Hardfork

Hardfork: "chainstart" | "homestead" | "dao" | "tangerineWhistle" | "spuriousDragon" | "byzantium" | "constantinople" | "petersburg" | "istanbul" | "muirGlacier" | "berlin" | "london" | "arrowGlacier" | "grayGlacier" | "mergeForkIdTransition" | "paris" | "shanghai" | "cancun"

Ethereum hardfork option

Source

packages/base-client/src/Hardfork.ts:4