License Assets Through Lit Protocol
The Lit Protocol (opens in a new tab) is a decentralized key management network based on threshold cryptography. Lit allows for key issuance based on on-chain and off-chain state. Symmetric keys to encrypted assets can be stored in Lit and made accessible through a user satisfying the license for an asset.
More info on access control conditions in Lit can be found here (opens in a new tab)
VERIFY Access Standard for Lit
Asset nodes can provide access by encrypting the assets using the following patterns.
Asset Nodes
A asset should be encrypted making use of the Lit SDK (opens in a new tab), using the following access control condition:
{
"conditionType": "evmContract",
"contractAddress": `${contentGraphAddress}`,
"chain": `${chain}`,
"functionName": "auth",
"functionAbi": {
"inputs": [
{
"internalType": "bytes32",
"name": "id",
"type": "bytes32",
},
{
"internalType": "address",
"name": "user",
"type": "address",
},
],
"name": "auth",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool",
},
],
"stateMutability": "view",
"type": "function",
},
"functionParams": [`${id}`, ":userAddress"],
"returnValueTest": {
"key": "",
"comparator": "=",
"value": "true",
},
}Where:
- contentGraphAddress = the address of the content graph
- chain = the chain of the content graph smart contract
- id = the id of the token which you are encrypting/licensing
Access Schema
The following schema should be used in the metadata file for the asset node under the access field:
{
"data": {
"access": {
"lit-protocol": {
"accessControlCondition": "",
"dataHash": "",
}
}
}
}