prepareChainConfig.ts

import { ChainConfig, ChainConfigArbitrumParams } from './types/ChainConfig';

export const defaults = {
  homesteadBlock: 0,
  daoForkBlock: null,
  daoForkSupport: true,
  eip150Block: 0,
  eip150Hash: '0x0000000000000000000000000000000000000000000000000000000000000000',
  eip155Block: 0,
  eip158Block: 0,
  byzantiumBlock: 0,
  constantinopleBlock: 0,
  petersburgBlock: 0,
  istanbulBlock: 0,
  muirGlacierBlock: 0,
  berlinBlock: 0,
  londonBlock: 0,
  clique: {
    period: 0,
    epoch: 0,
  },
  arbitrum: {
    EnableArbOS: true,
    AllowDebugPrecompiles: false,
    DataAvailabilityCommittee: false,
    InitialArbOSVersion: 20,
    GenesisBlockNum: 0,
    MaxCodeSize: 24_576,
    MaxInitCodeSize: 49_152,
  },
};

export type PrepareChainConfigParams = Pick<ChainConfig, 'chainId'> &
  Partial<Omit<ChainConfig, 'chainId' | 'arbitrum'>> & {
    arbitrum: Pick<ChainConfigArbitrumParams, 'InitialChainOwner'> &
      Partial<Omit<ChainConfigArbitrumParams, 'InitialChainOwner'>>;
  };

export function prepareChainConfig(params: PrepareChainConfigParams): ChainConfig {
  return {
    ...defaults,
    ...params,
    clique: { ...defaults.clique, ...params.clique },
    arbitrum: { ...defaults.arbitrum, ...params.arbitrum },
  };
}