def create_nonce(idx):
if idx != get_master_nonce_idx():
old_nonce = config.get(beam_app_id(), idx)
new_nonce = bytearray(32)
if old_nonce:
new_nonce = bytearray(old_nonce)
master_nonce = config.get(beam_app_id(), get_master_nonce_idx())
beam.create_derived_nonce(master_nonce, idx, new_nonce)
config.set(beam_app_id(), idx, new_nonce)
return old_nonce, new_nonce
async def get_nonce_public(ctx, msg):
idx = msg.slot
if idx == get_master_nonce_idx() or idx > 255:
return Failure(message='Incorrect slot provided')
if not is_master_nonce_created():
return Failure(message='Nonce Generator is not initialized')
pubkey_x, pubkey_y = get_nonce_pub(msg.slot)
return BeamECCPoint(x=pubkey_x, y=int(pubkey_y[0]))
async def generate_nonce(ctx, msg):
gc.collect()
idx = msg.slot
if idx == get_master_nonce_idx() or idx > 255:
return Failure(message="Incorrect slot provided")
if not is_master_nonce_created():
return Failure(message="Nonce Generator is not initialized")
_, new_nonce = create_nonce(idx)
pubkey_x, pubkey_y = calc_nonce_pub(new_nonce)
return BeamECCPoint(x=pubkey_x, y=int(pubkey_y[0]))
def create_master_nonce(seed):
master_nonce = bytearray(32)
beam.create_master_nonce(master_nonce, seed)
config.set(beam_app_id(), get_master_nonce_idx(), master_nonce)
for idx in range(1, 255):
consume_nonce(idx)
def get_nonce_pub(idx):
if idx != get_master_nonce_idx():
nonce = config.get(beam_app_id(), idx)
return calc_nonce_pub(nonce)
def is_master_nonce_created():
master_nonce = config.get(beam_app_id(), get_master_nonce_idx())
return master_nonce is not None
