> ## Documentation Index > Fetch the complete documentation index at: https://docs.windrose.market/llms.txt > Use this file to discover all available pages before exploring further. # Contract addresses for a chain > The contract addresses the app uses for one chain, read from `packages/abis/deployments/.json` on every request (`source: deployment-file`). For the default chain only, when the file is absent, the addresses can come from `NEXT_PUBLIC_*` environment variables (`source: env`). When neither yields the required set, `addresses` is `null` and `source` is `none`. An unknown chain id answers `400`. ## OpenAPI ````yaml /openapi/windrose.yaml get /api/deployment openapi: 3.1.0 info: title: Windrose API version: 1.0.0 summary: Public indexer and web-app endpoints for Windrose. description: > Windrose runs one [Ponder](https://ponder.sh) indexer per chain. Each indexer serves the GraphQL API at `POST /graphql` plus the status routes below. The two `/api/*` routes are served by the web app on `https://windrose.market` and describe the registered chains and their contract addresses. No authentication. Every response carries `access-control-allow-origin: *`. The endpoints are public and best-effort. contact: name: Windrose url: https://windrose.market servers: - url: https://api.windrose.market description: Robinhood Chain indexer - url: https://api.windrose.market/testnet description: Robinhood testnet indexer - url: https://api-arc.windrose.market description: Arc testnet indexer security: [] tags: - name: GraphQL description: >- The indexer's GraphQL API. Conventions and per-table queries are documented in the GraphQL pages. - name: Indexer status description: >- Liveness, readiness, indexing progress and Prometheus metrics of an indexer. - name: Web app description: JSON routes of the Windrose web app on windrose.market. paths: /api/deployment: get: tags: - Web app summary: Contract addresses for a chain description: > The contract addresses the app uses for one chain, read from `packages/abis/deployments/.json` on every request (`source: deployment-file`). For the default chain only, when the file is absent, the addresses can come from `NEXT_PUBLIC_*` environment variables (`source: env`). When neither yields the required set, `addresses` is `null` and `source` is `none`. An unknown chain id answers `400`. operationId: deployment parameters: - name: chainId in: query required: false description: Chain id from the registry. Defaults to the app's default chain. schema: type: integer enum: - 4663 - 46630 - 5042002 - 5042 example: 4663 responses: '200': description: The addresses, or `null` when the chain has no deployment. headers: cache-control: schema: type: string example: no-store content: application/json: schema: $ref: '#/components/schemas/DeploymentResponse' examples: robinhood: summary: Robinhood Chain (deployment file) value: chainId: 4663 source: deployment-file path: deployments/4663.json addresses: factory: '0x3057566F58742B113Db615b2cb0E1085E766Ac54' router: '0xae4E359895B7a232eEA55238256dcbDa9851c1CF' registry: '0xc3A0ac0eF92392A37287AfE99D401679BA00988a' stateView: '0xF3334192D15450CdD385c8B70e03f9A6bD9E673b' usdc: '0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168' usdcSymbol: USDG usdcMintable: false keeperOracle: '0x213cC7E5268563a05dbB8C7eF11680E595c7e63e' poolManager: '0x8366a39CC670B4001A1121B8F6A443A643e40951' currencies: INR: synth: '0x22A2Ab77a9Cc29427f3E79AB9D925AE224787c8E' vault: '0x2B55f325a7e84009C659148a36285cAfBDf4BE85' JPY: synth: '0xAC5A99Fd60B1Ac2129BDe306A6AAdc1B8b6ea4eb' vault: '0x42f9A4cC2da15d13807A1Be09f3C538100ccC40f' none: summary: A registered chain without a deployment value: chainId: 5042 source: none addresses: null '400': description: The chain id is not a positive integer or is not in the registry. content: application/json: schema: type: object required: - error properties: error: type: string examples: unregistered: summary: Not in the registry value: error: >- chain id 1 is not in the registry packages/abis/chains.json. Known chains: 5042002 (arc-testnet), 5042 (arc), 46630 (robinhood-testnet), 4663 (robinhood) malformed: summary: Not an integer value: error: chain id "abc" is not a positive integer servers: - url: https://windrose.market description: Windrose web app components: schemas: DeploymentResponse: type: object required: - chainId - source - addresses properties: chainId: type: integer source: type: string enum: - deployment-file - env - none description: Where the addresses came from. path: type: string description: >- Present with `source: deployment-file`; the file as `deployments/.json`. addresses: oneOf: - $ref: '#/components/schemas/Addresses' - type: 'null' Addresses: type: object required: - factory - router - registry - stateView - usdc - usdcSymbol - usdcMintable properties: factory: $ref: '#/components/schemas/Address' router: $ref: '#/components/schemas/Address' registry: $ref: '#/components/schemas/Address' stateView: $ref: '#/components/schemas/Address' usdc: allOf: - $ref: '#/components/schemas/Address' description: >- The dollar token launches settle in (USDC on Arc, USDG on Robinhood Chain). The field keeps its contract-facing name. usdcSymbol: type: string description: ERC-20 symbol of `usdc`. usdcMintable: type: boolean description: '`usdc` is a mock with a public mint (testnets).' keeperOracle: $ref: '#/components/schemas/Address' poolManager: $ref: '#/components/schemas/Address' eurc: $ref: '#/components/schemas/Address' currencies: type: object description: >- Windrose currencies keyed by ISO code, each with its synthetic token and vault. additionalProperties: type: object required: - synth - vault properties: synth: $ref: '#/components/schemas/Address' vault: $ref: '#/components/schemas/Address' Address: type: string pattern: ^0x[0-9a-fA-F]{40}$ description: EVM address, checksummed as written in the deployment file. example: '0x3057566F58742B113Db615b2cb0E1085E766Ac54' ````