Happy Wallet SDK
The Happy Wallet is an embedded wallet that lets user log in with their social accounts (web3 wallets are also supported), enables gas sponsorship (1), and allows apps to make transactions without the user having to confirm them via session keys.
Please see the Getting Started page for a full overview of how to integrate and interact with the wallet.
(1) Each user gets a daily gas budget that streams back over time. On the HappyChain Sepolia testnet, this budget is quite large. Once the user runs out of budget, he must pay for the gas himself, or an app must sponsor (not implemented yet).