Transition Tool

For those clients that are unable to implement RPC Methods to connect with retesteth there is a new state transition generation approach.

The client can implement a state transition tool based on following example inputs/outputs:
https://github.com/holiman/go-ethereum/tree/state_t8n_tool/cmd/evm/testdata

Recent t8ntool format
https://ethereum-tests.readthedocs.io/en/latest/t8ntool-ref.html?highlight=t8ntool

Here is the geth implementation interface help:

statet8n --help
transition [command options] [arguments...]

OPTIONS:
   --trace                            Output full trace logs to files <txhash>.jsonl
   --trace.nomemory                   Disable full memory dump in traces
   --trace.nostack                    Disable stack output in traces
   --output.alloc alloc               Determines where to put the alloc of the post-state.
                                      `stdout` - into the stdout output
                                      `stderr` - into the stderr output
                                      <file> - into the file <file>  (default: "alloc.json")
   --output.result result             Determines where to put the result (stateroot, txroot etc) of the post-state.
                                      `stdout` - into the stdout output
                                      `stderr` - into the stderr output
                                      <file> - into the file <file>  (default: "result.json")
   --input.alloc stdin                stdin or file name of where to find the prestate alloc to use. (default: "alloc.json")
   --input.env stdin                  stdin or file name of where to find the prestate env to use. (default: "env.json")
   --input.txs stdin                  stdin or file name of where to find the transactions to apply. (default: "txs.json")
   --state.fork value                 Name of ruleset to use.
                                      Available forknames:
                                          Byzantium
                                          Constantinople
                                          ConstantinopleFix
                                          EIP150
                                          EIP158
                                          Frontier
                                          Homestead
                                          HomesteadToDaoAt5
                                          Istanbul
                                          YOLOv1
                                      Available extra eips:
                                          1344, 1884, 2200, 2315
                                      Syntax <forkname>(+ExtraEip) (default: "Istanbul")
   --state.chainid value              ChainID to use (default: 1)
   --state.reward value               Mining reward. Set to -1 to disable (default: 0)
   --verbosity value                  sets the verbosity level (default: 3)

Retesteth can execute this tool converting existing tests into the inputs, and read outputs from the tool to generate a new test case, or to check if the existing test case is running correctly with the tool.

To connect retesteth with the tool there is a new config type in .retesteth/t8ntool configuration folder. by default retesteth seek the statet8n tool in the system /bin/statet8n folder. Place your tool implementation there and run retesteth with following flag -- clients "t8ntool"