Download submodules:
git submodule update --init --recursive
Cross-compile micropython
cd micropython/mpy-cross
make
cd ../..
Also added 2 lines in micropython/ports/esp32/mpconfigport.h
:
#define MODULE_HASHLIB_ENABLED (1)
#define MODULE_ECC_ENABLED (1)
Copy over the micropython files:
cp -r libs/* micropython/ports/esp32/modules/
Compile firmware:
ESPIDF=~/esp/esp-idf make USER_C_MODULES=../../../usermods
Upload firmware
esptool.py --chip esp32 --port <port> --baud 460800 erase_flash
esptool.py --chip esp32 --port <port> --baud 460800 write_flash -z 0x1000 build/firmware.bin
Then we have two new modules:
bitcoin.ecc
containing ecc primitiveshashlib
with all hash functions
$ screen /dev/ttyUSB0 115200
>>> import bitcoin
>>> dir(bitcoin)
['__class__', '__name__', '__path__', 'helper', 'PrivateKey', 'PublicKey', 'ecc']
>>> dir(bitcoin.ecc)
['__class__', '__name__', 'BytesIO', '_ecc', 'hashlib', 'hexlify', 'hash160', 'encode_base58_checksum', 'decode_base58', 'p2pkh_script', 'hmac', 'N', 'FieldElement', 'PrivateKey', 'PublicKey', 'G']
>>> import hashlib
>>> dir(hashlib)
['__class__', '__name__', 'ripemd160', 'sha1', 'sha256', 'sha512']
import m5stack
from m5stack import LCD, fonts, color565
from bitcoin import PrivateKey
lcd = LCD()
lcd.set_font(fonts.tt24)
lcd.set_color(color565(0,50,250), color565(255,255,255)) # text color, background color
lcd.erase()
pk = PrivateKey.parse("Kyo7UhSKAXDSddUWE7FmUiTfZnvgmyVcapjUyPkhKxHF6ZXD7n2T")
# pk = PrivateKey(0x473628abb8917391, compressed=True, testnet=True)
lcd.set_pos(50,50)
lcd.print(pk.address())
from m5stack import LCD, fonts, color565
from m5stack import SDCard
import os
lcd = LCD()
lcd.set_font(fonts.tt24)
lcd.set_color(color565(0,50,250), color565(255,255,255)) # text color, background color
lcd.erase()
sd = SDCard()
os.mount(sd, '/sd')
files = os.listdir('/sd')
for file in files:
lcd.print(file)
os.umount('/sd')