x402 meets smart wallets: where does signature compatibility stop?
A shopping agent can find the right product and produce a payment signature. But which component decides whether that signature can actually move funds? For teams combining x402 with smart accounts, that is the interoperability question I want to discuss. This is a discussion prompt, not a test report. We have not completed an EOA/deployed-smart-account/undeployed-smart-account compatibility…
The article examines the compatibility between x402 and smart wallets, specifically focusing on signature validation. It outlines three key boundaries to test separately: merchant-side validation, facilitator verification and settlement, and the token-transfer path. The author emphasizes that each component - from merchant to facilitator to token contract - must be individually assessed for compatibility, not just assumed to be compatible due to the absence of private keys.
The article also stresses the importance of recording verification responses separately from confirmed transfers. It encourages reproducible testing, including the recording of testnet, wallet implementation, facilitator version, token contract, deployment state, and the stage that accepts or rejects the request. The goal is to prevent developers from relying on a particular wallet stack without a clear understanding of its compatibility.
The author, representing WebAZ, invites others to share their testnet examples demonstrating their approach to handling ERC-6492 at the verification-to-settlement boundary.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
