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from ._eip712_base import is_address, is_block_number, is_chain_id, is_eth_privkey, is_signature, recover, sign
[docs]
def _create_eip712_member_unregister(chainId: int, verifyingContract: bytes, member: bytes, retired: int) -> dict:
"""
:param chainId:
:param verifyingContract:
:param member:
:param retired:
:return:
"""
assert is_chain_id(chainId)
assert is_address(verifyingContract)
assert is_address(member)
assert is_block_number(retired)
data = {
"types": {
"EIP712Domain": [
{"name": "name", "type": "string"},
{"name": "version", "type": "string"},
],
"EIP712MemberUnregister": [
{"name": "chainId", "type": "uint256"},
{"name": "verifyingContract", "type": "address"},
{"name": "member", "type": "address"},
{"name": "retired", "type": "uint256"},
],
},
"primaryType": "EIP712MemberUnregister",
"domain": {
"name": "XBR",
"version": "1",
},
"message": {
"chainId": chainId,
"verifyingContract": verifyingContract,
"member": member,
"paired": retired,
},
}
return data
[docs]
def sign_eip712_member_unregister(
eth_privkey: bytes, chainId: int, verifyingContract: bytes, member: bytes, retired: int
) -> bytes:
"""
:param eth_privkey: Ethereum address of buyer (a raw 20 bytes Ethereum address).
:type eth_privkey: bytes
:return: The signature according to EIP712 (32+32+1 raw bytes).
:rtype: bytes
"""
assert is_eth_privkey(eth_privkey)
data = _create_eip712_member_unregister(chainId, verifyingContract, member, retired)
return sign(eth_privkey, data)
[docs]
def recover_eip712_member_unregister(
chainId: int, verifyingContract: bytes, member: bytes, retired: int, signature: bytes
) -> bytes:
"""
Recover the signer address the given EIP712 signature was signed with.
:return: The (computed) signer address the signature was signed with.
:rtype: bytes
"""
assert is_signature(signature)
data = _create_eip712_member_unregister(chainId, verifyingContract, member, retired)
return recover(data, signature)