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The Swift SDK supports iOS 15+ and macOS 12+. OMSClient is the entry point for wallet auth, signing, signature verification, ID tokens, transaction helpers, and balance queries.

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Install

Add the package in Xcode with File -> Add Package Dependencies and enter the following git URL. 
https://github.com/0xsequence/swift-sdk.git
For CocoaPods, add the pod to your Podfile. 
pod 'oms-client-swift-sdk', '0.1.0-alpha.1'
Import the SDK in the files that use it. 
import OMS_SDK

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Create The Client

Create one OMSClient when your app starts and keep it alive for the current app session. 
let oms = OMSClient(
    publishableKey: "YOUR_PROJECT_ACCESS_KEY",
    projectId: "YOUR_PROJECT_ID"
)
The client exposes:
PropertyUse
oms.walletAuthentication, session state, wallet selection, signing, signature verification, ID tokens, and transactions.
oms.indexerToken balance reads.
oms.supportedNetworksNetworks supported by this SDK build.

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Authenticate With Email

Email auth is a two-step OTP flow. 
try await oms.wallet.startEmailAuth(email: "user@example.com")

// Show your OTP input, then complete auth with the user-entered code.
let result = try await oms.wallet.completeEmailAuth(code: "123456")

if case let .walletSelected(walletAddress, _, _, _) = result {
    print("Wallet address:", walletAddress)
}
completeEmailAuth verifies the OTP, loads an existing wallet for the user, or creates one when needed. Wallet metadata and session state are persisted in the device keychain.

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Send A Transaction

After authentication, send a native token transaction with oms.wallet.sendTransaction. Values are raw base-unit integer strings. On testnets, fee options are automatically sponsored, so Polygon Amoy is a good first network for testing. 
let tx = try await oms.wallet.sendTransaction(
    network: .polygonAmoy,
    to: "0xRecipient",
    value: "0"
)

print("Transaction:", tx.txnHash ?? tx.txnId)