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from ._eip712_base import (
is_address,
is_block_number,
is_bytes16,
is_chain_id,
is_eth_privkey,
is_signature,
recover,
sign,
)
[docs]
def _create_eip712_channel_open(
chainId: int,
verifyingContract: bytes,
ctype: int,
openedAt: int,
marketId: bytes,
channelId: bytes,
actor: bytes,
delegate: bytes,
marketmaker: bytes,
recipient: bytes,
amount: int,
) -> dict:
"""
:param chainId:
:param verifyingContract:
:param ctype:
:param openedAt:
:param marketId:
:param channelId:
:param actor:
:param delegate:
:param marketmaker:
:param recipient:
:param amount:
:return:
"""
assert is_chain_id(chainId)
assert is_address(verifyingContract)
assert type(ctype) == int
assert is_block_number(openedAt)
assert is_bytes16(marketId)
assert is_bytes16(channelId)
assert is_address(actor)
assert is_address(delegate)
assert is_address(marketmaker)
assert is_address(recipient)
assert type(amount) == int
data = {
"types": {
"EIP712Domain": [
{"name": "name", "type": "string"},
{"name": "version", "type": "string"},
],
"EIP712ChannelOpen": [
{"name": "chainId", "type": "uint256"},
{"name": "verifyingContract", "type": "address"},
{"name": "ctype", "type": "uint8"},
{"name": "openedAt", "type": "uint256"},
{"name": "marketId", "type": "bytes16"},
{"name": "channelId", "type": "bytes16"},
{"name": "actor", "type": "address"},
{"name": "delegate", "type": "address"},
{"name": "marketmaker", "type": "address"},
{"name": "recipient", "type": "address"},
{"name": "amount", "type": "uint256"},
],
},
"primaryType": "EIP712ChannelOpen",
"domain": {
"name": "XBR",
"version": "1",
},
"message": {
"chainId": chainId,
"verifyingContract": verifyingContract,
"ctype": ctype,
"openedAt": openedAt,
"marketId": marketId,
"channelId": channelId,
"actor": actor,
"delegate": delegate,
"marketmaker": marketmaker,
"recipient": recipient,
"amount": amount,
},
}
return data
[docs]
def sign_eip712_channel_open(
eth_privkey: bytes,
chainId: int,
verifyingContract: bytes,
ctype: int,
openedAt: int,
marketId: bytes,
channelId: bytes,
actor: bytes,
delegate: bytes,
marketmaker: bytes,
recipient: bytes,
amount: 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_channel_open(
chainId,
verifyingContract,
ctype,
openedAt,
marketId,
channelId,
actor,
delegate,
marketmaker,
recipient,
amount,
)
return sign(eth_privkey, data)
[docs]
def recover_eip712_channel_open(
chainId: int,
verifyingContract: bytes,
ctype: int,
openedAt: int,
marketId: bytes,
channelId: bytes,
actor: bytes,
delegate: bytes,
marketmaker: bytes,
recipient: bytes,
amount: 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_channel_open(
chainId,
verifyingContract,
ctype,
openedAt,
marketId,
channelId,
actor,
delegate,
marketmaker,
recipient,
amount,
)
return recover(data, signature)