Differential D8497 Diff 25958 src/avalanche/proof.cpp

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src/avalanche/proof.cpp

// Copyright (c) 2020 The Bitcoin developers		// Copyright (c) 2020 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying		// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.		// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <avalanche/proof.h>		#include <avalanche/proof.h>

#include <avalanche/validation.h>		#include <avalanche/validation.h>
#include <coins.h> // For SaltedOutpointHasher		#include <coins.h>
#include <hash.h>		#include <hash.h>
		#include <script/standard.h>

#include <unordered_set>		#include <unordered_set>

namespace avalanche {		namespace avalanche {

uint256 Stake::getHash(const ProofId &proofid) const {		uint256 Stake::getHash(const ProofId &proofid) const {
CHashWriter ss(SER_GETHASH, 0);		CHashWriter ss(SER_GETHASH, 0);
ss << proofid;		ss << proofid;
▲ Show 20 Lines • Show All 51 Lines • ▼ Show 20 Lines	for (const SignedStake &ss : stakes) {
if (!ss.verify(proofid)) {		if (!ss.verify(proofid)) {
return state.Invalid(ProofValidationResult::INVALID_SIGNATURE);		return state.Invalid(ProofValidationResult::INVALID_SIGNATURE);
}		}
}		}

return true;		return true;
}		}

		bool Proof::verify(ProofValidationState &state, const CCoinsView &view) const {
		if (!verify(state)) {
		// state is set by verify.
		return false;
		}

		for (const SignedStake &ss : stakes) {
		const Stake &s = ss.getStake();
		const COutPoint &utxo = s.getUTXO();

		Coin coin;
		if (!view.GetCoin(utxo, coin)) {
		// The coins are not in the UTXO set.
		return state.Invalid(ProofValidationResult::MISSING_UTXO);
		}

		const CTxOut &out = coin.GetTxOut();
		if (s.getAmount() != out.nValue) {
		// Wrong amount.
		return state.Invalid(ProofValidationResult::AMOUNT_MISMATCH);
		}

		CTxDestination dest;
		if (!ExtractDestination(out.scriptPubKey, dest)) {
		// Can't extract destination.
		return state.Invalid(
		ProofValidationResult::NON_STANDARD_DESTINATION);
		}

		PKHash *pkhash = boost::get<PKHash>(&dest);
		if (!pkhash) {
		// Only PKHash are supported.
		return state.Invalid(
		ProofValidationResult::DESTINATION_NOT_SUPPORTED);
		}

		const CPubKey &pubkey = s.getPubkey();
		if (*pkhash != PKHash(pubkey)) {
		// Wrong pubkey.
		return state.Invalid(ProofValidationResult::DESTINATION_MISMACTCH);
		}
		}

		return true;
		}

} // namespace avalanche		} // namespace avalanche