Class: Nanook::Block
Overview
The Nanook::Block
class contains methods to discover publicly-available information about blocks on the nano network.
A block is represented by a unique id like this:
"FBF8B0E6623A31AB528EBD839EEAA91CAFD25C12294C46754E45FD017F7939EB"
Initialize this class through the convenient Nanook#block method:
nanook = Nanook.new
block = nanook.block("FBF8B0E...")
Or compose the longhand way like this:
rpc_conn = Nanook::Rpc.new
block = Nanook::Block.new(rpc_conn, "FBF8B0E...")
Constant Summary
Constants included from Util
Instance Method Summary collapse
-
#==(other) ⇒ Boolean
(also: #eql?)
True if blocks are equal.
-
#account ⇒ Nanook::Account
Returns the Account of the block.
-
#amount(unit: Nanook.default_unit) ⇒ Float
Returns the amount of the block.
-
#ancestors(limit: 1000, offset: 0) ⇒ Object
(also: #chain)
Returns a consecutive list of block hashes in the account chain from (but not including) block back to
count
(direction from frontier back to open block, from newer blocks to older). -
#balance(unit: Nanook.default_unit) ⇒ Float
Returns the balance of the account at the time the block was created.
-
#cancel_work ⇒ Boolean
Stop generating work for a block.
-
#change? ⇒ Boolean
Returns true if block is type “change” (change of representative).
-
#confirm ⇒ Boolean
Request confirmation for a block from online representative nodes.
-
#confirmed? ⇒ Boolean
(also: #checked?)
Returns true if block is confirmed.
-
#descendants(limit: 1000, offset: 0) ⇒ Array<Nanook::Block>
(also: #successors)
Returns an Array of block hashes in the account chain from (but not including) this block up to
count
(direction from open block up to frontier, from older blocks to newer). -
#epoch? ⇒ Boolean
Returns true if block is type “epoch”.
-
#exists?(allow_unchecked: false) ⇒ Boolean
Returns true if block exists in the node's ledger.
-
#generate_work(use_peers: false) ⇒ String
Generate work for a block.
-
#hash ⇒ Integer
The hash value is used along with #eql? by the Hash class to determine if two objects reference the same hash key.
-
#height ⇒ Integer
Returns the height of the block.
-
#id ⇒ String
Returns the block hash id.
-
#info(allow_unchecked: false, unit: Nanook.default_unit) ⇒ Object
Returns a Hash of information about the block.
-
#initialize(rpc, block) ⇒ Block
constructor
A new instance of Block.
-
#next ⇒ Nanook::Block
Returns the Block of the next (newer) block in the account chain.
-
#open? ⇒ Boolean
Returns true if block is type “open”.
-
#pending?(allow_unconfirmed: false) ⇒ Boolean
Returns true if block is a pending block.
-
#previous ⇒ Nanook::Block
Returns the Block of the previous (older) block in the account chain.
-
#receive? ⇒ Boolean
Returns true if block is type “receive”.
-
#representative ⇒ Nanook::Account
Returns the Account of the block representative.
-
#republish(destinations: nil, sources: nil) ⇒ Array<Nanook::Block>
Republish blocks starting at this block up the account chain back to the nano network.
-
#send? ⇒ Boolean
Returns true if block is type “send”.
-
#signature ⇒ String
Returns the block signature.
-
#timestamp ⇒ Time
Returns the timestamp of when the node saw the block.
- #to_s ⇒ String (also: #inspect)
-
#type ⇒ String
Returns the type of the block.
-
#unconfirmed? ⇒ Boolean
(also: #unchecked?)
Returns true if block is unconfirmed.
-
#valid_work?(work) ⇒ Boolean
Returns true if work is valid for the block.
-
#work ⇒ String
Returns the block work.
Constructor Details
#initialize(rpc, block) ⇒ Block
Returns a new instance of Block.
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# File 'lib/nanook/block.rb', line 25 def initialize(rpc, block) @rpc = rpc @block = block.to_s end |
Instance Method Details
#==(other) ⇒ Boolean Also known as: eql?
Returns true if blocks are equal.
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# File 'lib/nanook/block.rb', line 43 def ==(other) other.class == self.class && other.id == id end |
#account ⇒ Nanook::Account
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# File 'lib/nanook/block.rb', line 286 def account memoized_info[:account] end |
#amount(unit: Nanook.default_unit) ⇒ Float
Returns the amount of the block.
Example:
block.amount # => 3.01
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# File 'lib/nanook/block.rb', line 298 def amount(unit: Nanook.default_unit) validate_unit!(unit) amount = memoized_info[:amount] return amount unless unit == :nano raw_to_NANO(amount) end |
#ancestors(limit: 1000, offset: 0) ⇒ Object Also known as: chain
Returns a consecutive list of block hashes in the account chain from (but not including) block back to count
(direction from frontier back to open block, from newer blocks to older). Will list all blocks back to the open block of this chain when count is set to “-1”.
See also #descendants.
Example:
block.ancestors(limit: 2)
Example reponse:
[Nanook::Block, ...]
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# File 'lib/nanook/block.rb', line 85 def ancestors(limit: 1000, offset: 0) # The RPC includes this block in its response, and Nanook will remove it from the results. # Increment the limit by 1 to account for this (a limit of -1 is valid and means no limit). limit += 1 if limit > 0 params = { count: limit, offset: offset, _access: :blocks, _coerce: Array } response = rpc(:chain, :block, params)[1..].to_a response.map { |block| as_block(block) } end |
#balance(unit: Nanook.default_unit) ⇒ Float
Returns the balance of the account at the time the block was created.
Example:
block.balance # => 3.01
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# File 'lib/nanook/block.rb', line 315 def balance(unit: Nanook.default_unit) validate_unit!(unit) balance = memoized_info[:balance] return balance unless unit == :nano raw_to_NANO(balance) end |
#cancel_work ⇒ Boolean
Stop generating work for a block.
Example:
block.cancel_work # => true
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# File 'lib/nanook/block.rb', line 64 def cancel_work rpc(:work_cancel, :hash).empty? end |
#change? ⇒ Boolean
Returns true if block is type “change” (change of representative).
Example:
block.change? # => true
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# File 'lib/nanook/block.rb', line 473 def change? type == 'change' end |
#confirm ⇒ Boolean
Request confirmation for a block from online representative nodes. Will return immediately with a boolean to indicate if the request for confirmation was successful. Note that this boolean does not indicate the confirmation status of the block.
Example:
block.confirm # => true
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# File 'lib/nanook/block.rb', line 110 def confirm rpc(:block_confirm, :hash, _access: :started) == 1 end |
#confirmed? ⇒ Boolean Also known as: checked?
Returns true if block is confirmed.
Example:
block.confirmed # => true
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# File 'lib/nanook/block.rb', line 330 def confirmed? memoized_info[:confirmed] end |
#descendants(limit: 1000, offset: 0) ⇒ Array<Nanook::Block> Also known as: successors
Returns an Array of block hashes in the account chain from (but not including) this block up to count
(direction from open block up to frontier, from older blocks to newer). Will list all blocks up to frontier (latest block) of this chain when count
is set to -1
.
See also #ancestors.
Example:
block.descendants # => [Nanook::Block, .. ]
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# File 'lib/nanook/block.rb', line 253 def descendants(limit: 1000, offset: 0) # The RPC includes this block in its response, and Nanook will remove it from the results. # Increment the limit by 1 to account for this (a limit of -1 is valid and means no limit). limit += 1 if limit > 0 params = { count: limit, offset: offset, _access: :blocks, _coerce: Array } response = rpc(:successors, :block, params)[1..].to_a response.map { |block| as_block(block) } end |
#epoch? ⇒ Boolean
Returns true if block is type “epoch”.
Example:
block.epoch? # => true
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# File 'lib/nanook/block.rb', line 483 def epoch? type == 'epoch' end |
#exists?(allow_unchecked: false) ⇒ Boolean
Returns true if block exists in the node's ledger. This will return false for blocks that exist on the nano ledger but have not yet synchronized to the node.
Example:
block.exists? # => false
block.exists?(allow_unchecked: true) # => true
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# File 'lib/nanook/block.rb', line 357 def exists?(allow_unchecked: false) begin allow_unchecked ? memoized_info : info rescue Nanook::NodeRpcError return false end true end |
#generate_work(use_peers: false) ⇒ String
Generate work for a block.
Example:
block.generate_work # => "2bf29ef00786a6bc"
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# File 'lib/nanook/block.rb', line 123 def generate_work(use_peers: false) rpc(:work_generate, :hash, use_peers: use_peers, _access: :work) end |
#hash ⇒ Integer
The hash value is used along with #eql? by the Hash class to determine if two objects reference the same hash key.
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# File 'lib/nanook/block.rb', line 53 def hash id.hash end |
#height ⇒ Integer
Returns the height of the block.
Example:
block.height # => 5
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# File 'lib/nanook/block.rb', line 383 def height memoized_info[:height] end |
#id ⇒ String
Returns the block hash id.
Example:
block.id #=> "FBF8B0E..."
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# File 'lib/nanook/block.rb', line 37 def id @block end |
#info(allow_unchecked: false, unit: Nanook.default_unit) ⇒ Object
Returns a Hash of information about the block.
Examples:
block.info
block.info(allow_unchecked: true)
Example response:
{
"account": Nanook::Account,
"amount": 34.2,
"balance": 2.3
"height": 58,
"local_timestamp": Time,
"confirmed": true,
"type": "send",
"account": Nanook::Account,
"previous": Nanook::Block,
"representative": Nanook::Account,
"link": Nanook::Block,
"link_as_account": Nanook::Account,
"signature": "82D41BC16F313E4B2243D14DFFA2FB04679C540C2095FEE7EAE0F2F26880AD56DD48D87A7CC5DD760C5B2D76EE2C205506AA557BF00B60D8DEE312EC7343A501",
"work": "8a142e07a10996d5"
}
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# File 'lib/nanook/block.rb', line 157 def info(allow_unchecked: false, unit: Nanook.default_unit) validate_unit!(unit) # Params for both `unchecked_get` and `block_info` calls params = { json_block: true, _coerce: Hash } begin response = rpc(:block_info, :hash, params) response.merge!(confirmed: true) rescue Nanook::NodeRpcError => e raise e unless allow_unchecked response = rpc(:unchecked_get, :hash, params) response.merge!(confirmed: false) end parse_info_response(response, unit) end |
#next ⇒ Nanook::Block
Returns the Nanook::Block of the next (newer) block in the account chain.
Example:
block.next # => Nanook::Block
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# File 'lib/nanook/block.rb', line 373 def next successors(limit: 1).first end |
#open? ⇒ Boolean
Returns true if block is type “open”.
Example:
block.open? # => true
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# File 'lib/nanook/block.rb', line 453 def open? type == 'open' end |
#pending?(allow_unconfirmed: false) ⇒ Boolean
Returns true if block is a pending block.
Example:
block.pending? #=> false
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# File 'lib/nanook/block.rb', line 229 def pending?(allow_unconfirmed: false) params = { include_only_confirmed: !allow_unconfirmed, _access: :exists } rpc(:pending_exists, :hash, params) == 1 end |
#previous ⇒ Nanook::Block
Returns the Nanook::Block of the previous (older) block in the account chain.
Example:
block.previous # => Nanook::Block
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# File 'lib/nanook/block.rb', line 423 def previous memoized_info[:previous] end |
#receive? ⇒ Boolean
Returns true if block is type “receive”.
Example:
block.receive? # => true
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# File 'lib/nanook/block.rb', line 463 def receive? type == 'receive' end |
#representative ⇒ Nanook::Account
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# File 'lib/nanook/block.rb', line 276 def representative memoized_info[:representative] end |
#republish(destinations: nil, sources: nil) ⇒ Array<Nanook::Block>
Republish blocks starting at this block up the account chain back to the nano network.
Example:
block.republish # => [Nanook::Block, ...]
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# File 'lib/nanook/block.rb', line 200 def republish(destinations: nil, sources: nil) if !destinations.nil? && !sources.nil? raise ArgumentError, 'You must provide either destinations or sources but not both' end params = { _access: :blocks, _coerce: Array } params[:destinations] = destinations unless destinations.nil? params[:sources] = sources unless sources.nil? params[:count] = 1 if destinations || sources rpc(:republish, :hash, params).map do |block| as_block(block) end end |
#send? ⇒ Boolean
Returns true if block is type “send”.
Example:
block.send? # => true
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# File 'lib/nanook/block.rb', line 443 def send? type == 'send' end |
#signature ⇒ String
Returns the block signature.
Example:
block.signature # => "82D41BC16F313E4B2243D14DFFA2FB04679C540C2095FEE7EAE0F2F26880AD56DD48D87A7CC5DD760C5B2D76EE2C205506AA557BF00B60D8DEE312EC7343A501"
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# File 'lib/nanook/block.rb', line 403 def signature memoized_info[:signature] end |
#timestamp ⇒ Time
Returns the timestamp of when the node saw the block.
Example:
block. # => 2018-05-30 16:41:48 UTC
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# File 'lib/nanook/block.rb', line 413 def memoized_info[:local_timestamp] end |
#to_s ⇒ String Also known as: inspect
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# File 'lib/nanook/block.rb', line 488 def to_s "#{self.class.name}(id: \"#{short_id}\")" end |
#type ⇒ String
Returns the type of the block. One of “open”, “send”, “receive”, “change”, “epoch”.
Example:
block.type # => "open"
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# File 'lib/nanook/block.rb', line 433 def type memoized_info[:type] end |
#unconfirmed? ⇒ Boolean Also known as: unchecked?
Returns true if block is unconfirmed.
Example:
block.unconfirmed? # => true
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# File 'lib/nanook/block.rb', line 341 def unconfirmed? !confirmed? end |
#valid_work?(work) ⇒ Boolean
Returns true if work is valid for the block.
Example:
block.valid_work?("2bf29ef00786a6bc") # => true
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# File 'lib/nanook/block.rb', line 187 def valid_work?(work) response = rpc(:work_validate, :hash, work: work) response[:valid_all] == 1 || response[:valid_receive] == 1 end |
#work ⇒ String
Returns the block work.
Example:
block.work # => "8a142e07a10996d5"
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# File 'lib/nanook/block.rb', line 393 def work memoized_info[:work] end |