Directories
	fonts

Files
	addr_check.h
	Structural address checks for the config portal.
	assets.h
	What each selectable asset IS — one row per pos_chain_t.
	boot.cpp
	Bring-up: NVS, panel, reader, wallet, addresses, setup wizard, Wi-Fi and clock — everything before the main loop.
	card_io.cpp
	The card on the reader: is it usable, open a channel, sign, read the payout addresses off it.
	card_status.h
	What a tapped card is missing, read from its SELECT response.
	chain_icons.c
	chain_icons.h
	civil_time.cpp
	TZ-independent calendar arithmetic and date-string parsing.
	civil_time.h
	TZ-independent calendar arithmetic and date-string parsing.
	config_defaults.h
	config.h, plus a default for every key added after the first config.h files shipped — so an older config.h still builds.
	eth_addr.cpp
	Implementation of the hex Ethereum-address parser, with EIP-55 checksum verification (HARDENING.md §7.1).
	eth_addr.h
	Hex Ethereum-address parsing — a pure, dependency-free unit so it can be unit-tested and fuzzed on the host (see fuzz/fuzz_parse_address.cpp).
	eth_json.cpp
	Implementation of the JSON-RPC response parsing helpers.
	eth_json.h
	JSON-RPC response parsing helpers — kept in their own unit (cJSON + CW_Utils only, no ESP-IDF networking) so they can be fuzzed on the host (see fuzz/fuzz_eth_rpc_json.cpp).
	eth_rlp.cpp
	RLP encoder implementation for EIP-1559 (type 2) transactions.
	eth_rlp.h
	Minimal RLP encoder for EIP-1559 (type 2) Ethereum transactions.
	eth_rpc.cpp
	Ethereum JSON-RPC client implementation (HTTPS). Network bring-up (Wi-Fi, SNTP) lives in net.cpp.
	eth_rpc.h
	Ethereum JSON-RPC client over HTTPS (nonce / ecrecover parity / raw-tx broadcast / receipt polling). Network bring-up (Wi-Fi, SNTP) lives in net.h.
	eth_sig.cpp
	secp256k1 verification + recovery bit, on mbedTLS's ECP module.
	eth_sig.h
	The recovery bit of a secp256k1 signature, computed on the device.
	form_parse.h
	application/x-www-form-urlencoded field extraction.
	hardening.cpp
	Anomaly handling (§3.3): local fail-closed + persisted counter and a RAM ring buffer for on-site inspection. Never bricks.
	hardening.h
	Decision-integrity primitives (see docs/HARDENING.md §3, §4).
	https_post.cpp
	HTTPS JSON POST with the authenticated-Date clock cross-check.
	https_post.h
	One HTTPS JSON POST, shared by every RPC client in the firmware.
	json_out.h
	Escaping for values the config portal puts inside a JSON string.
	keccak256.cpp
	Original (pre-NIST) Keccak-256 implementation, 0x01 padding.
	keccak256.h
	Original Keccak-256 digest as used by Ethereum.
	logo_mid.c
	logo_mid.h
	main.cpp
	cryptnox-pos entry point: touchscreen USDC payment terminal.
	money.h
	The sale's arithmetic: keypad cents, base units, wei, fees, calldata.
	net.cpp
	Wi-Fi station bring-up (init/scan/connect/RSSI) and SNTP time sync.
	net.h
	Network bring-up: Wi-Fi station (init/scan/connect/RSSI) and SNTP time sync. No application-protocol logic lives here — the Ethereum JSON-RPC client is in eth_rpc.h.
	ota.cpp
	Firmware slot handling. See ota.h for the why.
	ota.h
	Firmware slot handling: receive an image into the idle slot, verify it, and install it only once somebody accepts it on the panel.
	ota_version.h
	Dotted version comparison, for deciding whether an update goes forwards or backwards.
	pay.cpp
	What a sale is paid with and to, and the sale between broadcast and verdict.
	pay_evm.cpp
	Ethereum and Polygon: endpoint, fees, pre-flight balance, sign and broadcast an EIP-1559 transfer.
	pay_tron.cpp
	Tron: pre-flight balance, sign and broadcast a TRX or TRC-20 transfer.
	portal_fonts.h
	portal_page.h
	The config portal's document — the HTML/CSS half and the script half.
	pos_app.h
	Private to the application files (main, boot, card_io, pay, pay_evm, pay_tron): the state they share and the calls between them.
	provision.cpp
	The config portal: a SoftAP and a captive portal, for setup and for administration alike, one page for both. See provision.h for the why.
	provision.h
	The config portal: one web app for setting a terminal up and for administering it afterwards, in two modes.
	rpc_error.h
	Turn a node's JSON-RPC refusal into a line an operator can act on.
	settings.cpp
	NVS-backed implementation of the persistent device settings.
	settings.h
	Persistent device settings stored in NVS (backlight, Wi-Fi creds).
	settings_rules.h
	What a setting may be, apart from where it is stored.
	tap_icon.c
	tap_icon.h
	touch_cal.h
	Touch arithmetic: two-point calibration, and the second-contact guard.
	tron_rpc.cpp
	Tron HTTP API client implementation.
	tron_rpc.h
	Tron HTTP API client (Nile testnet): build a TRX transfer, broadcast it signed, poll its receipt.
	tron_tx.cpp
	Implementation of the Tron transaction hex helpers.
	tron_tx.h
	Tron transaction hex helpers — protobuf varints, the TransferContract integrity check and the signed-Transaction envelope.
	ui.cpp
	Touchscreen UI implementation built on LVGL 8.x.
	ui.h
	Touchscreen UI API: screens, events and transaction states for the CYD (ILI9341 + XPT2046) payment flow.
	ui_admin.cpp
	The settings page, touch calibration and the admin-code screens.
	ui_hal.cpp
	Panel and touch hardware: TFT_eSPI flush, XPT2046 reads, the LVGL display and input drivers, backlight PWM.
	ui_internal.h
	Private to the ui*.cpp files: the state and helpers they share.
	ui_sale.cpp
	The sale flow: amount, confirm, PIN, transaction status, and their page chrome.
	ui_setup.cpp
	First-run setup on the panel: welcome, the browser hand-off, card reads, Wi-Fi.
	ui_theme.cpp
	Colours, the LVGL theme and the shared layout metrics.
	ui_widgets.cpp
	Widget helpers shared by every screen, and the Wi-Fi signal mark.
	wdt.h
	Task-watchdog feed that is safe to call from any task.

Directories

Files