From 80f8b92f4f2311b9e9a25361c9dd973244e6f95c Mon Sep 17 00:00:00 2001
From: fanquake <fanquake@gmail.com>
Date: Mon, 11 Mar 2024 12:12:12 +0000
Subject: remove libbitcoinconsensus

This was deprecated in v27.0, for removal in v28.0.
See discussion in PR #29189.
---
 src/script/bitcoinconsensus.cpp | 157 ----------------------------------------
 1 file changed, 157 deletions(-)
 delete mode 100644 src/script/bitcoinconsensus.cpp

(limited to 'src/script/bitcoinconsensus.cpp')

diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
deleted file mode 100644
index c4eccacf41..0000000000
--- a/src/script/bitcoinconsensus.cpp
+++ /dev/null
@@ -1,157 +0,0 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2022 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#include <script/bitcoinconsensus.h>
-
-#include <primitives/transaction.h>
-#include <pubkey.h>
-#include <script/interpreter.h>
-
-namespace {
-
-/** A class that deserializes a single CTransaction one time. */
-class TxInputStream
-{
-public:
-    TxInputStream(const unsigned char *txTo, size_t txToLen) :
-    m_data(txTo),
-    m_remaining(txToLen)
-    {}
-
-    void read(Span<std::byte> dst)
-    {
-        if (dst.size() > m_remaining) {
-            throw std::ios_base::failure(std::string(__func__) + ": end of data");
-        }
-
-        if (dst.data() == nullptr) {
-            throw std::ios_base::failure(std::string(__func__) + ": bad destination buffer");
-        }
-
-        if (m_data == nullptr) {
-            throw std::ios_base::failure(std::string(__func__) + ": bad source buffer");
-        }
-
-        memcpy(dst.data(), m_data, dst.size());
-        m_remaining -= dst.size();
-        m_data += dst.size();
-    }
-
-    template<typename T>
-    TxInputStream& operator>>(T&& obj)
-    {
-        ::Unserialize(*this, obj);
-        return *this;
-    }
-
-private:
-    const unsigned char* m_data;
-    size_t m_remaining;
-};
-
-inline int set_error(bitcoinconsensus_error* ret, bitcoinconsensus_error serror)
-{
-    if (ret)
-        *ret = serror;
-    return 0;
-}
-
-} // namespace
-
-/** Check that all specified flags are part of the libconsensus interface. */
-static bool verify_flags(unsigned int flags)
-{
-    return (flags & ~(bitcoinconsensus_SCRIPT_FLAGS_VERIFY_ALL)) == 0;
-}
-
-static int verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen, CAmount amount,
-                                    const unsigned char *txTo        , unsigned int txToLen,
-                                    const UTXO *spentOutputs, unsigned int spentOutputsLen,
-                                    unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err)
-{
-    if (!verify_flags(flags)) {
-        return set_error(err, bitcoinconsensus_ERR_INVALID_FLAGS);
-    }
-
-    if (flags & bitcoinconsensus_SCRIPT_FLAGS_VERIFY_TAPROOT && spentOutputs == nullptr) {
-        return set_error(err, bitcoinconsensus_ERR_SPENT_OUTPUTS_REQUIRED);
-    }
-
-    try {
-        TxInputStream stream(txTo, txToLen);
-        CTransaction tx(deserialize, TX_WITH_WITNESS, stream);
-
-        std::vector<CTxOut> spent_outputs;
-        if (spentOutputs != nullptr) {
-            if (spentOutputsLen != tx.vin.size()) {
-                return set_error(err, bitcoinconsensus_ERR_SPENT_OUTPUTS_MISMATCH);
-            }
-            for (size_t i = 0; i < spentOutputsLen; i++) {
-                CScript spk = CScript(spentOutputs[i].scriptPubKey, spentOutputs[i].scriptPubKey + spentOutputs[i].scriptPubKeySize);
-                const CAmount& value = spentOutputs[i].value;
-                CTxOut tx_out = CTxOut(value, spk);
-                spent_outputs.push_back(tx_out);
-            }
-        }
-
-        if (nIn >= tx.vin.size())
-            return set_error(err, bitcoinconsensus_ERR_TX_INDEX);
-        if (GetSerializeSize(TX_WITH_WITNESS(tx)) != txToLen)
-            return set_error(err, bitcoinconsensus_ERR_TX_SIZE_MISMATCH);
-
-        // Regardless of the verification result, the tx did not error.
-        set_error(err, bitcoinconsensus_ERR_OK);
-
-        PrecomputedTransactionData txdata(tx);
-
-        if (spentOutputs != nullptr && flags & bitcoinconsensus_SCRIPT_FLAGS_VERIFY_TAPROOT) {
-            txdata.Init(tx, std::move(spent_outputs));
-        }
-
-        return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), &tx.vin[nIn].scriptWitness, flags, TransactionSignatureChecker(&tx, nIn, amount, txdata, MissingDataBehavior::FAIL), nullptr);
-    } catch (const std::exception&) {
-        return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing
-    }
-}
-
-int bitcoinconsensus_verify_script_with_spent_outputs(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen, int64_t amount,
-                                    const unsigned char *txTo        , unsigned int txToLen,
-                                    const UTXO *spentOutputs, unsigned int spentOutputsLen,
-                                    unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err)
-{
-    CAmount am(amount);
-    return ::verify_script(scriptPubKey, scriptPubKeyLen, am, txTo, txToLen, spentOutputs, spentOutputsLen, nIn, flags, err);
-}
-
-int bitcoinconsensus_verify_script_with_amount(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen, int64_t amount,
-                                    const unsigned char *txTo        , unsigned int txToLen,
-                                    unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err)
-{
-    CAmount am(amount);
-    UTXO *spentOutputs = nullptr;
-    unsigned int spentOutputsLen = 0;
-    return ::verify_script(scriptPubKey, scriptPubKeyLen, am, txTo, txToLen, spentOutputs, spentOutputsLen, nIn, flags, err);
-}
-
-
-int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen,
-                                   const unsigned char *txTo        , unsigned int txToLen,
-                                   unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err)
-{
-    if (flags & bitcoinconsensus_SCRIPT_FLAGS_VERIFY_WITNESS) {
-        return set_error(err, bitcoinconsensus_ERR_AMOUNT_REQUIRED);
-    }
-
-    CAmount am(0);
-    UTXO *spentOutputs = nullptr;
-    unsigned int spentOutputsLen = 0;
-    return ::verify_script(scriptPubKey, scriptPubKeyLen, am, txTo, txToLen, spentOutputs, spentOutputsLen, nIn, flags, err);
-}
-
-unsigned int bitcoinconsensus_version()
-{
-    // Just use the API version for now
-    return BITCOINCONSENSUS_API_VER;
-}
-- 
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