CoinList Token API

openapi: 3.0.0
info:
  title: Frontline DocumentSubmissions Token API
  version: 0.1.0
servers:
- url: https://api.coinlist.co
  variables: {}
security: []
tags:
- name: Token
paths:
  /v1/token/allowance:
    get:
      callbacks: {}
      description: Reads allowance(owner, spender) on the ERC-20 token contract. Can be used to determine whether an approval transaction is needed before a swap or token sale.
      operationId: getTokenAllowance
      parameters:
      - description: The ERC-20 token contract address
        in: query
        name: token_address
        required: true
        schema:
          example: '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48'
          type: string
          x-struct: null
          x-validate: null
      - description: The address owning the tokens
        in: query
        name: owner
        required: true
        schema:
          example: '0x8ba1f109551bd432803012645ac136ddd64dba72'
          type: string
          x-struct: null
          x-validate: null
      - description: The address allowed to spend the tokens
        in: query
        name: spender
        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/TokenAllowance'
          description: Successful response.
        default:
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Error response.
      security:
      - OAuth2: []
      summary: Get the on-chain ERC-20 allowance for a token, owner and spender
      tags:
      - Token
  /v1/token/balance:
    get:
      callbacks: {}
      description: Reads balanceOf(owner) on the ERC-20 token contract. Used to display the balance of the connected wallet the user will pay with.
      operationId: getTokenBalance
      parameters:
      - description: The ERC-20 token contract address
        in: query
        name: token_address
        required: true
        schema:
          example: '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48'
          type: string
          x-struct: null
          x-validate: null
      - description: The address owning the tokens
        in: query
        name: owner
        required: true
        schema:
          example: '0x8ba1f109551bd432803012645ac136ddd64dba72'
          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/TokenBalance'
          description: Successful response.
        default:
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Error response.
      security:
      - OAuth2: []
      summary: Get the on-chain ERC-20 balance of an address
      tags:
      - Token
components:
  schemas:
    TokenBalance:
      additionalProperties: false
      description: Current on-chain ERC-20 balance of an owner address.
      properties:
        balance:
          description: The balance as a uint256 decimal string in the token's smallest unit
          example: '1000000'
          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:
          - token_balance
          type: string
          x-struct: null
          x-validate: null
      required:
      - object
      - balance
      title: TokenBalance
      type: object
      x-struct: Elixir.FrontlineAPIWeb.OpenApi.Schemas.TokenBalance
      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
    TokenAllowance:
      additionalProperties: false
      description: Current on-chain ERC-20 allowance for a token, owner and spender.
      properties:
        allowance:
          description: The allowance as a uint256 decimal string in the token's smallest unit
          example: '1000000'
          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:
          - token_allowance
          type: string
          x-struct: null
          x-validate: null
      required:
      - object
      - allowance
      title: TokenAllowance
      type: object
      x-struct: Elixir.FrontlineAPIWeb.OpenApi.Schemas.TokenAllowance
      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