# Nanook

This is a Ruby library for managing a [nano currency](https://nano.org/) node, including making and receiving payments, using the [nano RPC protocol](https://docs.nano.org/commands/rpc-protocol). Nano is a fee-less, fast, environmentally-friendly cryptocurrency. It's awesome. See [https://nano.org](https://nano.org/).

[![Gem Version](https://badge.fury.io/rb/nanook.svg)](https://badge.fury.io/rb/nanook)
[![CircleCI](https://circleci.com/gh/lukes/nanook/tree/master.svg?style=shield)](https://circleci.com/gh/lukes/nanook/tree/master)


## Installation

Add this line to your application's Gemfile:

```ruby
gem 'nanook'
```

And then execute:

    $ bundle

Or install it yourself as:

    $ gem install nanook

# Getting Started

## Initializing

Nanook will by default connect to `http://[::1]:7076`.

```ruby
nanook = Nanook.new
```

To connect to another host instead:

```ruby
nanook = Nanook.new("http://localhost:7076")
```

## Basics

### Working with wallets and accounts

Create a wallet:

```ruby
wallet = nanook.wallet.create
```

Create an account within a wallet:

```ruby
account = wallet.account.create
```

List accounts within a wallet:

```ruby
accounts = wallet.accounts
```

### Sending a payment

To send a payment from an account in a wallet:

```ruby
account = nanook.wallet(wallet_id).account(account_id)
account.pay(to: recipient_account_id, amount: 0.2, id: unique_id)
```

Or, a wallet:

```ruby
wallet = nanook.wallet(wallet_id)
wallet.pay(from: your_account_id, to: recipient_account_id, amount: 0.2, id: unique_id)
```

The `id` can be any string and needs to be unique per payment. It serves an important purpose; it allows you to make this call multiple times with the same `id` and be reassured that you will only ever send that nano payment once. From the [Nano RPC](https://docs.nano.org/commands/rpc-protocol/#send):

> You can (and should) specify a unique id for each spend to provide idempotency. That means that if you [make the payment call] two times with the same id, the second request won't send any additional Nano.

The unit of the `amount` is NANO (which is currently technically Mnano — see [What are Nano's Units](https://docs.nano.org/protocol-design/distribution-and-units/#unit-dividers)). You can pass an amount of raw instead by adding the `unit: :raw` argument:

```ruby
account.pay(to: recipient_account_id, amount: 999, unit: :raw, id: unique_id)
```

Note, there may be a delay in receiving a response due to Proof of Work being done. From the [Nano RPC](https://docs.nano.org/commands/rpc-protocol/#send):

> Proof of Work is precomputed for one transaction in the background. If it has been a while since your last transaction it will send instantly, the next one will need to wait for Proof of Work to be generated.

### Receiving a payment

The simplest way to receive a payment is:

```ruby
account = nanook.wallet(wallet_id).account(account_id)
account.receive

# or:

wallet = nanook.wallet(wallet_id)
wallet.receive(into: account_id)
```

The `receive` method when called as above will receive the latest pending payment for an account in a wallet. It will either return a block hash if a payment was received, or `false` if there were no pending payments to receive.

You can also receive a specific pending block if you know it (you may have discovered it through calling `account.pending` for example):

```ruby
account = nanook.wallet(wallet_id).account(account_id)
account.receive(block_id)

# or:

wallet = nanook.wallet(wallet_id)
wallet.receive(block_id, into: account_id)
```

## Exploring further

Read the [Using Nanook](https://github.com/lukes/nanook/wiki/Using-nanook) page for some example uses of Nanook to query the network.

## All commands

Below is a quick reference list of commands. See the [full Nanook documentation](https://lukes.github.io/nanook/3.1.0/) for a searchable detailed description of every class and method, what the arguments mean, and example responses.

### Wallets

See the [full documentation for Nanook::Wallet](https://lukes.github.io/nanook/3.1.0/Nanook/Wallet.html) for a detailed description of each method and example responses.

#### Create wallet:

```ruby
nanook.wallet.create
```
#### Restoring a wallet from a seed

```ruby
nanook.wallet.restore(seed)
```
Optionally also restore the wallet's accounts:
```ruby
nanook.wallet.restore(seed, accounts: 2)
```

#### Working with a wallet:

```ruby
wallet = nanook.wallet(wallet_id)

wallet.balance
wallet.balance(account_break_down: true)
wallet.balance(unit: :raw)
wallet.pay(from: your_account_id, to: recipient_account_id, amount: 2, id: unique_id)
wallet.pay(from: your_account_id, to: recipient_account_id, amount: 2, id: unique_id, unit: :raw)
wallet.pending
wallet.pending(limit: 1)
wallet.pending(detailed: true)
wallet.pending(unit: :raw)
wallet.receive(into: account_id)
wallet.receive(pending_block_id, into: account_id)
wallet.search_pending

wallet.account.create
wallet.account.create(5)
wallet.accounts
wallet.contains?(account_id)
wallet.move_accounts(from_wallet_id, [account_1_id, account_2_id])
wallet.remove_account(account_id)

wallet.default_representative
wallet.change_default_representative(representative_account_id)
wallet.change_password(password)
wallet.exists?
wallet.history
wallet.history(unit: :raw)
wallet.info
wallet.info(unit: :raw)
wallet.export
wallet.ledger
wallet.ledger(unit: :raw)
wallet.lock
wallet.locked?
wallet.republish_blocks
wallet.republish_blocks(limit: 5)
wallet.unlock(password)
wallet.work

wallet.destroy
```
### Accounts

#### Create account:

```ruby
nanook.wallet(wallet_id).account.create
```

#### Create multiple accounts:

```ruby
nanook.wallet(wallet_id).account.create(5)
```

#### Working with an account:

Any account on the Nano network that is known by your node can be initialized through `Nanook#account`:

```ruby
account = nanook.account(account_id)
```

See the [full documentation for Nanook::Account](https://lukes.github.io/nanook/3.1.0/Nanook/Account.html) for a detailed description of each method and example responses.

```ruby
account.balance
account.balance(unit: :raw)
account.pending
account.pending(limit: 1)
account.pending(detailed: true)
account.pending(unit: :raw)

account.blocks
account.blocks(limit: 1)
account.blocks(sort: :desc)
account.delegators
account.delegators(unit: :raw)
account.delegators_count
account.exists?
account.history
account.history(limit: 1)
account.history(unit: :raw)
account.history(sort: :desc)
account.info
account.info(unit: :raw)
account.last_modified_at
account.ledger
account.ledger(limit: 10)
account.ledger(modified_since: Time.now)
account.ledger(unit: :raw)
account.ledger(sort: :desc)
account.open_block
account.public_key
account.representative
account.weight
account.weight(unit: :raw)
```

#### Working with an account created on the node:

Accounts that have been created on your node can have
additional methods when initialized through `Nanook::Wallet#account`:

```ruby
wallet = nanook.wallet(wallet_id)
account = wallet.account(account_id)
```

As well as the following methods, all methods of [regular accounts](#working-with-any-account) can also be called.

See the [full documentation for Nanook::WalletAccount](https://lukes.github.io/nanook/3.1.0/Nanook/WalletAccount.html) for a detailed description of each method and example responses.

```ruby
account.pay(to: recipient_account_id, amount: 2, id: unique_id)
account.pay(to: recipient_account_id, amount: 2, id: unique_id, unit: :raw)
account.receive
account.receive(pending_block_id)
account.change_representative(new_representative)
account.set_work(work)
account.work
account.destroy
```

### Blocks

See the [full documentation for Nanook::Block](https://lukes.github.io/nanook/3.1.0/Nanook/Block.html) for a detailed description of each method and example responses.

```ruby
block = nanook.block(block_id)

block.account
block.amount
block.amount(unit: :raw)
block.ancestors
block.ancestors(limit: 10)
block.ancestors(offset: 10)
block.balance
block.change?
block.checked?
block.confirm
block.descendants
block.descendants(limit: 10)
block.descendants(offset: 10)
block.epoch?
block.exists?
block.exists?(allow_unchecked: true)
block.height
block.info                        # Verified blocks in the ledger
block.info(allow_unchecked: true) # Verified blocks AND unchecked synchronizing blocks
block.info(unit: :raw)
block.next
block.open?
block.pending?
block.previous
block.receive?
block.representative
block.republish
block.republish(sources: 2)
block.republish(destinations: 2)
block.send?
block.signature
block.timestamp
block.type
block.unchecked?
block.work

block.generate_work
block.generate_work(use_peers: true)
block.cancel_work
block.valid_work?(work)
```

### Managing your nano node

See the [full documentation for Nanook::Node](https://lukes.github.io/nanook/3.1.0/Nanook/Node.html) for a detailed description of each method and example responses.

```ruby
node = nanook.node

node.account_count
node.block_count
node.bootstrap(address: "::ffff:138.201.94.249", port: 7075)
node.bootstrap_any
node.bootstrap_lazy(block_id)
node.bootstrap_lazy(block_id, force: true)
node.confirmation_quorum
node.difficulty
node.difficulty(include_trend: true)
node.keepalive(address: "::ffff:138.201.94.249", port: 7075)
node.peers
node.receive_minimum
node.receive_minimum(unit: :raw)
node.change_receive_minimum(amount)
node.change_receive_minimum(amount, unit: :raw)
node.representatives
node.representatives(unit: :raw)
node.representatives_online
node.search_pending
node.synchronizing_blocks
node.synchronizing_blocks(limit: 1)
node.sync_progress
node.version

node.stop
```

### Work peers

```ruby
work_peers = nanook.work_peers

work_peers.add(address: "::ffff:172.17.0.1:7076", port: 7076)
work_peers.clear
work_peers.list
```

### Keys

#### Create private public key pair:

```ruby
private_key = nanook.private_key.create
private_key = nanook.private_key.create(seed: seed, index: 0)
private_key.public_key # => Nanook::PublicKey
```

#### Working with a private key

```ruby
key = nanook.private_key(private_key)

key.account
key.public_key
```

#### Working with a public key

```ruby
key = nanook.public_key(public_key)

key.account
```

### Network

A summarized overview of the Nano network:

```ruby
nanook.network_telemetry
```

## Nanook Metal

You can do any call listed in the [Nano RPC](https://docs.nano.org/commands/rpc-protocol) directly through the `rpc` method. The first argument should match the `action` of the RPC call, and then all remaining parameters are passed in as arguments.

E.g., the [accounts_create command](https://docs.nano.org/commands/rpc-protocol/#accounts_create) can be called like this:

```ruby
nanook.rpc.call(:accounts_create, wallet: wallet_id, count: 2)
```

## Contributing

Bug reports and pull requests are welcome. Pull requests with passing tests are even better.

To run the test suite:

    bundle exec rspec spec

To update the yard documentation:

    bundle exec rake yard

## License

The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

## Buy me a nano coffee

This library is always free to use, but feel free to send some nano [my way](https://www.nanode.co/account/nano_3c3ek3k8135f6e8qtfy8eruk9q3yzmpebes7btzncccdest8ymzhjmnr196j) if you'd like to!

    nano_3c3ek3k8135f6e8qtfy8eruk9q3yzmpebes7btzncccdest8ymzhjmnr196j

![alt nano_3c3ek3k8135f6e8qtfy8eruk9q3yzmpebes7btzncccdest8ymzhjmnr196j](https://raw.githubusercontent.com/lukes/nanook/master/img/qr.png)