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Improved WalletConnect Support and EIP-1193 Fallback

Weekly insights to help you learn, build, and scale onchain.

Onchain Growth Insights by Formo

September 4, 2026

gm, builders! Here’s your roundup of this week’s insights.

Highlights

  • Improved WalletConnect Support

  • EIP-1193 Fallback for Wagmi Mode

  • Reading List


Improved WalletConnect Support

The Web SDK (1.38.2) can now track wallets your app constructs in code, not just the ones a browser injects from EIP-1193.

Wallet discovery covers wallets that announce themselves and wallets that sit at window.ethereum , which is every injected browser wallet and nothing else. A provider your app builds in code, such as WalletConnect, announces nothing.

Hand the provider over with registerProvider and it takes the same path a discovered wallet does: connect and disconnect lifecycle events, and signature and transaction autocapture.

      
        formo.registerProvider(provider);
                                  
      
    

Using Wagmi mode ? This is automatically handled for you and you don’t need to make any changes.

See the WalletConnect integration guide to get started.

View changelog


EIP-1193 Fallback for Wagmi Mode

Wagmi mode captures signature and transaction events from Wagmi hooks. However, if your app also sends imperatively through viem, with sendTransaction , .signMessage , or .writeContract , those calls create no Wagmi mutation and were never captured.

Opt in with eip1193Fallback and the SDK instruments the active connector’s provider with the same request wrapper the EIP-1193 mode uses:

      
        wagmi: ‍​{ ‍​eip1193Fallback: ‍​true ‍​}
                                  
      
    

Upgrade to the latest SDK to get started.


Reading List

  • The Anatomy of a Stablecoin Card Swipe by Rain . Link

  • Social Trading and The Garden of Eden by Ryan Watkins . Link

  • Fixed-Rate Lending: Market Structure and Protocol Design by Castle Labs . Link

  • In Argentina, buying crypto means buying dollars by a16zcrypto . Link

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