RuntimeVersion
data class RuntimeVersion(val specName: String, val specVersion: Long, val implName: String? = null, val implVersion: Long? = null, val transactionVersion: Long? = null)
The node's reported runtime version, from Substrate's state_getRuntimeVersion.
Substrate's runtime version doesn't carry the midnight-ledger semver directly; the most useful signal for a ledger-coherence check is specName + specVersion (e.g. the runtime bumps specVersion on a ledger-affecting upgrade). The raw values are kept so the host can decide how to map them to a known-compatible set.