Add dev testnet.

[dvc94ch]

Makes it easier to test stuff by adding support for running a local testnet.

[dvc94ch]

ping @GeekArthur. sorry never written any go before. did I do something incredibly stupid? I think this is a really useful patch for people building apps that use the rosetta api.

[xiaying-peng]

How do you connect Rosetta to your local testnet? Do you use run-testnet-remote?

[GeekArthur]

@dvc94ch I think it makes sense to me to enable geth developer mode for dApp development or smart contract development. The majority of current rosetta usage is around blockchain integration, I believe that's why we don't have dev mode as we need to leverage the large amount of data from pre-existing public network for validating the implementation of rosetta API

[dvc94ch]

How do you connect Rosetta to your local testnet? Do you use run-testnet-remote?

I repurposed the TESTNET configuration which was previously an alias for ROPSTEN. Since it's not clear to me why ropsten is the testnet. If something were the testnet I'd think it would be a local testnet. Maybe there is something special about ropsten that makes it stand out as the default testnet.

To answer your question, you can test it using the command sequence below:

make build-local
make run-testnet-online
geth attach http://127.0.0.1:8545
> eth.sendTransaction({from: eth.coinbase, to: "0x0000011111222223333344444555556666677777", value: web3.toWei(50, "ether")})

[dvc94ch]

not a very exciting feature I guess. any estimate when you'll find time to review it?

[GeekArthur]

The PR LGTM, @xiaying-peng you can review again to see if it addresses your previous comments

[dvc94ch]

If someone could reapprove so ci can run, that would be great

[dvc94ch]

can we merge this?