基于Semantic SBT和Lit Protocol实现隐私数据分享,用户可以给满足指定条件的地址分享自己的隐私数据。
使用Lit Protocol对数据进行加密与解密,arweave存储密文、加密后的密钥以及分享条件,Semantic SBT用于存储arweave的哈希以及定义分享条件。
分享的条件可以设置成:
隐私数据分享流程
加密
将待分享的隐私数据,通过Lit Protocol 进行加密,并将加密结果(accessCondition、encryptedSymmetricKey、encryptedObject)封装成encryptMetaDada上传至存储层(arweave等),得到encryptMetaDada的地址。
Copy {
"encryptionBy" : "lit-protocol" ,
"accessCondition" : [
{
"contractAddress" : "${contract address of Semantic SBT}" ,
"standardContractType" : "ERC721" ,
"chain" : "polygon" ,
"method" : "isViewerOf" ,
"parameters" : [
":userAddress" ,
"${tokenId}"
] ,
"returnValueTest" : {
"comparator" : "=" ,
"value" : true
}
}
] ,
"encryptedSymmetricKey" : "a hex string that LIT will use to decrypt your content as long as you satisfy the conditions" ,
// encrypted content
"encryptedObject" : "AhgXUao1QU2iQg34UsCw0-ptkoy_fhifEoqEs3_Zj1s="
}
Mint隐私SBT
基于Semantic SBT规范实现一个PrivacySemanticSBT合约,mint一个带隐私数据的SBT。其中该SBT的RDF中的object为arweave/ipfs的地址。
SemanticSBTPrivacy合约方法调用流程
Copy const tokenId = await PrivacySemanticSBT .prepareTokenId ();
//Mint SBT
PrivacySemanticSBT .mintWithPrivacy (tokenId , arweaveHash);
//添加viewer
await PrivacySemanticSBT .addViewer (address1 , tokenId);
Copy :Soul_0x0000000000000000000000000000000000000000 p:telgramAccount "[Privacy]ar://djbZ5l5Ij5zBEgFFnVlDDqa4z5ACtS_A9uWPmAVwRe"
encryptedObject的组成
web3存储系统,e.g: ar:// 或 ipfs://
Copy [Privacy]ar://djbZ5l5Ij5zBEgFFnVlDDqa4z5ACtS_A9uWPmAVwRe
解密
解密方从SBT的object中获取encryptMetaDada。调用LitProtocol的解密方法 ,即可解密得到明文的object。
Access Control Conditions Types
允许设置不同类型的访问条件,来控制用户访问隐私数据。
User holds an NFT in a collection
如果解密者拥有指定NFT集合的token,则有权限解密隐私数据。
Copy [
{
"contractAddress": "0x3110c39b428221012934A7F617913b095BC1078C",
"standardContractType": "ERC721",
"chain": "ethereum",
"method": "balanceOf",
"parameters": [ ":userAddress" ],
"returnValueTest": { "comparator": ">", "value": "0" }
}
]
User holds an SBT in a collection
如果解密者拥有指定SBT集合的token,则有权限解密隐私数据。
Copy [
{
"contractAddress": "0x588368698213bdf05aa722936d7657df8f3abe27",
"standardContractType": "ERC721",
"chain": "polygon",
"method": "balanceOf",
"parameters": [ ":userAddress" ],
"returnValueTest": { "comparator": ">", "value": "0" }
}
]
User owns a specific wallet address
如果解密者拥有指定的钱包地址,则有权限解密隐私数据。
Copy [
{
"contractAddress": "",
"standardContractType": "",
"chain": "ethereum",
"method": "",
"parameters": [
":userAddress",
],
"returnValueTest": {
"comparator": "=",
"value": "0x50e2dac5e78B5905CB09495547452cEE64426db2"
}
}
]
User holds at least XX ERC20 Token
如果解密者拥有指定数量的ERC20token,则有权限解密隐私数据。
Copy [
{
"contractAddress": "0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2",
"standardContractType": "ERC20",
"chain": "ethereum",
"method": "balanceOf",
"parameters": [
":userAddress"
],
"returnValueTest": {
"comparator": ">",
"value": "0"
}
}
]
Using boolean operations (AND + OR) for any of the above
可以使用AND或OR任意组合上述条件。