Method assertChainId

packages/node/src/indexer/api.service.ts:402–413

(
    network: { chainId: string },
    connection: ApiPromiseConnection,
  )

  // Polkadot uses genesis hash instead of chainId
  protected assertChainId(
    network: { chainId: string },
    connection: ApiPromiseConnection,
  ): void {
    if (network.chainId !== connection.networkMeta.genesisHash) {
      throw new MetadataMismatchError(
        'ChainId',
        network.chainId,
        connection.networkMeta.genesisHash,
      );
    }
  }
}