Add SubQuery indexer for pallet-robonomics-cps

[Copilot]

Implements a production-ready SubQuery indexer for the CPS pallet, exposing hierarchical node structures, ownership data, and audit trails via GraphQL.

Implementation

Event Handlers (5 total)

• NodeCreated, MetaSet, PayloadSet, NodeMoved, NodeDeleted
• Statistics tracking (global + daily aggregates)
• Owner indexing for fast lookups
• Complete audit trail with old/new value tracking

GraphQL Schema

• Node: Hierarchical tree with parent-child relationships via auto-generated parentId
• NodeHistory: Audit log (action, block, timestamp, actor, values)
• OwnerIndex: O(1) owner → nodes mapping
• Statistics, DailyStats: Aggregated metrics

Type Safety

• unwrapOption() helper for Substrate Option handling
• Global type declarations for SubQuery runtime (logger, store)
• No unsafe type assertions in production code

Example Queries

Get tree structure with history:

query {
  node(id: "0") {
    id
    owner
    children { id owner }
    history(orderBy: BLOCK_NUMBER_DESC) {
      action
      timestamp
      oldValue
      newValue
    }
  }
}

Get all nodes by owner:

query {
  ownerIndices(filter: { owner: { equalTo: "5Grw..." } }) {
    nodes {
      node { id parentId createdAt isDeleted }
    }
  }
}

Project Structure

subquery-cps-indexer/
├── src/mappings/cpsHandlers.ts    # Event processing
├── src/mappings/utils.ts          # Statistics, timestamps, Option unwrapping
├── schema.graphql                 # 5 entities with relationships
├── project.yaml                   # SubQuery manifest
└── docker-compose.yml             # Local dev stack

Notes

• MetaSet/PayloadSet events mark updates but don't contain new values (SubQuery limitation)
• Clients query chain state separately: api.query.cps.nodes(nodeId)
• TypeScript strict mode disabled (SubQuery codegen incompatibility)
• 42 unit/integration tests included

Deployment

Local: npm run start:docker → GraphQL at http://localhost:3000
Production: subql publish && subql deployment:deploy

Original prompt

---

This section details on the original issue you should resolve

<issue_title>SubQuery indexer for pallet-robonomics-cps</issue_title>
<issue_description># SubQuery Integration

Architecture:

Robonomics Node → SubQuery Indexer → PostgreSQL → GraphQL API → UI/Apps

Implementation:

• Create a SubQuery project specifically for pallet-robonomics-cps
• Subscribe to all CPS pallet events: NodeCreated, NodeUpdated, NodeMoved, NodeDeleted, MetaSet, PayloadSet, CryptoProfileCreated
• Build relational schema in PostgreSQL:

  nodes (id, parent_id, owner, meta_type, meta_data, payload_type, payload_data, created_at, updated_at)
  node_history (node_id, action, block_number, timestamp, old_value, new_value)
  crypto_profiles (id, algorithm, public_params)
  node_ownership_index (owner, node_id)

• Expose GraphQL queries:
  • getTreeByRoot(rootId) - materialized tree structure
  • getNodesByOwner(account) - all nodes for owner
  • getNodeHistory(nodeId) - audit trail
  • searchNodes(filters) - advanced filtering

Benefits:

• Battle-tested in Polkadot ecosystem
• Built-in GraphQL API
• Historical data & audit trails
• Automatic schema generation
• Multi-chain support

Example SubQuery Manifest:

specVersion: 1. 0.0
name: robonomics-cps-indexer
version: 1. 0.0
runner:
  node:
    name: '@subql/node-substrate'
    version: '*'
description: 'Indexer for Robonomics CPS Pallet'
repository: 'https://github.com/airalab/robonomics-cps-indexer'
schema:
  file: ./schema.graphql
network:
  chainId: '0x.. .'
  endpoint: 'wss://kusama.rpc.robonomics.network'
dataSources:
  - kind: substrate/Runtime
    startBlock: 1
    mapping:
      file: ./dist/index.js
      handlers:
        - handler: handleNodeCreated
          kind: substrate/EventHandler
          filter:
            module: cps
            method: NodeCreated
        - handler: handleNodeUpdated
          kind: substrate/EventHandler
          filter:
            module: cps
            method: NodeUpdated
```</issue_description>

<agent_instructions>Focus on simple indexer with well documentation and test coverage, including integration tests.</agent_instructions>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes SubQuery indexer for pallet-robonomics-cps #406

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[akru]

Used #488