CoinList Swap API

openapi: 3.0.0
info:
  title: Frontline DocumentSubmissions Swap API
  version: 0.1.0
servers:
- url: https://api.coinlist.co
  variables: {}
security: []
tags:
- name: Swap
paths:
  /v1/swap/output-token:
    get:
      callbacks: {}
      description: Resolves outputToken() on the Superstate swap contract and returns the ERC-20 name, symbol and decimals of that token.
      operationId: getSwapOutputToken
      parameters:
      - description: The swap contract address
        in: query
        name: contract_address
        required: true
        schema:
          example: '0x742d35cc6634c0532925a3b844bc9e7595f0beb1'
          type: string
          x-struct: null
          x-validate: null
      - description: The EVM chain to read from, e.g. ethereum_mainnet, ethereum_sepolia, base_mainnet or base_sepolia
        in: query
        name: chain
        required: true
        schema:
          example: ethereum_sepolia
          type: string
          x-struct: null
          x-validate: null
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SwapOutputToken'
          description: Successful response.
        default:
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Error response.
      security:
      - OAuth2: []
      summary: Get the swap contract's output token metadata
      tags:
      - Swap
  /v1/swap/preview:
    get:
      callbacks: {}
      description: 'Reads preview(inputToken, amount) on the Superstate swap contract and returns the quote: the input amount to pay, the fee charged on it and the output amount to receive.'
      operationId: getSwapPreview
      parameters:
      - description: The swap contract address
        in: query
        name: contract_address
        required: true
        schema:
          example: '0x742d35cc6634c0532925a3b844bc9e7595f0beb1'
          type: string
          x-struct: null
          x-validate: null
      - description: The EVM chain to read from, e.g. ethereum_mainnet, ethereum_sepolia, base_mainnet or base_sepolia
        in: query
        name: chain
        required: true
        schema:
          example: ethereum_sepolia
          type: string
          x-struct: null
          x-validate: null
      - description: The input token contract address
        in: query
        name: input_token
        required: true
        schema:
          example: '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48'
          type: string
          x-struct: null
          x-validate: null
      - description: Amount of the input token to swap, as a uint256 decimal string in the input token's smallest unit
        in: query
        name: amount
        required: true
        schema:
          example: '1000000'
          type: string
          x-struct: null
          x-validate: null
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SwapPreview'
          description: Successful response.
        default:
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Error response.
      security:
      - OAuth2: []
      summary: Preview a swap
      tags:
      - Swap
  /v1/swap/status:
    get:
      callbacks: {}
      description: Reads stopped() and SWAP_LEVEL() on the Superstate swap contract so clients can determine whether swaps are currently allowed.
      operationId: getSwapStatus
      parameters:
      - description: The swap contract address
        in: query
        name: contract_address
        required: true
        schema:
          example: '0x742d35cc6634c0532925a3b844bc9e7595f0beb1'
          type: string
          x-struct: null
          x-validate: null
      - description: The EVM chain to read from, e.g. ethereum_mainnet, ethereum_sepolia, base_mainnet or base_sepolia
        in: query
        name: chain
        required: true
        schema:
          example: ethereum_sepolia
          type: string
          x-struct: null
          x-validate: null
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SwapStatus'
          description: Successful response.
        default:
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Error response.
      security:
      - OAuth2: []
      summary: Get the swap contract's status
      tags:
      - Swap
components:
  schemas:
    SwapPreview:
      additionalProperties: false
      description: Quote for swapping an amount of an input token on a swap contract.
      properties:
        fee:
          description: Fee charged on the swap, as a uint256 decimal string in the input token's smallest unit
          example: '1000'
          type: string
          x-struct: null
          x-validate: null
        object:
          description: String representing the object's type. Objects of the same type share the same value.
          enum:
          - swap_preview
          type: string
          x-struct: null
          x-validate: null
        pay_input_amount:
          description: Amount of the input token to pay, as a uint256 decimal string in the input token's smallest unit
          example: '1000000'
          type: string
          x-struct: null
          x-validate: null
        receive_output_amount:
          description: Amount of the output token to receive, as a uint256 decimal string in the output token's smallest unit
          example: '999000'
          type: string
          x-struct: null
          x-validate: null
      required:
      - object
      - pay_input_amount
      - fee
      - receive_output_amount
      title: SwapPreview
      type: object
      x-struct: Elixir.FrontlineAPIWeb.OpenApi.Schemas.SwapPreview
      x-validate: null
    Error:
      additionalProperties: false
      properties:
        code:
          description: A human-readable message providing more details about the error.
          type: string
          x-struct: null
          x-validate: null
        errors:
          additionalProperties:
            items:
              type: string
              x-struct: null
              x-validate: null
            type: array
            x-struct: null
            x-validate: null
          type: object
          x-struct: null
          x-validate: null
        event_id:
          description: The unique identifier for the error event. This is useful for tracking and debugging.
          type: string
          x-struct: null
          x-validate: null
        message:
          description: For some errors that could be handled programmatically, a short string indicating the error code reported.
          type: string
          x-struct: null
          x-validate: null
        type:
          description: The type of error returned. One of `api_error`, `invalid_request_error`
          enum:
          - api_error
          - invalid_request_error
          type: string
          x-struct: null
          x-validate: null
      required:
      - type
      - message
      title: Error
      type: object
      x-struct: Elixir.FrontlineAPIWeb.OpenApi.Schemas.ApiError
      x-validate: null
    SwapStatus:
      additionalProperties: false
      description: Current status flags of a Superstate swap contract.
      properties:
        object:
          description: String representing the object's type. Objects of the same type share the same value.
          enum:
          - swap_status
          type: string
          x-struct: null
          x-validate: null
        stopped:
          description: The contract's stopped() bitmask as a uint256 decimal string. Zero means no functionality is stopped.
          example: '0'
          type: string
          x-struct: null
          x-validate: null
        swap_level:
          description: The contract's SWAP_LEVEL() flag as a uint256 decimal string
          example: '4'
          type: string
          x-struct: null
          x-validate: null
      required:
      - object
      - stopped
      - swap_level
      title: SwapStatus
      type: object
      x-struct: Elixir.FrontlineAPIWeb.OpenApi.Schemas.SwapStatus
      x-validate: null
    SwapOutputToken:
      additionalProperties: false
      description: ERC-20 metadata of a swap contract's output token.
      properties:
        decimals:
          description: ERC-20 token decimals
          example: 6
          type: integer
          x-struct: null
          x-validate: null
        name:
          description: ERC-20 token name
          example: USD Coin
          type: string
          x-struct: null
          x-validate: null
        object:
          description: String representing the object's type. Objects of the same type share the same value.
          enum:
          - swap_output_token
          type: string
          x-struct: null
          x-validate: null
        symbol:
          description: ERC-20 token symbol
          example: USDC
          type: string
          x-struct: null
          x-validate: null
      required:
      - object
      - name
      - symbol
      - decimals
      title: SwapOutputToken
      type: object
      x-struct: Elixir.FrontlineAPIWeb.OpenApi.Schemas.SwapOutputToken
      x-validate: null
  securitySchemes:
    OAuth2:
      description: OAuth 2.0 authorization and token endpoints
      flows:
        authorizationCode:
          authorizationUrl: /oauth/authorize
          refreshUrl: /oauth/token
          scopes: {}
          tokenUrl: /oauth/token
        clientCredentials:
          refreshUrl: /oauth/token
          scopes: {}
          tokenUrl: /oauth/token
      type: oauth2
    TokenAuth:
      description: Session token for user authentication during OAuth authorization
      scheme: bearer
      type: http