Daemon framework

[austinabell]

• Implements basic daemon framework, to be connected to start the tendermint node when Implement Init & ExportGenesis #64 is implemented

Current workflow to set up the chain using the daemon (and cli):

$  emintd init test --chain-id ethermint
{
  "moniker": "test",
  "chain_id": "ethermint",
  "node_id": "7df2f2687ad8690792076f366828d0bc8833b98e",
  "gentxs_dir": "",
  "app_message": {
    "ethermint": {
      "accounts": []
    },
    "staking": {
      "params": {
        "unbonding_time": "259200000000000",
        "max_validators": 100,
        "max_entries": 7,
        "bond_denom": "stake"
      },
      "last_total_power": "0",
      "last_validator_powers": null,
      "validators": null,
      "delegations": null,
      "unbonding_delegations": null,
      "redelegations": null,
      "exported": false
    },
    "slashing": {
      "params": {
        "max_evidence_age": "120000000000",
        "signed_blocks_window": "100",
        "min_signed_per_window": "0.500000000000000000",
        "downtime_jail_duration": "600000000000",
        "slash_fraction_double_sign": "0.050000000000000000",
        "slash_fraction_downtime": "0.010000000000000000"
      },
      "signing_infos": {},
      "missed_blocks": {}
    },
    "distribution": {
      "fee_pool": {
        "community_pool": []
      },
      "community_tax": "0.020000000000000000",
      "base_proposer_reward": "0.010000000000000000",
      "bonus_proposer_reward": "0.040000000000000000",
      "withdraw_addr_enabled": true,
      "delegator_withdraw_infos": [],
      "previous_proposer": "",
      "outstanding_rewards": [],
      "validator_accumulated_commissions": [],
      "validator_historical_rewards": [],
      "validator_current_rewards": [],
      "delegator_starting_infos": [],
      "validator_slash_events": []
    },
    "accounts": [],
    "genutil": {
      "gentxs": null
    },
    "bank": {
      "send_enabled": true
    },
    "params": null,
    "auth": {
      "params": {
        "max_memo_characters": "256",
        "tx_sig_limit": "7",
        "tx_size_cost_per_byte": "10",
        "sig_verify_cost_ed25519": "590",
        "sig_verify_cost_secp256k1": "1000"
      }
    }
  }
}
$  emintcli keys add austin
override the existing name austin [y/N]: y
Enter a passphrase to encrypt your key to disk:
Repeat the passphrase:

- name: austin
  type: local
  address: cosmos1w94eq0mmdxnc820ucapesyxm3upzgdd3f46qxm
  pubkey: cosmospub1addwnpepq22djc2ujh7yj40t0e36vufp89w5a7yfq9cd99sy3y2c0ed4xsht22ut52k
  mnemonic: ""
  threshold: 0
  pubkeys: []

$  emintd add-genesis-account $(emintcli keys show austin -a) 1000photon,100000000stake
$  emintd gentx --name austin
Password to sign with 'austin':
Genesis transaction written to "/Users/austinabell/.emintd/config/gentx/gentx-7df2f2687ad8690792076f366828d0bc8833b98e.json"
$  emintd validate-genesis
validating genesis file at /Users/austinabell/.emintd/config/genesis.json
File at /Users/austinabell/.emintd/config/genesis.json is a valid genesis file

Commands include:

Ethermint App Daemon (server)

Usage:
  emintd [command]

Available Commands:
  init                Initialize private validator, p2p, genesis, and application configuration files
  collect-gentxs      Collect genesis txs and output a genesis.json file
  gentx               Generate a genesis tx carrying a self delegation
  validate-genesis    validates the genesis file at the default location or at the location passed as an arg
  add-genesis-account Add genesis account to genesis.json
  help                Help about any command

Flags:
  -h, --help          help for emintd
      --home string   directory for config and data (default "/Users/austinabell/.emintd")
      --trace         print out full stack trace on errors

Which the final daemon cobra commands for:

  start               Run the full node
  unsafe-reset-all    Resets the blockchain database, removes address book files, and resets priv_validator.json to the genesis state

  tendermint          Tendermint subcommands
  export              Export state to JSON

  version             Print the app version

will come from:

	// TODO: Add export app state and TM validators commands
	// server.AddCommands(ctx, cdc, rootCmd, newApp, exportAppStateAndTMValidators)

When #64 is completed and the ethermint app framework is finished to make the exportAppStateAndTMValidators function that is commented out implementable