Pacto is a non-custodial, decentralized peer-to-peer exchange for Stellar-based stablecoins, built in 48 hours at the Casa Builder Hackathon using Trustless Work. It enables merchants and users to trade stablecoins for local fiat via on-chain smart escrow contracts without intermediaries. The open-source project supports community ramps, merchant off-ramps, and DAO payouts.