88 lines
3.2 KiB
C++
88 lines
3.2 KiB
C++
/******************************************************************************
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* Copyright © 2014-2018 The SuperNET Developers. *
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* *
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* See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at *
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* the top-level directory of this distribution for the individual copyright *
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* holder information and the developer policies on copyright and licensing. *
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* *
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* Unless otherwise agreed in a custom licensing agreement, no part of the *
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* SuperNET software, including this file may be copied, modified, propagated *
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* or distributed except according to the terms contained in the LICENSE file *
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* *
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* Removal or modification of this copyright notice is prohibited. *
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* *
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******************************************************************************/
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#include "cc/eval.h"
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#include "cc/utils.h"
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#include "importcoin.h"
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#include "crosschain.h"
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#include "primitives/transaction.h"
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/*
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* CC Eval method for import coin.
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*
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* This method should control every parameter of the ImportCoin transaction, since it has no signature
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* to protect it from malleability.
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*/
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bool Eval::ImportCoin(const std::vector<uint8_t> params, const CTransaction &importTx, unsigned int nIn)
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{
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if (importTx.vout.size() < 2)
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return Invalid("too-few-vouts");
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// params
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TxProof proof;
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CTransaction burnTx;
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std::vector<CTxOut> payouts;
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if (!UnmarshalImportTx(importTx, proof, burnTx, payouts))
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return Invalid("invalid-params");
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// Control all aspects of this transaction
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// It should not be at all malleable
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if (MakeImportCoinTransaction(proof, burnTx, payouts).GetHash() != importTx.GetHash())
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return Invalid("non-canonical");
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// burn params
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uint32_t targetCcid;
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std::string targetSymbol;
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uint256 payoutsHash;
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if (!UnmarshalBurnTx(burnTx, targetSymbol, &targetCcid, payoutsHash))
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return Invalid("invalid-burn-tx");
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if (targetCcid != GetAssetchainsCC() || targetSymbol != GetAssetchainsSymbol())
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return Invalid("importcoin-wrong-chain");
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if (targetCcid < KOMODO_FIRSTFUNGIBLEID)
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return Invalid("chain-not-fungible");
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// check burn amount
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{
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uint64_t burnAmount = burnTx.vout.back().nValue;
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if (burnAmount == 0)
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return Invalid("invalid-burn-amount");
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uint64_t totalOut = 0;
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for (int i=0; i<importTx.vout.size(); i++)
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totalOut += importTx.vout[i].nValue;
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if (totalOut > burnAmount)
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return Invalid("payout-too-high");
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}
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// Check burntx shows correct outputs hash
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if (payoutsHash != SerializeHash(payouts))
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return Invalid("wrong-payouts");
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// Check proof confirms existance of burnTx
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{
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uint256 target = proof.second.Exec(burnTx.GetHash());
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if (!CheckMoMoM(proof.first, target))
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return Invalid("momom-check-fail");
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}
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return Valid();
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}
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