v29.4-roots.1 · Commit 7: [PATCH 07/13] release: establish Roots maintenance and assurance
src/script/script.cpp
Before: src/script/script.cpp · After: src/script/script.cpp
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index fbb52fee7f9b265e8f7f50595fbac1f321c8ff56..d650db9a0d6584d0a8f8d3c2a83aca3a5af3b78e 100644
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Diff rows 1–125 of 125. Line numbers refer to the original before/after files.
+ Added− RemovedUnmarked lines are context.
Scroll the code area horizontally to read long lines. The two line-number columns refer to before and after.
src/script/script.cpp
CHANGED
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@@ -8,7 +8,6 @@
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#include <crypto/common.h>
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#include <crypto/hex_base.h>
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#include <hash.h>
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-
#include <script/interpreter.h>
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#include <uint256.h>
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#include <util/hash_type.h>
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@@ -304,118 +303,6 @@ bool CScript::HasValidOps() const
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return true;
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}
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size_t CScript::IsOLGA(const size_t remaining_outputs) const
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{
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if (!IsPayToWitnessScriptHash()) {
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return 0;
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}
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-
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const size_t olga_payload_size{(size_t{(*this)[2]} << 8) | (*this)[3]};
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const size_t olga_outputs{(olga_payload_size + 1) / WITNESS_V0_SCRIPTHASH_SIZE + 1};
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if (remaining_outputs < olga_outputs) {
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return 0;
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}
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-
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if (((*this)[4] | 0x20) != 's') return 0;
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if (((*this)[5] | 0x20) != 't') return 0;
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if (((*this)[6] | 0x20) != 'a') return 0;
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if (((*this)[7] | 0x20) != 'm') return 0;
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if (((*this)[8] | 0x20) != 'p') return 0;
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if ((*this)[9] != ':') return 0;
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-
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return olga_outputs * (WITNESS_V0_SCRIPTHASH_SIZE + /* script length */ 1 + /* amount */ 8);
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}
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-
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size_t CScript::OPNetWitnessSize(const CScriptWitness& witness) const
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{
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const auto& stack = witness.stack;
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if (stack.size() != 5) return 0;
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if (stack[4].size() != 65) return 0;
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const CScript tapscript{stack[3].begin(), stack[3].end()};
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bool found_opnet{false};
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size_t deduct{0};
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CScript::const_iterator pc = tapscript.begin();
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opcodetype opcode{OP_INVALIDOPCODE}, last_opcode{OP_INVALIDOPCODE};
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std::vector<unsigned char> data;
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while (pc < tapscript.end()) {
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last_opcode = opcode;
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if (!tapscript.GetOp(pc, opcode, data)) break;
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-
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if (data.size() == 2 && data[0] == 0x6f && data[1] == 0x70) {
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found_opnet = true;
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}
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if (opcode == OP_CHECKSIGVERIFY && last_opcode == 0x20) {
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deduct += 34;
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}
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}
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if (!found_opnet) return 0;
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return stack[0].size() + stack[3].size() - deduct;
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}
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std::pair<size_t, size_t> CScript::DatacarrierBytes(const size_t remaining_outputs, const CScriptWitness* witness) const
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{
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if (size_t olga_bytes = IsOLGA(remaining_outputs); olga_bytes) {
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return {0, olga_bytes};
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}
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-
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if (witness) {
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if (uint32_t opnet_bytes = OPNetWitnessSize(*witness); opnet_bytes) {
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return {0, opnet_bytes};
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}
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}
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-
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size_t counted{0};
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opcodetype opcode, last_opcode{OP_INVALIDOPCODE};
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std::vector<unsigned char> push_data;
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unsigned int inside_noop{0}, inside_conditional{0};
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CScript::const_iterator opcode_it = begin(), data_began = begin();
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for (CScript::const_iterator it = begin(); it < end(); last_opcode = opcode) {
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opcode_it = it;
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if (!GetOp(it, opcode, push_data)) {
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// Invalid scripts are necessarily all data
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return {0, size()};
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}
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if (opcode == OP_IF || opcode == OP_NOTIF) {
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++inside_conditional;
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} else if (opcode == OP_ENDIF) {
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if (!inside_conditional) return {0, size()}; // invalid
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--inside_conditional;
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} else if (opcode == OP_RETURN && !inside_conditional) {
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// unconditional OP_RETURN is unspendable
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return {size(), 0};
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}
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// Match OP_FALSE OP_IF
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if (inside_noop) {
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switch (opcode) {
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case OP_IF: case OP_NOTIF:
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++inside_noop;
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break;
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case OP_ENDIF:
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if (0 == --inside_noop) {
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counted += it - data_began + 1;
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}
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break;
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default: /* do nothing */;
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}
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} else if (opcode == OP_IF && last_opcode == OP_FALSE) {
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inside_noop = 1;
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data_began = opcode_it;
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// Match <data> OP_DROP
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} else if (opcode <= OP_PUSHDATA4) {
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data_began = opcode_it;
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} else if (opcode == OP_DROP && last_opcode <= OP_PUSHDATA4) {
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counted += it - data_began;
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}
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}
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return {0, counted};
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}
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bool GetScriptOp(CScriptBase::const_iterator& pc, CScriptBase::const_iterator end, opcodetype& opcodeRet, std::vector<unsigned char>* pvchRet)
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{
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opcodeRet = OP_INVALIDOPCODE;
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