Dfns

Dfns Networks API

Network fee estimates and read-only blockchain calls.

Documentation GitHub OpenAPI

Operations 2

GET /networks/fees Estimate network fees #

POST /networks/{network}/call-function Read from a smart contract (call function) #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Dfns Networks API
  description: Representative OpenAPI description of the Dfns wallet-as-a-service and MPC key-management REST API.
  contact:
    name: Dfns Support
    url: https://www.dfns.co/
  termsOfService: https://www.dfns.co/terms-of-service
  version: '1.0'
servers:
- url: https://api.dfns.io
  description: Dfns production REST API (Europe / default)
- url: https://api.uae.dfns.io
  description: Dfns production REST API (UAE region)
security:
- BearerAuth: []
  AppId: []
tags:
- name: Networks
  description: Network fee estimates and read-only blockchain calls.
paths:
  /networks/fees:
    get:
      operationId: getNetworkFees
      tags:
      - Networks
      summary: Estimate network fees
      description: Returns a current fee estimate (e.g. EIP-1559 maxFeePerGas / maxPriorityFeePerGas) for a given blockchain network.
      parameters:
      - in: query
        name: network
        required: true
        schema:
          type: string
      responses:
        '200':
          description: The fee estimate for the network.
          content:
            application/json:
              schema:
                type: object
                properties:
                  network:
                    type: string
                  kind:
                    type: string
                  estimatedFees:
                    type: object
  /networks/{network}/call-function:
    post:
      operationId: callFunction
      tags:
      - Networks
      summary: Read from a smart contract (call function)
      description: Performs a read-only (eth_call style) function call against a contract on a network without creating a transaction.
      parameters:
      - in: path
        name: network
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - kind
              - contract
              - data
              properties:
                kind:
                  type: string
                  example: Evm
                contract:
                  type: string
                data:
                  type: string
      responses:
        '200':
          description: The decoded/raw contract read result.
          content:
            application/json:
              schema:
                type: object
                properties:
                  kind:
                    type: string
                  data:
                    type: string
components:
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'Access token issued to a service account or a logged-in user. Sent as `Authorization: Bearer <token>`.'
    AppId:
      type: apiKey
      in: header
      name: X-DFNS-APPID
      description: The Dfns application (app) id the request is made on behalf of.
    UserAction:
      type: apiKey
      in: header
      name: X-DFNS-USERACTION
      description: A User Action Signature token proving the caller cryptographically signed the request payload. Required on sensitive mutating operations (transfers, signature generation, key/policy/permission changes).