getblockhash returns invalid json

[lploom]

The request

curl --unix-socket ~/.unicity/node.sock http://localhost/ -d '{"jsonrpc": "2.0", "method": "getblockhash", "params": [5], "id": 1}'

Returns:

{"result":ead522aca63d5c62e78bcbb218205f01159df9aa2cecb3444286473673df5834,"error":null,"id":0}

But should return:

{"result":"ead522aca63d5c62e78bcbb218205f01159df9aa2cecb3444286473673df5834","error":null,"id":0}

And same for getbestblockhash