The AI Understood My Payment Request. My Rust Code Refused It.
An AI that can read "send 0.05 SOL to Ada for lunch" is useful. An AI that can decide to send money is a liability. For the MLH Solana Hackathon, I built SpendGuard , a payment agent for Solana Devnet. You talk to it in plain English. An LLM turns your words into a payment proposal. Deterministic Rust code then decides whether that payment is allowed. You approve the exact transaction, and only…
In the MLH Solana Hackathon, the author developed a payment agent named SpendGuard for the Solana Devnet. SpendGuard allows users to communicate with it in plain English, and an LLM converts those words into a payment proposal. The decision on whether the payment is allowed is made through deterministic Rust code. The user then approves the exact transaction before it is signed and submitted to the Solana Devnet.