My first Solana program has one job: stand between an older parent and a scammer.

Picture an older mother getting a message from her "son": he lost his phone, he is in trouble, please send money right now. In a normal wallet she taps Send and the money is gone for good. Night Guard Wallet adds a pause first: it reads the message, simulates the transfer, checks who is on the other side, and asks her daughter to approve before anything leaves the vault.

Two days earlier I had never written a line of Solana. By the end of the weekend, a program I wrote was refusing scam payments on its own, seven times in a row, with my demo app deliberately pushing them through.

This is the story of Night Guard Wallet , built for the MLH Solana Hackathon .

TL;DR: Night Guard Wallet is a guard for the people scammers target most: our parents and grandparents (and honestly, the rest of us too).…