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- Create components/negentropy_lib/ wrapping negentropy submodule
- CMakeLists.txt references submodule sources via relative path
- OpenSSL SHA-256 compat using mbedTLS for ESP32
- Enables C++ exceptions + RTTI for negentropy_wrapper.cpp
- Remove esp_littlefs, esp_timer from REQUIRES (transitive via wisp_relay)
- Keep tcp_transport (direct dep of stratum_client.c via esp_transport.h)
- Fix config.c duplicate seed_relays/sync_interval/fallback_interval blocks
- Remove leftover merge conflict marker in tollgate_api.c
- Add MINER_INTEGRATION_PLAN.md with miner integration checklist
idf.py build: PASS (1.3MB, 68% free)
make test-unit: PASS (19 suites, 344+ assertions)
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New modules:
- mining_payment.c/h: hashprice calc (nbits->difficulty->sat/GH/s/day),
share validation, client stats, allotment conversion (ms + bytes)
- stratum_client.c/h: SV1 upstream pool connection (subscribe/authorize/submit)
- stratum_proxy.c/h: Local SV1 TCP server for downstream miners, job broadcast
- sw_miner.c/h: Software SHA256d miner (ESP32 CPU fallback)
- asic_miner.c/h: ASIC detection stub (BM1366/BM1368 SPI)
Config:
- config.h/c: mining_payout_mode_t enum (auto/pool/upstream/proxy_only),
stratum pool settings, mining port, hashprice override, sandbox mint access
- Defaults fill nostr_seed_relays (8/8) and nostr_relays (4/4) with fast relays
Integration into existing modules:
- session.h/c: payment_method_t enum (CASHU/MINING/BYTES)
- firewall.h/c: firewall_set_mining_port(), firewall_set_sandbox_mint_access()
- tollgate_api.c: GET /mining/job, POST /mining/share, GET /mining/stats
- tollgate_client.h/c: TG_CLIENT_MINING state, mining discovery tag parsing
- tollgate_main.c: mining init in start_services(), stratum_client_tick() in loop
- captive_portal.c: tabbed Cashu/Mine UI with live hashrate polling
Unit tests (69 new assertions across 4 suites):
- test_mining_payment (23 tests): nbits->difficulty, hashprice, client stats, allotment
- test_stratum_proxy (21 tests): job set/get, stats, type validation
- test_session_payment_method (12 tests): PAYMENT_METHOD enum, bytes/cashu methods
- test_tollgate_client_mining (20 tests): mining tag parsing, discovery struct
- test_firewall_sandbox (16 tests): client grant/revoke, max clients, setters
Enhanced test stubs:
- BaseType_t/pdPASS in freertos/task.h
- lwip: sockets.h, etharp.h, prot/ip.h, prot/ip4.h, prot/tcp.h, netif.h
- dns_server.h, esp_wifi_ap_get_sta_list.h
Build fixes:
- cvm_server.c: replace esp_timer_get_time() with xTaskGetTickCount(),
fix process_relay_message() 3-arg call to 2-arg, add WS keepalive ping
- stratum_proxy.c: widen task_name buffer 16->20
- sw_miner.c: add missing #include esp_random.h
- nucula_src: save_proofs() moved to public in wallet.hpp
Nostr relay updates:
- nostr_seed_relays: +relay.anzenkodo.workers.dev, +nostr.koning-degraaf.nl,
+knostr.neutrine.com, +nostr.einundzwanzig.space (8/8 slots)
- nostr_relays: +relay.anzenkodo.workers.dev, +nostr.koning-degraaf.nl (4/4 slots)
Squash-merge of feature/mining-payment (5 commits: c75230e..9d98ba1)
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Squash merge of feature/multi-mint-support (21 commits):
Multi-mint wallet:
- Accept payments from 4 mints: minibits, coinos, 21mint, lnvoltz
- Periodic health probing (300s interval, 3 recovery threshold)
- Multi-wallet init with nucula_wallet_init_multi()
- /mints and /wallet API endpoints
WPA auto-detect:
- wifi_auth_mode config field (default WPA2, supports WPA3)
- Runtime mapping to wifi_auth_mode_t in STA config
Display gating:
- display_enabled config field (default true)
- Guards display_init/display_update per-board
Bug fixes:
- 3s delay before service start prevents lwip mem_free assertion
- Real npub in discovery (identity_get()->npub_hex)
- Health probe interval 300s (production value)
- Duplicate services_start_task call removed
- UTF-8 arrow replaced with ASCII in log message
Tests: 61+14 unit tests passing, firmware builds clean
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Price discovery allows TollGate ESP32 boards to advertise their per-step
price via WiFi Vendor-Specific Information Elements (OUI 0xC0FFEE) in
beacon and probe response frames. Nearby boards passively scan and build
a market view of competing TollGates without requiring internet access.
Features:
- beacon_price.c/h: 26-byte packed Vendor IE payload (price, step, metric,
mint_hash, geohash, npub_hash), injected via esp_wifi_set_vendor_ie()
- market.c/h: Passive WiFi scan receiver, vendor IE callback parsing,
BSSID-correlated market entries, effective price ranking
- GET /market API endpoint: JSON market snapshot with discovered entries
- AP-only services: beacon + market + API start on WIFI_EVENT_AP_START,
independent of STA connectivity
- STA reconnect fix: 2s delay between retries creates scan windows;
s_sta_connecting guard prevents double-connect
- write-config-ap-only-a/b Makefile targets for STA-less testing
- market_tick() in main loop, client price comparison logging
Hardware verified: both boards discover each other via Vendor IE beacons.
Board A sees TollGate-C0E9CA (RSSI=-30), Board B sees TollGate-B96D80
(RSSI=-25). test-market.mjs: 9/9, test-price-discovery.mjs: 7/7 per board.
Unit tests: 45 new assertions across test_beacon_price (28) and test_market
(17). All 15 test suites pass. ESP-IDF build clean for ESP32-S3.
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- Add lwip_tollgate_hooks.h defining LWIP_HOOK_IP4_CANFORWARD macro
- Inject hook into lwIP build via CMakeLists.txt ESP_IDF_LWIP_HOOK_FILENAME
- Filter forwarded packets by source IP against firewall allowed list
- Only filter packets from AP subnet (10.192.45.0/24), allow all others
- Fix byte order bug: use network byte order for firewall_is_client_allowed
- NAT always enabled, removed global NAT toggle functions
- Remove spent-secret tracking from session.c (mint is authority)
- Remove unused get_ap_netif() function
- Reduce API server stack from 32KB to 16KB (fixes ESP_ERR_HTTPD_TASK)
- Add esp_random.h stub for unit tests
- All 186 unit tests passing
- Verified on hardware: block->pay->allow->revoke->block E2E works
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- session_create_bytes() + session_add_bytes() for bytes-metric sessions
- session_is_expired() dispatches on config metric (bytes vs milliseconds)
- cashu_calculate_allotment() unified dispatcher for both metrics
- tollgate_api discovery/usage/session_event use configured metric
- config: metric field defaults to 'bytes', step_size_bytes=22020096 (21MB)
- 14 new unit tests (148 total passing)
- ASSERT_EQ_UINT64 macro added to test framework
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- Add identity.c/h: HMAC-SHA512 derivation from nsec → npub, STA/AP MAC, SSID, AP IP
- Add nostr_event.c/h: NIP-01 event serialization + Schnorr signing (BIP-340)
- Add geohash.c/h: lat/lon to geohash encoding
- Add wifistr.c/h: kind 38787 event builder + WebSocket publish to Nostr relays
- Update config.c/h: nsec-based identity, Nostr relay/geo config, remove static SSID/IP
- Replace custom mbedTLS wallet with nucula library (libsecp256k1)
- Remove wallet.c/h, wallet_persist.c/h (replaced by nucula_lib component)
- Verified on Board A: derived SSID, captive portal, payment, wallet, wifistr publish
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+ PSRAM
- wallet.c/h: secp256k1 ECP primitives (hash_to_curve, scalar_mul, point_add)
- wallet_persist.c/h: SPIFFS persistence with threshold-based write protection
- Fee accounting for swap (input_fee_ppk from /v1/keysets)
- Keyset fetch via /v1/keysets (586 bytes vs 21KB for /v1/keys)
- Wallet API: GET /wallet, POST /wallet/swap, POST /wallet/send
- Payment proofs auto-stored to wallet + persisted on SPIFFS
- PSRAM enabled for large allocations (ESP32-S3 has 8MB)
- Wallet init deferred to dedicated task (avoids sys_evt stack overflow)
- Cashu proof ID buffer size fixed (66 hex chars, not 16)
- HTTP client: added fetch_headers() call for proper response handling
- persist_threshold_sats config parameter (default: 1 sat)
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- Add DoT reject server on port 853 (TCP RST forces DNS-over-TLS fallback)
- DNS hijack returns NXDOMAIN for all non-A query types (no forwarding for unauthed)
- Shorter TTL on hijack responses (10s) for faster captive detection
- Explicit 302 redirect handlers for /generate_204, /hotspot-detect.html, etc.
- HTTP and DNS request logging for debugging captive detection
- Per-MAC tracking in firewall (find_by_mac, get_mac_for_ip with ARP fallback)
- Session MAC tracking (session_find_by_mac)
- Phase 2 test 18: add route through TollGate before ping test
- All 17 Phase 2 tests pass (15-21 + whoami + portal form)
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response)
- cashu.c: dynamic json_buf sizing (was 2048 stack, now heap based on token length)
- cashu.c: strip trailing newline/CR from token input (cashu CLI appends 'Balance: 0 sat')
- cashu.c: esp_crt_bundle_attach for HTTPS to mint API
- cashu.c: esp_http_client_open/write/fetch_headers/read pattern for HTTPS POST
- cashu.c: remove debug b64url_decode logging
- tollgate_api.c: loop httpd_req_recv for full body (was single call, missed TCP segments)
- tollgate_api.c: stack_size=32768 for TLS in httpd handler
- config.c: fix default mint URL from nofee.testnut to testnut.cashu.space
- CMakeLists.txt: add esp-tls dependency for cert bundle
- CHECKLIST.md: updated with infrastructure status and TDD plan
Known issue: device reboots after checkstate returns 966 bytes with status=200.
Crash likely in post-response processing (JSON parse or session create).
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- tollgate_api.c: increase httpd stack_size to 16384 (was default 4096)
- cashu.c: heap-allocate b64, json_buf, post_body, resp_buf instead of stack
- cashu.c: proper free() on all error paths
- Makefile: replace Go-based tokens target with nutshell wallet targets
- Makefile: add wallet-setup, wallet-info, wallet-balance, mint-token, send-token
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- Add cashu.c/h: Cashu token decode (cashuA/base64url), proof state check via mint API, allotment calculator
- Add session.c/h: time-based session management with allotment/expiry, spent secret tracking
- Add tollgate_api.c/h: HTTP server on :2121 with GET / (kind=10021 discovery), POST / (payment processing), /usage, /whoami
- Update captive portal HTML: replace Grant Free Access with Cashu token paste form + Pay & Connect button
- Update tollgate_main.c: wire in session manager, TollGate API, 1s session tick loop
- Add tests/phase2.mjs: Phase 2 test suite (discovery, invalid token, wrong mint, valid payment)
- Update CHECKLIST.md: reflect Phase 1 complete, Phase 2 in progress with known bugs
Known issues (not yet flashed):
- Stack overflow crash in httpd POST handler (need stack_size=16384 + heap allocations)
- cashu_decode_token uses 2KB stack buffer (needs heap alloc)
- Mint URL should be testnut.cashu.space (nofee.testnut has API compat issues)
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