Gem Version Inline docs


Crea-ruby the Ruby API for Crea blockchain.

Full documentation:

Note: This library depends on AppBase methods that are a work in progress.

Getting Started

The crea-ruby gem is compatible with Ruby 2.2.5 or later.

Install the gem for your project

(Assuming that Ruby is installed on your computer, as well as RubyGems)

To install the gem on your computer, run in shell:

bash gem install crea-ruby

… then add in your code:

ruby require 'crea'

To add the gem as a dependency to your project with Bundler, you can add this line in your Gemfile:

ruby gem 'crea-ruby', require: 'crea'


Broadcast Vote

```ruby params = { voter: voter, author: author, permlink: permlink, weight: weight } wif, params: params) do |result| puts result end ```

See: Broadcast


The value passed to the block is an object, with the keys: :type and :value.

```ruby stream =

stream.operations do |op| puts “#opop.type: #opop.value” end ```

To start a stream from a specific block number, pass it as an argument:

```ruby stream =

stream.operations(at_block_num: 9001) do |op| puts “#opop.type: #opop.value” end ```

You can also grab the related transaction id and block number for each operation:

```ruby stream =

stream.operations do |op, trx_id, block_num| puts “#block_num :: #trx_id” puts “#opop.type: #opop.value” end ```

To stream only certain operations:

```ruby stream =

stream.operations(types: :vote_operation) do |op| puts “#opop.type: #opop.value” end ```

Or pass an array of certain operations:

```ruby stream =

stream.operations(types: [:comment_operation, :vote_operation]) do |op| puts “#opop.type: #opop.value” end ```

Or (optionally) just pass the operation(s) you want as the only arguments. This is semantic sugar for when you want specific types and take all of the defaults.

```ruby stream =

stream.operations(:vote_operation) do |op| puts “#opop.type: #opop.value” end ```

To also include virtual operations:

```ruby stream =

stream.operations(include_virtual: true) do |op| puts “#opop.type: #opop.value” end ```


You can use multisignature to broadcast an operation.

```ruby params = { voter: voter, author: author, permlink: permlink, weight: weight } [wif1, wif2], params: params) do |result| puts result end ```

In addition to signing with multiple wif private keys, it is possible to also export a partially signed transaction to have signing completed by someone else.

```ruby builder = wif1)

builder.put(vote: { voter: voter, author: author, permlink: permlink, weight: weight })

trx = builder.sign.to_json‘trx.json’, ‘w’) do |f| f.write(trx) end ```

Then send the contents of trx.json to the other signing party so they can privately sign and broadcast the transaction.

ruby trx = open('trx.json').read builder = wif2, trx: trx) api = trx = builder.transaction api.broadcast_transaction_synchronous(trx)

Get Accounts

```ruby api =

api.find_accounts(accounts: [‘creary’, ‘alice’]) do |result| puts result.accounts end ```

See: Api

Reputation Formatter

ruby rep = Crea::Formatter.reputation(account.reputation) puts rep


  • Clone the client repository into a directory of your choice:
    • git clone
  • Navigate into the new folder
    • cd crea-ruby
  • All tests can be invoked as follows:
    • bundle exec rake test
  • To run static tests:
    • bundle exec rake test:static
  • To run broadcast tests (broadcast is simulated, only verify is actually used):
    • bundle exec rake test:broadcast
  • To run threads tests (which quickly verifies thread safety):
    • bundle exec rake test:threads
  • To run testnet tests (which does actual broadcasts)
    • TEST_NODE= bundle exec rake test:testnet

You can also run other tests that are not part of the above test execution:

  • To run block_range, which streams blocks (using json-rpc-batch)
    • bundle exec rake stream:block_range

If you want to point to any node for tests, instead of letting the test suite pick the default, set the environment variable to TEST_NODE, e.g.:

bash $ TEST_NODE= bundle exec rake test


Patches are welcome! Contributors are listed in the crea-ruby.gemspec file. Please run the tests (rake test) before opening a pull request and make sure that you are passing all of them. If you would like to contribute, but don’t know what to work on, check the issues list.


When you find issues, please report them!