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OpenAPI Specification

openapi: 3.2.0
info:
  title: Transaction Estimate Fee API
  version: 1.0.0
  description: Blockdaemon transaction API to create, compile, send and verify transactions for supported blockchains.
  contact:
    name: Blockdaemon
    email: info@blockdaemon.com
    url: https://blockdaemon.com
  x-logo:
    url: https://storage.googleapis.com/blockdaemon-app-static-images/marketing/PNG/dark-logo.png
    altText: Blockdaemon logo
servers:
- url: https://svc.blockdaemon.com/tx/v1
  description: Blockdaemon transaction API
security:
- apiKeyAuthHeader: []
- bearerAuth: []
tags:
- name: Estimate Fee
paths:
  /{blockchain_id}/estimate_fee:
    parameters:
    - $ref: '#/components/parameters/blockchain_id'
    post:
      summary: Get the Fee Estimation
      description: Returns the estimated fee for a given chain.
      operationId: TxEstimateFee
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ApiTxEstimateFeeRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiTxEstimateFeeResponse'
        '401':
          $ref: '#/components/responses/ErrorUnauthorized'
        '429':
          $ref: '#/components/responses/ErrorTooManyRequests'
        '500':
          $ref: '#/components/responses/ErrorInternal'
        '501':
          $ref: '#/components/responses/ErrorNotImplemented'
        '503':
          $ref: '#/components/responses/ErrorServiceUnavailable'
      tags:
      - Estimate Fee
components:
  schemas:
    ApiTxEstimateFeeRequestTron:
      title: Api Tx Estimate Fee Request Tron
      type: object
      properties:
        tx:
          type: string
          description: the transaction in protobuf hex encoding
          x-oapi-codegen-extra-tags:
            validate: required
      required:
      - tx
    TronEnergyDistribution:
      type: object
      properties:
        sender_usage_percentage:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        contract:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        sender:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
    error:
      type: object
      properties:
        type:
          type: string
          description: The HTTP error type.
          example: bad-request
        code:
          type: integer
          description: The numeric error code.
          example: 16384
        title:
          type: string
          description: The short error description.
          example: Invalid Address
        status:
          type: integer
          description: The HTTP status of the error.
          example: 400
        detail:
          type: string
          description: Long error description
          example: The requested address is invalid on this protocol.
    ApiTxEstimateFeeResponseStellar:
      title: Api Tx Estimate Fee Response Stellar
      type: object
      properties:
        most_recent_block:
          type: integer
          x-go-type: big.Int
        estimated_fees:
          $ref: '#/components/schemas/ApiTxEstimateFeeStellar'
    ApiTxEstimateFeeStellar:
      title: Api Tx Estimate Fee Stellar
      type: object
      x-go-type-skip-optional-pointer: true
      properties:
        fast:
          type: integer
          x-go-type: big.Int
        medium:
          type: integer
          x-go-type: big.Int
        slow:
          type: integer
          x-go-type: big.Int
    ApiTxEstimateFeeRequest:
      anyOf:
      - $ref: '#/components/schemas/ApiTxEstimateFeeRequestTron'
      - $ref: '#/components/schemas/ApiTxEstimateFeeRequestStellar'
    ApiTxEstimateFeeResponse:
      anyOf:
      - $ref: '#/components/schemas/ApiTxEstimateFeeResponseTron'
      - $ref: '#/components/schemas/ApiTxEstimateFeeResponseStellar'
    ApiTxEstimateFeeRequestStellar:
      title: Api Tx Estimate Fee Request Stellar
      type: object
      properties:
        smart_contract:
          type: boolean
          description: Is the transaction interacting with smart contracts, transactions interacting with smart contracts compete separately from native transactions for more limited resources as a result they typically pay higher fees.
          default: false
          x-go-type-skip-optional-pointer: true
    TronSunFeeDetails:
      type: object
      properties:
        sun_for_energy:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        sun_for_contract_energy:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        sun_for_bandwidth:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        other:
          type: array
          items:
            type: object
            properties:
              fee:
                type: integer
                x-go-type: int64
                x-go-type-skip-optional-pointer: true
              contract_type:
                type: string
    ApiTxEstimateFeeResponseTron:
      title: Api Tx Estimate Fee Response Tron
      type: object
      properties:
        account_resources:
          $ref: '#/components/schemas/TronAccountResources'
        contract_resources:
          $ref: '#/components/schemas/TronAccountResources'
        estimated_cost:
          $ref: '#/components/schemas/TronAccountResources'
        estimated_energy:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        estimated_bandwidth:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        energy_distribution:
          $ref: '#/components/schemas/TronEnergyDistribution'
        sun_fee:
          $ref: '#/components/schemas/TronSunFeeDetails'
        estimated_tx_status:
          type: string
          enum:
          - success
          - failed
        error:
          type: string
      required:
      - account_resources
      - estimated_cost
      - estimated_energy
      - estimated_bandwidth
      - estimated_tx_status
    TronAccountResources:
      type: object
      properties:
        sun:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        free_bandwidth:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        bandwidth:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        energy:
          type: integer
          x-go-type: int64
          x-go-type-skip-optional-pointer: true
        contract_energy:
          type: integer
          x-go-type: int64
  parameters:
    blockchain_id:
      name: blockchain_id
      in: path
      required: true
      description: Either a hyphen seperated protocol-network pair like `ethereum-mainnet` or the `chain-id`
      schema:
        type: string
        default: ethereum-mainnet
  responses:
    ErrorTooManyRequests:
      description: Rate limit exceeded
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: too-many-requests
            title: Too Many Requests
            status: 429
            detail: Request rate limits have been exceeded. Try again after a few seconds.
    ErrorNotImplemented:
      description: The request endpoint is not implemented
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: not-implemented
            title: Not implemented
            status: 501
    ErrorUnauthorized:
      description: Invalid or expired token
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: unauthorized
            title: Invalid Token
            status: 401
    ErrorInternal:
      description: An internal server error happened
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: internal-server-error
            title: Internal Server Error
            status: 500
    ErrorServiceUnavailable:
      description: The resource you are trying to access is currently unavailable
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/error'
          example:
            type: unavailable
            title: Unavailable
            status: 503
  securitySchemes:
    apiKeyAuthHeader:
      type: apiKey
      in: header
      name: X-API-Key
      description: 'Unlock higher TPS - Create your own API key in the [Blockdaemon App](https://app.blockdaemon.com).

        '
      x-default: 2go1YqUcuAr4WZ2-3WgSD3c7qpatZqQuNWhTVBldKZnTSUtw
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: Opaque
      description: '[Legacy Auth] Unlock higher TPS - Create your own API key in the [Blockdaemon App](https://app.blockdaemon.com).

        '
      x-default: 2go1YqUcuAr4WZ2-3WgSD3c7qpatZqQuNWhTVBldKZnTSUtw
x-provenance:
  method: searched
  source: https://docs.blockdaemon.com/reference
  harvested: '2026-10-14'
  tool: harvest-readme-openapi.py
  note: Assembled verbatim from the OpenAPI definition ReadMe embeds in each operation page of the provider's developer portal; paths and components merged by API title, nothing authored.
  assembled_from:
  - https://docs.blockdaemon.com/reference/getoverview-txapi.md
  - https://docs.blockdaemon.com/reference/txcompile-txapi.md
  - https://docs.blockdaemon.com/reference/txcompileandsend-txapi.md
  - https://docs.blockdaemon.com/reference/txcreate-txapi.md
  - https://docs.blockdaemon.com/reference/txcreatetoken-txapi.md
  - https://docs.blockdaemon.com/reference/txdecode-txapi.md
  - https://docs.blockdaemon.com/reference/txderivesigningpayload.md
  - https://docs.blockdaemon.com/reference/txestimatefee-txapi.md
  - https://docs.blockdaemon.com/reference/txsend-txapi.md
  - https://docs.blockdaemon.com/reference/txverify-txapi.md
  merge:
    pages: 10
    deduped: 119
    conflicts_kept_first: 0