message: add comment for process of proof creation
diff: @@ -90,6 +90,17 @@ export class ExitUtil {
  });
  }
  + /**
  + * returns info about block number existance on parent chain
  + * 1. root block number,
  + * 2. start block number,
  + * 3. end block number
  + *
  + * @private
  + * @param {number} txBlockNumber - transaction block number on child chain
  + * @return {*}
  + * @memberof ExitUtil
  + */
  private getRootBlockInfo(txBlockNumber: number) {
  // find in which block child was included in parent
  let rootBlockNumber: BaseBigNumber;
  @@ -105,8 +116,12 @@ export class ExitUtil {
  return method.read<IRootBlockInfo>();
  }).then(rootBlockInfo => {
  return {
  + // header block number - root block number in which child block exist
  headerBlockNumber: rootBlockNumber,
  + // range of block
  + // end - block end number
  end: rootBlockInfo.end.toString(),
  + // start - block start number
  start: rootBlockInfo.start.toString(),
  } as IRootBlockInfo;
  });
  @@ -178,26 +193,31 @@ export class ExitUtil {
  );
  }
  + // step 1 - Get Block number from transaction hash
  txBlockNumber = blockInfo.txBlockNumber;
  + // step 2- get transaction receipt from txhash and
  + // block information from block number
  return Promise.all([
  this.maticClient_.getTransactionReceipt(burnTxHash),
  this.maticClient_.getBlockWithTransaction(txBlockNumber)
  ]);
  }).then(result => {
  [receipt, block] = result;
  + // step 3 - get information about block saved in parent chain
  return (
  isFast ? this.getRootBlockInfoFromAPI(txBlockNumber) :
  this.getRootBlockInfo(txBlockNumber)
  );
  }).then(rootBlockInfoResult => {
  rootBlockInfo = rootBlockInfoResult;
  - // build block proof
  + // step 4 - build block proof
  return (
  isFast ? this.getBlockProofFromAPI(txBlockNumber, rootBlockInfo) :
  this.getBlockProof(txBlockNumber, rootBlockInfo)
  );
  }).then(blockProofResult => {
  blockProof = blockProofResult;
  + // step 5- create receipt proof
  return ProofUtil.getReceiptProof(
  receipt,
  block,
  @@ -208,7 +228,7 @@ export class ExitUtil {
  const logIndex = this.getLogIndex_(
  logEventSig, receipt
  );
  -
  + // step 6 - encode payload, convert into hex
  return this.encodePayload_(
  rootBlockInfo.headerBlockNumber.toNumber(),
  blockProof,
  