def extract_chain_id(v: int) -> int:
if is_even(v):
chain_id = (v - EIP155_CHAIN_ID_OFFSET - 1) // 2
else:
chain_id = (v - EIP155_CHAIN_ID_OFFSET) // 2
if chain_id < 0:
raise ValidationError(
'Cannot extract chain id from object. Invalid signature or chain id.'
)
return chain_id
def extract_block_header_sender(block_header: BaseBlockHeader) -> bytes:
if is_even(block_header.v):
v = 28
else:
v = 27
r, s = block_header.r, block_header.s
canonical_v = v - 27
vrs = (canonical_v, r, s)
signature = keys.Signature(vrs=vrs)
message = block_header.get_message_for_signing()
public_key = signature.recover_public_key_from_msg(message)
sender = public_key.to_canonical_address()
return sender
def extract_signature_v(v: int) -> int:
if is_even(v):
return V_OFFSET + 1
else:
return V_OFFSET
def extract_chain_id(v: int) -> int:
if is_even(v):
return (v - EIP155_CHAIN_ID_OFFSET - 1) // 2
else:
return (v - EIP155_CHAIN_ID_OFFSET) // 2