scripted-diff: [validation] Rename CheckInputs to CheckInputScripts

CheckInputs() used to check no double spends, scripts & sigs and amounts. Since
832e0744cb8b1e1625cdb19b257f97316ac16a90, the double spend and amount checks
have been moved to CheckTxInputs(), and CheckInputs() now just validates
input scripts. Rename the function to CheckInputScripts().

-BEGIN VERIFY SCRIPT-
sed -i -E -e 's/CheckInputs\b/CheckInputScripts/g' $(git grep -l CheckInputs | grep -v doc/)
-END VERIFY SCRIPT-

5 files changed, 33 insertions, 33 deletions

diff --git a/src/script/standard.h b/src/script/standard.h
index 6db28dbc2d..5931e82b9d 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -47,7 +47,7 @@ extern unsigned nMaxDatacarrierBytes;
  * but in the future other flags may be added, such as a soft-fork to enforce
  * strict DER encoding.
  *
- * Failing one of these tests may trigger a DoS ban - see CheckInputs() for
+ * Failing one of these tests may trigger a DoS ban - see CheckInputScripts() for
  * details.
  */
 static const unsigned int MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH;
diff --git a/src/test/txvalidationcache_tests.cpp b/src/test/txvalidationcache_tests.cpp
index a5bc15bb9f..61539637c1 100644
--- a/src/test/txvalidationcache_tests.cpp
+++ b/src/test/txvalidationcache_tests.cpp
@@ -13,7 +13,7 @@
 
 #include <boost/test/unit_test.hpp>
 
-bool CheckInputs(const CTransaction& tx, TxValidationState &state, const CCoinsViewCache &inputs, unsigned int flags, bool cacheSigStore, bool cacheFullScriptStore, PrecomputedTransactionData& txdata, std::vector<CScriptCheck> *pvChecks);
+bool CheckInputScripts(const CTransaction& tx, TxValidationState &state, const CCoinsViewCache &inputs, unsigned int flags, bool cacheSigStore, bool cacheFullScriptStore, PrecomputedTransactionData& txdata, std::vector<CScriptCheck> *pvChecks);
 
 BOOST_AUTO_TEST_SUITE(tx_validationcache_tests)
 
@@ -97,8 +97,8 @@ BOOST_FIXTURE_TEST_CASE(tx_mempool_block_doublespend, TestChain100Setup)
     BOOST_CHECK_EQUAL(mempool.size(), 0U);
 }
 
-// Run CheckInputs (using CoinsTip()) on the given transaction, for all script
-// flags.  Test that CheckInputs passes for all flags that don't overlap with
+// Run CheckInputScripts (using CoinsTip()) on the given transaction, for all script
+// flags.  Test that CheckInputScripts passes for all flags that don't overlap with
 // the failing_flags argument, but otherwise fails.
 // CHECKLOCKTIMEVERIFY and CHECKSEQUENCEVERIFY (and future NOP codes that may
 // get reassigned) have an interaction with DISCOURAGE_UPGRADABLE_NOPS: if
@@ -125,8 +125,8 @@ static void ValidateCheckInputsForAllFlags(const CTransaction &tx, uint32_t fail
             // WITNESS requires P2SH
             test_flags |= SCRIPT_VERIFY_P2SH;
         }
-        bool ret = CheckInputs(tx, state, &::ChainstateActive().CoinsTip(), test_flags, true, add_to_cache, txdata, nullptr);
-        // CheckInputs should succeed iff test_flags doesn't intersect with
+        bool ret = CheckInputScripts(tx, state, &::ChainstateActive().CoinsTip(), test_flags, true, add_to_cache, txdata, nullptr);
+        // CheckInputScripts should succeed iff test_flags doesn't intersect with
         // failing_flags
         bool expected_return_value = !(test_flags & failing_flags);
         BOOST_CHECK_EQUAL(ret, expected_return_value);
@@ -135,13 +135,13 @@ static void ValidateCheckInputsForAllFlags(const CTransaction &tx, uint32_t fail
         if (ret && add_to_cache) {
             // Check that we get a cache hit if the tx was valid
             std::vector<CScriptCheck> scriptchecks;
-            BOOST_CHECK(CheckInputs(tx, state, &::ChainstateActive().CoinsTip(), test_flags, true, add_to_cache, txdata, &scriptchecks));
+            BOOST_CHECK(CheckInputScripts(tx, state, &::ChainstateActive().CoinsTip(), test_flags, true, add_to_cache, txdata, &scriptchecks));
             BOOST_CHECK(scriptchecks.empty());
         } else {
             // Check that we get script executions to check, if the transaction
             // was invalid, or we didn't add to cache.
             std::vector<CScriptCheck> scriptchecks;
-            BOOST_CHECK(CheckInputs(tx, state, &::ChainstateActive().CoinsTip(), test_flags, true, add_to_cache, txdata, &scriptchecks));
+            BOOST_CHECK(CheckInputScripts(tx, state, &::ChainstateActive().CoinsTip(), test_flags, true, add_to_cache, txdata, &scriptchecks));
             BOOST_CHECK_EQUAL(scriptchecks.size(), tx.vin.size());
         }
     }
@@ -149,7 +149,7 @@ static void ValidateCheckInputsForAllFlags(const CTransaction &tx, uint32_t fail
 
 BOOST_FIXTURE_TEST_CASE(checkinputs_test, TestChain100Setup)
 {
-    // Test that passing CheckInputs with one set of script flags doesn't imply
+    // Test that passing CheckInputScripts with one set of script flags doesn't imply
     // that we would pass again with a different set of flags.
     {
         LOCK(cs_main);
@@ -204,16 +204,16 @@ BOOST_FIXTURE_TEST_CASE(checkinputs_test, TestChain100Setup)
         TxValidationState state;
         PrecomputedTransactionData ptd_spend_tx(spend_tx);
 
-        BOOST_CHECK(!CheckInputs(CTransaction(spend_tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_DERSIG, true, true, ptd_spend_tx, nullptr));
+        BOOST_CHECK(!CheckInputScripts(CTransaction(spend_tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_DERSIG, true, true, ptd_spend_tx, nullptr));
 
         // If we call again asking for scriptchecks (as happens in
         // ConnectBlock), we should add a script check object for this -- we're
         // not caching invalidity (if that changes, delete this test case).
         std::vector<CScriptCheck> scriptchecks;
-        BOOST_CHECK(CheckInputs(CTransaction(spend_tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_DERSIG, true, true, ptd_spend_tx, &scriptchecks));
+        BOOST_CHECK(CheckInputScripts(CTransaction(spend_tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_DERSIG, true, true, ptd_spend_tx, &scriptchecks));
         BOOST_CHECK_EQUAL(scriptchecks.size(), 1U);
 
-        // Test that CheckInputs returns true iff DERSIG-enforcing flags are
+        // Test that CheckInputScripts returns true iff DERSIG-enforcing flags are
         // not present.  Don't add these checks to the cache, so that we can
         // test later that block validation works fine in the absence of cached
         // successes.
@@ -272,7 +272,7 @@ BOOST_FIXTURE_TEST_CASE(checkinputs_test, TestChain100Setup)
         invalid_with_cltv_tx.vin[0].scriptSig = CScript() << vchSig << 100;
         TxValidationState state;
         PrecomputedTransactionData txdata(invalid_with_cltv_tx);
-        BOOST_CHECK(CheckInputs(CTransaction(invalid_with_cltv_tx), state, ::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY, true, true, txdata, nullptr));
+        BOOST_CHECK(CheckInputScripts(CTransaction(invalid_with_cltv_tx), state, ::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY, true, true, txdata, nullptr));
     }
 
     // TEST CHECKSEQUENCEVERIFY
@@ -300,12 +300,12 @@ BOOST_FIXTURE_TEST_CASE(checkinputs_test, TestChain100Setup)
         invalid_with_csv_tx.vin[0].scriptSig = CScript() << vchSig << 100;
         TxValidationState state;
         PrecomputedTransactionData txdata(invalid_with_csv_tx);
-        BOOST_CHECK(CheckInputs(CTransaction(invalid_with_csv_tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_CHECKSEQUENCEVERIFY, true, true, txdata, nullptr));
+        BOOST_CHECK(CheckInputScripts(CTransaction(invalid_with_csv_tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_CHECKSEQUENCEVERIFY, true, true, txdata, nullptr));
     }
 
     // TODO: add tests for remaining script flags
 
-    // Test that passing CheckInputs with a valid witness doesn't imply success
+    // Test that passing CheckInputScripts with a valid witness doesn't imply success
     // for the same tx with a different witness.
     {
         CMutableTransaction valid_with_witness_tx;
@@ -362,12 +362,12 @@ BOOST_FIXTURE_TEST_CASE(checkinputs_test, TestChain100Setup)
         TxValidationState state;
         PrecomputedTransactionData txdata(tx);
         // This transaction is now invalid under segwit, because of the second input.
-        BOOST_CHECK(!CheckInputs(CTransaction(tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, true, true, txdata, nullptr));
+        BOOST_CHECK(!CheckInputScripts(CTransaction(tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, true, true, txdata, nullptr));
 
         std::vector<CScriptCheck> scriptchecks;
         // Make sure this transaction was not cached (ie because the first
         // input was valid)
-        BOOST_CHECK(CheckInputs(CTransaction(tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, true, true, txdata, &scriptchecks));
+        BOOST_CHECK(CheckInputScripts(CTransaction(tx), state, &::ChainstateActive().CoinsTip(), SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS, true, true, txdata, &scriptchecks));
         // Should get 2 script checks back -- caching is on a whole-transaction basis.
         BOOST_CHECK_EQUAL(scriptchecks.size(), 2U);
     }
diff --git a/src/validation.cpp b/src/validation.cpp
index 5a67493b0d..f142e683c5 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -183,7 +183,7 @@ std::unique_ptr<CBlockTreeDB> pblocktree;
 // See definition for documentation
 static void FindFilesToPruneManual(std::set<int>& setFilesToPrune, int nManualPruneHeight);
 static void FindFilesToPrune(std::set<int>& setFilesToPrune, uint64_t nPruneAfterHeight);
-bool CheckInputs(const CTransaction& tx, TxValidationState &state, const CCoinsViewCache &inputs, unsigned int flags, bool cacheSigStore, bool cacheFullScriptStore, PrecomputedTransactionData& txdata, std::vector<CScriptCheck> *pvChecks = nullptr);
+bool CheckInputScripts(const CTransaction& tx, TxValidationState &state, const CCoinsViewCache &inputs, unsigned int flags, bool cacheSigStore, bool cacheFullScriptStore, PrecomputedTransactionData& txdata, std::vector<CScriptCheck> *pvChecks = nullptr);
 static FILE* OpenUndoFile(const FlatFilePos &pos, bool fReadOnly = false);
 static FlatFileSeq BlockFileSeq();
 static FlatFileSeq UndoFileSeq();
@@ -399,7 +399,7 @@ static bool CheckInputsFromMempoolAndCache(const CTransaction& tx, TxValidationS
 
     // pool.cs should be locked already, but go ahead and re-take the lock here
     // to enforce that mempool doesn't change between when we check the view
-    // and when we actually call through to CheckInputs
+    // and when we actually call through to CheckInputScripts
     LOCK(pool.cs);
 
     assert(!tx.IsCoinBase());
@@ -407,7 +407,7 @@ static bool CheckInputsFromMempoolAndCache(const CTransaction& tx, TxValidationS
         const Coin& coin = view.AccessCoin(txin.prevout);
 
         // At this point we haven't actually checked if the coins are all
-        // available (or shouldn't assume we have, since CheckInputs does).
+        // available (or shouldn't assume we have, since CheckInputScripts does).
         // So we just return failure if the inputs are not available here,
         // and then only have to check equivalence for available inputs.
         if (coin.IsSpent()) return false;
@@ -424,8 +424,8 @@ static bool CheckInputsFromMempoolAndCache(const CTransaction& tx, TxValidationS
         }
     }
 
-    // Call CheckInputs() to cache signature and script validity against current tip consensus rules.
-    return CheckInputs(tx, state, view, flags, /* cacheSigStore = */ true, /* cacheFullSciptStore = */ true, txdata);
+    // Call CheckInputScripts() to cache signature and script validity against current tip consensus rules.
+    return CheckInputScripts(tx, state, view, flags, /* cacheSigStore = */ true, /* cacheFullSciptStore = */ true, txdata);
 }
 
 namespace {
@@ -911,18 +911,18 @@ bool MemPoolAccept::PolicyScriptChecks(ATMPArgs& args, Workspace& ws, Precompute
 
     // Check against previous transactions
     // This is done last to help prevent CPU exhaustion denial-of-service attacks.
-    if (!CheckInputs(tx, state, m_view, scriptVerifyFlags, true, false, txdata)) {
+    if (!CheckInputScripts(tx, state, m_view, scriptVerifyFlags, true, false, txdata)) {
         // SCRIPT_VERIFY_CLEANSTACK requires SCRIPT_VERIFY_WITNESS, so we
         // need to turn both off, and compare against just turning off CLEANSTACK
         // to see if the failure is specifically due to witness validation.
-        TxValidationState state_dummy; // Want reported failures to be from first CheckInputs
-        if (!tx.HasWitness() && CheckInputs(tx, state_dummy, m_view, scriptVerifyFlags & ~(SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_CLEANSTACK), true, false, txdata) &&
-                !CheckInputs(tx, state_dummy, m_view, scriptVerifyFlags & ~SCRIPT_VERIFY_CLEANSTACK, true, false, txdata)) {
+        TxValidationState state_dummy; // Want reported failures to be from first CheckInputScripts
+        if (!tx.HasWitness() && CheckInputScripts(tx, state_dummy, m_view, scriptVerifyFlags & ~(SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_CLEANSTACK), true, false, txdata) &&
+                !CheckInputScripts(tx, state_dummy, m_view, scriptVerifyFlags & ~SCRIPT_VERIFY_CLEANSTACK, true, false, txdata)) {
             // Only the witness is missing, so the transaction itself may be fine.
             state.Invalid(TxValidationResult::TX_WITNESS_MUTATED,
                     state.GetRejectReason(), state.GetDebugMessage());
         }
-        return false; // state filled in by CheckInputs
+        return false; // state filled in by CheckInputScripts
     }
 
     return true;
@@ -953,7 +953,7 @@ bool MemPoolAccept::ConsensusScriptChecks(ATMPArgs& args, Workspace& ws, Precomp
     // transactions into the mempool can be exploited as a DoS attack.
     unsigned int currentBlockScriptVerifyFlags = GetBlockScriptFlags(::ChainActive().Tip(), chainparams.GetConsensus());
     if (!CheckInputsFromMempoolAndCache(tx, state, m_view, m_pool, currentBlockScriptVerifyFlags, txdata)) {
-        return error("%s: BUG! PLEASE REPORT THIS! CheckInputs failed against latest-block but not STANDARD flags %s, %s",
+        return error("%s: BUG! PLEASE REPORT THIS! CheckInputScripts failed against latest-block but not STANDARD flags %s, %s",
                 __func__, hash.ToString(), FormatStateMessage(state));
     }
 
@@ -1485,7 +1485,7 @@ void InitScriptExecutionCache() {
  *
  * Non-static (and re-declared) in src/test/txvalidationcache_tests.cpp
  */
-bool CheckInputs(const CTransaction& tx, TxValidationState &state, const CCoinsViewCache &inputs, unsigned int flags, bool cacheSigStore, bool cacheFullScriptStore, PrecomputedTransactionData& txdata, std::vector<CScriptCheck> *pvChecks) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
+bool CheckInputScripts(const CTransaction& tx, TxValidationState &state, const CCoinsViewCache &inputs, unsigned int flags, bool cacheSigStore, bool cacheFullScriptStore, PrecomputedTransactionData& txdata, std::vector<CScriptCheck> *pvChecks) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
 {
     if (tx.IsCoinBase()) return true;
 
@@ -2132,11 +2132,11 @@ bool CChainState::ConnectBlock(const CBlock& block, BlockValidationState& state,
             std::vector<CScriptCheck> vChecks;
             bool fCacheResults = fJustCheck; /* Don't cache results if we're actually connecting blocks (still consult the cache, though) */
             TxValidationState tx_state;
-            if (fScriptChecks && !CheckInputs(tx, tx_state, view, flags, fCacheResults, fCacheResults, txdata[i], g_parallel_script_checks ? &vChecks : nullptr)) {
+            if (fScriptChecks && !CheckInputScripts(tx, tx_state, view, flags, fCacheResults, fCacheResults, txdata[i], g_parallel_script_checks ? &vChecks : nullptr)) {
                 // Any transaction validation failure in ConnectBlock is a block consensus failure
                 state.Invalid(BlockValidationResult::BLOCK_CONSENSUS,
                               tx_state.GetRejectReason(), tx_state.GetDebugMessage());
-                return error("ConnectBlock(): CheckInputs on %s failed with %s",
+                return error("ConnectBlock(): CheckInputScripts on %s failed with %s",
                     tx.GetHash().ToString(), FormatStateMessage(state));
             }
             control.Add(vChecks);
diff --git a/test/functional/feature_cltv.py b/test/functional/feature_cltv.py
index 7d131e6045..2c6f2e733b 100755
--- a/test/functional/feature_cltv.py
+++ b/test/functional/feature_cltv.py
@@ -135,7 +135,7 @@ class BIP65Test(BitcoinTestFramework):
         block.hashMerkleRoot = block.calc_merkle_root()
         block.solve()
 
-        with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputs on {} failed with non-mandatory-script-verify-flag (Negative locktime)'.format(block.vtx[-1].hash)]):
+        with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputScripts on {} failed with non-mandatory-script-verify-flag (Negative locktime)'.format(block.vtx[-1].hash)]):
             self.nodes[0].p2p.send_and_ping(msg_block(block))
             assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
             self.nodes[0].p2p.sync_with_ping()
diff --git a/test/functional/feature_dersig.py b/test/functional/feature_dersig.py
index 2ace96fef4..27da49cf24 100755
--- a/test/functional/feature_dersig.py
+++ b/test/functional/feature_dersig.py
@@ -120,7 +120,7 @@ class BIP66Test(BitcoinTestFramework):
         block.rehash()
         block.solve()
 
-        with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputs on {} failed with non-mandatory-script-verify-flag (Non-canonical DER signature)'.format(block.vtx[-1].hash)]):
+        with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputScripts on {} failed with non-mandatory-script-verify-flag (Non-canonical DER signature)'.format(block.vtx[-1].hash)]):
             self.nodes[0].p2p.send_and_ping(msg_block(block))
             assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
             self.nodes[0].p2p.sync_with_ping()