OK, so I got this (thx nostr:nprofile1qqsg7vaqr8y4gkft8d07dqmztr8aqd9mxdhvyd4ylf9em8fv24wmajqprfmhxue69uhkummnw3ezucnfw33k76twd9ehgtn0wfnszynhwden5te0vdkrgtn5de5hstnyv4mqzynhwden5te0wp6hyurvv4cxzeewv4esencz9g)

Now, how does this stuff work? I simply received it in my Alby wallet. But I thought this ecash thing ran differently? Is this just LN then?