CROSSx Unity SDK

C# SDK for OAuth authentication, wallet signing/sending, and EVM RPC access in Unity games.

What you can do

• Authenticate users with OAuth (Google / Apple) via platform-native browser
• Restore/refresh session state (InitializeAsync, EnsureLoggedInAsync)
• Create wallet, get addresses
• Sign message / typed data / transaction via SDK confirmation UI
• Send transaction and wait for receipt
• Use RPC helpers (WalletRpcAsync, GetBalanceAsync, GetNonceAsync)

Quick start path

1. Getting Started Install SDK, configure deep link scheme, create CROSSxSDK.
2. Authentication Implement OAuth sign-in, callback handling, and session lifecycle.
3. Wallet Integrate sign/send and receipt polling flows.
4. WebGL Platform-specific notes for WebGL builds.
5. API Reference Check full signatures and object details.

Minimum integration example

var config = new SDKConfig
{
    ProjectId = "YOUR_PROJECT_ID",
    OAuthServerUrl = "https://dev-cross-wallet-oauth.crosstoken.io",
    AuthApiUrl = "https://dev-cross-auth.crosstoken.io",
    EmbeddedWalletGatewayUrl = "https://dev-embedded-wallet-gateway.crosstoken.io/api/v1"
};

var sdk = CROSSxSDKFactory.Create(config);
await sdk.InitializeAsync();

Platform support

Notes

• Chain routing is explicit for wallet/RPC flows (chainId required where applicable, use eip155:<number> such as eip155:612044).
• WalletRpcAsync is call/read oriented (for example eth_call), not transaction sign/send.
• The SDK uses UI Toolkit for confirmation modals (sign, wallet found, PIN input).