message: fix: queryRootHash return type changed to buffer
diff: @@ -50,7 +50,7 @@ export default class ProofsUtil {
  static async queryRootHash(web3: any, startBlock: number, endBlock: number) {
  try {
  - return `0x${await web3.bor.getRootHash(startBlock, endBlock)}`
  + return ethUtils.toBuffer(`0x${await web3.bor.getRootHash(startBlock, endBlock)}`)
  } catch (err) {
  return null
  }
  