rpcserver: add GetRequest, remove convenience wrappers#64
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- Add GetRequest(ctx) to access the full HTTP request from handlers - Export FlashbotsOriginHeader constant for callers to use - Remove GetHeader, GetOrigin, WithOrigin convenience wrappers - Remove ExtractOriginFromHeader option (moved to app layer) This follows idiomatic Go patterns - provide raw request access, let callers use standard req.Header.Get() for header access. Co-Authored-By: Claude <noreply@anthropic.com>
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Allows downstream repos to use the constant instead of string literals. Follow-up to #64. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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## Summary - Restores `GetOrigin`, `WithOrigin`, and `ExtractOriginFromHeader` removed in #64 - Allows existing code to continue using `GetOrigin(ctx)` pattern ## Why PR #64 removed these in favor of `GetRequest(ctx)`, but downstream repos still use the old pattern. This unblocks those repos without requiring migration. ## Test plan - [x] `go build ./...` - [x] `go test ./rpcserver/...` 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
This PR does two things:
1. Refactor: Idiomatic header access pattern
GetRequest(ctx)to access the full HTTP request from handlersFlashbotsOriginHeaderconstantGetHeader,GetOrigin,WithOrigin)ExtractOriginFromHeaderoptionWhy? The old pattern required modifying go-utils every time we wanted to extract a new header. Want User-Agent? Add
GetUserAgent(). Want another header? Add another function. This is inconvenient and creates unnecessary coupling.The new pattern exposes the request directly - callers use standard
req.Header.Get()to access any header without touching go-utils.2. Feature: User-Agent header support
FlashbotsUserAgentHeaderconstant (X-Flashbots-User-Agent)Why combined? The refactor enables the feature - with
GetRequest(ctx), we can add User-Agent support without adding yet another wrapper function.Related PRs
These PRs depend on this one and should be reviewed together:
Migration
Breaking changes
GetOrigin(),GetHeader(),WithOrigin()removedExtractOriginFromHeaderoption removedImpact: Searched all flashbots repos on GitHub - only protect-rpc, protect-of-api, and mev-share-node-pareto actively use these (all have PRs ready). mev-share-node also references them but is inactive (last push: Jan 2025).
Test plan