Polygon CDK Polygon Chain Development Kit (CDK) is a modular, open source software toolkit allowing blockchain developers to launch new zero-knowledge proof (zkEVM plus optional validium) L2 chains on Ethereum. Deploy the stack Get started on deploying a CDK stack. Bridge a token Find out how to use and bridge a token on CDK. Rollup versus validium Discover the key differences between the rollup and validium infrastructure options. Glossary Learn about commonly used terminology and concepts relevant to the CDK tech stack. Polygon type 1 prover Find out about the Polygon type 1 prover component.