What signing for a ledger account's own wallet needs; never on the public LedgerAccount.
LedgerAccount
The primary secret's SOLANA account-0 address.
False for a LEGACY_MINTFX primary: a PDA no key signs for.
LEGACY_MINTFX
The wallet wallet-api signs as (wal_…).
wal_…
What signing for a ledger account's own wallet needs; never on the public
LedgerAccount.