airalab/robonomics v51 on GitHub

runtime spec_version: 51.

This release completes most of Phase 1: community governance and the CPS authority model, and starts the groundwork for embedded clients see docs/robonomics-5.0-roadmap.md.

Highlights

1. On-chain governance (OpenGov)

A minimal, permissionless OpenGov stack, controlled by XRT holders (#652, #629):

pallet-preimage, pallet-scheduler, pallet-referenda, pallet-conviction-voting, pallet-whitelist, pallet-collective.
Only two tracks:
- Root: the normal path for runtime upgrades and any privileged call.
- Whitelisted Caller: a fast track for technical changes. The Core Team collective can only whitelist a call hash. The call still needs a public XRT-holder referendum to run.
No Council, no developer Root key.

This is stage A (bootstrap) of the handover. Sudo remains only as a recovery path. The next step is a runtime upgrade that removes Sudo, submitted and enacted through OpenGov itself (#633).

2. CPS v1.0: Scope and Access

pallet-robonomics-cps moves from per-node owners to the Scope / Access model (#653; #649, #654, #656, #661, #670–#672):

Nodes     NodeId  -> { parent, scope }
Children  NodeId  -> bounded child ids
Scopes    ScopeId -> { owner, access_count }
Access    ScopeId x (NodeId, AccountId) -> AccessFlags

Scope is the administrative and economic boundary of a subtree. A node belongs to its nearest Scope ancestor. A nested Scope is a hard boundary for authority, Access and, later, resource accounting.
A node's parent never changes. move_node is removed. To relocate a node, create a new node and delete the old one.
Access delegates capabilities inside one Scope:
- Write changes a node's meta and payload.
- CreateScope creates or replaces a Scope generation. This is also how control is handed over.
- GrantMode::Node | Subtree applies a grant to one node or to its descendants. A grant never crosses a nested Scope.
Changing the owner creates a new generation. A fresh ScopeId is allocated and the old grants stop working immediately. The transfer/accept flow and delete_scope are removed. A Scope disappears only when its root is deleted, which is allowed only once the root has no children.
Bounded, synchronous cleanup. Each Scope can hold only a limited number of Access entries, so they are cleared in the same extrinsic. There is no background GC.
Depth is limited per Scope, not globally. MAX_SCOPE_DEPTH limits the walk to the nearest Scope root. The whole tree can be deeper.
Weights follow data size. create_node, set_meta and set_payload are charged by actual bytes. Hard limits: 1 KiB for meta, 8 KiB for payload.
Runtime API. CpsApi::resolve_scope(node) returns { id, root, owner } through the standard runtime call on polkadot-omni-node. No custom RPC is needed (#651). It ships in the new crate pallet-robonomics-cps-runtime-api.

3. `robonomics-runtime-metadata` crate

Runtime metadata extraction and checking moved out of subxt-api into a separate crate. It is now the single source of truth for all API generators (#665, #663):

robonomics-runtime-metadata  (METADATA: &[u8])
   ├── robonomics-runtime-subxt-api   Rust / Subxt
   └── robonomics-runtime-embed-api   embedded tooling (next)

subxt-api forwards the build-metadata and check-metadata features, so existing commands keep working.

4. Engineering baseline

Weight policy in CI. scripts/check-weights.pl fails any extrinsic that is not charged through a benchmarked WeightInfo (#645).
try-runtime is mandatory whenever a storage version is bumped (#646). Security review checkpoints are defined (#647).
The Robonomics 5.0 roadmap is now in the repository (#644).
Local dev chain with no extra binaries. scripts/build-development-spec.sh plus polkadot-omni-node --dev starts a single-node chain with pre-funded accounts on ws://127.0.0.1:9944.
Dependency updates:
- subxt 0.51

Where we are on the roadmap

Phase 1  Runtime, Governance, CPS foundation
   runtime separation (v50)                   done
   OpenGov stack                              done  <- this release
   Sudo removal via governance                next  (#633)
   CPS node model, immutable hierarchy        done  <- this release
   Scope / Access / Write                     done  <- this release

Phase 2  Subscription and Transactions        in progress
   account-scoped generations,
   XRT-denominated transaction budget         design ready (#657)
   port of pallet-subscription (#381)         almost done (#635)
   runtime integration, governance params,
   runtime API and tooling                    open (#636, #638, #639)
   RWS -> Subscription migration plan         done (#637)
   embedded clients:
     runtime metadata crate                   done (#663)
     scale-embed C codec                      done (#664)
     embed-api / embed-codegen / fingerprints open (#662, #666, #667)

Phase 3  Storage (Bulletin Chain)             planned (E6-E8)
Phase 4  Compute (RISC Zero)                  research (#659)
Phase 5  Programmable CPS (Policy)            planned

Next release: remove Sudo through OpenGov and land Subscription with Scope-funded transactions, so an owner-funded device can send its first transaction without holding XRT.

Upgrade notes

Governance: after this upgrade, runtime upgrades go through Root or Whitelisted Caller referenda. Sudo remains only as a temporary recovery mechanism.
CPS (breaking): the storage layout and the set of extrinsics have changed.
- move_node, transfer_ownership, accept_ownership and delete_scope are removed.
- resolve_ownership is replaced by resolve_scope.
- meta above 1 KiB and payload above 8 KiB are rejected.
Clients and libcps: get the effective owner through CpsApi::resolve_scope instead of walking the parent chain on the client side.
Integrators: subxt-api now needs subxt 0.51.x. For metadata, depend on robonomics-runtime-metadata instead of subxt-api.

Full Changelog: v50...v51

Runtime Info

🏋️  Runtime size:		1.243 MB (1,303,658 bytes)
🗜  Compressed:			Yes, 83.49%
✨ Reserved meta:		OK - [6D, 65, 74, 61]
🎁 Metadata version:		V14
🔥 Core version:			robonomics-51 (robonomics-airalab-1.tx4.au1)
#️⃣  Blake2-256 hash:		0xacb849eb6b1c21457c34e85c670ee15860cd6c7d6fcb3adcf82aef57f45ff88c

airalab/robonomics v51 Robonomics v51: Governance on GitHub