⚠️ This Repository Has Been Migrated

This project is no longer maintained in this repository.

✅ It has been migrated to a new repository maintained by the gasfree.io developer community:
👉 https://github.com/gasfreeio/gasfree-sdk-swift

All future updates, issues, and contributions should be directed to the new repository.

---

tronlink-gasfree-sdk-swift

tronlink-gasfree-sdk-swift is a toolkit developed by TronLink based on the GasFree API specification. It facilitates the integration of the non-gas TRC20 token transfer service for the iOS platform.

This SDK is provided by TronLink, while the definition & maintenance of the APIs are managed by the official GasFree project. For more information, visit gasfree.io.

Key Features:

• Generate GasFree Addresses from User Addresses
• Generate GasFree Transfer Message Hash

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

• iOS 10.0+
• Swift 4.2

Demo

• testGasFreeMessageParam
• testGasFree712StructHash
• testGenerateGasFreeAddress

Function

import gasfree sdk

    import gasfree_sdk_swift

generateGasFreeAddress

use generateGasFreeAddress with userAddress and general chainId (et. TronLinkGasfreeConfig.nile_chainId 0xcd8690dc)

    let gasfreeAddress = GasFreeGenerator.shareManager.generateGasFreeAddress(chainId: TronLinkGasfreeConfig.nile_chainId, userAddress: userAddress)

gasFreeAddress is your gasFree Address

or more param use userAddress, gasFreeFactoryAddress,beaconAddress and creationCodeStr

    let gasfreeAddress = GasFreeGenerator.shareManager.generateGasFreeAddress(userAddress: userAddress, gasFreeFactoryAddress: gasFreeFactoryAddress, beaconAddress: beaconAddress, creationCodeStr: creationCodeStr)

permitTransferMessageHash

with those params:

    let chainId: String 
    let verifyingContract: String 
    let token: String 
    let serviceProvider: String 
    let user: String 
    let receiver: String  
    let value: String  
    let maxFee: String  
    let deadline: Int64 
    let version: Int64 
    let nonce: Int64 

used permitTransferMessageHash function

    let signHash = try GasFreeGenerator.shareManager.permitTransferMessageHash(chainId: chainId, verifyingContract: verifyingContract, token: token, serviceProvider: serviceProvider, user: user, receiver: receiver, value: value, maxFee: maxFee, deadline: deadline, version: version, nonce: nonce)

You will get the GasFree Transfer Message Hash. or you just use the permitTransferMessageHash(eipJson) function.

and more, you should sign the hash for real transaction.

Integrity Check

The package files will be signed using a GPG key pair, and the correctness of the signature will be verified using the following public key:

  pub: 7B910EA80207596075E6D7BA5D34F7A6550473BA
  uid: build_tronlink <build@tronlink.org>

License

This project is licensed under the Apache License Version 2.0 - see the LICENSE file for details