Swiftpack.co - Package - Ryucoin/neovm-utils


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neovmUtils is a native iOS framework for interacting with the Ontology and NEO blockchains. It includes a compiled version of the neo-utils project by O3 Labs written in Go.

neovmUtils also implements BIP39 mnemonic phrases to generate wallets using an iOS wrapper of the Trezor Crypto library.

It allows users to interact with numerous classes of digital assets on Ontology, such as native ONT/ONG and OEP4/5/8/10 assets.


neovmUtils is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'neovmUtils'

And import it into your project with:

import neovmUtils

Note: neovmUtils requires iOS 12.0 or higher.

An example Podfile would look like this:

platform :ios, '12.0'

target :'My_App' do
  pod 'neovmUtils'


neovmUtils requires:


neovmUtils offers:


The full neo-utils golang SDK is available for use with this pod. Simply import it with import Neoutils.

Documentation for the Go implementation is available here.


The compiled neo-utils sdk is a little complicated to use, so a lot of it has been improved in native Swift.

For example, wallet creation can be done like the following:

import Neoutils (Compiled Swift):

let wif = "<SOME VALID WIF>"
let err = NSErrorPointer(nilLiteral: ())
let account = NeoutilsGenerateFromWIF(wif, err) // account is of type NeoutilsWallet?
if err != nil {
  print("There was an error: \(err!)")

Or it can be done like this:

import neovmUtils (Swift Abstraction):

let wif = "<SOME VALID WIF>"
let account = walletFromWIF(wif: wif) // account is of type Wallet?


We welcome contributors to neovmUtils. Before beginning, please take a look at our contributing guidelines.

It follows the ontio-community sdk specifications doc for its Ontology integration.

The compiled headers created by gomobile should be wrapped in NS_ASSUME_NONNULL macros until this is resolved by gomobile (https://stackoverflow.com/a/36164132/3830876).

Primary Authors

neovmUtils - Wyatt Mufson from Ryu Games and TowerBuilders

neo-utils - Apisit Toompakdee from O3 Labs


neovmUtils is available under the MIT license.


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1.2.0 - Jun 14, 2019

  • Basic support for the NEO blockchain.
  • Can invoke and invoke-read contracts deployed to NEO.
  • Can use asset interfaces (OEP4/5/8/10) regardless of chain.

1.1.0 - Jun 11, 2019

  • Full implementation of enhanced OEP 5
  • NEOVMParser to decode serialized objects from storage
  • DynamicList and PackedList support from https://github.com/TowerBuilders/Ontology-Advanced-Storage-Objects
  • Implementation of CES1
  • Improved tests
  • Reorganized the internal file structure

1.0.0 - May 27, 2019

  • OEP4/5/8 Interfaces
  • OntMonitor support
  • OntologyWallet file class
  • Lock/unlock Wallets and Identities
  • scriptHashToAddress utility function
  • Increased testing
  • Numerous other bug fixes

0.4.3 - May 22, 2019

0.2.3 - Mar 18, 2019