tephra-core/src/main/java/org/apache/tephra/persist/TransactionEditCodecs.java [162:183]:
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    public void encode(TransactionEdit src, DataOutput out) throws IOException {
      out.writeLong(src.getWritePointer());
      // use ordinal for predictable size, though this does not support evolution
      out.writeInt(src.getState().ordinal());
      out.writeLong(src.getExpiration());
      out.writeLong(src.getCommitPointer());
      out.writeBoolean(src.getCanCommit());
      Set<ChangeId> changes = src.getChanges();
      if (changes == null) {
        out.writeInt(0);
      } else {
        out.writeInt(changes.size());
        for (ChangeId c : changes) {
          byte[] cKey = c.getKey();
          out.writeInt(cKey.length);
          out.write(cKey);
        }
      }
      // NOTE: we didn't have visibilityUpperBound in V1, it was added in V2
      // we didn't have transaction type, truncateInvalidTx and truncateInvalidTxTime in V1 and V2,
      // it was added in V3
    }
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tephra-core/src/main/java/co/cask/tephra/persist/TransactionEditCodecs.java [164:185]:
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    public void encode(TransactionEdit src, DataOutput out) throws IOException {
      out.writeLong(src.getWritePointer());
      // use ordinal for predictable size, though this does not support evolution
      out.writeInt(src.getState().ordinal());
      out.writeLong(src.getExpiration());
      out.writeLong(src.getCommitPointer());
      out.writeBoolean(src.getCanCommit());
      Set<ChangeId> changes = src.getChanges();
      if (changes == null) {
        out.writeInt(0);
      } else {
        out.writeInt(changes.size());
        for (ChangeId c : changes) {
          byte[] cKey = c.getKey();
          out.writeInt(cKey.length);
          out.write(cKey);
        }
      }
      // NOTE: we didn't have visibilityUpperBound in V1, it was added in V2
      // we didn't have transaction type, truncateInvalidTx and truncateInvalidTxTime in V1 and V2,
      // it was added in V3
    }
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