# Draft: JSON-RPC Cashu WebSocket Spec

## Example: check_proof method

### Wallet Request

Request made by wallet to initiate the subscription

{
    "jsonrpc": "2.0",
    "method": "check_proof",
    "params":{
        "ids": ["<quote_id>"]
    },
    "id": 1
}

### Mint Response

Mint can accept the request and respond with a result containing the subId for this subscription

{
    "jsonrpc": "2.0",
    "result": {
        "subId": 12345
    },
    "id": 1
}

or decline the request and respond with an error

{
    "jsonrpc": "2.0",
    "error": {
        "code": -32601,
        "message": "Unsupported method"
    },
    "id": 1
}

### Updates (Mint -> Wallet)

Whenever state relevant to a subscription changes the mint notifies the wallet using a notification that references `subId`

{
    "jsonrpc": "2.0",
    "method": "check_proof",
    "params": {
        "subId": 12345,
        "Y": "<hex_str>",
        "state": "<str_enum[STATE]>",
        "witness": "<str|null>"
    }
}