The Binance-founded blockchain has introduced a new layer-2 chain opBNB, though some suggest there are other ways to scale the network. Binance-founded layer-1 blockchain BNB Chain has introduced a new layer-2 chain that it hopes will address its “scalability challenge.” On June 19, BNB Chain unveiled opBNB, which has launched as a testnet. The new layer-2 scaling solution is based on the Optimism OP Stack, which it says will add additional security and scalability to the Binance blockchain network.