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Only pass things committed to by tx's witness hash to CScriptCheck

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This clarifies a bit more the ways in which the new script execution
cache could break consensus in the future if additional data from
the CCoins object were to be used as a part of script execution.

After this change, any such consensus breaks should be very visible
to reviewers, hopefully ensuring no such changes can be made.
This commit is contained in:
Matt Corallo
2017-04-27 10:37:33 -04:00
committed by Pieter Wuille
parent f68cdfe92b
commit c87b957a32
4 changed files with 16 additions and 6 deletions
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3
src/test/transaction_tests.cpp
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@@ -481,7 +481,8 @@ BOOST_AUTO_TEST_CASE(test_big_witness_transaction) {
for(uint32_t i = 0; i < mtx.vin.size(); i++) {
std::vector<CScriptCheck> vChecks;
CScriptCheck check(coins, tx, i, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, false, &txdata);
const CTxOut& output = coins.vout[tx.vin[i].prevout.n];
CScriptCheck check(output.scriptPubKey, output.nValue, tx, i, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, false, &txdata);
vChecks.push_back(CScriptCheck());
check.swap(vChecks.back());
control.Add(vChecks);