How We Use Ed25519 Signatures to Give Users Cryptographic Proof Before They Send Crypto

Most instant crypto swap services work on pure trust. You visit the site, get a deposit address, send funds, and hope the service sends back what it quoted. There's no cryptographic commitment before you transact. If something goes wrong — wrong rate applied, address substituted, service disputes the terms — you have nothing verifiable to stand on. We wanted to fix that. Here's how we built a pre-payment signature system for 0trace using Ed25519, and why it matters for users doing private crypto