transaction.expire's answer (packages/wallet-api/README.md): NOT_EXPIRED while the row's lifetime holds, with what wallet-api seen, else the row's status.
transaction.expire
NOT_EXPIRED
seen
The row still holds its pool nonce; nonce.release advances it and hands it back.
nonce.release
Optional
transaction.expire's answer (packages/wallet-api/README.md):NOT_EXPIREDwhile the row's lifetime holds, with what wallet-apiseen, else the row's status.