Wallet signing is one of the most critical and most broken parts of Web3 user experience. Users are routinely asked to approve opaque transactions they cannot interpret, creating significant security risks.

This session explores how to design backend-driven signing APIs using EIP-712 structured data to produce human-readable, verifiable transaction intents. We will break down how smart contract calls are transformed into typed data, how backend systems construct and validate signing payloads, and how to prevent replay attacks, phishing vectors, and signature misuse.

The talk will focus on production patterns for building secure signing pipelines that bridge low-level blockchain interactions with clear, user-safe experiences.