See draft spec: https://github.com/verida/VIPs/blob/develop/VIPs/vip-6.md#research-next-steps - [x] Research next steps - [x] Finalise spec - [x] Implement in storage node - [ ] ~~Implement in SDK~~ See https://github.com/verida/verida-js/issues/272 - [x] Write passing unit tests