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latestOpenAPI 3.1.02026-07-243035381.4 MB
Cardano - Rosetta

call

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.

post/call

Request body

methodstring required

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.

parametersobject required

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 request

{
  "network_identifier": {
    "blockchain": "bitcoin",
    "network": "mainnet",
    "sub_network_identifier": {
      "network": "shard 1",
      "metadata": {
        "producer": "0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5"
      }
    }
  },
  "method": "eth_call",
  "parameters": {
    "block_number": 23,
    "address": "0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5"
  }
}

Response

Expected response to a valid request

resultobject required

Result contains the result of the /call invocation. This result will not be inspected or interpreted by Rosetta tooling and is left to the caller to decode.

idempotentboolean required

Idempotent indicates that if /call is invoked with the same CallRequest again, at any point in time, it will return the same CallResponse.

Integrators may cache the CallResponse if this is set to true to avoid making unnecessary calls to the Rosetta implementation. For this reason, implementers should be very conservative about returning true here or they could cause issues for the caller.

Example response

{
  "result": {
    "count": 1000
  }
}