Call

Make a Network-Specific Procedure Call

post

Call invokes an arbitrary, network-specific procedure call with network-specific parameters. The guidance for what this endpoint should or could do is purposely left vague. In Ethereum, this could be used to invoke eth_call to implement an entire Rosetta API interface for some smart contract that is not parsed by the implementation creator (like a DEX). This endpoint could also be used to provide access to data that does not map to any Rosetta models instead of requiring an integrator to use some network-specific SDK and call some network-specific endpoint (like surfacing staking parameters). Call is NOT a replacement for implementing Rosetta API endpoints or mapping network-specific data to Rosetta models. Rather, it enables developers to build additional Rosetta API interfaces for things they care about without introducing complexity into a base-level Rosetta implementation. Simply put, imagine that the average integrator will use layered Rosetta API implementations that each surfaces unique data.

Authorizations
Body

CallRequest is the input to the /call endpoint.

methodstringRequired

Method is some network-specific procedure call. This method could map to a network-specific RPC endpoint, a method in an SDK generated from a smart contract, or some hybrid of the two. The implementation must define all available methods in the Allow object. However, it is up to the caller to determine which parameters to provide when invoking /call.

Example: eth_call
parametersobjectRequired

Parameters is some network-specific argument for a method. It is up to the caller to determine which parameters to provide when invoking /call.

Example: {"block_number":23,"address":"0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5"}
Responses
200
Expected response to a valid request
application/json
post
POST /call HTTP/1.1
Host: ada.nownodes.io
api-key: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 291

{
  "network_identifier": {
    "blockchain": "cardano",
    "network": "mainnet",
    "sub_network_identifier": {
      "network": "shard 1",
      "metadata": {
        "producer": "0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5"
      }
    }
  },
  "method": "eth_call",
  "parameters": {
    "block_number": 23,
    "address": "0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5"
  }
}
{
  "result": {
    "count": 1000
  },
  "idempotent": true
}
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