OKX's comes as other major cryptocurrency exchanges, like Coinbase and Kraken, have also pursued their own layer 2 networks over the last year. OKX, the fourth-largest crypto exchange, said its new layer-2 blockchain, called X Layer, has gone live on its public mainnet, a continuation in the era of major crypto companies starting their own distributed networks. X Layer, previously known as X1, makes use of Polygon's Chain Development Kit (CDK), a customizable toolkit that lets developers build their own chains by making use of zero-knowledge technology. The news comes as other major cryptocurrency exchanges have pursued their own layer-2 networks over the past year. In August, Coinbase launched its “Base” blockchain, which is built with Optimism’s OP Stack. Kraken is reportedly also interested in creating its own layer-2 blockchain.