openapi: 3.1.0
info:
  title: "NEAR Protocol RPC: Get light client execution proof"
  description: Fetch a Merkle proof of transaction or receipt inclusion by Base58 ID — the EXPERIMENTAL alias of `light_client_proof`.
  version: 1.0.0
servers:
  - url: https://rpc.mainnet.fastnear.com
    description: Mainnet
  - url: https://rpc.testnet.fastnear.com
    description: Testnet
  - url: https://archival-rpc.mainnet.fastnear.com
    description: Mainnet Archival
  - url: https://archival-rpc.testnet.fastnear.com
    description: Testnet Archival
paths:
  /:
    post:
      operationId: EXPERIMENTAL_light_client_proof
      summary: Get light client execution proof
      description: Fetch a Merkle proof of transaction or receipt inclusion by Base58 ID — the EXPERIMENTAL alias of `light_client_proof`.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - jsonrpc
                - id
                - method
                - params
              properties:
                jsonrpc:
                  type: string
                  enum:
                    - "2.0"
                id:
                  type: string
                  example: fastnear
                method:
                  type: string
                  enum:
                    - EXPERIMENTAL_light_client_proof
                params:
                  type: object
                  properties:
                    light_client_head:
                      type: string
                      description: Base58-encoded hash
                    sender_id:
                      type: string
                      description: NEAR account ID
                    transaction_hash:
                      type: string
                      description: Base58-encoded hash
                    type:
                      type: string
                      enum:
                        - transaction
                        - receipt
                      description: Proof subject — `transaction` proves inclusion of the top-level transaction, `receipt` proves inclusion of a specific receipt produced during execution.
                    receipt_id:
                      type: string
                      description: Base58-encoded hash
                    receiver_id:
                      type: string
                      description: NEAR account ID
                  required:
                    - light_client_head
            examples:
              mainnet:
                summary: Get light client execution proof (Mainnet)
                value:
                  jsonrpc: "2.0"
                  id: fastnear
                  method: EXPERIMENTAL_light_client_proof
                  params:
                    light_client_head: 9XN7MtDywZvfGx6TKy1MT2iCZkKuHikJXmNazxdZ4x6T
                    sender_id: escrow.ai.near
                    transaction_hash: 34E7weKCDqXh3xPKdBgSWRqo44yTWjbka9deMK8JbAxx
                    type: transaction
              testnet:
                summary: Get light client execution proof (Testnet)
                value:
                  jsonrpc: "2.0"
                  id: fastnear
                  method: EXPERIMENTAL_light_client_proof
                  params:
                    light_client_head: 6JYj6i1FaUCzdoqy41CqUcZJxa5n9EmLEENRDH2gLm5u
                    sender_id: near-mpc-staking4all-01.testnet
                    transaction_hash: 9LPbkwJ26HYgda7KHrURc6jozBcpdA1kUMSEzwm81JPx
                    type: transaction
      responses:
        "200":
          description: Successful response
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/JsonRpcResponse"
        "403":
          description: The supplied API key was not recognized.
          content:
            text/plain:
              schema:
                type: string
              example: Invalid API key
security:
  - {}
  - BearerAuth: []
  - ApiKeyAuth: []
components:
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: "FastNEAR API key as an `Authorization: Bearer` header. Preferred for backends, workers, and proxies because it keeps the key out of URLs and logs."
    ApiKeyAuth:
      type: apiKey
      in: query
      name: apiKey
      description: FastNEAR API key as the `apiKey` query parameter. Handy for curl or clients that cannot set headers, but the key can end up in URLs, logs, and shell history.
  schemas:
    JsonRpcResponse:
      type: object
      required:
        - jsonrpc
        - id
      properties:
        jsonrpc:
          type: string
          enum:
            - "2.0"
        id:
          oneOf:
            - type: string
            - type: number
        result:
          type: object
          properties:
            block_header_lite:
              type: object
              properties:
                inner_lite:
                  type: object
                  description: A part of a state for the current head of a light client. More info [here](https://nomicon.io/ChainSpec/LightClient).
                inner_rest_hash:
                  type: string
                  description: Base58-encoded hash
                prev_block_hash:
                  type: string
                  description: Base58-encoded hash
              required:
                - prev_block_hash
                - inner_rest_hash
                - inner_lite
            block_proof:
              type: array
              items:
                type: object
            outcome_proof:
              type: object
              properties:
                block_hash:
                  type: string
                  description: Base58-encoded hash
                id:
                  type: string
                  description: Base58-encoded hash
                outcome:
                  type: object
                proof:
                  type: array
                  items:
                    type: object
              required:
                - proof
                - block_hash
                - id
                - outcome
            outcome_root_proof:
              type: array
              items:
                type: object
          required:
            - outcome_proof
            - outcome_root_proof
            - block_header_lite
            - block_proof
        error:
          type: object
          properties:
            code:
              type: integer
            message:
              type: string
            data:
              type: object