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5b9f316537
I really like this PR, but it wound up being pretty nontrivial to merge. The crux is that it pulls PSBT signing logic into scriptpubkey manager, which is where it belongs, but for us this means reasoning about pegins inside script/sign.cpp. However, sign.cpp is part of libbitcoin_common, which does not include anything for reasoning about PoW or RPC (lol) or anything heavy about that. This means that some pegin validation had to remain split between the wallet/rpc layer and sign.cpp. I added a new file script/pegins.cpp which has the (one) method we actually need in sign.cpp. Aside from that, this diff is very large but is mostly just moving our code changes to wallet/psbtwallet.* into wallet/wallet.* where those functions now live. As far as review, it's probably not worthwhile to spend too much too much time on this since it's going to be change again in #16528 and others. The test coverage is pretty extensive.
46 lines
2.6 KiB
C++
46 lines
2.6 KiB
C++
// Copyright (c) 2017-2018 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_PEGINS_H
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#define BITCOIN_PEGINS_H
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#include <amount.h>
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#include <consensus/params.h>
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#include <merkleblock.h>
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#include <primitives/bitcoin/transaction.h>
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#include <primitives/bitcoin/merkleblock.h>
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#include <primitives/transaction.h>
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#include <script/script.h>
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#include <chain.h>
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/** Calculates script necessary for p2ch peg-in transactions */
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CScript calculate_contract(const CScript& federationRedeemScript, const CScript& witnessProgram);
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bool GetAmountFromParentChainPegin(CAmount& amount, const Sidechain::Bitcoin::CTransaction& txBTC, unsigned int nOut);
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bool GetAmountFromParentChainPegin(CAmount& amount, const CTransaction& txBTC, unsigned int nOut);
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/** Check whether a parent chain block hash satisfies the proof-of-work requirement specified by nBits */
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bool CheckParentProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params&);
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/** Checks pegin witness for validity */
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bool IsValidPeginWitness(const CScriptWitness& pegin_witness, const std::vector<std::pair<CScript, CScript>>& fedpegscripts, const COutPoint& prevout, std::string& err_msg, bool check_depth);
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/* Consensus-critical. Matching against telescoped multisig used on Liquid v1:
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* Pseudo-structure:
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* Check number of elements on stack
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* If enough for federation multisig, push all multisig args onto stack except OP_CMS
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* If not, check CSV timeout, then if successful, push emergency key multisig args on
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* stack except OP_CMS. End if, then push OP_CMS.
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*/
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bool MatchLiquidWatchman(const CScript& script);
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/** Get full fedpegscripts from two previous epoch starts based on given index
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* nextblock_validation is false when doing block validation, true for mempool
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* or "lookahead" purposes. Newest epochs first. The first returned element is the
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* scriptPubKey for the script, the second is the witnessScript. */
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std::vector<std::pair<CScript, CScript>> GetValidFedpegScripts(const CBlockIndex* pblockindex, const Consensus::Params& params, bool nextblock_validation);
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/** Create the peg-in witness stack */
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CScriptWitness CreatePeginWitness(const CAmount& value, const CAsset& asset, const uint256& genesis_hash, const CScript& claim_script, const CTransactionRef& tx_ref, const CMerkleBlock& merkle_block);
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CScriptWitness CreatePeginWitness(const CAmount& value, const CAsset& asset, const uint256& genesis_hash, const CScript& claim_script, const Sidechain::Bitcoin::CTransactionRef& tx_ref, const Sidechain::Bitcoin::CMerkleBlock& merkle_block);
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#endif // BITCOIN_PEGINS_H
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