Devnet lifecycle

Read — the mint is read from devnet this visit: decimals, authorities, every extension, and nothing assumed from a previous read. Preview — the exact transfer is computed from that read, including the cluster’s own simulation of the built bytes. Judge — thirteen rules run against a declared policy before a signature exists, so a refusal costs nothing.

Sign — your wallet, your key. Ryntra holds none, and asks for a signature rather than a send, so there is a moment afterwards in which the returned bytes are compared to the ones that were built. Submit — only cleared bytes go out. Observe — the chain is read back independently and compared to what was expected; a deviation is recorded as a deviation, because an outcome that mostly matched is not a match. Receipt — an Ed25519-signed record anyone can verify without trusting this site.

No key, seed phrase or secret passes through Ryntra at any point. Set the wallet to devnet before connecting — Phantom labels every non-mainnet cluster “Testnet”.