message: core_write: Rename calculate_fee to have_undo for clarity
diff: @@ -180,7 +180,7 @@ void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry,
  // If available, use Undo data to calculate the fee. Note that txundo == nullptr
  // for coinbase transactions and for transactions where undo data is unavailable.
  - const bool calculate_fee = txundo != nullptr;
  + const bool have_undo = txundo != nullptr;
  CAmount amt_total_in = 0;
  CAmount amt_total_out = 0;
  @@ -204,7 +204,7 @@ void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry,
  }
  in.pushKV("txinwitness", txinwitness);
  }
  - if (calculate_fee) {
  + if (have_undo) {
  const Coin& prev_coin = txundo->vprevout[i];
  const CTxOut& prev_txout = prev_coin.out;
  @@ -246,13 +246,13 @@ void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry,
  out.pushKV("scriptPubKey", o);
  vout.push_back(out);
  - if (calculate_fee) {
  + if (have_undo) {
  amt_total_out += txout.nValue;
  }
  }
  entry.pushKV("vout", vout);
  - if (calculate_fee) {
  + if (have_undo) {
  const CAmount fee = amt_total_in - amt_total_out;
  CHECK_NONFATAL(MoneyRange(fee));
  entry.pushKV("fee", ValueFromAmount(fee));
  