SDK features and support

Compare available SDK features across iOS and Android, supported wallet providers, and blockchain capabilities.

Use the following tables to identify supported functionality and platform differences when planning your integration.

Rain wallet features

The Rain embedded wallet SDK offers the following capabilities on iOS and Android.

Feature	iOS	Android
Email and SMS authentication	✅	✅
Passkey authentication and enrollment	✅	✅
Session management	✅	✅
EVM and Solana accounts	✅	✅
Wallet balances across assets and chains	✅	✅
Transaction history and pagination	✅	✅
Native asset and token transfers	✅	✅
Gas sponsorship	✅	✅
Transaction fee estimates	✅	✅
Collateral withdrawals	✅	✅
Recovery phrase and private key export	✅	✅
Address QR code generation	✅	✅
Token metadata lookup and registration	✅	✅

Platform differences

Although both SDKs support the same core functionality, certain implementation details differ.

Feature	iOS	Android
QR code generation	PNG data	Bitmap

Platform consistency

Rain wallet accounts work across iOS and Android. Users can authenticate on either platform using an existing login method and access the same wallet.

Both SDKs use consistent error codes, fee estimates, and export formats for recovery phrases and private keys. Platform differences are outlined above.

Third party wallet providers

Rain supports integrations with existing wallet providers through adapters that expose a consistent RainClient interface.

Authentication, wallet creation, and key management remain with the third party provider. Rain’s wallet specific authentication and key management features do not apply to these integrations.

Capability	Rain wallet	Turnkey	Portal	Privy
Authentication through Rain SDK	✅	Vendor SDK	Vendor SDK	Vendor SDK
EVM accounts	✅	✅	✅	✅
Solana accounts	✅	✅	❌	✅
Balances and transaction history	✅	✅	✅	✅
Transfers and collateral withdrawals	✅	✅	✅	✅
Gas sponsorship	✅	✅	❌	❌
Key export through Rain SDK	✅	Android only	Vendor SDK	Vendor SDK
Provider id	.rain / RAIN	.turnkey / TURNKEY	.portal / PORTAL	.privy / PRIVY

Provider IDs

Use the corresponding provider ID when initializing the Rain SDK.

Wallet provider	iOS	Android
Rain wallet	.rain	RAIN
Turnkey	.turnkey	TURNKEY
Portal	.portal	PORTAL
Privy	.privy	PRIVY

The Rain wallet and your own Turnkey integration share the same wallet backend. Register only one of these providers in your application, not both. See Third-party wallet providers.

Blockchain support

Rain embedded wallets support balance retrieval and transaction history across configured blockchains. Outbound transactions and gas sponsorship are available on a defined set of networks.

Blockchain	Balances and history	Sending	Gas sponsorship
Base (Mainnet, Sepolia)	✅	✅	✅
Arbitrum (One, Sepolia)	✅	✅	✅
Optimism (Mainnet, Sepolia)	✅	✅	✅
Polygon (Mainnet, Amoy)	✅	✅	✅
BNB Smart Chain (Mainnet, Testnet)	✅	✅	✅
Monad (Mainnet, Testnet)	✅	✅	✅
Ethereum (Mainnet, Sepolia)	✅	✅	✅
Solana (Mainnet, Devnet)	✅	✅	✅
Solana Testnet	✅	❌	❌
Avalanche (C Chain, Fuji)	✅	❌	❌
Celo	✅	❌	❌
ZKsync	✅	❌	❌
Plasma	✅	❌	❌
Stellar	❌	❌	❌

Chain	Read balances and history	Send from the Rain wallet	Gas sponsored
Base (mainnet, Sepolia)	✅	✅	✅
Arbitrum (One, Sepolia)	✅	✅	✅
Optimism (mainnet, Sepolia)	✅	✅	✅
Polygon (mainnet, Amoy)	✅	✅	✅
BNB Smart Chain (mainnet, testnet)	✅	✅	✅
Monad (mainnet, testnet)	✅	✅	✅
Ethereum (mainnet, Sepolia)	✅	✅	✅
Solana (mainnet, devnet)	✅	✅	✅
Solana testnet	✅	❌	❌
Avalanche (C-Chain, Fuji)	✅	❌	❌
Celo	✅	❌	❌
ZKsync	✅	❌	❌
Plasma	✅	❌	❌
Stellar	❌	❌	❌

Important: Avalanche, Celo, ZKsync, Plasma, and Solana Testnet support balance retrieval and history but not outbound transactions through Rain embedded wallets. Stellar is not currently supported.

Read and send capabilities

Balance retrieval and history: Available on supported chains with a configured RPC endpoint.

Sending: Available only on networks marked as supported above. Attempting to send on an unsupported chain returns RAIN_104 (chainNotSupported).

Gas sponsorship: Enabled by default for outbound transactions on supported networks. On Solana, sponsorship covers transaction fees but not the rent required to create a recipient’s token account. See Gas sponsorship.

Network configuration

Configure an RPC endpoint for each network your application uses. A supported network must also have a configured RPC endpoint before the SDK can send transactions.

Third party wallet providers have their own blockchain capabilities, which may differ from Rain’s native wallet support.

Token support

the SDK retrieves token metadata, including decimals, symbols, and names, from its built in registry of tokens Rain accepts as collateral on each chain (USDC, USDT, DAI, rUSD, and others), tokens you register using registerTokens, or available blockchain data.

For outbound transfers, the SDK must determine a token’s decimals. If it cannot, the request returns RAIN_102 (tokenNotFound).

On Solana, tokens may not expose a symbol directly. Use registerTokens to provide metadata for tokens not included in Rain’s registry.

What’s next

Restrictions

Limits, eligibility, and what’s out of scope for the beta.

Gas sponsorship

What’s sponsored, where, and how to turn it off.

Supported chains and tokens

Chain ids and token contract addresses across Rain.