什么是 OpenRPC 规范？

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openrpc: 1.3.2
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info:
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  title: Calculator API
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  version: 1.0.0
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  description: |
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    A simple calculator API that performs basic arithmetic operations
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    using JSON-RPC 2.0 protocol.
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servers:
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  - name: production
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    url: https://api.calculator.com/rpc
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    description: Production JSON-RPC server
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  - name: development  
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    url: http://localhost:8080/rpc
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    description: Development server
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methods:
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  - name: add
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    summary: Add two numbers
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    description: Performs addition of two numeric values
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    params:
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      - name: a
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        schema:
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          type: number
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        required: true
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        description: First number to add
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      - name: b
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        schema:
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          type: number
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        required: true
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        description: Second number to add
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    result:
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      name: sum
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      schema:
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        type: number
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      description: The sum of the two numbers
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    examples:
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      - name: AddExample
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        description: Example of adding two numbers
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        params:
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          a: 5
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          b: 3
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        result: 8
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  - name: divide
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    summary: Divide two numbers
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    description: Performs division of two numeric values
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    params:
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      - name: dividend
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        schema:
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          type: number
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        required: true
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        description: Number to be divided
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      - name: divisor
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        schema:
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          type: number
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        required: true
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        description: Number to divide by
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    result:
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      name: quotient
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      schema:
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        type: number
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      description: The result of the division
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    errors:
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      - code: -32602
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        message: Division by zero
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        data:
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          type: object
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          properties:
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            error:
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              type: string
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              const: "Cannot divide by zero"
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    examples:
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      - name: DivideExample
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        description: Example of dividing two numbers
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        params:
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          dividend: 10
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          divisor: 2
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        result: 5
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  - name: notify_calculation
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    summary: Notify about calculation
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    description: Send a notification about a completed calculation (no response expected)
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    params:
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      - name: operation
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        schema:
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          type: string
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          enum: [add, subtract, multiply, divide]
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        required: true
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      - name: result
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        schema:
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          type: number
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        required: true
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      - name: timestamp
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        schema:
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          type: string
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          format: date-time
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        required: true
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components:
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  schemas:
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    CalculationRequest:
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      type: object
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      properties:
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        operation:
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          type: string
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          enum: [add, subtract, multiply, divide]
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        operands:
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          type: array
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          items:
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            type: number
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          minItems: 2
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          maxItems: 2
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        precision:
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          type: integer
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          minimum: 0
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          maximum: 10
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          default: 2
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      required:
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        - operation
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        - operands
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    CalculationResult:
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      type: object
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      properties:
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        result:
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          type: number
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        operation:
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          type: string
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        timestamp:
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          type: string
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          format: date-time
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      required:
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        - result
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        - operation
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        - timestamp