Celo iOS SDK (alpha v1.0.1)

iOS SDK for the Celo blockchain

• Learn more about Celo
• 

Requirements

• XCode 13.1+ with IOS compiler supporting v14 or v15.
• Apple developer account
  • Register your developer account with Apple and associate with the project build settings for a digital signature to compile.
    • Download developer management app from AppStore
    • Another option is to utilize the web portal
      • https://developer.apple.com/enroll/app
    • If issues prevent registration or activation of your developer account, contact Apple developer program 1-800-692-7753 for manual review
    • Once approved, associate project build settings with your developer account.

Installation

• Fork/Clone Github repository
• Adjust build settings to include your developer account
• Known issues with M1 mac (Arm64)
  • To increase compatibility, run Xcode with Rosetta enabled.
    • Right click on the Xcode icon, in popup window make sure that Open using Rosetta is checked.
  • Known project dependencies that needed to be refreshed to work on M1 chipset
    • https://github.com/skywinder/web3swift
    • https://github.com/jrendel/SwiftKeychainWrapper
• Build & Test!
• You may run on device as well.Please unzip the frameworks for arm64 and replace in Framework folder in SDK and Sample app

Structure

The SDK connects to alfajores network by default. This can be changed in SDK like this

Configuration.changeEnvironment(isProduction: false) -- Alfajores
Configuration.changeEnvironment(isProduction: true) -- Mainnet

Learn more about Celo's networks

Workspace

The project is supplied as a workspace with both the SDK and Sample reference app. Utilize the CeloIOSWorkspace.xcworkspace

Select the celo-refernce-app and run the application

(Not a needed Step) But in case of any changes performed in framework ,please select the celo-sdk-ios and build the application

Post that replace the new framework in Sample app in Framework,Libraries and Embedded Content

SDK Usage

Import the SDK

 import celo_sdk_ios

Import PromiseKit.Promises simplify asynchronous programming.

 import PromiseKit

Initialize and generate current Account without any password

CeloSDK.shared.initializeWalletConnect {
            print("address\(CeloSDK.currentAccount?.address)")
}

Get current account wallet address

CeloSDK.currentAccount?.address

Initialize contract kit instance

let contractkit = CeloSDK.shared.contractKit

(Important step to be done after generating wallet)
```swift
First fetch the Stable Token Address ,this will internally set it as the FeeCurrency in the ContractKit 
```swift
 firstly {
   StableTokenWrapper().getStableTokenAddress()
        }.then { address in
  print(address)
            
        }

Set the feeCurrency by passing the Celo FeeCurrency for specific Stable Token

contractkit.setFeeCurrency(feeCurrency: mFeeCurrency)
 mFeeCurrency - CUSD Fee Currency

Get the feeCurrency for specific Stable Token

contractkit.getFeeCurrency()

Get CUSD Balance for an address

 firstly {
  contractkit.getStableTokenBalanceOf(currentAddress:mAddress)
    }.done { balance in
  print(balance)
    }
 mAddress - User's wallet Address

Get Native Celo Balance

 contractkit.calculateCELO()

Get GasPriceMinimum for a Token

 firstly {
     CeloSDK.shared.contractKit.getGaspriceMinimum(tokenType:CeloContractClass.StableToken)
        }.done {gasPrice in
        print(gasPrice)
       }

Token transfer/Transaction

firstly {
       CeloSDK.shared.contractKit.transfer(amount: self.fromAddressField.text!, toAddress: self.toAddressField.text!)
        }.done { txRecieptHash in
            print(txRecieptHash)
        }

Initialize contract kit instance for a specific web3 instance and abi hosted in your network

let contract = CeloSDK.shared.contractKit.getContractKit(web3Instance: CeloSDK.web3Net, abi, at: EthereumAddress(contractAddress)!)

To set web3 url instance

let web3net = try CeloSDK.customNet(url: "")
This can be accessed from SDK via CeloSDK.web3Net

Returns an array of attestations that can be completed, along with the issuers' attestation service urls

• @param identifier Attestation identifier (e.g. phone hash)
• @param account Address of the account

contractKit.contracts.getAttestations().getCompletableAttestations(identifier: identifier, account: CeloSDK.currentAccount!.address)

Returns the attestation stats of a identifer/account pair

• @param identifier Attestation identifier (e.g. phone hash)
• @param account Address of the account

contractKit.contracts.getAttestations().getAttestationStats(identifier: identifier, account: CeloSDK.currentAccount!.address)

Returns the list of accounts associated with an identifier

• @param identifier Attestation identifier (e.g. phone hash)

contractKit.contracts.getAttestations().lookupAccountsForIdentifier(identifier: identifier)

Returns the unselected attestation request for an identifier/account pair, if any.

• @param identifier Attestation identifier (e.g. phone hash)
• @param account Address of the account

contractKit.contracts.getAttestations().getUnselectedRequest(identifier: identifier,account: CeloSDK.currentAccount!.address)

Returns the time an attestation can be completable before it is considered expired.

contractKit.contracts.getAttestations().getAttestationExpiryBlocks()

Requests a new attestation.

• @param identifier Attestation identifier (e.g. phone hash)
• @param attestationsRequested The number of attestations to request
• @param attestationRequestFeeToken Attestattion fee

contractKit.contracts.getAttestations().request(identifier:Data,attestationsRequested:BigUInt,attestationRequestFeeToken:String)

Requests a new attestation.

• @param token Stable Token address

contractKit.contracts.getAttestations().getAttestationFeeRequired(token:String)

Selects the issuers for previously requested attestations for a phone number

• @param identifier Attestation identifier (e.g. phone hash)

contractKit.contracts.getAttestations().selectIssuers(identifier:Data)

Returns the time an Issuer can be assigned for a given attestation

contractKit.contracts.getAttestations().selectIssuersWaitBlocks(identifier:Data)

Completes an attestation with the corresponding code

• @param identifier Attestation identifier (e.g. phone hash)
• Signatures v,r,s to be calculated from account,issuer and code

contractKit.contracts.getAttestations().complete(identifier:Data,v:BigUInt,r:Data,s:Data)

Validates a given code by the issuer on-chain

• @param identifier Attestation identifier (e.g. phone hash)
• Signatures v,r,s to be calculated from account,issuer and code

contractKit.contracts.getAttestations().validateAttestationCode(identifier:Data,v:BigUInt,r:Data,s:Data)

Generating a new account with password

CeloSDK.account.generateAccount(password)

Import account with password and mnemonic

CeloSDK.account.importAccount(mnemonics, password)
CeloSDK.account.importAccount(privateKey, password)

Get mnemonics

CeloSDK.shared.mnemonics

Get private key with Password

CeloSDK.shared.privateKey(password: mPassWord)

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.