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from typing import Optional
from ._eip712_base import sign, recover, is_address, is_signature, is_eth_privkey, \
is_bytes16, is_chain_id
[docs]def _create_eip712_catalog_create(chainId: int, verifyingContract: bytes, member: bytes, created: int,
catalogId: bytes, terms: str, meta: Optional[str]) -> dict:
"""
:param chainId:
:param verifyingContract:
:param member:
:param created:
:param catalogId:
:param terms:
:param meta:
:return:
"""
assert is_chain_id(chainId)
assert is_address(verifyingContract)
assert is_address(member)
assert is_bytes16(catalogId)
data = {
'types': {
'EIP712Domain': [
{
'name': 'name',
'type': 'string'
},
{
'name': 'version',
'type': 'string'
},
],
'EIP712CatalogCreate': [
{
'name': 'chainId',
'type': 'uint256'
},
{
'name': 'verifyingContract',
'type': 'address'
},
{
'name': 'member',
'type': 'address'
},
{
'name': 'created',
'type': 'uint256'
},
{
'name': 'catalogId',
'type': 'bytes16'
},
{
'name': 'terms',
'type': 'string'
},
{
'name': 'meta',
'type': 'string'
},
]
},
'primaryType': 'EIP712CatalogCreate',
'domain': {
'name': 'XBR',
'version': '1',
},
'message': {
'chainId': chainId,
'verifyingContract': verifyingContract,
'member': member,
'created': created,
'catalogId': catalogId,
'terms': terms,
'meta': meta or '',
}
}
return data
[docs]def sign_eip712_catalog_create(eth_privkey: bytes, chainId: int, verifyingContract: bytes, member: bytes,
created: int, catalogId: bytes, terms: str, meta: Optional[str]) -> 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_catalog_create(chainId, verifyingContract, member, created, catalogId, terms, meta)
return sign(eth_privkey, data)
[docs]def recover_eip712_catalog_create(chainId: int, verifyingContract: bytes, member: bytes, created: int,
catalogId: bytes, terms: str, meta: Optional[str], 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_catalog_create(chainId, verifyingContract, member, created, catalogId, terms, meta)
return recover(data, signature)