mirror of
https://github.com/XRPLF/rippled.git
synced 2025-12-06 17:27:55 +00:00
372 lines
9.6 KiB
C++
372 lines
9.6 KiB
C++
#include "TransactionEngine.h"
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#include "TransactionFormats.h"
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#include <boost/format.hpp>
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TransactionEngineResult TransactionEngine::applyTransaction(const SerializedTransaction& txn,
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TransactionEngineParams params)
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{
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std::cerr << "applyTransaction>" << std::endl;
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TransactionEngineResult result = terSUCCESS;
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uint256 txID = txn.getTransactionID();
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if (!txID)
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{
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std::cerr << "applyTransaction: invalid transaction id" << std::endl;
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return tenINVALID;
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}
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// Extract signing key
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// Transactions contain a signing key. This allows us to trivially verify a transaction has at least been properly signed
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// without going to disk. Each transaction also notes a source account id. This is used to verify that the signing key is
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// associated with the account.
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// XXX This could be a lot cleaner to prevent unnecessary copying.
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NewcoinAddress naPubKey;
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naPubKey.setAccountPublic(txn.peekSigningPubKey());
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// check signature
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if (!txn.checkSign(naPubKey))
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{
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std::cerr << "applyTransaction: invalid signature" << std::endl;
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return tenINVALID;
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}
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bool bPrepaid = false;
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// Customize behavoir based on transaction type.
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switch(txn.getTxnType())
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{
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case ttCLAIM:
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bPrepaid = true;
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break;
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case ttMAKE_PAYMENT:
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case ttINVOICE:
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case ttEXCHANGE_OFFER:
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result = terSUCCESS;
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break;
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case ttINVALID:
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std::cerr << "applyTransaction: ttINVALID transaction type" << std::endl;
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result = tenINVALID;
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break;
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default:
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std::cerr << "applyTransaction: unknown transaction type" << std::endl;
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result = tenUNKNOWN;
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break;
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}
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if (terSUCCESS != result)
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return result;
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uint64 txnFee = txn.getTransactionFee();
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if ( (params & tepNO_CHECK_FEE) != tepNONE)
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{
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if (bPrepaid)
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{
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if (txnFee)
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{
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// Transaction is malformed.
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std::cerr << "applyTransaction: fee not allowed" << std::endl;
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return tenINSUF_FEE_P;
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}
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}
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else
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{
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// WRITEME: Check if fee is adequate
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if (txnFee == 0)
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{
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std::cerr << "applyTransaction: insufficient fee" << std::endl;
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return tenINSUF_FEE_P;
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}
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}
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}
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// get source account ID
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uint160 srcAccount = txn.getSourceAccount().getAccountID();
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if (!srcAccount)
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{
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std::cerr << "applyTransaction: bad source id" << std::endl;
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return tenINVALID;
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}
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boost::recursive_mutex::scoped_lock sl(mLedger->mLock);
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// find source account
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// If we are only verifying some transactions, this would be probablistic.
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LedgerStateParms qry = lepNONE;
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SerializedLedgerEntry::pointer src = mLedger->getAccountRoot(qry, srcAccount);
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if (!src)
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{
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std::cerr << str(boost::format("applyTransaction: no such account: %s") % txn.getSourceAccount().humanAccountID()) << std::endl;
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return terNO_ACCOUNT;
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}
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// deduct the fee, so it's not available during the transaction
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// we only write the account back if the transaction succeeds
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if (txnFee)
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{
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uint64 balance = src->getIFieldU64(sfBalance);
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if (balance < txnFee)
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{
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std::cerr << "applyTransaction: insufficent balance" << std::endl;
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return terINSUF_FEE_B;
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}
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src->setIFieldU64(sfBalance, balance - txnFee);
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}
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// Validate sequence
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uint32 t_seq = txn.getSequence();
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if (bPrepaid)
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{
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if (t_seq)
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{
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std::cerr << "applyTransaction: bad sequence for pre-paid transaction" << std::endl;
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return terPAST_SEQ;
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}
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}
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else
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{
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uint32 a_seq = src->getIFieldU32(sfSequence);
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if (t_seq != a_seq)
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{
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// WRITEME: Special case code for changing transaction key
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if (a_seq < t_seq)
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{
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std::cerr << "applyTransaction: future sequence number" << std::endl;
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return terPRE_SEQ;
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}
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if (mLedger->hasTransaction(txID))
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{
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std::cerr << "applyTransaction: duplicate sequence number" << std::endl;
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return terALREADY;
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}
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std::cerr << "applyTransaction: past sequence number" << std::endl;
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return terPAST_SEQ;
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}
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else src->setIFieldU32(sfSequence, t_seq);
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}
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std::vector<AffectedAccount> accounts;
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accounts.push_back(std::make_pair(taaMODIFY, src));
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switch(txn.getTxnType())
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{
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case ttINVALID:
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std::cerr << "applyTransaction: invalid type" << std::endl;
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result = tenINVALID;
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break;
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case ttCLAIM:
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result = doClaim(txn, accounts);
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break;
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case ttMAKE_PAYMENT:
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result = doPayment(txn, accounts);
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break;
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case ttINVOICE:
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result = doInvoice(txn, accounts);
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break;
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case ttEXCHANGE_OFFER:
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result = doOffer(txn, accounts);
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break;
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default:
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result = tenUNKNOWN;
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break;
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}
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if (result == terSUCCESS)
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{ // Write back the account states and add the transaction to the ledger
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// WRITEME: Special case code for changing transaction key
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for (std::vector<AffectedAccount>::iterator it = accounts.begin(), end = accounts.end();
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it != end; ++it)
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{
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if (it->first == taaCREATE)
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{
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if (mLedger->writeBack(lepCREATE, it->second) & lepERROR)
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assert(false);
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}
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else if (it->first == taaMODIFY)
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{
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if (mLedger->writeBack(lepNONE, it->second) & lepERROR)
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assert(false);
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}
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else if (it->first == taaDELETE)
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{
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if (!mLedger->peekAccountStateMap()->delItem(it->second->getIndex()))
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assert(false);
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}
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}
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Serializer s;
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txn.add(s);
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mLedger->addTransaction(txID, s, txnFee);
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}
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return result;
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}
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TransactionEngineResult TransactionEngine::doClaim(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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std::cerr << "doClaim>" << std::endl;
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NewcoinAddress naSigningPubKey;
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naSigningPubKey.setAccountPublic(txn.peekSigningPubKey());
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uint160 sourceAccountID = naSigningPubKey.getAccountID();
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if (sourceAccountID != txn.getSourceAccount().getAccountID())
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{
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// Signing Pub Key must be for Source Account ID.
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std::cerr << "sourceAccountID: " << naSigningPubKey.humanAccountID() << std::endl;
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std::cerr << "txn accountID: " << txn.getSourceAccount().humanAccountID() << std::endl;
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return tenINVALID;
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}
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LedgerStateParms qry = lepNONE;
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SerializedLedgerEntry::pointer dest = accounts[0].second;
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if (!dest)
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{
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// Source account does not exist. Could succeed if it was created first.
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std::cerr << str(boost::format("doClaim: no such account: %s") % txn.getSourceAccount().humanAccountID()) << std::endl;
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return terNO_ACCOUNT;
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}
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std::cerr << str(boost::format("doClaim: %s") % dest->getFullText()) << std::endl;
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if (dest->getIFieldPresent(sfAuthorizedKey))
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{
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// Source account already claimed.
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std::cerr << "doClaim: source already claimed" << std::endl;
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return tenCLAIMED;
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}
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uint160 hGeneratorID = txn.getITFieldH160(sfGeneratorID);
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qry = lepNONE;
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SerializedLedgerEntry::pointer gen = mLedger->getGenerator(qry, hGeneratorID);
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if (gen)
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{
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// Generator is already in use. Regular passphrases limited to one wallet.
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std::cerr << "doClaim: generator already in use" << std::endl;
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return tenGEN_IN_USE;
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}
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//
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// Claim the account.
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//
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std::vector<unsigned char> vucCipher = txn.getITFieldVL(sfGenerator);
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// Set the public key needed to use the account.
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dest->setIFieldH160(sfAuthorizedKey, hGeneratorID);
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// Construct a generator map entry.
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gen = boost::make_shared<SerializedLedgerEntry>(ltGENERATOR_MAP);
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gen->setIndex(Ledger::getGeneratorIndex(hGeneratorID));
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gen->setIFieldH160(sfGeneratorID, hGeneratorID);
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gen->setIFieldVL(sfGenerator, vucCipher);
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accounts.push_back(std::make_pair(taaCREATE, gen));
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std::cerr << "doClaim<" << std::endl;
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return terSUCCESS;
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}
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TransactionEngineResult TransactionEngine::doPayment(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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uint32 txFlags = txn.getFlags();
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uint160 destAccount = txn.getITFieldAccount(sfDestination);
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// Does the destination account exist?
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if (!destAccount) return tenINVALID;
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LedgerStateParms qry = lepNONE;
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// FIXME: If this transfer is to the same account, bad things will happen
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SerializedLedgerEntry::pointer dest = mLedger->getAccountRoot(qry, destAccount);
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if (!dest)
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{ // can this transaction create an account
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if ((txFlags & 0x00010000) == 0) // no
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return terNO_TARGET;
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dest = boost::make_shared<SerializedLedgerEntry>(ltACCOUNT_ROOT);
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dest->setIndex(Ledger::getAccountRootIndex(destAccount));
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dest->setIFieldAccount(sfAccount, destAccount);
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dest->setIFieldU32(sfSequence, 1);
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accounts.push_back(std::make_pair(taaCREATE, dest));
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}
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else accounts.push_back(std::make_pair(taaMODIFY, dest));
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uint64 amount = txn.getITFieldU64(sfAmount);
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uint160 currency;
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if(txn.getITFieldPresent(sfCurrency))
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currency = txn.getITFieldH160(sfCurrency);
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bool native = !!currency;
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if (native)
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{
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uint64 balance = accounts[0].second->getIFieldU64(sfBalance);
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if (balance < amount) return terUNFUNDED;
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accounts[0].second->setIFieldU64(sfBalance, balance - amount);
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accounts[1].second->setIFieldU64(sfBalance, accounts[1].second->getIFieldU64(sfBalance) + amount);
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}
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else
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{
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// WRITEME: Handle non-native currencies, paths
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return tenUNKNOWN;
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}
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return terSUCCESS;
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}
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TransactionEngineResult TransactionEngine::doInvoice(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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return tenUNKNOWN;
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}
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TransactionEngineResult TransactionEngine::doOffer(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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return tenUNKNOWN;
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}
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TransactionEngineResult TransactionEngine::doTake(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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return tenUNKNOWN;
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}
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TransactionEngineResult TransactionEngine::doCancel(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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return tenUNKNOWN;
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}
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TransactionEngineResult TransactionEngine::doStore(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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return tenUNKNOWN;
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}
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TransactionEngineResult TransactionEngine::doDelete(const SerializedTransaction& txn,
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std::vector<AffectedAccount>& accounts)
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{
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return tenUNKNOWN;
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}
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// vim:ts=4
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