpc_p2p_client/
fi
</function_calls><function_calls>
#!/bin/bashGet repository structure overview
echo "=== Top-level repository structure ==="
ls -laecho -e "\n=== Check docs/guide.md existence and size ==="
if [ -f "docs/guide.md" ]; then
wc -l docs/guide.md
echo -e "\n=== Lines 13-14 from docs/guide.md ==="
sed -n '13,14p' docs/guide.md
fi
</function_calls><function_calls>
#!/bin/bashSearch for all occurrences of grpc_p2p_client in documentation
echo "=== Searching for grpc_p2p_client references in docs/guide.md ==="
if [ -f "docs/guide.md" ]; then
rg -n "grpc_p2p_client" docs/guide.md
fiecho -e "\n=== Checking all binary path patterns in guide.md ==="
if [ -f "docs/guide.md" ]; then
rg -n "./.*p2p-client" docs/guide.md | head -30
fi
</function_calls><function_calls>
#!/bin/bashCheck for build configuration and binary output
echo "=== Looking for Makefile content ==="
if [ -f "Makefile" ]; then
cat Makefile | head -100
fiecho -e "\n=== Looking for build.sh or similar ==="
find . -maxdepth 2 -type f -name "build" 2>/dev/null
</function_calls><function_calls>
#!/bin/bashCheck git info and PR-related files
echo "=== Git log summary (last 5 commits) ==="
git log --oneline -5 2>/dev/null || echo "Git not available"echo -e "\n=== Checking current branch ==="
git branch 2>/dev/null || echo "Git not available"echo -e "\n=== Looking for any recent changes to cmd/ or grpc_p2p_client ==="
git diff --name-status HEAD~1 2>/dev/null | grep -E "(cmd/|grpc_p2p_client)" || echo "No git diff available"
</function_calls>
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Actionable comments posted: 5
♻️ Duplicate comments (8)
grpc_p2p_client/cmd/multi-subscribe/main.go (3)
68-82: Nested goroutine wrappers are unnecessary — remove them.The outer
go func()does nothing but launch an inner goroutine. This creates pointless indirection and potential confusion. Just launchshared.WriteToFiledirectly.if *outputData != "" { dataDone = make(chan bool) - go func() { - header := "receiver\tsender\tsize\tsha256(msg)" - go shared.WriteToFile(ctx, dataCh, dataDone, *outputData, header) - }() + header := "receiver\tsender\tsize\tsha256(msg)" + go shared.WriteToFile(ctx, dataCh, dataDone, *outputData, header) } if *outputTrace != "" { traceDone = make(chan bool) - go func() { - header := "" - go shared.WriteToFile(ctx, traceCh, traceDone, *outputTrace, header) - }() + go shared.WriteToFile(ctx, traceCh, traceDone, *outputTrace, "") }
84-90: Discarding the error fromreceiveMessageshides failures.If a node fails to connect or stream, you'll have no visibility. Log the error.
for _, ip := range ips { wg.Add(1) go func(ip string) { defer wg.Done() - receiveMessages(ctx, ip, *outputData != "", dataCh, *outputTrace != "", traceCh) + if err := receiveMessages(ctx, ip, *outputData != "", dataCh, *outputTrace != "", traceCh); err != nil { + log.Printf("[%s] receiveMessages failed: %v", ip, err) + } }(ip) }
176-179: Unbounded goroutine spawning per message is a resource risk.Under high message volume, this can exhaust memory and degrade performance.
HandleResponseWithTrackingprimarily formats data and sends to a buffered channel — process inline.case resp, ok := <-msgChan: if !ok { log.Printf("Stream closed. Total messages received: %d", atomic.LoadInt32(&receivedCount)) return nil } - go func(resp *protobuf.Response) { - shared.HandleResponseWithTracking(ip, resp, &receivedCount, writeData, dataCh, writeTrace, traceCh) - }(resp) + shared.HandleResponseWithTracking(ip, resp, &receivedCount, writeData, dataCh, writeTrace, traceCh)grpc_p2p_client/cmd/single/main.go (2)
120-123: Unbounded goroutine spawning per message — process inline instead.Same issue as multi-subscribe.
HandleResponseis lightweight; spawning a goroutine per message adds overhead without benefit.case resp, ok := <-msgChan: if !ok { log.Printf("Stream closed. Total messages received: %d", atomic.LoadInt32(&receivedCount)) return } - go func(resp *protobuf.Response) { - shared.HandleResponse(resp, &receivedCount) - }(resp) + shared.HandleResponse(resp, &receivedCount)
130-132: Empty message validation has an edge case whencount > 1.The condition
msg == "" && count == 1allows empty messages when publishing multiple times. If multi-message mode intentionally generates random data (lines 143-150), add a clarifying comment. Otherwise, fix the logic.- if msg == "" && count == 1 { + // When count > 1, random payloads are generated, so msg is optional + if msg == "" && count == 1 { log.Fatalf("−msg is required in publish mode") }grpc_p2p_client/shared/utils.go (3)
212-216:log.Fatalterminates the entire process on file creation failure.This is a shared utility called from goroutines. A single file creation error shouldn't crash the whole program. Return an error instead.
-func WriteToFile(ctx context.Context, dataCh <-chan string, done chan<- bool, filename string, header string) { +func WriteToFile(ctx context.Context, dataCh <-chan string, done chan<- bool, filename string, header string) error { file, err := os.Create(filename) if err != nil { - log.Fatal(err) + log.Printf("failed to create file %s: %v", filename, err) + done <- false + return err } defer file.Close()Callers would need to be updated to handle the return value, but this prevents catastrophic failure.
229-240: Context cancellation returns without signaling thedonechannel — callers block forever.When
ctx.Done()fires, the function returns at line 232 without sending todone. The caller at line 96-99 (multi-subscribe) will block indefinitely on<-dataDone.for data := range dataCh { select { case <-ctx.Done(): + done <- true - return + return ctx.Err() default: } _, err := writer.WriteString(data + "\n") - writer.Flush() if err != nil { log.Printf("Write error: %v", err) } }
235-236: Per-writeFlush()defeats the purpose of buffered I/O.Flushing after every single line is inefficient. Rely on the deferred flush at function exit, or flush periodically (e.g., every N writes or on a timer).
_, err := writer.WriteString(data + "\n") - writer.Flush() if err != nil {
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grpc_p2p_client/cmd/multi-subscribe/main.go(1 hunks)grpc_p2p_client/cmd/single/main.go(1 hunks)grpc_p2p_client/shared/utils.go(1 hunks)
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**/*
⚙️ CodeRabbit configuration file
**/*: When you find the same underlying issue in multiple locations (same pattern, same fix):
- Do NOT post separate comments for each occurrence.
- Post a single primary comment on the first occurrence.
- In that comment, include a short list of “Also at: file:line” references
for the other locations (e.g. 'Also at: foo.go:42, bar.go:17').
Prioritize signal over volume: one strong comment that references multiple
locations is preferred over many near-identical comments.
Files:
grpc_p2p_client/cmd/multi-subscribe/main.gogrpc_p2p_client/cmd/single/main.gogrpc_p2p_client/shared/utils.go
**/*.go
⚙️ CodeRabbit configuration file
Review Go code for: idiomatic patterns, error handling (check all errors), concurrency safety (context propagation, goroutine cleanup), test coverage for changed logic, exported API stability, memory efficiency (avoid unnecessary allocations), and prefer standard library over third-party when reasonable.
Files:
grpc_p2p_client/cmd/multi-subscribe/main.gogrpc_p2p_client/cmd/single/main.gogrpc_p2p_client/shared/utils.go
🧬 Code graph analysis (1)
grpc_p2p_client/shared/utils.go (1)
grpc_p2p_client/shared/types.go (1)
P2PMessage(4-9)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: Test Docker Setup
🔇 Additional comments (4)
grpc_p2p_client/cmd/single/main.go (2)
62-68:os.Exit(0)is missing, but that's correct — previous issue was already addressed.The signal handler now only calls
cancel()withoutos.Exit(0), allowing deferred cleanup to run properly.
144-150: Error fromrand.Readuseslog.Fatalfwhich is fine here, but check the return value properly.
rand.Readfromcrypto/randreturns(n int, err error). The code correctly checkserr, but doesn't verify thatn == 4. In practice,crypto/rand.Readwill either fill the buffer or error, so this is acceptable.grpc_p2p_client/shared/utils.go (2)
25-48:ReadIPsFromFileis well-implemented.Proper error handling, comment filtering, and scanner error checking. Clean implementation.
57-77:HandleResponsenow correctly usestime.Now().UnixNano()— past issue resolved.The previous concern about an uninitialized
timeNowvariable has been addressed.
Restructured into cmd/ subdirectories with separate binaries:
Extracted shared code into shared/ package:
Summary by CodeRabbit
Documentation
New Features
Refactor
Chores
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