Feature: mock interpreter for testing

[wjmelements]

Usage

expected.json

This configuration file describes the contracts being tested, the external calls we expect and how we should mock their response, and most fields are optional.

[
    {
        "account": "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
        "construct": "exec.evm",
        "tests": [
            {
                "op": "CALL",
                "profile": "balanceOf",
                "gas": 31000,
                "output": "0x00000000000000000000000000000000000000000000000070a08231000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb480000000000000000000000000000000000000000000000000000000000000000"
            }
        ]
    },
    {
        "construct": "codecopy.evm",
        "tests": [
            {
                "op": "STATICCALL",
                "input": "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
                "output": "0x6370a08231595273a0b86991c6218b36c1d19d4a2e9eb0ce3606eb485952602059596000600073a0b86991c6218b36c1d19d4a2e9eb0ce3606eb485af1596000f3"
            }
        ]
    },
    {
        "account": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
        "mock": [
            {
                "op": "STATICCALL",
                "from": "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
                "input": "0x70a08231000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
                "output": "0x0000000000000000000000000000000000000000000000000000000000000000",
                "gas": 8000
            }
        ]
    }
]

Invoke

evm -t expected.json

Unless specified by the configuration, the output should be empty in the case that the tests behave as expected.

Output should include gas used selected by the configuration, probably something like

balanceOf 29512

[wjmelements]

I plan to bring in the gmp dependency to provide the biginteger type.

[wjmelements]

I have begun work on the interpreter branch

[wjmelements]

I plan to bring in the gmp dependency to provide the biginteger type.

instead I am using uint256_t.c from https://github.com/LedgerHQ/app-zilliqa/tree/develop/src