Number of sessions before the end of an era when the election for the next era will
start.
This determines how many sessions before the last session of the era the staking
election process should begin.
The value is bounded between 1 (election starts at the beginning of the last
session) and SessionsPerEra (election starts at the beginning of the first session
of the era).
Example:
If SessionsPerEra = 6 and PlanningEraOffset = 1, the election starts at the
beginning of session 6 - 1 = 5.
If PlanningEraOffset = 6, the election starts at the beginning of session 6 - 6 = 0, meaning it starts at the very beginning of the era.
Number of sessions before the end of an era when the election for the next era will start.
SessionsPerEra(election starts at the beginning of the first session of the era).Example:
SessionsPerEra = 6andPlanningEraOffset = 1, the election starts at the beginning of session6 - 1 = 5.PlanningEraOffset = 6, the election starts at the beginning of session6 - 6 = 0, meaning it starts at the very beginning of the era.