签名消息与签名结构化数据
内容
签名消息与签名结构化数据¶
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在 Ethereum 中，建议遵循 EIP-712 对数据进行签名和验证签名，而在 Conflux 中，我们遵循 CIP-23 对数据进行签名和验证。
对数据进行签名和验证的方式与 eth-account 一致，这里是示例。
Sign Message¶
from cfx_account import Account
from cfx_account.messages import encode_defunct
message = "Hello World"
acct = Account.create()
# 消息在签名前需要进行预处理
signable_message = encode_defunct(text=message)
# 签名
signed = acct.sign_message(signable_message)
# 验签
assert acct.address == Account.recover_message(signable_message, signature=signed.signature)
签名结构化数据¶
如下所示, typed_data 是由 CIP-23 定义的数据结构。其与 EIP-712 定义的结构体的主要区别在于 EIP712Domain 被替换为了 CIP23Domain，且domain字段的chainId字段必须要填写。
from cfx_account.messages import encode_structured_data
typed_data = {
"types": {
"CIP23Domain": [
{
"name": "name",
"type": "string"
},
{
"name": "version",
"type": "string"
},
{
"name": "chainId",
"type": "uint256"
},
{
"name": "verifyingContract",
"type": "address"
}
],
"Person": [
{
"name": "name",
"type": "string"
},
{
"name": "wallet",
"type": "address"
}
],
"Mail": [
{
"name": "from",
"type": "Person"
},
{
"name": "to",
"type": "Person"
},
{
"name": "contents",
"type": "string"
}
]
},
"primaryType": "Mail",
"domain": {
"name": "Ether Mail",
"version": "1",
"chainId": 1,
"verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
},
"message": {
"from": {
"name": "Cow",
"wallet": "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826"
},
"to": {
"name": "Bob",
"wallet": "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB"
},
"contents": "Hello, Bob!"
}
}
# 预处理数据
signable_message = encode_structured_data(primitive=typed_data)
# 签名
signed = acct.sign_message(signable_message)
# 验签
assert acct.address == Account.recover_message(signable_message, signature=signed.signature)