eth_call method

[0xp3gasus]

Description

• New RPC method call for ETH created.
• Bug fix when running Connector inside docker

Fixes #100

Dependencies (if any)

None

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

How Has This Been Tested?

• Test A

A sample Smart contract has been deployed to Regtest network in ETH, then, new RPC method has been executed to call the getMessage function of the contract

Contract code

//SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.11;

contract SampleContract {
    bytes32 message;
    constructor(bytes32 myMessage){
        message = myMessage;
    }
    function getMessage() public view returns(bytes32){
        return message;
    }
}

Deployment code

var argHex = web3.utils.asciiToHex("Hello world");
var deployContractTx = SampleContract.deploy(
    {
        data: bytecode,
        arguments: [argHex]
    }
);

New RPC method execution

curl --location --request POST 'http://localhost:80/eth/regtest/rpc' \
--header 'Content-Type: application/json' \
--data-raw '{
    "id": 1616785946469,
    "method": "call",
    "params": {
        "transaction": {
            "to": "0x976F996Aea68Fd7C07CADb632ab60eD95753f5C4",
            "data": "0xce6d41de"
        },
        "blockNumber": "latest"
    },
    "jsonrpc": "2.0"
}'

{
    "id": 1616785946469,
    "jsonrpc": "2.0",
    "result": {
        "data": "0x48656c6c6f20776f726c64000000000000000000000000000000000000000000"
    }
}

Data response decoded: Hello world

Test Configuration:

• Operating system (output of cat sw_vers): macOS 12.0.1
• Kernel version (output of uname -sr): Darwin 21.1.0
• Architecture (output of uname -m): x86_64

Related PR or Docs PR

Docs PR related # None Other PR related # None

Good practices to consider

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules