null while no manager is configured, which is read-only and not an error.
evm:<chainId> or solana.
null when Solana has no outbox account: unknown, not a limit of zero.
EVM only: Solana has no pauser, the owner pauses.
EVM's NTT_MANAGER_VERSION; null on Solana, which is not read yet.
The reviewed peers setPeer may set: the only ones offered.
Why setPeer cannot write this pin; null when it can.
Why the read failed, with no endpoint in it; null unless READ_FAILED.
Whether CFX has a signing path to this manager at all.
READ_FAILED is this manager alone: live is null and readError says why.
One NTT manager on this stage, read live on every call.