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from typing import Optional
from ._eip712_base import sign, recover, is_chain_id, is_address, is_bytes16, is_cs_pubkey, \
is_block_number, is_signature, is_eth_privkey
[docs]def _create_eip712_node_pair(chainId: int, verifyingContract: bytes, member: bytes, paired: int,
nodeId: bytes, domainId: bytes, nodeType: int, nodeKey: bytes,
amount: int, config: Optional[str]) -> dict:
"""
:param chainId:
:param verifyingContract:
:param member:
:param paired:
:param nodeId:
:param domainId:
:param nodeKey:
:param amount:
:param config:
:return:
"""
assert is_chain_id(chainId)
assert is_address(verifyingContract)
assert is_address(member)
assert is_block_number(paired)
assert is_bytes16(nodeId)
assert is_bytes16(domainId)
assert type(nodeType) == int
assert is_cs_pubkey(nodeKey)
assert type(amount) == int
assert config is None or type(config) == str
data = {
'types': {
'EIP712Domain': [
{
'name': 'name',
'type': 'string'
},
{
'name': 'version',
'type': 'string'
},
],
'EIP712NodePair': [
{
'name': 'chainId',
'type': 'uint256'
},
{
'name': 'verifyingContract',
'type': 'address'
},
{
'name': 'member',
'type': 'address'
},
{
'name': 'paired',
'type': 'uint256'
},
{
'name': 'nodeId',
'type': 'bytes16'
},
{
'name': 'domainId',
'type': 'bytes16'
},
{
'name': 'nodeType',
'type': 'uint8'
},
{
'name': 'nodeKey',
'type': 'bytes16'
},
{
'name': 'amount',
'type': 'uint256',
},
{
'name': 'config',
'type': 'string',
},
]
},
'primaryType': 'EIP712NodePair',
'domain': {
'name': 'XBR',
'version': '1',
},
'message': {
'chainId': chainId,
'verifyingContract': verifyingContract,
'member': member,
'paired': paired,
'nodeId': nodeId,
'domainId': domainId,
'nodeType': nodeType,
'nodeKey': nodeKey,
'amount': amount,
'config': config or '',
}
}
return data
[docs]def sign_eip712_node_pair(eth_privkey: bytes, chainId: int, verifyingContract: bytes, member: bytes, paired: int,
nodeId: bytes, domainId: bytes, nodeType: int, nodeKey: bytes,
amount: int, config: 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_node_pair(chainId, verifyingContract, member, paired, nodeId, domainId, nodeType,
nodeKey, amount, config)
return sign(eth_privkey, data)
[docs]def recover_eip712_node_pair(chainId: int, verifyingContract: bytes, member: bytes, paired: int,
nodeId: bytes, domainId: bytes, nodeType: int, nodeKey: bytes,
amount: int, config: 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_node_pair(chainId, verifyingContract, member, paired, nodeId, domainId, nodeType,
nodeKey, amount, config)
return recover(data, signature)