openapi: 3.1.0
info:
  title: 'NEAR Protocol RPC: Call Function'
  description: Call a contract method on a NEAR account
  version: 1.0.0
servers:
  - url: https://rpc.mainnet.fastnear.com
    description: Mainnet
  - url: https://rpc.testnet.fastnear.com
    description: Testnet
paths:
  /:
    post:
      operationId: call_function
      summary: Call contract function
      description: Execute a view method on a smart contract without modifying state
      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:
                    - query
                params:
                  type: object
                  properties:
                    account_id:
                      type: string
                      description: NEAR account ID
                    args_base64:
                      type: string
                      description: Base64-encoded method arguments
                    method_name:
                      type: string
                    request_type:
                      type: string
                      enum:
                        - call_function
                    finality:
                      type: string
                      enum:
                        - final
                        - optimistic
                      description: Block finality
                  required:
                    - request_type
                    - account_id
                    - method_name
                    - args_base64
                    - finality
            examples:
              mainnet:
                summary: Call Mainnet Contract Function
                value:
                  jsonrpc: '2.0'
                  id: fastnear
                  method: query
                  params:
                    request_type: call_function
                    finality: final
                    account_id: contract.near
                    method_name: get_info
                    args_base64: e30=
              testnet:
                summary: Call Testnet Contract Function
                value:
                  jsonrpc: '2.0'
                  id: fastnear
                  method: query
                  params:
                    request_type: call_function
                    finality: final
                    account_id: contract.testnet
                    method_name: get_info
                    args_base64: e30=
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcResponse'
components:
  schemas:
    JsonRpcResponse:
      type: object
      required:
        - jsonrpc
        - id
      properties:
        jsonrpc:
          type: string
          enum:
            - '2.0'
        id:
          oneOf:
            - type: string
            - type: number
        result:
          type: object
          description: A result returned by contract method
          properties:
            logs:
              type: array
              items:
                type: string
            result:
              type: array
              items:
                type: integer
                format: uint8
                minimum: 0
          required:
            - result
            - logs
        error:
          type: object
          properties:
            code:
              type: integer
            message:
              type: string
            data:
              type: object
