Digital assets and currencies
Understand assets, networks and trading mechanics with sources you can check.
Opal is a contactless smartcard fare collection system for public transport services in New South Wales, Australia. Operation of the Opal system is managed by Transport for NSW. First launched in late 2012, Opal is valid on Transport for NSW's metro, train, bus, ferry and light rail services that operate in Sydney, Central Coast, Hunter Region, Blue Mountains, Illawarra and Southern High