Application core

Boot sequence, payment-flow orchestration and the ESP-IDF entry point. More...

Files
file	main/boot.cpp
	Bring-up: NVS, panel, reader, wallet, addresses, setup wizard, Wi-Fi and clock — everything before the main loop.
file	main/card_io.cpp
	The card on the reader: is it usable, open a channel, sign, read the payout addresses off it.
file	main/hardening.h
	Decision-integrity primitives (see docs/HARDENING.md §3, §4).
file	main/main.cpp
	cryptnox-pos entry point: touchscreen USDC payment terminal.
file	main/money.h
	The sale's arithmetic: keypad cents, base units, wei, fees, calldata.
file	main/pay.cpp
	What a sale is paid with and to, and the sale between broadcast and verdict.
file	main/pay_evm.cpp
	Ethereum and Polygon: endpoint, fees, pre-flight balance, sign and broadcast an EIP-1559 transfer.
file	main/pay_tron.cpp
	Tron: pre-flight balance, sign and broadcast a TRX or TRC-20 transfer.
file	main/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.

Detailed Description

Boot sequence, payment-flow orchestration and the ESP-IDF entry point.

Wires the subsystems together and drives the interaction loop: amount entry → confirm → card sign → RLP encode → JSON-RPC broadcast → on-chain receipt.