Function resolve_epoch_no 

pub fn resolve_epoch_no(
    network: &Network,
    milliseconds: Option<u64>,
) -> Option<u64>

Resolve the epoch number for a network at a given time.

Arguments

• network - The Cardano network
• milliseconds - Optional POSIX time in milliseconds (defaults to current time)

Returns

The epoch number, or None if the network is Custom