Add L402 payment middleware for transparent 402 handling#17
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joelklabo wants to merge 1 commit intosulusolutions:mainfrom
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Add L402 payment middleware for transparent 402 handling#17joelklabo wants to merge 1 commit intosulusolutions:mainfrom
joelklabo wants to merge 1 commit intosulusolutions:mainfrom
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Implements HTTP middleware that wraps http.Handler to transparently handle L402 payment challenges. Two entry points: 1. L402() middleware: wraps any handler, intercepts requests with X-Target-URL header, proxies them through the L402 client 2. ReverseProxy(): pre-configured reverse proxy using httputil that routes all requests through L402 payment handling Features: - Automatic 402 detection and Lightning invoice payment via wallet - Token caching via configurable Store for paid endpoint reuse - Hop-by-hop header filtering for proper HTTP proxy behavior - Modular design: middleware is separate from client internals Tests: 11 test cases covering pass-through, proxy with/without 402, payment failure, invalid URLs, header forwarding, token reuse, reverse proxy modes, and hop-by-hop header filtering. Closes sulusolutions#10 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Implements HTTP middleware for transparent L402 payment challenge handling, as requested in #10.
Two middleware entry points:
L402()middleware — wraps anyhttp.Handler, intercepts requests withX-Target-URLheader, and proxies them through the L402 client which handles 402 challenges automaticallyReverseProxy()— pre-configuredhttputil.ReverseProxythat routes all requests through L402 payment handling with a customRoundTripperFeatures
wallet.Wallettokenstore.Storefor reuse across requests to paid endpointsclient.ClientinternalsTests
11 test cases covering:
All existing tests continue to pass. Tested with
-raceflag.Bounty
This PR addresses the 44,000 sat bounty from #10.
Test plan
go test ./middleware/— 11 tests passinggo test -race ./middleware/— no racesgo test ./...— all existing tests still pass🤖 Generated with Claude Code