Function getHeaderByHeight

packages/node/src/utils/substrate.ts:324–346

(
  api: ApiPromise,
  height: number,
)

}

export async function getHeaderByHeight(
  api: ApiPromise,
  height: number,
): Promise<SubstrateHeader> {
  const blockHash = await api.rpc.chain.getBlockHash(height).catch((e) => {
    logger.error(`failed to fetch BlockHash ${height}`);
    throw ApiPromiseConnection.handleError(e);
  });

  const header = await api.rpc.chain.getHeader(blockHash).catch((e) => {
    logger.error(
      `failed to fetch Block Header hash="${blockHash}" height="${height}"`,
    );
    throw ApiPromiseConnection.handleError(e);
  });
  // validate block is valid
  if (header.hash.toHex() !== blockHash.toHex()) {
    throw new Error(
      `fetched block header hash ${header.hash.toHex()} is not match with blockHash ${blockHash.toHex()} at block ${height}. This is likely a problem with the rpc provider.`,
    );
  }
  return header;
}

export async function fetchBlocksArray(
  api: ApiPromise,