#include <Arduino.h>
#include <SPI.h>
#include "keccak256.h"
#include <WiFiS3.h>
#include <ArduinoHttpClient.h>
#include "util.h"
#include "config.h"
#include <CryptnoxWallet.h>

Include dependency graph for UsdcSigning.ino:

Classes
struct	Tx2
	Ethereum EIP-1559 transaction structure. More...

Macros
#define	PN532_SS_PIN (10U)
	PN532 SPI slave-select pin.
#define	CARD_PIN "000000000"
#define	CARD_PIN_LEN (9U)
#define	RPC_PATH "/"
#define	WIFI_CA_CERT
#define	ERC20_TRANSFER_SEL_0 0xa9U
#define	ERC20_TRANSFER_SEL_1 0x05U
#define	ERC20_TRANSFER_SEL_2 0x9cU
#define	ERC20_TRANSFER_SEL_3 0xbbU
#define	ERC20_INDEX_OFFSET 64U
#define	YPARITY_UNKNOWN 0xFFU
	Sentinel returned by determineYParity() when recovery fails.
#define	HTTP_OK 200
	Expected HTTP 200 OK status code.
#define	TX_MAX_RETRIES 3U
	Maximum number of send-transaction attempts before giving up.
#define	TX_RETRY_DELAY_MS 2000U
	Delay in ms between send-transaction retry attempts.
#define	WIFI_RETRY_MAX 20U
	Maximum WiFi reconnect poll iterations (each iteration waits 500 ms).
#define	HEX_CHAR_BUF_SIZE 3U
	Buffer size for a two-hex-char + NUL string used in byte-to-hex conversion.
#define	ECRECOVER_V_PAD_CHARS 62U
	Number of leading zero hex characters in the ecrecover v-field padding.
#define	ECRECOVER_V_BASE 27U
	Base value for Ethereum ecrecover v parameter (yParity=0 → v=27, yParity=1 → v=28).
#define	RLP_ITEM_OR_FAIL(BUF, CAP, OFF, IN, IN_LEN)

Functions
PN532Adapter	nfc (serialAdapter, PN532_SS_PIN, &SPI)
static void	printHex (const char label, const uint8_t data, size_t len)
static bool	ensureWiFi ()
static size_t	rlpEncodeTxBody (uint8_t *buf, size_t bufCap, const Tx2 &tx)
static size_t	rlpFinalize (uint8_t out, size_t outCap, const uint8_t buf, size_t off)
size_t	rlpEncodeUnsignedTx (const Tx2 &tx, uint8_t *out, size_t outCap)
size_t	rlpEncodeSignedTx (const Tx2 &tx, const uint8_t r, const uint8_t s, const uint8_t v, uint8_t out, size_t outCap)
size_t	encodeERC20Transfer (uint8_t *out)
	Encode calldata for ERC-20 transfer(address to, uint256 amount).
bool	sendRawTx (const uint8_t *raw, size_t len)
	Send a raw signed transaction via JSON-RPC.
uint8_t	determineYParity (const uint8_t hash, const uint8_t r, const uint8_t *s)
	Determine EIP-1559 yParity by calling the Ethereum ecrecover precompile.
uint8_t	fetchNonce (uint64_t *nonce)
	Fetch the current nonce for ADDR_FROM via eth_getTransactionCount.
void	setup ()
	Arduino setup: init PN532, connect WiFi, build tx, sign with Cryptnox card, send.
void	loop ()
	Arduino loop (empty — transaction is sent once in setup).

Variables
ArduinoLoggerAdapter	serialAdapter
ArduinoCryptoProvider	cryptoProvider
ArduinoPlatform	platform
CryptnoxWallet	wallet (nfc, serialAdapter, cryptoProvider, platform)
static const char	hexChars [] = "0123456789abcdef"

Macro Definition Documentation

◆ CARD_PIN

#define CARD_PIN "000000000"

Definition at line 37 of file UsdcSigning.ino.

◆ CARD_PIN_LEN

#define CARD_PIN_LEN (9U)

Definition at line 38 of file UsdcSigning.ino.

◆ ECRECOVER_V_BASE

#define ECRECOVER_V_BASE 27U

Base value for Ethereum ecrecover v parameter (yParity=0 → v=27, yParity=1 → v=28).

Examples: UsdcSigning.ino.

Definition at line 128 of file UsdcSigning.ino.

Referenced by determineYParity().

◆ ECRECOVER_V_PAD_CHARS

#define ECRECOVER_V_PAD_CHARS 62U

Number of leading zero hex characters in the ecrecover v-field padding.

Examples: UsdcSigning.ino.

Definition at line 126 of file UsdcSigning.ino.

Referenced by determineYParity().

◆ ERC20_INDEX_OFFSET

#define ERC20_INDEX_OFFSET 64U

Examples: UsdcSigning.ino.

Definition at line 109 of file UsdcSigning.ino.

Referenced by encodeERC20Transfer().

◆ ERC20_TRANSFER_SEL_0

#define ERC20_TRANSFER_SEL_0 0xa9U

ERC-20 transfer(address,uint256) function selector: keccak256("transfer(address,uint256)")[0..3]

Examples: UsdcSigning.ino.

Definition at line 104 of file UsdcSigning.ino.

Referenced by encodeERC20Transfer().

◆ ERC20_TRANSFER_SEL_1

#define ERC20_TRANSFER_SEL_1 0x05U

Examples: UsdcSigning.ino.

Definition at line 105 of file UsdcSigning.ino.

Referenced by encodeERC20Transfer().

◆ ERC20_TRANSFER_SEL_2

#define ERC20_TRANSFER_SEL_2 0x9cU

Examples: UsdcSigning.ino.

Definition at line 106 of file UsdcSigning.ino.

Referenced by encodeERC20Transfer().

◆ ERC20_TRANSFER_SEL_3

#define ERC20_TRANSFER_SEL_3 0xbbU

Examples: UsdcSigning.ino.

Definition at line 107 of file UsdcSigning.ino.

Referenced by encodeERC20Transfer().

◆ HEX_CHAR_BUF_SIZE

#define HEX_CHAR_BUF_SIZE 3U

Buffer size for a two-hex-char + NUL string used in byte-to-hex conversion.

Examples: UsdcSigning.ino.

Definition at line 124 of file UsdcSigning.ino.

Referenced by sendRawTx().

◆ HTTP_OK

#define HTTP_OK 200

Expected HTTP 200 OK status code.

Examples: UsdcSigning.ino.

Definition at line 115 of file UsdcSigning.ino.

Referenced by determineYParity(), fetchNonce(), and sendRawTx().

◆ PN532_SS_PIN

#define PN532_SS_PIN (10U)

PN532 SPI slave-select pin.

Definition at line 31 of file UsdcSigning.ino.

◆ RLP_ITEM_OR_FAIL

#define RLP_ITEM_OR_FAIL	(	BUF,
		CAP,
		OFF,
		IN,
		IN_LEN )

Value:

    do {                                                                    \
        uint32_t _w = RlpEncodeItem((BUF) + (OFF), (CAP) - (OFF),           \
                                    (IN), (IN_LEN));                        \
        if (_w == 0U) { return 0U; }                                        \
        (OFF) += _w;                                                        \
    } while (0)