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Simple question, but I failed to grep for the answer…

It’s sayed balances are already deduced but where ? I mean which file and which line ?

// if we are in applying mode fee was already deduced from signing account
// balance, if not, we need to check if after that deduction this account
// will still have minimum balance
uint32_t feeToPay = (applying && (header.current().ledgerVersion > 8))

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I think in LedgerManager:closeLedger at first fees are applied with processFeesSeqNums() and 6 lines later transactions are applied with applyTransactions() => tx->apply => TransactionFrame:apply => TransactionFrame:commonValid( ..., true)

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  • This is the call stack of the line I gave. But as stated in the code, this is just a check as the fee is already substracted from acc.balance. So the real question is what’s the call chain that leads to acc.balance with the fee ? – user2284570 Jun 11 '19 at 1:38
  • Follow the part where I said "at first fees are applied" => processFeesSeqNums() => LedgerManagerImpl::processFeesSeqNums => tx->processFeeSeqNum() => TransactionFrame::processFeeSeqNum where fee is deducted with stellar::addBalance(acc.balance, -fee); – sui Jun 11 '19 at 6:18
  • Thank you… Just a last question : where transactions with negative fees are rejected ? – user2284570 Jun 16 '19 at 18:15

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